3710R/3710VR/3750 Refrigerated Samplers

3710R/3710VR/3750 Refrigerated Samplers
3710R/3710VR/3750
Refrigerated Samplers
Instruction Manual
Part #60-3713-046 of Assembly #60-3714-032
Copyright © 1996, 2003. All rights reserved. Isco, Inc.
Revision W, June 2003
Foreword
This instruction manual is designed to help you gain a thorough understanding of the
operation of the equipment. Isco recommends that you read this manual completely
before placing the equipment in service.
Although Isco designs reliability into all equipment, there is always the possibility of a
malfunction. This manual may help in diagnosing and repairing the malfunction.
If the problem persists, call or email the Isco Customer Service Department for assistance. Contact information is provided below. Simple difficulties can often be diagnosed over the phone. If it is necessary to return the equipment to the factory for
service, please follow the shipping instructions provided by the Customer Service
Department, including the use of the Return Authorization Number specified. Be
sure to include a note describing the malfunction. This will aid in the prompt
repair and return of the equipment.
Isco welcomes suggestions that would improve the information presented in this manual or enhance the operation of the equipment itself.
Isco is continually improving its products and reserves the right to change
product specifications, replacement parts, schematics, and instructions
without notice.
Contact Information
Phone:
(800) 228-4373
(USA, Canada, Mexico)
(402) 464-0231
(Outside North America)
Repair Service: (800) 775-2965
(Analytical and Process
Monitoring Instruments)
(800) 228-4373
Fax:
(Samplers and Flow Meters)
(402) 465-3022
Email address: info@isco.com
Website:
www.isco.com
Return equipment to: 4700 Superior Street, Lincoln, NE 68504-1398
Other correspondence: P.O. Box 82531, Lincoln, NE 68501-2531
Revised February 12, 2003
3710R/3710VR/3750 Refrigerated Sampler
Table of Contents
Types of Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Types of Sample Pacing . . . . . . . . . . . . . . . . . . .
Types of Sampling Available
Through the Extended
Programming Mode . . . . . . . . . . . . . . . . . . . . . . . . .
Nonuniform Time Intervals . . . . . . . . . . . . . . . .
Stops and Resumes . . . . . . . . . . . . . . . . . . . . . . .
Programming Introduction. . . . . . . . . . . . . . . . . . . . . .
Operating States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standby State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Run State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interactive State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programming Modes . . . . . . . . . . . . . . . . . . . . . .
Extended Programming . . . . . . . . . . . . . . . . . . .
Configure Sequence. . . . . . . . . . . . . . . . . . . . . . .
Introduction to the
Programming Procedure . . . . . . . . . . . . . . . . . . . . .
Using the Keypad to
Respond to Displays. . . . . . . . . . . . . . . . . . . . . . . . .
Keypad Description. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Keys . . . . . . . . . . . . . . . . . . . . . . . . . . .
Numeric Keys . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Informational Displays . . . . . . . . . . . . . . . . . . . .
Input Displays . . . . . . . . . . . . . . . . . . . . . . . . . . .
Display Numbers. . . . . . . . . . . . . . . . . . . . . . . . .
Displays with Choices . . . . . . . . . . . . . . . . . . . . .
Numeric Input Displays . . . . . . . . . . . . . . . . . . .
Editing Numbers . . . . . . . . . . . . . . . . . . . . . . . . .
Military Times . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exit Program Key . . . . . . . . . . . . . . . . . . . . . . . .
Programming Examples . . . . . . . . . . . . . . . . . . . . . . . .
Basic Programming Procedure. . . . . . . . . . . . . . . . . . .
Sample Volume . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Head . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration Settings . . . . . . . . . . . . . . . . . . . . . .
Configure Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bottle Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Portable or Refrigerated Sampler . . . . . . . . . . .
Bottle Volume . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cumulative Error . . . . . . . . . . . . . . . . . . . . . . . .
Suction Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable/Disable Detector . . . . . . . . . . . . . . . . . . .
Rinse Cycles. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enter Head Manually . . . . . . . . . . . . . . . . . . . . .
Sampling Retries . . . . . . . . . . . . . . . . . . . . . . . . .
Programming Mode . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load Stored Program . . . . . . . . . . . . . . . . . . . . . . . . . .
Save Current Program . . . . . . . . . . . . . . . . . . . . . . . . .
Flow Mode Sampling . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample at Start Time . . . . . . . . . . . . . . . . . . . . .
Nonuniform Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibrate Sampler. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sampling Stop/Resume. . . . . . . . . . . . . . . . . . . . . . . . .
Enable/Disable. . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample at Stop . . . . . . . . . . . . . . . . . . . . . . . . . .
Sample at Resume. . . . . . . . . . . . . . . . . . . . . . . .
Start Time Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. Product Description . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Manual Organization. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
3710R/3710VR Refrigerated Sampler. . . . . . . . . . . . . . . 1
Programmable Features . . . . . . . . . . . . . . . . . . . . . . . . . 1
Flexible Sampling Intervals. . . . . . . . . . . . . . . . . . 2
Accurate Sample Volumes . . . . . . . . . . . . . . . . . . . 2
Flexible Start Times. . . . . . . . . . . . . . . . . . . . . . . . 2
Foreign Languages and
Metric Units of Measure . . . . . . . . . . . . . . . . . . 2
Delivery System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Liquid Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pump Tubing and Suction Lines . . . . . . . . . . . . . . 3
Weight Table Shut-Off . . . . . . . . . . . . . . . . . . . . . . 3
Strainers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Bottle Configurations . . . . . . . . . . . . . . . . . . . . . . . 3
Power Sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3750 Sampler Refrigerator . . . . . . . . . . . . . . . . . . . . . . . 3
Interfacing Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Isco Flow Meters. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Isco Field Printers Produce
Sampling Reports . . . . . . . . . . . . . . . . . . . . . . . 4
SAMPLINK and Laptop Computers . . . . . . . . . . . 4
583 Field Interrogator . . . . . . . . . . . . . . . . . . . . . . 5
Non-Isco Flow Meters. . . . . . . . . . . . . . . . . . . . . . . 5
Liquid Level Actuator . . . . . . . . . . . . . . . . . . . . . . 5
Technical Specifications,
Controls, and Connectors . . . . . . . . . . . . . . . . . . . . . . 5
2. Setup and
Operating Procedures . . . . . . . . . . . . 9
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Summary of Setup Procedure . . . . . . . . . . . . . . . . . . . . . 9
Attaching the Suction Line . . . . . . . . . . . . . . . . . . . . . . . 9
Attaching the Vinyl Suction
Line to the Pump Tubing . . . . . . . . . . . . . . . . . . . . . . 9
Attaching the Teflon Suction
Line to the Pump Tubing . . . . . . . . . . . . . . . . . . . . . 10
Placement of the Suction
Line and Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Strainers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Intake Placement . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connection to a Power Source . . . . . . . . . . . . . . . . . . . . 10
Connection to a Flow Meter or Flow Logger. . . . . . . . . 11
Operation of the Refrigerator . . . . . . . . . . . . . . . . . . . . 12
Automatic Defrosting . . . . . . . . . . . . . . . . . . . . . . 12
Set Up for Automatic Sampling . . . . . . . . . . . . . . . . . . 12
Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Automatic Sampler Shut-Off. . . . . . . . . . . . . . . . . . . . . 12
3. Programming Guidelines . . . . . . 15
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chapter Organization . . . . . . . . . . . . . . . . . . . . . 15
Description of Sampling Operations . . . . . . . . . . . . . . . 15
Sample Events and the Sampling Cycle . . . . . . . . . . . . 15
i
15
16
16
16
16
16
16
17
17
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17
17
20
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33
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3710R/3710VR/3750 Refrigerated Sampler
Enable Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Sample Upon Disable. . . . . . . . . . . . . . . . . . . . . . 40
Sample Upon Enable . . . . . . . . . . . . . . . . . . . . . . 40
Reset Sample Interval . . . . . . . . . . . . . . . . . . . . . 40
Inhibit Countdown . . . . . . . . . . . . . . . . . . . . . . . . 40
Event Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Continuous/Pulse Signal . . . . . . . . . . . . . . . . . . . 40
Continuous Signal Timing. . . . . . . . . . . . . . . . . . 40
Pulse Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Purge Counts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Tubing Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Program Lock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Sampler ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Acceptable Characters . . . . . . . . . . . . . . . . . . . . . 42
Run Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Software Revision Number . . . . . . . . . . . . . . . . . 42
Test RAM and ROM. . . . . . . . . . . . . . . . . . . . . . . 42
LCD Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Pump Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Re-initialize Controller . . . . . . . . . . . . . . . . . . . . 42
Exit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Extended Programming Mode . . . . . . . . . . . . . . . . . . . 45
Extended Mode Sample Pacing. . . . . . . . . . . . . . . . . . . 45
Extended Mode Sample Volumes . . . . . . . . . . . . . . . . . 45
Extended Mode Key Times . . . . . . . . . . . . . . . . . . . . . . 45
Determining the Number of
Samples with Stops and Resumes . . . . . . . . . 45
Start Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Nonuniform Clock Times and Disable Signals . . 48
Foreign Languages and
Metric Units of Measure. . . . . . . . . . . . . . . . . . . . . . 50
Programming Examples . . . . . . . . . . . . . . . . . . . . . . . . 50
Standby State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Standby Display . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Program Halted . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Additional Displays . . . . . . . . . . . . . . . . . . . . . . . 57
Problem Occurred. . . . . . . . . . . . . . . . . . . . . . . . . 57
Float/Weight Tripped. . . . . . . . . . . . . . . . . . . . . . 57
Display Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Display Status and Reviewing or Printing Program Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Source of Sample Event. . . . . . . . . . . . . . . . . . . . . . . . . 59
Error Messages and Missed Samples . . . . . . . . . . . . . . 60
Run State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Installing a New Pump Tube . . . . . . . . . . . . . . . . . . . .
Replacement of Suction Line . . . . . . . . . . . . . . . . . . . .
Cleaning Suction Line. . . . . . . . . . . . . . . . . . . . .
Replacement Vinyl Line . . . . . . . . . . . . . . . . . . .
Replacement Teflon Line . . . . . . . . . . . . . . . . . .
1/4 and 3/8 Inch ID Vinyl Suction Line . . . . . . . . . . . .
Bulk Suction Line . . . . . . . . . . . . . . . . . . . . . . . .
3/8 Inch ID Teflon Suction Line . . . . . . . . . . . . . . . . . .
Changing the Internal Desiccant . . . . . . . . . . . . . . . . .
Renewing the Desiccant . . . . . . . . . . . . . . . . . . .
4. Routine Maintenance . . . . . . . . . . 63
General Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suction Lines and Strainers. . . . . . . . . . . . . . . . . . . . .
Power Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interfacing Equipment . . . . . . . . . . . . . . . . . . . . . . . . .
65
65
67
67
67
67
67
67
67
67
5. Options and
Interfacing Equipment. . . . . . . . . . . 71
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flow Meter Connections . . . . . . . . . . . . . . . . . . . . . . . .
Isco Flow Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non-Isco Flow Meters . . . . . . . . . . . . . . . . . . . . . . . . . .
Interface Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 1640 Liquid Level Actuator. . . . . . . . . . . . . . . .
71
71
71
71
72
72
6. Servicing . . . . . . . . . . . . . . . . . . . . 75
Servicing Information. . . . . . . . . . . . . . . . . . . . . . . . . . 75
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Servicing the 3710 Controller . . . . . . . . . . . . . . . . . . . 75
If Serious Problems Occur . . . . . . . . . . . . . . . . . 75
Installing a 3710 Controller on the 3750 Refrigerator 78
Access to Electronic Components. . . . . . . . . . . . . . . . . 78
Removal of the Pump Gear Case Assembly . . . . . . . . 80
Precautions for Servicing CMOS Circuitry . . . . . . . . . 81
Preliminary Electronics
Troubleshooting Steps . . . . . . . . . . . . . . . . . . . . . . . 81
Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Pump Control Board . . . . . . . . . . . . . . . . . . . . . . 82
Sample Event Cycle and Delivery of Sample Volumes 86
Peristaltic Pump . . . . . . . . . . . . . . . . . . . . . . . . . 86
Volumetric Determination . . . . . . . . . . . . . . . . . 86
Sample Delivery . . . . . . . . . . . . . . . . . . . . . . . . . 86
A. Replacement Parts . . . . . . . . . . . . 87
B. Accessories List. . . . . . . . . . . . . . . 97
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Weather and Corrosion Resistance. . . . . . . . . . . . . . . . 63
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Sample Bottles . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Cleaning Protocols for Priority Pollutants . . . . . . . . . . 63
Proper Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Cleaning Examples . . . . . . . . . . . . . . . . . . . . . . . 63
Cleaning the Refrigerator . . . . . . . . . . . . . . . . . . . . . . . 64
Cleaning the Bottle Locating
Base and Sample Bottles . . . . . . . . . . . . . . . . . . . . . 64
Replacement of Pump Tubing . . . . . . . . . . . . . . . . . . . . 65
Inspection of Pump Tubing . . . . . . . . . . . . . . . . . 65
Removing the Pump Tubing . . . . . . . . . . . . . . . . . . . . . 65
97
97
97
98
C. Display Index. . . . . . . . . . . . . . . . . 99
D. Calculating
Flow Increment Between Samples105
Calculating Flow Increment Between Samples . . . .
Time Interval Known . . . . . . . . . . . . . . . . . . . .
Number of Samples Known . . . . . . . . . . . . . . .
Calculation of Number of Flow Pulses . . . . . . .
Total Number Of Samples . . . . . . . . . . . . . . . .
Calculation of Sample Volume . . . . . . . . . . . . .
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105
105
105
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106
3710R/3710VR/3750 Refrigerated Sampler
Sample Volume Considerations. . . . . . . . . . . . . 106
11. 6-Pin Flow Meter Connector Wiring . . . . . . . . . . . 72
E. Glossary . . . . . . . . . . . . . . . . . . . . 107
List of Examples
F. Material Safety Data Sheets . . . 109
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Checking the Configure Option Settings . . . . . . .
Time-paced Sampling . . . . . . . . . . . . . . . . . . . . . .
Flow-paced Sampling . . . . . . . . . . . . . . . . . . . . . . .
Calibration Procedure . . . . . . . . . . . . . . . . . . . . . .
Loading a Stored Program. . . . . . . . . . . . . . . . . . .
Saving a Current Program . . . . . . . . . . . . . . . . . .
Extended Time-paced Sampling . . . . . . . . . . . . . .
Nonuniform Time-paced Sampling . . . . . . . . . . . .
Nonuniform Times as Specific Clock Times . . . . .
Extended Time-paced Sampling Using Stops and
Resumes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11. Program Started Later than Programmed Start
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12. Program Started Later than Programmed Stop
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13. Display Status: Results of Sampling Program . . .
List of Figures
1. Tube Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2. Tube Coupling with
Suction Line and Pump Tubing . . . . . . . . . . . . . . 10
3. Stainless Steel Strainer . . . . . . . . . . . . . . . . . . . . . 10
4. CPVC Strainer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5. Flow Meter Cable Connection
and Suction Line Port . . . . . . . . . . . . . . . . . . . . . 11
6. Sampler Shut-off Calibration . . . . . . . . . . . . . . . . . 13
7. Interactive State Structure. . . . . . . . . . . . . . . . . . . 18
8. 3710R/3710VR Sampler Control Panel . . . . . . . . . 22
9. Basic Programming Mode:
Program Sequence Structure. . . . . . . . . . . . . . . . 25
10. Event Mark Signal Output . . . . . . . . . . . . . . . . . . . 41
11. Extended Programming Mode: Program Sequence
Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
12. Simplified Start Time Diagram . . . . . . . . . . . . . . . 47
13. Start Time Diagram . . . . . . . . . . . . . . . . . . . . . . . . 48
14. Start Time Diagram for Nonuniform Clock Time
Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
15. Liquid Detector and Pump Case. . . . . . . . . . . . . . . 66
16. Interior of Liquid Detector and Pump Case. . . . . . 66
17. Location of 10 Screws on Control Box Bezel . . . . . 68
18. Control Box Internal Desiccant . . . . . . . . . . . . . . . 69
19. Pin Location for 6-pin Connector . . . . . . . . . . . . . . 71
20. Type A Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
21. 4-20 mA Sampler Input Interface . . . . . . . . . . . . . 73
22. Refrigeration Schematic Diagram . . . . . . . . . . . . . 75
23. 3710R/3710VR/3750 Electrical Schematic – From S/
N 196C01812 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
24. 3710R/3750 Electrical Schematic – Before S/N
196C01812 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
25. Mounting the Control Box . . . . . . . . . . . . . . . . . . . 78
26. Underside of the Control Box Cover. . . . . . . . . . . . 79
27. Main Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . 79
28. Control Box Tray Removal . . . . . . . . . . . . . . . . . . . 80
29. Optical Counter PCB Component Layout . . . . . . . 82
32. Case Schematic Diagram . . . . . . . . . . . . . . . . . . . . 85
33. Time Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
List of Tables
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . 6
Controls and Connectors. . . . . . . . . . . . . . . . . . . . . . 7
Safe Depths of Submersion for Suction Line . . . . . . 9
Configure Option Functions . . . . . . . . . . . . . . . . . . 19
Standard Bottle Volume Settings. . . . . . . . . . . . . . 34
Sampling Capabilities available through the Program Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Factory Program Sequence Settings . . . . . . . . . . . 43
Factory Configure Option Settings. . . . . . . . . . . . . 44
Run State Displays: Composite Sampling . . . . . . . 61
6-Pin Printer Connector Wiring . . . . . . . . . . . . . . . 72
iii
27
29
31
32
37
38
50
52
53
54
57
58
59
3710R/3710VR/3750 Refrigerated Sampler
iv
3710R/3710VR/3750 Refrigerated Sampler
Chapter 1 Product Description
INTRODUCTION
for flow proportional sampling and sampler enable
control, Isco Field Printers that print the sampler’s
program settings and sampling results, and laptop
computers which collect and store the same data. A
brief discussion of this interfacing equipment is
placed at the end of this chapter.
This chapter contains a brief discussion of the
organization of the manual, an overall description
of the sampler, and a list of technical specifications.
MANUAL ORGANIZATION
The 3710R Refrigerated Sampler consists of the
3750 Stainless Steel Refrigerator with the 3710
controller installed on the refrigerator at the factory. The 3710VR Refrigerated Sampler consists of
the 3750 Vinyl Refrigerator with the 3710 controller installed at the factory. (The 3750 is discussed
in 3750 Sampler Refrigerator on page 3.) The controller is housed in the watertight control box
mounted on the top of the refrigerator. However,
the refrigerator’s lower compartment is not watertight.
This manual contains the information necessary to
operate, maintain, and service the 3710R/3710VR/
3750 Refrigerated Sampler.
The manual has six chapters:
Chapter 1 is a general introduction to the sampler and refrigerator.
Chapter 2 concerns preparation for use, operating
the refrigerator, and operating the automatic
refrigerated sampling.
Chapter 3 covers programming guidelines.
The controller consists of a microprocessor with
software embedded in a PROM (Programmable
Read-Only Memory) and supporting electronics.
The controller runs the pump, responds to the keypad, and presents information on the display. It
governs all automatic sampling according to userselectable program settings. The controller also
provides for manual control of the sampler; for
instance, you can run the pump forward with the
PUMP FORWARD key or initiate a manual sample
with the MANUAL SAMPLE key.
Chapter 4 contains routine maintenance information for the 3710R/3710VR/3750.
Chapter 5 discusses optional equipment that will
interface with the sampler.
Chapter 6 includes servicing information to assist
you in correcting problems. It also contains an
accessories list and an illustrated list of replacement parts.
DESCRIPTION
The control panel, containing the 40-character
alphanumeric LCD (Liquid Crystal Display) and
keypad, is located on the top of the control box.
The 23-position keypad is used to enter program
parameters and direct the following controls: on /
o ff, pump reverse, pump forward, stop the pump,
start sampling, resume sampling, and display the
operating status. A desiccator is installed in the
control box to prevent moisture damage to the
electronics and pump.
The 3710R/3710VR consists of a 3750 refrigerator
and a 3710 controller mounted on the refrigerator.
This instruction manual covers the four configurations in which the refrigerator is available: the
3710R, the 3710VR, the stainless steel 3750, and
the vinyl 3750. Each configuration is discussed
individually in the following sections.
3710R/3710VR REFRIGERATED SAMPLER
The 3710R/3710VR/3750 Refrigerated Sampler is
a programmable liquid sampler designed for composite sampling. It is one of Isco’s 3700 Series of
portable and refrigerated samplers. The extensive
sampling capabilities, flexible programming, and
durable construction make the sampler ideally
suited for general purpose or priority pollutant
sampling.
PROGRAMMABLE FEATURES
An intuitive user-interface allows the sampler to
be programmed for both simple and complex sampling schemes. The LCD prompts you through the
programming process by presenting a choice or a
question on the sampler’s LCD. Programming the
sampler is a matter of responding to displayed
prompts with the keypad. Two programming
modes, “basic” and “extended,” are standard with
the sampler. The basic programming mode allows
you to set up typical sampling routines easily and
efficiently.
The sampler, although extremely easy to use,
offers a number of very sophisticated features. The
following sections introduce key features and provide an overview of the unit’s sampling capabilities
and a variety of interfacing equipment. Examples
of interfacing equipment include Isco flow meters
1
3710R/3710VR/3750 Refrigerated Sampler
resumes can be used with both flow- and timepaced routines and with uniform and nonuniform
time intervals.
The extended programming mode expands the versatility of the sampler by providing options which
allow you to create complex sampling routines.
The LCD not only prompts you through the programming process, but also allows you to closely
monitor a sampling routine as it is executed. The
LCD displays pertinent information about the routine – for example, the time of the next sample –
and notifies you of any problems encountered during the routine. As the routine progresses, the
sampler logs (stores) key information about the
results of the routine. The results include the start
time, any halt and resume times, time of samples,
and cause of any missed samples. This information
is accessible during a routine or after a sampling
routine is finished. You can view this information
from the sampler’s display or retrieve it with the
Field Printer or a laptop computer running Isco’s
SAMPLINK® software.
Accurate Sample Volumes
The sampler can be programmed to take sample
volumes of 10 to 9990 milliliters. Equipped with
the patented LD90 liquid presence detector, the
sampler delivers accurate, repeatable sample volumes in changing head conditions. The LD90 is a
non-wetted liquid presence detector. It detects virtually any pumpable liquid and because it is nonwetted; sample conductivity, viscosity, temperature, and composition do not affect detection.
Although it is not normally necessary, samples can
be calibrated, if desired.
Flexible Start Times
A sampling routine can be programmed to use a
specific start time and date or a start time delay.
The sampler will accept a specific start time and
date up to one month in advance of the current
date. The start time delay is the period between
the time you press the START SAMPLING key and
the time the routine actually starts. It is adjustable from zero to 9999 minutes.
Flexible Sampling Intervals
The 3710R/3710VR is designed for composite sampling. Samples may be collected at user-definable
time intervals (time-pacing) or at equal flow volume intervals using flow pulse inputs from an
external flow meter (flow-pacing). The flow interval
may be set from 1 to 9999 flow pulses. Sampling
can be terminated by a weight table shut-off mechanism or by a user-defined number of samples.
Other features are available. Program storage
allows you to store up to three separate programs,
eliminating the need to reprogram the sampler for
recurrent sampling routines. A program lock is
available for protection from unauthorized program alterations. When enabled, a password must
be entered before any program settings can be
changed, although program settings can be viewed
at any time.
The sampler offers two types of time-pacing: uniform and nonuniform. Uniform time-paced samples may be taken at regular time intervals, a
sample every 15 minutes, for example. The interval between samples can be set from 1 minute to
99 hours, 59 minutes in 1 minute intervals. Using
the extended programming mode, you can specify
up to 999 (or bottle volume dependent) non-uniform time intervals in minutes. For example, you
can program the sampler to take the first six samples at 10 minutes intervals, then four more samples at 15 minute intervals, and so on. Nonuniform time intervals can be from 1 to 999 minutes in 1 minute intervals. Nonuniform times can
be specified in a clock-time format by entering a
time and date for each sample. The sampler will
accept up to 99 nonuniform clock times.
Foreign Languages and
Metric Units of Measure
The sampler provides displays in French, German,
and Spanish. Additionally, the software supports
entries in metric units of measure. Samplers using
French and German language displays support
metric units for suction line and suction head measurements. Metric units include volumes in milliliters, suction head and suction line length in
decimeters, and suction line inside diameter (ID)
in millimeters. Samplers operating with English
displays support either English or metric units for
suction line and suction head measurements.
(Sample volume units are always entered in milliliters, regardless of the selected language.)
Additionally, the Sampling Stops and Resumes
feature allows you to create an intermittent sampling schedule. With this extended programming
feature, you can sample only during key periods of
the day. For example, you may wish to sample only
during the hours of 6:00 AM to 8:00 AM, and 5:00
PM to 7:00 PM. You can enter up to 12 sampling
stops and 12 resumes. Sampling stops and
2
3710R/3710VR/3750 Refrigerated Sampler
DELIVERY SYSTEM
Weight Table Shut-Off
The sampler uses a peristaltic pump for sample collection. The sample liquid is under pumped flow at
all times; there are no metering chambers or gravity-fed internal tubing. Each sampling cycle includes
an air pre-sample purge and a post-sample purge to
clear the suction line both before and after sampling.
These features make the sampler ideal for both “suspended solids” and “toxic materials” sampling. Cross
contamination between samples is minimized and
sites for sediment accumulation in the system are
eliminated. Materials in contact with the sample
fluid are limited to the strainer, suction line, pump
tubing, and collection bottles. The system can be
easily and safely cleaned by simply replacing relatively inexpensive lengths of tubing.
The weight table shut off provides a sampling failsafe shut-off in case the container is accidentally
overfilled. When the container is filled to a selectable, predetermined level, a weight activated control stops the sampling process and a red indicator
light illuminates to alert you of the full container.
Strainers
Two stainless steel strainers are available for priority pollutant applications: a larger unit for normal flow and a smaller unit for low flow situations.
An all-plastic CPVC strainer is available for sampling from highly acidic flow streams.
Bottle Configurations
Four sample containers are available:
• 9400 ml (2.5 gallon) glass container with
Teflon lined cap.
• 9400 ml (2.5 gallon) polyethylene container
with unlined cap.
• 15,000 ml (4 gallon) polyethylene container
with unlined cap.
• 20,800 ml (5.5 gallon) polyethylene container
with unlined cap.
Pump speed is approximately 250 RPM which generates a velocity sufficient to obtain representative
samples. The pumping rate of 3500 ml per minute
is generated when using 3/8 inch ID suction line at
3 ft of head. The line transport velocity, using the
same suction line and head, is 2.5 ft per second.
Volumetric accuracy is not significantly affected by
pump speed since the delivered volume is based on
a patented electronic count of the number of pump
revolutions.
Power Sources
The refrigerator operates from 120 VAC, 60 Hz
power (optionally 240 VAC, 50 Hz). A 12 VDC
power converter, built into the refrigerator, supplies power to the controller.
Liquid Detector
The LD90 gives the sampler the ability to deliver
accurate, repeatable sample volumes regardless of
changing head conditions. Typical sample volumes
are accurate to within 10% of the programmed volume and repeatable to within ± 10 ml. The detector and a programmable setting provide for
automatic rinsing of the suction line when concerns of cross contamination arise. A programmable setting for sampling retries is available. If the
suction line becomes clogged and no liquid is
detected in the line, the sampler can be programmed to repeat a purge cycle – up to three
times – to clear the clogged line.
In the case of critical sampling, the sampler’s controller may be powered by an external 12 VDC battery, as described in Connection to a Power Source
on page 10. This allows sampling to continue even
if a power failure causes the refrigerator’s cooling
system to stop functioning. Optionally available
from Isco is a Power Fail-Safe unit which, under
normal conditions, trickle-charges an external battery, and, in the event of a line power failure, supplies 12 VDC power from the battery to the
sampler’s controller. Consult the factory for
details. More information on Isco power sources is
available in Isco’s Power Products Guide.
Pump Tubing and Suction Lines
The pump tubing is Silastic™ medical grade silicon rubber. Liquid is transferred from the source
to the pump through either 1/4 or 3/8 inch ID vinyl
or 3/8 inch ID Teflon® suction tubing. The pump
tubing and suction lines are easily replaced, minimizing the need for cleaning. The sampler automatically monitors pump tubing wear: a tubing
warning indication is reported on the display when
the pump revolution count exceeds a user-specified
wear limit.
3750 SAMPLER REFRIGERATOR
If you want to convert a presently owned 3710 Portable Sampler into a refrigerated unit, or to have
both portable and refrigerated options with the
same controller, the 3750 Sampler Refrigerator is
available. The 3750 includes all the parts necessary to attach the controller from a portable sampler to the refrigerator.
The exterior of the refrigerator is constructed of
3
3710R/3710VR/3750 Refrigerated Sampler
either stainless steel or vinyl-clad steel. Foamed-inplace insulation stiffens the sample compartment.
The plastic interior will not support bacterial
growth or retain odors. Both the controller cover
and sample compartment may be individually padlocked. The door has a magnetic gasket which seals
against a stainless steel bezel.
in 15 minutes. While level control conditions can
be entered directly at the flow meter front panel,
most control conditions must be downloaded to the
flow meter from an IBM® compatible computer
running Isco’s FLOWLINK® software.
In addition to enable control conditions, Isco’s
Flow Meters and Flow Loggers provide an internal
memory module. When programmed with the
FLOWLINK software, the flow meters store level
or flow rate readings, rainfall measurements, and
sample event data from the samplers. The stored
data, which expands the information available
from the sampler’s results displays, can be
retrieved with a computer running the FLOWLINK software. For more detailed information on
sampler enable control conditions and data
retrieval, refer to the FLOWLINK Instruction
Manual provided with the FLOWLINK software.
The refrigerator’s thermostat is calibrated at the
factory to be accurate at 4oC (39oF). A forced-air
condensing coil and front ventilation allow the
unit to be positioned close to a wall or in a corner
with clearance required only for the controller
cover to open. Wrap-around construction of the
evaporator plate provides quick and efficient cooling of the sample compartment. Defrosting is automatic under normal operating conditions. The
technical specifications of the 3710R/3710VR/3750
are found in Table 1.
Isco Field Printers Produce
Sampling Reports
INTERFACING EQUIPMENT
A full line of accessories and interfacing equipment is available to help you adapt the sampler to
your specific application; some of the more common items are briefly noted below. Other key
accessories are noted throughout this manual,
where appropriate. A full list of accessories is
found in the Accessories List appendix.
Isco provides two additional interfacing products,
the Isco Field Printer and the SAMPLINK software, which collect data from the sampler’s memory. The Isco Field Printer is a portable field
printer designed to print sampling data from a
3700 Series Sampler. You can initiate the reports
from either the printer or the sampler.
Isco Flow Meters
The Isco Field Printer prints two reports which
reproduce the data collected by the sampler. The
first report lists the current status data and program settings for the sampling routine. The second
report lists the sampling results currently stored in
the sampler’s memory. The results include the time,
date, and bottle numbers for each sample event and
any errors encountered during the routine.
The sampler will accept flow pulses from all Isco
Flow Meters and Flow Loggers for flow proportional sampling. Isco Flow Meters and Flow Loggers are equipped with a sampler enable feature.
They can inhibit a sampler until the level of the
flow stream reaches a predetermined height or
“set point”; when that height is reached, the flow
meter enables the sampler and starts the sampling routine. If the level of the stream falls below
the set point, the flow meter can disable the sampler and halt the routine.
SAMPLINK and Laptop Computers
SAMPLINK is designed to run on a laptop computer
which can be taken to the sampling installation to
collect the data. SAMPLINK collects the data and
formats it into two files: a text file and a FLOWLINK compatible sample event file. The text file can
be loaded into a word processor for editing. SAMPLINK’s text file contains the same two reports produced by the Field Printer. The first report contains
sampler status information and program settings.
The second report contains the sampling results.
Because the text file is pre-formatted into report
form, you can use DOS printing commands to print
the file without editing with a word processor. The
sample event files can be used with FLOWLINK to
produce sampling reports and graphs.
When equipped with a rain gauge, Isco Flow
Meters and Flow Loggers can monitor rainfall. The
flow meter can be programmed to enable the sampler when the measured amount of rainfall
reaches a predetermined set point.
Set points or pairs of set points — pairs can be
level and rainfall rates, level and elapsed time,
rainfall and elapsed time, and so on — form the
sampler enable control condition. A control condition is simply the set of parameters defining the
conditions in which a flow meter will enable the
sampler. For example, a flow meter can be programmed with a control condition which is satisfied when the flow meter detects 1/4 inch of rainfall
4
3710R/3710VR/3750 Refrigerated Sampler
583 Field Interrogator
The 583 Field Interrogator is a small, environmentally-hardened field computer. Compatible with
3700 Series Samplers, it collects sampling data as
a text file. The Field interrogator will print the file
on an IBM PC-compatible serial printer or send it
to a computer where the file can be edited with a
word processor.
Non-Isco Flow Meters
Flow pulses are also accepted from certain nonIsco flow meters; two interface accessories are
available to convert incompatible (non-Isco) signals to pulses acceptable to the sampler. The Type
A Interface converts pulse duration input; the 4-20
mA Sampler Input Interface converts 4-20 mA output signals.
The sampler sends event marks to both Isco and
non-Isco flow meters each time a sample is taken.
This information is recorded by the flow meter.
The event mark can be adjusted according to the
type of flow meter used.
Liquid Level Actuator
Another item, the Liquid Level Actuator, is used to
provide level sensitive control of the sampler. The
actuator can be used as an alternative to a Flow
Meter or Flow Logger.
TECHNICAL SPECIFICATIONS,
CONTROLS, AND CONNECTORS
The technical specifications, controls, and connectors of the 3710R/3710VR/3750 are listed in
Tables 1 and 2. Refer to Figure 5 on page 11 for a
pictorial view of the controls and connectors.
5
3710R/3710VR/3750 Refrigerated Sampler
Table 1 Technical Specifications
Physical Specifications
Physical Size:
Height:
Width:
Depth:
45.75 inches (116 cm)
24.25 inches (62 cm)
25 inches (64 cm)
Dry weight:
Stainless Steel: 145 lb (65.8 kg)
Vinyl-Clad Steel: 120 lb (54.5 kg)
Operational Temperature Range:
32oF to 120oF (0oC to 49oC)
Control Box Only:
(does not include refrigerator)
Self Certified NEMA 4X and 6 ratings
(Submersible, watertight, dust-tight, and corrosion resistant)
Temperature set point accuracy:
± 1.8oF (1oC) at 39oF (4oC)
Pulldown time from 75oF (24oC) to 39oF (4oC):
30 minutes, typical
Recovery time, door open 1 minute with unit
operating at 39oF (4oC), 75oF (24oC) ambient:
10 minutes, typical
Power Specifications
Sampler Controller Power Requirement:
12 VDC AC power converter
Sampler standby current 10 mA, maximum
Voltage:
120 V, 60 Hz (240 V, 50 Hz available)
Current:
Running:
Starting:
2.5 amp, typical 120 volts. (1.25 amp, typical 240 volts)
12 amp, typical 120 volts. (6 amp, typical 240 volts)
Controller Internal 3V Lithium
Battery Capacity
5 years, minimum (maintains internal logic and program settings)
Pump and Tubing Specifications
3 to 99 foot lengths of:
1
/4-inch ID vinyl
3
/8-inch ID vinyl
3
/8-inch ID Teflon lined
Suction Tubing (intake):
Suction Lift:
26 feet (7.9 m), maximum
1
/4-inch ID suction tubing: 3000 ml / minute
/8-inch ID suction tubing: 3500 ml / minute
Pumping Rate (at 3 feet of head):
3
1
Line Transport Velocity (at 3 feet of head):
/4-inch ID suction tubing: 5.1 ft / sec
/8-inch ID suction tubing: 2.9 ft / sec
3
Clock Specifications
Real Time Clock Accuracy:
1 minute / month, typical
Sample Specifications
Sample Volume Accuracy:
With the liquid detector enabled and automatic compensation for
head: typically, the greater of ± 10% or ± 20 ml, over a head range of
1 to 12 feet and sampler supply voltage of 10 to 13 volts.
Sample Volume Repeatability:
± 10 ml, typical.
Sample Frequency:
Selectable from one minute to 99 hours, 59 minutes in 1 minute
increments between consecutive samples, or from 1 to 9999 flow
pulses in single pulse intervals. Up to 999 nonuniform times may be
entered in minute intervals or up to 99 times as specific clock times.
Flow Meter Signal Specifications
Flow Meter Signal Requirements:
5 to 15 volt DC pulse or isolated contact closure of at least 25 milliseconds in duration. (4-20 mA or pulse duration signal may be converted with optional interface unit).
6
3710R/3710VR/3750 Refrigerated Sampler
Table 2 Controls and Connectors
Controls
CONTROL
SETTING
FUNCTION
Thermostat:
OFF, WARMER, COOLER,
4oC (39oF).
Turns the refrigeration system on/off, selects
the sample temperature.
Fully adjustable, weight sensitive control stops
sampling program when predetermined volume
is reached.
Weight Table Automatic ShutVariable.
off:
Connectors
CONNECTOR
TYPE
FUNCTION
12 VDC:
2-pin female cable mounted.
12 VDC power supply for sampler.
Flow Meter:
6-pin male panel mounted.
Connects sampler to external flow meter.
Printer:
6-pin female panel mounted.
Connects sampler to Isco Field Printer or laptop
computer.
Sampler:
6-pin female cable mounted.
Connects shut-off cable from the weight table
and the flow meter to the sampler’s controller.
120 or 240 VAC:
3-pin grounded male line cord.
Supplies line voltage for the unit.
Indicator
INDICATOR
TYPE
FUNCTION
Bottle Full Light:
Red light.
Indicates that composite sample has reached
the predetermined volume and sampling has
stopped.
7
3710R/3710VR/3750 Refrigerated Sampler
8
3710R/3710VR/3750 Refrigerated Sampler
Chapter 2 Setup and
Operating Procedures
INTRODUCTION
The vinyl suction tubing contains a very low PPM
(parts per million) level of phenols. If this affects
your samples, use the Teflon suction line.
This chapter provides the information necessary
for everyday operation of the refrigerator. Included
are sections covering setup, operation of the refrigerator, and automatic refrigerated sampling.
Both vinyl and Teflon lines can be cut to any
length from 3 to 99 feet in 1 foot increments. Cut
the suction line in whole foot increments: lengths
of 4 feet, not 3.5 feet. The controller will accept
only whole numbers as suction line lengths. To
ensure the accuracy of the sampler, the suction
line length entered must equal that of the actual
line measurement. When programming the sampler, you must enter the inside diameter, type, and
length of suction line used.
SUMMARY OF SETUP PROCEDURE
The following sections detail the preparations
made before using the refrigerator. To place the
sampler into operation:
1. Install the sampler.
Although the suction line can extend to a liquid
source up to 99 feet from the sampler, note that
the maximum lift for the peristaltic pump with
either the Teflon or vinyl line is 26 feet. When
installing the sampler, be sure the head — the
vertical distance between the level of the liquid
source and the pump — is no greater than 26
feet. The pump will not be able to deliver samples for heads of 26 feet or greater.
2. Do not install the refrigerator in a location
where the lower compartment could become
submerged.
3. Be sure the sampler is connected to a 120 VAC
power source. Turn the refrigerator on.
4. Attach the suction line.
5. Place the suction line inlet properly in the liquid
source.
6. Connect the sampler to a flow meter, if required.
7. Program the sampler. See Chapter 3.
8. Calibrate the sample volume, if desired. Chapter 3 contains calibration instructions.)
9. Calibrate the weight table. See Automatic Sampler Shut-Off on page 12.
10.Start the sampling routine.
Cut the line to the shortest length feasible: this
aids the downhill routing. Avoid loops of coiled suction line which may hold residual amounts of liquid
which would cross contaminate sample volumes. A
shorter suction line will also extend battery life and
pump tube life because a shorter pumping cycle
will be needed to deliver the sample volume.
The suction line tends to float in deep flow
streams, dislodging the line and strainer. Table 3
shows the maximum depths you can submerge the
lines and strainers without risking flotation. At
depths exceeding the safe depths, anchor the line
and strainer securely.
Table 3 Safe Depths of Submersion for
Suction Line
1
/4"
Strainer
Stainless Steel:
CPVC:
3
/8"
3
Vinyl
Line
Vinyl
Line
/8"
Teflon
Line
22 feet
22 feet
15 feet
-------
4 feet
-------
ATTACHING THE VINYL SUCTION
LINE TO THE PUMP TUBING
ATTACHING THE SUCTION LINE
The suction line is the piece of tubing that extends
from the sampler’s pump tubing intake, at the top
of the liquid detector, to the liquid source. There
are three standard suction lines available: plasticized vinyl tubing in 1/4 inch (0.64 cm) or 3/8 inch
(0.94 cm) inside diameters, or FEP Teflon with a
polyethylene cover in 3/8 inch inside diameter. The
polyethylene cover over the 0.02 inch (0.051 cm)
wall Teflon tubing prevents the Teflon liner from
kinking or collapsing in service and protects it
from abrasion and other damage.
Vinyl suction line is attached to the pump tubing
with the tube coupling as illustrated in Figures 1
and 2. Two couplings are available, one for each
size of vinyl line.
9
3710R/3710VR/3750 Refrigerated Sampler
Strainers
Each coupling has two color coded nylon clamps
attached to the stainless steel ferrule. The black
clamp secures the pump tube to the coupling. The
white clamp secures the suction line. To attach the
line or tubing to the coupling, push it onto the
appropriate side of the ferrule and tighten the
clamp by squeezing the finger pads together. To
loosen a clamp, twist the two sides of the clamp
until the teeth disengage.
1
3
The /4 and /8 inch ID (inside diameter) vinyl suction lines are shipped from the factory with a stainless steel inlet strainer installed on the end of the
suction line.
For sampling from highly acidic flow streams, an
all-plastic CPVC strainer is available. Bulk suction line can be purchased without strainers. Refer
to the Accessories List appendix more information.
ATTACHING THE TEFLON SUCTION
LINE TO THE PUMP TUBING
The strainer prevents solid particles over a specific
diameter from entering and clogging the suction
line. It is recommended for bottom sampling or
sampling from streams containing large solids.
The 1/4 inch strainers supplied for use with the 1/4
inch ID suction line have 15/64 inch (0.56 cm) diameter holes. The 3/8 inch strainers supplied for use
with the vinyl or Teflon 3/8 inch ID suction line
have 23/64 inch (0.9 cm) diameter holes.
The Teflon line is attached to the pump tubing by
inserting the line into the pump tubing and securing it with a suitable clamp.
Figure 1 Tube Coupling
Figure 3 Stainless Steel Strainer
Figure 4 CPVC Strainer
Figure 2 Tube Coupling with
Suction Line and Pump Tubing
Intake Placement
The proper placement of the sampler intake
assures the collection of representative samples.
The intake should be placed in the main flow, not
in an eddy or at the edge of flow. The vertical position of the intake in the flow is important. An
intake at the bottom may result in excess heavy
solids and no floating materials, while placement
at the top may result in the opposite.
PLACEMENT OF THE SUCTION
LINE AND INTAKE
Route the suction line from sampler to sampling
point so that it slopes continuously downhill. This
helps drain the suction line when the peristaltic
pump purges the line and minimizes the possibility of cross contamination. When the sampler is
used in near freezing temperatures, thoroughly
draining the suction line minimizes the possibility
of frozen liquid clogging the line.
CONNECTION TO A POWER SOURCE
The 3750 operates from 120 VAC, 60 Hz power
(optionally 240 VAC, 50 Hz). To provide power for
the refrigerator and controller, plug the refrigerator’s line cord into an appropriate source. A 12
VDC power converter, built into the refrigerator,
supplies power to the controller. A 3V lithium battery, with a minimum service life of 5 years, main-
10
3710R/3710VR/3750 Refrigerated Sampler
tains the controller’s real time clock and program
settings when power is disconnected.
The sampler’s controller may be temporarily powered by an external 12 VDC battery when AC
power is not available. Simply disconnect the
power cable shown in Figure 5, and attach the
battery connector to the sampler’s power connector. A rechargeable nickel-cadmium battery is
most commonly used; however, lead acid batteries
are available.
Isco’s nickel-cadmium battery has an operating
capacity of seven standard sampling programs
after an 18-hour charge. (A standard sampling
program is defined to be 24 samples at a rate of
one 200 ml sample per hour, using 10 feet of 3/8
vinyl suction line at a 5-foot head.)
The lead-acid battery has an operating capacity of
11 standard sampling programs. An Isco 120 VAC
Flow Meter Cable
50/60 Hz or 240 VAC 50/60 Hz Power Pack can also
power the sampler. Both power packs may also be
used to recharge the Isco batteries.
CONNECTION TO A FLOW METER OR
FLOW LOGGER
The sampler’s controller must be connected to an
external flow meter or flow logger to permit flow
proportional sampling. This connection is made to
the flow meter connector (shown in Figure 5)
located on the rear of the control base. A small port
is provided on the right side of the control base for
routing the flow meter cable. Refer to Chapter 5
for information on devices to interface the sampler
with non-Isco flow meters.
Figure 5 Flow Meter Cable Connection
and Suction Line Port
Power Cable
Thermostat Knob
Flow Meter
Connector
Suction Line
Port
Control Base
11
3710R/3710VR/3750 Refrigerated Sampler
OPERATION OF THE REFRIGERATOR
2. The refrigerator has been connected to a power
source.
3. The controller has been connected to an external flow meter (if used).
4. The suction line has been attached to the pump
tubing.
5. The weight table shut-off point has been
adjusted as described in Automatic Sampler
Shut-Off on page 12. An empty sample container has been properly located on the weight
table and the pump tube inserted approximately
2 inches into the hole in the container’s lid.
6. The thermostat has been adjusted to the desired
sample temperature.
To operate the refrigerator, turn the thermostat
knob, shown in Figure 5, to the desired sample
temperature. The interior air temperature should
reach the set value within 20 to 30 minutes. The
refrigerator’s thermostat is calibrated in sample
temperature. That is, if the temperature is set at
4oC (39oF), the temperature of the sample after
being in the refrigerator will be 4oC ± 1oC,
although the refrigerator air temperature may
vary more than this due to the nature of the refrigeration cycle.
NOTE
Locking
If the thermostat knob is turned to the lowest setting, the sample may freeze.
After the sampler has been programmed as
desired and the sampling program started, the
cover should be closed and latched in place. Locking holes are provided in the controller cover latch
and on the refrigerator door to accept padlocks to
prevent unauthorized tampering.
Automatic Defrosting
Under normal conditions, you should not need to
defrost the refrigerator manually. The cooling coil
temperature always cycles from below freezing
(when the compressor is running) to above freezing (when the compressor is off) during the normal
refrigeration cycle.
AUTOMATIC SAMPLER SHUT-OFF
The refrigerator has an adjustable, weight activated sample container table to automatically
shut-off the sampling process when the sample
container is filled to a predetermined level. When
the container is filled to the preset level, sampling
stops and the LCD displays alternating messages;
the message, “DONE,” will alternate with the message, “FLOAT/WEIGHT TRIPPED.” Calibrating
the automatic shut-off mechanism requires three
steps. Refer to Figure 6.
If the unit is used in hot, humid conditions, you
may need to defrost the unit after several days of
operation. Turn the thermostat off and allow the
refrigerator to defrost. The refrigerator is
equipped with a water diverting tray and a drain
tube to route defrost water to an evaporating tray
in the rear of the refrigerator. Water in the tray is
evaporated by the warm air from the condensing
system. The refrigerator compressor may not start
immediately when the thermostat is turned on or
turned to a lower setting due to the action of the
compressor overload relay described in Electrical
System on page 75. After a short time, the compressor will start and initiate the cooling cycle.
1. Fill the container with liquid to the desired
shut-off level. Leave at least three inches
unfilled. Place the container in its normal position in the bottom of the refrigerator.
2. If the red CONTAINER FULL lamp on the
outer front of the refrigerator is off, proceed to
step 3. If the lamp is on, turn the black thumbwheel on the front of the weight table to the
right until the lamp goes out.
3. Without touching any portion of the weight
table, carefully turn the black thumbwheel to
the left until the CONTAINER FULL lamp goes
on. The calibration procedure is now complete.
SET UP FOR AUTOMATIC SAMPLING
Before the unit is ready to be set up for automatic
sampling, check that:
1. The control box has been attached to the refrigerator (when necessary).
12
3710R/3710VR/3750 Refrigerated Sampler
Figure 6 Sampler Shut-off Calibration
Thumbwheel
Weight Table
13
Container filled with
desired volume of water
3710R/3710VR/3750 Refrigerated Sampler
14
3710R/3710VR/3750 Refrigerated Sampler
Chapter 3 Programming Guidelines
INTRODUCTION
1. A sample event is initiated when the interval
since the previous sample has expired. For time
based intervals, the samples are taken when the
internal clock reaches the scheduled time of the
sampling event. For flow-paced intervals, the
interval is set to the programmed number of
pulses received from a flow meter; the sample
event begins when the pulses are counted down
to zero.
2. The pump rotates in the reverse direction for
the pre-sample purge. The pre-sample purge is
an air purge of the suction line and inlet which
clears the line of any accumulated debris. It also
serves to purge residual liquid to avoid crosscontamination of samples.
3. The pump direction changes, pumping in the
forward direction to fill the suction line up to
the liquid detector.
4. After the suction line has been filled to the liquid detector and liquid has been detected, the
sample volume measuring portion of the sampling cycle begins. The pump continues to rotate
in the forward direction until the programmed
volume of liquid has been delivered to the sample bottle. (In this manual, the amount of liquid
delivered to the bottle is referred to as the “sample volume.”)
5. The pump direction again changes, pumping in
the reverse direction for the post-sample purge.
Like the pre-sample purge, the post-sample
purge is an air purge of the suction line. After
the post-sample purge, the pump then shuts off.
6. The sample interval is reset and the cycle
begins again at step 1.
This chapter discusses the sampling features of
the 3710R/3710VR Sampler in detail and covers
the procedures used to program the sampler.
We recommend you have a sampler with you when
you read this chapter. The most effective way to
learn how to program the sampler is to read this
chapter, get a sampler, and experiment. A few minutes in the office or laboratory spent in actually
programming the sampler and observing its operation usually proves to be a worthwhile investment
of time.
If you are already familiar with the sampling capabilities of the sampler, you may prefer to begin
with Programming Introduction on page 16.
Chapter Organization
The following topics are discussed in this chapter:
•
•
•
•
•
•
•
•
•
•
•
•
•
Description of Sampling Operations.
Types of Samples.
Programming Introduction.
Operating States.
Introduction to the Programming Procedure.
Using the Keypad to Respond to Displays
Displays.
Programming Examples.
Configure Sequence.
Extended Programming Mode.
Foreign Languages and Metric Units of Measure.
Standby State.
Run State.
DESCRIPTION OF SAMPLING OPERATIONS
This information serves to acquaint you with the
sampler’s operation. It introduces you to the types
of sampling performed by the sampler and the terminology used to describe those capabilities.
TYPES OF SAMPLES
The sampler is designed to collect composite samples. As noted in Chapter 1, the sampler has two
programming modes: basic and extended. The
basic programming mode is used for conventional
routines which include the types of sampling
described in this section. A discussion of the types
of sampling available through the extended programming mode is placed in Types of Sampling
Available Through the Extended Programming
Mode on page 16.
SAMPLE EVENTS AND THE
SAMPLING CYCLE
A sample event is the process of taking a sample. It
includes the full sampling cycle. Although the cycle
varies according to the program settings which
define the sampling routine, the cycle described
here follows the typical sequence. This information
is presented here to provide you with a frame of
reference for the remainder of this chapter.
Composite sampling places individual sample volumes into a single container. Composite sample
types can be characterized by sample pacing. Sample pacing refers to the interval between samples.
15
3710R/3710VR/3750 Refrigerated Sampler
When you use nonuniform times, the time interval
between each sample event is individually programmable. You can enter nonuniform times in two
ways: in minutes or in clock times. The first
method, minutes, allows you to enter the number of
sample events spaced at intervals defined in minutes: 12 samples at 5 minute intervals, 6 samples
at 10 minute intervals, 4 samples at 15 minute
intervals, and so on. You can also enter a specific
clock time and date for each sample event: sample
event 1 at 6:00 on April 20, sample event 2 at 6:30
on April 20, sample event 3 at 7:15 on April 20. You
can specify up to 999 sample events spaced in nonuniform minutes, or up to 99 events specified as
clock times. (If a routine requires a large number of
nonuniform times, you can save the routine with
the program storage feature so that you do not
have to re-enter the nonuniform times again.)
Types of Sample Pacing
There are two types of sample pacing: time-pacing
and flow-pacing. In time-paced sampling, the
interval between samples is a time interval. In
flow-paced sampling, the interval between samples is a certain volume of liquid which has passed
a measuring point in a flow stream. Flow-paced
sampling requires a flow meter. (The sampler can
be interfaced with Isco flow meters and certain
non-Isco flow meters.) The flow meter measures
the flow quantity and sends a pulse for every predetermined flow quantity to the sampler. The sampler totalizes the number of pulses received from
the flow meter and collects a sample when the
total reaches a programmed number.
TYPES OF SAMPLING AVAILABLE
THROUGH THE EXTENDED
PROGRAMMING MODE
Stops and Resumes
The Sampling Stops and Resumes feature, available in the extended programming mode, allows
you to create an intermittent sampling schedule.
You can program the sampler to stop the routine at
a specific time. The routine can then be resumed at
a later time.
The extended programming mode expands the variations of sample pacing. The extended features
listed below are used in more complex sampling routines. Note, however, that the sampling capabilities
described in Types of Samples are available in both
the basic and the extended programming modes.
Up to 12 stop times and 12 resume times can be
entered. Stops and resumes can be used with timepaced and flow-paced routines and with routines
programmed for nonuniform time intervals.
Nonuniform Time Intervals
The sampler, through the extended programming
mode, can pace samples at nonuniform time intervals. With nonuniform time intervals, samples are
taken at irregular intervals, rather than at equal
intervals.
PROGRAMMING INTRODUCTION
The sampler’s programming process is selfprompting. Prompts displayed on the LCD step
you through the programming sequence in a logical order, indicating the needed value or option.
For example, the sampler will prompt you to enter
settings for the interval between samples (select
either time-paced or flow-paced intervals); sample
volume in ml; and other operating controls. These
settings can be changed at any time. The sampler
will accept only appropriate values for the program settings and will reject any unacceptable values. If the unit is turned off or power is
disconnected, the settings are retained in the sampler’s memory by the lithium battery.
Nonuniform time intervals are typically used in
run-off studies, often in conjunction with a Model
1640 Liquid Level Actuator. Nonuniform time
intervals permit a number of samples to be collected at short intervals after a rainfall or other
event occurs and remaining samples to be collected
at widening intervals. For example, when the sampler is used with the actuator in a run-off study,
the actuator turns the sampler on when the liquid
level of the flow stream rises to contact the actuator’s probe. With nonuniform time intervals, the
sampler can collect samples frequently when the
flow rate is highest and less frequently as the flow
rate decreases.
OPERATING STATES
Nonuniform times can also be used to simulate flowpaced sampling. When the flow rate varies predictably, using nonuniform time intervals allows you to
take samples at equal flow volumes. As the flow rate
increases, you can take samples at equal flow volumes by decreasing the time interval. As the flow
rate decreases, you can increase the time interval.
There are three operating states: the standby state
where the sampler is waiting for your instructions,
the run state where the sampler is running a sampling routine, and the interactive state used to program the sampler. Each state serves a different
purpose and is discussed separately.
16
3710R/3710VR/3750 Refrigerated Sampler
STANDBY STATE
clock, calibrate the sampler, or enable the password program protection.
In the standby state, the sampler is waiting for
your instructions. From standby, you can start a
sampling routine, placing the sampler in the run
state. You can also access the interactive state.
The standby state is discussed on page 56.
Programming Modes
The configure sequence also allows you to select
either of the programming modes: basic or
extended. The basic programming mode is used for
conventional sampling routines. Using the basic
programming mode, you can take samples at uniform time intervals or at flow pulse intervals. You
can control the start time of the routine by entering a specific time and date or with the adjustable
start time delay.
RUN STATE
In the run state, the sampling routine is being executed and the sampler is operating under program
control. While the sampling routine is executed,
the LCD displays a number of messages to communicate the progress of the sampler through the routine. It reports the current time for time-paced
routines and the remaining time or pulse count to
the next sample. These messages vary according to
the sampling routine; a representative set of messages is included with the programming examples.
See Basic Programming Procedure on page 24 and
Programming Examples on page 24. Table 9 also
lists run state messages.
Extended Programming
The extended programming mode increases the
number of available features; these features make
more complex sampling routines possible. For
example, you can use nonuniform time intervals,
and create an intermittent sampling schedule with
the Stops and Resumes feature. While all basic
programming features are available in the extending programming mode, the less frequently used
features have been separated into the extended
mode to simplify the programming process.
As the routine progresses, the sampler creates a
log of sampling results that records pertinent information about each sample event. The results
include the time and date of each sample, the number of pump counts occurring until liquid is
detected for each sample event, and any problems
encountered. Results can be retrieved with the Display Status procedure, discussed on page 58. You
can retrieve the results in the middle of a routine
or when the routine is done. The results remain in
the sampler’s memory until you start the sampler
again. More information on the run state can be
found on page 61.
Although the basic and extended program
sequences vary in detail, both can be divided into
three sections: Sample Pacing (interval between
samples), Sample Volume (number of samples and
sample size in ml), and Key Times (start times or,
in the extended mode, stop and resume times).
These sections are noted in the Program Sequence
section of the diagram shown in Figure 7.
Configure Sequence
The program sequence and the configure sequence
are interdependent. The selections you make in the
configure sequence determine what settings will be
available to you in the program sequence. When
you select the extended programming mode, the
program sequence is modified to accommodate the
extended features by adding more input displays.
INTERACTIVE STATE
The interactive state allows you to program the
sampler. The interactive state contains two
branches: the program sequence and the configure
sequence. Figure 7 diagrams the structure of the
interactive state. The program sequence is used to
define the sampling routine; it allows you to enter
the interval between samples, the number of samples, the sample size, and the start time. The configure sequence provides a number of setup
options. Some configure options provide equipment
specifications: bottle sizes, suction line diameters
and lengths, and so on. For example, the sampler
can be used with different sized bottles: 2.5 gallon
or 4 gallon. You must enter the correct bottle size
so that the sampler can calculate the range of sample volumes for a given number of samples. This
information is used to prevent overfilling. Other
options allow you to set the sampler’s real time
The extended programming mode not only extends
the number of features available in the program
sequence, it extends the number of configure
options. When you select extended programming,
for example, you can enable the Sampling Stop
and Resumes and/or Nonuniform Times features
so they can be used in the extended program
sequence. When you select the basic programming
mode, these configure options are not available to
you. As in the programming sequence, less frequently used options have been separated to simplify the configuration process.
17
3710R/3710VR/3750 Refrigerated Sampler
changes significantly. The sampler is always programmed and configured: program and configure
settings are maintained by the sampler’s internal
battery. In fact, the sampler is shipped with factory program and configure settings. It is configured for the basic program mode and for the bottle
and suction line ordered with the sampler. For
more information on factory settings, refer to Run
Diagnostics on page 42, and Tables 7 and 8.
Most configure options are available to both programming modes. The configure sequence options
are summarized in Table 4; each option is marked
as available in both modes or available only in the
extended mode. A detailed discussion of each configuration option is found in Set Clock on page 34
through Exit Configuration on page 42.
It is usually not necessary to change the configure
option settings unless the sampling application
Figure 7 Interactive State Structure
. . . STANDBY . . .
9:50:34
11-JUN-91
Display #1
Program
[PROGRAM, CONFIGURE]
Configure
SAMPLER
CONFIGURE SEQUENCE
PROGRAM SEQUENCE
Set Clock
Bottle Size
Suction Line
Liquid Detector
Programming Mode
* Load Stored Program
* Save Stored Program
* Flow Mode Sampling
* Nonuniform Time
Calibrate Sampler
* Sampling Stop/Resume
Start Time Delay
Enable Pin
Event Mark
Purge Counts
Tubing Life
Program Lock
Sampler ID
Run Diagnostics
Exit Configuration
Sample Pacing
Sample Volumes and Suction Head
Key Times
PROGRAMMING SEQUENCE
COMPLETE
* Indicates Extended
Programming Mode
. . . STANDBY . . .
9:54:40
11-JUN-91
18
3710R/3710VR/3750 Refrigerated Sampler
Table 4 Configure Option Functions
Basic
Extended
Availability
Set Clock
✔
✔
Sets the sampler’s real time clock.
Bottle Size
✔
✔
Sets the sampler for portable or refrigerated configuration. Sets the
size of the composite bottle.
Suction Line
✔
✔
Sets the type of line (vinyl or Teflon), line diameter (1/4- or 3/8-inch), and
line length (3 to 99 ft).
Liquid Detector
✔
✔
Enables/disables liquid detector, sets the number of rinse cycles (0 to 3),
enables/disables the suction head entry, and sets the number of sampling retries (0 to 3).
Programming Mode
✔
✔
Sets the programming mode: basic or extended.
Load Stored Program
✔
Loads one of up to three previously saved sampling programs.
Save Current Program
✔
Saves current sampling program.
Flow Mode Sampling
✔
Directs sampler to take a sample at the beginning of a flow-paced program.
Nonuniform Time
✔
Directs sampler to accept nonuniform intervals as specific clock times
or in minutes.
✔
Enables/disables the calibration sequence.
✔
Enables/disables Sampling Stops and Resumes feature.
✔
Sets the start time delay (from 0 to 9999 minutes). If no specific start
time is entered in the program sequence, the program will use the
entered start time delay. The delay is the amount of time which will
elapse after the START SAMPLING key is pressed or after the sampler is
enabled.
Configure Option
Calibrate Sampler
✔
Sampling Stop/Resume
Start Time Delay
✔
Function
Enable Pin
✔
✔
Enables/disables the master/slave sampling. Directs the sampler to
take a sample when disabled and/or enabled by an Isco Flow Meter or
Liquid Level Actuator. Allows you to restart the sampling interval
when the sampler is enabled.
Event Mark
✔
✔
Allows you to select one of four types of event marks.
Purge Counts
✔
✔
Adjusts the number of pre-sample and post-sample purge counts.
Tubing Life
✔
✔
Displays the pump tubing life information. Resets the tubing life count.
Program Lock
✔
✔
Enables/disables the password protection for input displays.
Sampler ID
✔
✔
Allows you to enter a 10 character ID number for the sampler.
Run Diagnostics
✔
✔
Tests the RAM, ROM, and pump. Allows for re-initialization of certain
program and configure settings.
19
3710R/3710VR/3750 Refrigerated Sampler
INTRODUCTION TO THE
PROGRAMMING PROCEDURE
USING THE KEYPAD TO
RESPOND TO DISPLAYS
The procedure used to program the sampler follows
the steps listed below. Note: Because the configuration settings determine portions of the program
sequence and affect the accuracy of the sample, check
the configuration settings before programming.
Configuring and programming the sampler is as
simple as responding to displays on the LCD with
the keypad. The sampler will prompt you through
many of the entries by presenting a question or a
choice on the display. You must respond with the
keypad. The LCD and the keypad are located on the
sampler control panel, shown in Figure 8.
1. Determine the equipment you will be using with
the sampler. You will need to know the capacity
of the bottle, and the inside diameter, type
(vinyl or Teflon), and length of the suction line.
You will need this information when you verify
and revise the configuration settings in step 2.
2. Check the configuration settings. From standby,
access the interactive state. Select the configure
sequence. Check the configuration settings,
revising any settings as needed; select basic or
extended programming mode. Return to the
standby state.
A summary of each key’s function can be found on
page 20. For a discussion of the displays presented
on the LCD and the way you can use the keypad to
interact with the sampler, see page 21.
KEYPAD DESCRIPTION
Keys are grouped together on the control panel to
assist you in identifying related functions. Control
keys are used to manually control the sampler;
numeric keys are used to enter program values;
programming keys are used to monitor the sampler’s status and direct programming activities. In
this manual, individual keys are indicated in
SMALL CAPITAL LETTERS.
Example 1 shows you how to check and revise
the configuration settings in the configure
sequence. (We recommend you review Keypad
Description on page 20 and Displays on page 21
before you work through the programming
examples. These sections discuss the functions
of the individual keys and how to use the keys
when programming the sampler.)
3. Program the sampler. Again, from standby,
access the interactive state. Select the program
sequence. Enter the program settings for your
routine. The sampler will prompt you through
the programming process. When the process is
completed, the sampler will automatically
return to standby.
The individual key switches that make up the keypad provide tactile and audible feedback to assure
you that the key switch has been successfully actuated. When a key switch is pressed, you can feel
the deflection of the spring member in the switch;
an audio indicator inside the sampler will beep
once. The sampler has a 10-keystroke buffer
which, in some cases, allows you to “type ahead” of
the display.
Control Keys
Control keys allow you to turn the sampler on or
off, start or resume the currently entered program,
and control the sampler manually. The functions of
the control keys are listed below
A more detailed discussion of the programming
procedure is on page 24. Examples 2 through 4
demonstrate several types of sampling programs in the basic mode. Extended mode sampling programs can be found in Examples 7
through 10.
4. If desired, connect the sampler to a flow meter
or other interfacing equipment. Start the sampler. As the routine is executed, the displays will
report the sampler’s progress. The programming examples in this manual conclude with
the run state displays you should see for each
sampling routine. When the routine is done, the
sampler will return to standby.
5. Retrieve the filled sample bottle. If desired, use
the Display Status procedure discussed on page 58
to examine the sampler’s log of sampling results.
6. If you need to reprogram the sampler, follow
this procedure from the beginning. If the sampler’s current program is correct, start the sampling routine again.
ON/OFF - Pressing the ON/OFF key when the sampler is off will turn the sampler on, reactivate the
display, and place the sampler in the standby
state. Pressing the ON/OFF key (when the sampler
is on) will halt all sampling activity and will clear
the display.
PUMP FORWARD - While in the standby state,
pressing the PUMP FORWARD key will cause the
pump to run continuously in the forward direction.
The pump will run until the STOP key is pressed.
PUMP REVERSE - While in the standby state,
pressing the PUMP REVERSE key will run the pump
continuously in reverse. The pump will run until
the STOP key is pressed.
20
3710R/3710VR/3750 Refrigerated Sampler
LEFT ARROW - The LEFT ARROW key is used to
select one of two or more program options displayed when the sampler is in the interactive
state. When more than one numeric entry is displayed – for example, the hours and minutes of a
time setting – the LEFT ARROW can be used to step
back to a previously entered value. When entering
a number, the LEFT ARROW can be used to erase the
most recently entered digit. It is also used to step
through display status information and configure
option list.
STOP - The STOP key will stop the pump any time
it is running. When the STOP key is pressed in the
run state, the sampling routine will be halted, the
sampler will be transferred to the standby state,
and the “PROGRAM HALTED” message will be displayed. Pressing the STOP key while in the interactive state will access the display’s reference number.
START SAMPLING - When in the standby state,
pressing the START SAMPLING key will begin the
sampling program. When entering a sampler ID,
the key will type a space.
RESUME SAMPLING - When “PROGRAM
HALTED” is displayed, pressing the RESUME SAMPLING key will cause the sampler to continue with
the current sample program at the point at which
it was halted. When entering a sampler ID, the
key will type a period.
RIGHT ARROW - The RIGHT ARROW key is used
to select one of two or more program options displayed in an input display. It is also used to step
through display status information and configure
option list.
MANUAL SAMPLE - Pressing the MANUAL SAMkey will allow you to take a manual sample.
The MANUAL SAMPLE key is valid in the standby
state, the run state, and when calibrating the sampler. When entering a sampler ID, the key will
type a dash (-).
DISPLAYS
There are two types of displays: displays which communicate information about the sampler’s status
and displays which request input. In many cases,
you must respond to a display with the keypad.
Program Keys
Informational Displays
The four program keys are used to enter program
settings. Each key’s function is listed below.
Informational displays communicate information
about the sampler’s status. For example, when the
sampler completes a sampling program, a display
similar to the illustration below appears. It communicates the sampler’s status (“DONE”), the
number of samples taken (which will vary according to the program), and the current time and date.
PLE
DISPLAY STATUS - While the sampler is in the
standby or run state, pressing the DISPLAY STATUS
key will allow you to view the program settings or
the sampling results.
EXIT PROGRAM - Pressing the EXIT PROGRAM
key while in the program sequence will return the
sampler to standby. Pressing the EXIT PROGRAM key
while in the run state will halt the program; the
message “PROGRAM HALTED” will be displayed.
DONE . . . 48 SAMPLES
10:32:34
14-JUN-91
Input Displays
Input displays can be identified easily because
they contain a blinking word or number. The blinking word or number serves as a prompt for input
and is said to be “selected.” When the input displays shown below first appear, the word “PROGRAM” (display a) and the sample volume entry
“250” (display b) will be blinking. Blinking words
or numbers are represented in illustrations of displays with Italic characters.
CLEAR ENTRY - When entering a number, the
CLEAR ENTRY key can be used to return to the original entry.
ENTER/PROGRAM - Pressing the ENTER/PROGRAM key, while in the standby state, will cause the
sampler to enter the interactive state. While at an
input display, pressing the ENTER/PROGRAM key will
accept an entered value or a blinking option and
direct the sampler to proceed to the next step. Input
displays are discussed on page 21.
Numeric Keys
The numeric keys consist of 10 digit keys, a LEFT
ARROW key, and a RIGHT ARROW key. The digit keys
are used to enter quantities. The arrow keys are
used to move through the configure option list or
program options.
21
[PROGRAM, CONFIGURE]
SAMPLER
a
SAMPLES VOLUMES OF
250 ml EACH (10 - 990)
b
3710R/3710VR/3750 Refrigerated Sampler
Figure 8 3710R/3710VR Sampler Control Panel
22
3710R/3710VR/3750 Refrigerated Sampler
the next step. To enter a new number, press the
appropriate numeric keys, then press the ENTER/
PROGRAM key.
Display Numbers
Nearly all input displays have a number assigned
to them. The number is used to cross reference the
input displays with a explanatory listing found in
Appendix A - Display Index or in the 3710R/
3710VR/3710FR Refrigerated Sampler Pocket
Guide. If you have a question about a given input
display, you can easily locate the description of the
display.
The sampler will not accept a number that exceeds
the allowable range of values placed in parentheses on the display. In illustration b, no less than 10
ml and no more than 990 ml can be entered as a
sample volume. If an entered number exceeds the
range, the sampler will emit a series of beeps and
the original number will reappear. An acceptable
value must be entered to advance to the next step.
The display number can be accessed by pressing
the STOP key when viewing the input display. To
see the display number, press the STOP key, read
the number from the display, then look up the corresponding number in Display Index on page 99 for
information on that display. The display number
for display a (above) is “1.”
Editing Numbers
The left arrow key and clear entry key can be used
to edit numeric entries if they are used after you
press a numeric key and before you press the
enter/program key. The clear entry key will clear
any typed number and the original number will reappear. The LEFT ARROW will erase the most
recently typed number.
Displays with Choices
There are two types of input displays: displays
which prompt you to make a choice (between timepaced and flow-paced sampling, for example) and
displays which prompt for numeric input (sample
volume, for example). In displays which prompt
you to make a choice, you must select one of up to
four alternatives placed in brackets. Display a
(above) prompts you to select the program or the
configure sequence. The choices, “PROGRAM” and
“CONFIGURE,” are placed in brackets.
Some numeric input displays prompt for more
than one value. In the illustration below, the
prompt asks for five number entries: hours, minutes, day, month, and year. The LEFT ARROW key
and RIGHT ARROW key can be used to move back
and forth between each of the five entries. Individual entries can be changed, as discussed above.
Pressing the RIGHT ARROW or ENTER/PROGRAM key
on the last entry will store the values and advance
to the next display.
When an input display prompting for a choice first
appears, the blinking word indicates the currently
selected choice. If the blinking word is acceptable,
press the ENTER/PROGRAM key. If the blinking word
is not acceptable, select the preferred choice by
pressing the LEFT ARROW or RIGHT ARROW key until
the preferred choice is blinking; then press the
ENTER/PROGRAM key. The sampler will store the
selected choice and advance to the next step.
HH:MM
12:33
DD-MM-YY
14-06-91
Military Times
Times must be entered in military format: to set
the sampler’s clock to 3:30 PM, enter a time of
15:30. When the display above first appears, the
first two digits, “12,” will blink. To enter a new
time, type in the new hour: “15.” Store the hour
entry and advance to minutes by pressing the
ENTER/PROGRAM key. If the month or year entry
does not need to be changed, accept the entry by
pressing the RIGHT ARROW or ENTER/PROGRAM key.
The LEFT ARROW key can be used to return to a
previous position. Pressing the RIGHT ARROW or
ENTER/PROGRAM key on the last entry, “91,” will
store the value and advance to the next display.
When the display illustrated in a appears, the
word “PROGRAM” will be blinking. If “PROGRAM” is acceptable, press the ENTER/PROGRAM
key. If “PROGRAM” is not acceptable, press the
LEFT ARROW or RIGHT ARROW key until “CONFIGURE” is blinking. Then, press the ENTER/PROGRAM
key. The ENTER/PROGRAM key directs the sampler
to advance to the next step.
Numeric Input Displays
A numeric input display will prompt for input by
blinking the currently stored number. (In the display illustrated in b, the number “250” will blink to
prompt you to enter a value.) If the blinking number is acceptable, it is not necessary to type the
number again: pressing the ENTER/PROGRAM key
will store the number and advance the program to
Exit Program Key
The user can exit an input display by pressing the
key. If you use the EXIT PROGRAM
key, the currently stored setting will not change.
EXIT PROGRAM
23
3710R/3710VR/3750 Refrigerated Sampler
PROGRAMMING EXAMPLES
Most program and configure settings can be re-initialized to factory settings, if desired. Tables 7 and
8 list factory settings. A discussion of the re-initialize option, located in the Run Diagnostics configure option is found on page 42. Instructions for
re-initializing the sampler are also included as
part of Example 1.
The following examples demonstrate the steps used
to check the configure option settings and program
the sampler for several different sampling routines.
The programming examples in this manual present
each display in the order in which they appear on
the sampler. They are designed to provide you with
step-by-step procedures and are provided as models
for you to use later when programming the sampler
for your “real” applications. Each programming
example concludes with the run state displays that
appear while that routine is being executed. The
run state displays can be used to monitor the sampler’s progress through a routine.
BASIC PROGRAMMING PROCEDURE
The steps needed to program the sampler in the
basic mode follow the procedure outlined below.
1. Turn the sampler on with the ON/OFF key. The
sampler always “wakes up” in the standby state.
The “STANDBY” message will appear. If the
sampler were turned off while running a routine, the “PROGRAM HALTED” message will be
displayed. Both messages indicate the sampler
is in standby.
2. Press the ENTER/PROGRAM key to access the
interactive state. Select “PROGRAM.” Refer to
Figure 9 for displays noted in steps 3 - 6.
There are two sets of examples. Examples for the
basic programming sequence are provided in
Examples 2 through 4. Because many of the features of the extended programming mode are
affected by selections made in the configure
sequence, examples for the extended programming
sequence follow Configure Sequence on page 33.
This section discusses each configure option separately. We recommend you become familiar with
the basic programming mode procedure and examples before using the extended programming
mode. Most of the procedures used in the extended
programming mode duplicate those of the basic
programming mode and are not repeated in the
section on extended programming procedures.
To return to a previous display when programming the sampler, press the EXIT PROGRAM key.
The sampler will return to standby. Press the
ENTER/PROGRAM key again to re-enter the interactive state. Continue to press the ENTER/PROGRAM key to scroll through the displays until
you locate the display in question.
3. Enter the Sample Pacing settings. The sampler
will prompt you to select either time- or flowpacing. Depending on your selection, you will
then be prompted to enter the time or flow pulse
interval between samples.
Examples for both programming modes are accompanied by flow charts. These charts diagram the
program sequence structure for each mode. Figure
9 charts the Basic Programming Mode structure.
Figure 11 on page 46 charts the structure of the
Extended Programming Mode. The charts are provided to act as a “map” to the programming process. Both charts are divided into sections – Sample
Pacing, Sample Volume, and Key Times –which
correspond to the steps listed in the procedure discussed below. Each chart contains the input displays used in the sequence. The input displays on
each chart are labeled with their display number so
they can be cross-referenced with the listing found
in Display Index on page 99.
Note: If you will be using very short sample
intervals, be sure the interval is longer than the
duration of the sampling cycle. For truly representative sampling, the interval in either timeor flow-paced sampling should be longer than
the duration of the sampling cycle. If the intervals are too short, no sample events will be
missed, although some events will occur at
improper times. The duration of the cycle can be
determined by programming the sampler with
the desired settings, pressing the MANUAL SAMPLE key, and simply timing the cycle.
As noted earlier, the sampler is shipped with a test
program and factory configuration settings. The
examples in this manual assume that all factory
settings are being used, that the sampler will use a
2.5 gallon (9400 ml) container and a 10 foot length
of 3/8 inch vinyl suction line. The settings shipped
with your sampler include settings for the size of
bottle ordered and for the size, type, and length of
suction line. When you check the configuration settings, make sure the settings match your equipment, not the example.
When programming the sampler for flow pacing, you must enter the number of pulses that
make up the flow interval. If the flow meter has
been set to send a pulse once every 1000 gallons,
you can program the sampler to collect a sample
once every 1000 gallons by entering a flow pulse
interval of “1.” To collect a sample once every
50,000 gallons, you would enter a sample interval of 50 pulses.
24
3710R/3710VR/3750 Refrigerated Sampler
Figure 9 Basic Programming Mode:
Program Sequence Structure
. . . STANDBY . . .
9:50:34
11-JUN-91
Display #1
[PROGRAM, CONFIGURE]
SAMPLER
Configure
Program
Sample Pacing
Display #10
[TIME, FLOW]
PACED SAMPLING
Time
Flow
Display #22
Display #21
SAMPLE EVERY
-- HOURS -- MINUTES
SAMPLE EVERY
---- PULSES (1 - 9999)
Sample Volume
Display #60
-- COMPOSITE
SAMPLES (0-MAX))
Display #50
SAMPLE VOLUMES OF
--- ml (1-MAX)
Display #70
SUCTION HEAD OF
-- FEET (1-MAX)
See Liquid Detector configure option
in Chapter 3.
Display #80
CALIBRATE SAMPLE
VOLUME? [YES, NO]
See Calibration Procedure Example
in Chapter 3.
Display #90
Key Times
Yes
ENTER START TIME?
[YES, NO]
Flow
Time
Display #92
Display #91
TAKE FIRST SAMPLE AT
HH:MM DD-MMM
START FLOW COUNT AT
HH:MM DD-MMM
. . . STANDBY . . .
9:54:22
11-JUN-91
25
No
3710R/3710VR/3750 Refrigerated Sampler
Calibration Settings
Calculating Flow Increment Between Samples
on page 105 provides a discussion of some of the
calculations needed when determining flow
pulse intervals.
4. Enter the Sample Volume settings. The Sample
Volume program section will always contain
prompts for the number of samples and sample
volume. Depending on the selections made in
the configure sequence, it may also contain
prompts for the suction head and for calibrating
the sampler.
If you want to calibrate the sample volume, the
calibration option must be enabled. To enable this
option, select “ENABLE” in the Calibrate Sampler
configure option. (Refer to Calibrate Sampler on
page 39.) Enabling the option will add the calibration displays to the Sample Volume program section. The calibration displays are included in
Example 4.
1. Enter the Key Times settings. In the basic programming mode, you will be asked if you want
to enter a start time for the routine. If you select
“YES,” you will be prompted to enter a specific
start time and date. If you select “NO,” the sampler will use the start time delay. The start time
delay can be set from 0 to 9999 minutes in the
Start Time Delay configure option. (See Start
Time Delay on page 39.) When you select “NO,”
the routine will start according to the delay setting in the Start Time Delay configure option.
The time remaining between the time you press
the START SAMPLING key and the next full
minute will pass before beginning the delay
countdown. In other words, with a start time
delay of one minute, if you press the START SAMPLING key at 10:05:30, the routine will begin the
one minute countdown at 10:05:00 and start the
routine at 10:06:00.
Sample Volume
The first display of the Sample Volume section,
display #60, prompts you for the number of samples you want deposited in the bottle. Displays are
shown in Figure 9. The acceptable range for number of samples is 0 to 999; the range is determined
by the bottle size entered in the Bottle Size configure option. Enter 0 if you want the sampler to take
samples indefinitely until the weight table terminates the sampling. If you enter a number greater
than zero, the sampler will take samples until it
has deposited that number of samples or the
weight table terminates the sampling. The next
display prompts you for the sample volume and
indicates the range of acceptable volumes. The
maximum range of sample volumes is dependent
on the number of samples entered in the previous
display; it will never exceed 9990 ml.
When the sampler is operating under factory
configuration settings and running a time-paced
program, the first sample will be taken at the
start time for time-paced sampling. This is true
whether you enter a specific start time and
date, or if you use the start time delay.
When entering the sample volume, the ± 10 ml
sample volume repeatability should be kept in
mind. Because the entered volume is a “nominal”
value, it is prudent to calculate a total sample volume that is somewhat less than the volumetric
capacity of the bottle as a safety factor. This will
minimize the effects of cumulative error. Refer to
Bottle Size on page 34 for notes on cumulative
error and bottle size.
For flow-paced sampling, however, the flow
pulse countdown will begin at the start time
and the first sample will be taken when the
countdown reaches zero. Refer to the discussion
on the Flow Mode option in Nonuniform Time
on page 39 for additional information.
2. The sampler will automatically be returned to
standby state.
3. From standby, start the routine by pressing the
START SAMPLING key. This places the sampler
into the run state. If you happen to start the routine after the programmed start time, the sampler will allow you to reprogram the start time.
4. Use the run state displays to monitor the sampler’s progress.
If you will be using a preservative in the sample
bottle, be sure to take the volume of the preservative into account.
Suction Head
The sampler can be configured, through the Liquid
Detector configure option, to add the suction head
setting to the program sequence. The suction head
display will appear after you enter the sample volume. However, when the head is unknown or variable, the suction head setting should be omitted by
disabling the suction head setting in the Liquid
Detector configure option. By disabling the setting,
you allow the liquid detector to determine the operating suction head each time a sample is taken.
26
3710R/3710VR/3750 Refrigerated Sampler
Example 1 Checking the Configure Option Settings
Before programming the sampler – especially if you are unfamiliar with the settings used in the previous
routine, or if you think the settings have been changed – verify the configure option settings. You must
change the settings if they do not match your bottle size or the suction line used with your unit. Entries
suggested in this example configure the sampler for the 2.5 gallon (9400 ml) container and a 10 foot length
of 3/8 inch vinyl suction line, enable the liquid detector, and select the basic programming mode. Procedures
for re-initializing the program settings and configure options to factory settings are placed in steps 21
through 26.
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:34:50 14-JUN-91
If the sampler is not already on, press the ON/OFF key to turn it on. The
standby display shown here will appear. Press the ENTER/PROGRAM key to
access the interactive state. The next display you’ll see is shown in step 2.
2
[PROGRAM, CONFIGURE]
SAMPLER
Access the configure sequence by selecting “CONFIGURE.” Select “CONFIGURE” by pressing the RIGHT ARROW key once. When “CONFIGURE”
blinks, accept the selection by pressing the ENTER/PROGRAM key.
3
SELECT OPTION: (← →)
SET CLOCK
The first option displayed is the Set Clock configure option. If the time displayed on the LCD in the standby message is not correct, reset the time
with the Set Clock configure option. Access the Set Clock input display by
pressing the ENTER/PROGRAM key.
4
HH:MM
10:35
DD-MM-YY
14-06-91
Use this display to reset the time. Five entries are required. The LEFT
and RIGHT ARROW keys can be used to move back and forth between
each of the five entries. Use the arrow keys until the entry you want to
change blinks. Type in the new time or date; press the ENTER/PROGRAM key
to accept it. Pressing the RIGHT ARROW or ENTER/PROGRAM key on the last
entry will store the values and advance to the next display.
5
SELECT OPTION: (← →)
BOTTLE SIZE
To verify the Bottle Size settings, press the ENTER/PROGRAM key. The display shown in step 6 will appear.
6
[PORTABLE, REFRIG.]
SAMPLER
Select “REFRIG.” Isco 3700 Series portable and refrigerated samplers use
the same controller. You would not need to select “PORTABLE” unless you
moved the controller to a portable sampler.
7
BOTTLE VOLUME IS
9400 ml
Enter the bottle size here. Enter “9400” for the 2.5 gallon bottles, “15000”
for 4 gallon bottle. Press the ENTER/PROGRAM key.
If you enter a number that exceeds the maximum standard bottle size
(15000), the message, “WARNING: STANDARD BTL VOLUME
EXCEEDED!”, will be displayed for a short time. The sampler will then
prompt you to confirm the volume entered. This prompt is displayed in step 7.
8
15001 ml! . . . ARE YOU
SURE? [YES, NO]
Select “YES” if you want to use the non-standard bottle volume. Select
“NO” if you want to revise the entry. The display shown in step 7 will reappear; use it to enter the revised bottle volume. Press the ENTER/PROGRAM
key to accept the entry and advance to step 9.
9
SELECT OPTION: (← →)
SUCTION LINE
Press the ENTER/PROGRAM key at this display to access the Suction Line
input displays shown in steps 10 - 12.
ARROW
27
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
10
SUCTION LINE ID IS
[1/4, 3/8] INCH
Select “1/4” if you are using 1/4 i n c h suction line, “3/8” if you are using 3/8
inch suction line. Press the ENTER/PROGRAM key to accept the selection. If
you select “1/4,” you will not see the display shown in step 11; instead you
will be prompted for the suction line length, as shown in step 12. (1/4 inch
suction line is only available in vinyl, so you do not need to specify the line
type.)
11
SUCTION LINE IS
[VINYL, TEFLON]
This display appears when you have selected “3/8” in step 10. Select
“VINYL” if you are using vinyl suction line, “TEFLON” if you are using
Teflon suction line. Press the ENTER/PROGRAM key to accept the selection.
12
SUCTION LINE LENGTH
IS 10 FEET (3 - 99)
Enter the length of the suction line. The length should not include the tube
coupling or the strainer. Press the ENTER/PROGRAM key to accept the entry
and move to step 13.
If you change the suction line settings, the “. . . CALCULATING . . . PUMP
TABLE VALUES” message will appear for a short time.
13
SELECT OPTION: (← →)
LIQUID DETECTOR
Press the ENTER/PROGRAM key at this display to access the Liquid Detector
input displays shown in steps 14 - 17.
14
[ENABLE, DISABLE]
LIQUID DETECTOR
Select “ENABLE” to turn the Liquid Detector on, “DISABLE” to turn the
Liquid Detector off. For the purposes of the following examples, select
“ENABLE.” Press the ENTER/PROGRAM key to accept the selection. The
detector should normally be left enabled unless you suspect it is malfunctioning. If you disable the detector, you will be required to enter the suction
head in the program sequence.
0 RINSE CYCLES (0 - 3)
This display appears when you have selected “ENABLE” in step 14. For the
purposes of this example, enter “0.” Press the ENTER/PROGRAM key to
accept the entry. Rinse cycles condition the suction line to reduce cross contamination.
16
ENTER HEAD MANUALLY?
[YES, NO]
This display appears when you have selected “ENABLE” in step 14. For the
purposes of the following examples, select “NO” to omit the setting. Press
the ENTER/PROGRAM key to accept the selection.
17
RETRY UP TO 0 TIMES
WHEN SAMPLING (0 - 3)
This display appears when you have selected “ENABLE” in step 14. For the
purposes of this example, set the number of retries to “0.” Press the ENTER/
PROGRAM key to accept the entry. This setting determines the number of
times the sampler will try to detect the presence of liquid for each sample
event.
18
SELECT OPTION: (← →)
PROGRAMMING MODE
To verify the programming mode setting, press the ENTER/PROGRAM key.
19
[BASIC, EXTENDED]
PROGRAMMING MODE
Select “BASIC.” Press the ENTER/PROGRAM key to accept the selection.
20
↓
↓
15
Scroll through the remaining options with the arrow keys. Use the techniques demonstrated above to change or verify the settings. If you want to
re-initialize the configure and program settings to factory settings, follow
the procedures given in steps 21 - 26.
28
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
21
SELECT OPTION: (← →)
RUN DIAGNOSTICS
To access the displays press the ENTER/PROGRAM key. The displays illustrated in steps 22 - 25 require no response. A discussion of the Run Diagnostics configure option is on page 42.
22
SOFTWARE REVISION
#4.5
23
'RAM' PASSED TEST
TESTING 'ROM'
The software revision display will be replaced by the RAM and ROM test
messages. A successful test is indicated by the messages “RAM PASSED
TEST” and “ROM PASSED TEST.”
24
ABCDEFGHIJKLMNOPQRST
UVWXYZ[¥]^_`abcdefgh
After successful RAM and ROM tests, the sampler will then test the LCD
by first filling the display with solid rectangles and then printing the
alphabet and other characters. Each character position in the display
should contain a character.
25
PUMP COUNT TEST
OFF/ON = 105
The next step tests the pump. During the test, the pump will run briefly
and the display will indicate an “OFF/ON” number. The number should fall
within the range of 50 to 200. A count near 100 is typical.
26
RE-INITIALIZE?
[YES, NO]
If you want to re-initialize the settings, select “YES.” The entire RAM –
with the exception of the current pump count total, bottle size settings,
suction line settings, and sampler ID – will be re-initialized to factory settings. The sampler will automatically turn itself off as part of the re-initialization process. Select “NO” if you do not want to re-initialize the settings.
Press the ENTER/PROGRAM key to accept the selection.
The sampler will display the software revision number for a short period.
Example 2 Time-paced Sampling
The steps in this example program the sampler to take 250 ml samples every 15 minutes for a six hour
period of time. The sampling routine is to start at 6:00 am.
When entering the program settings, you must enter the number of samples required before entering the
sample volume. At four samples per hour, the 6 hour period would yield 24 samples. The total sample volume collected at the end of the routine would be 6000 ml (24 samples x 250 ml/sample), well within the
capacity of the 9400 ml (2.5 gallon) bottle.
Step
No.
Display
Procedure
1
. . . STANDBY . . .
5:34:50 14-JUN-91
If the sampler is not already on, press the ON/OFF key to turn it on. The
standby display shown here will appear. Press ENTER/PROGRAM to access
the interactive state.
2
[PROGRAM, CONFIGURE]
SAMPLER
Access the program sequence by selecting “PROGRAM.” Because “PROGRAM” will already be selected (blinking), press the ENTER/PROGRAM key
to accept it and move to the next step.
3
[TIME, FLOW]
PACED SAMPLING
To enter the interval between samples in time increments, select “TIME.”
If “TIME” is already blinking, press the ENTER/PROGRAM key to accept the
selection. If “FLOW” is blinking, press the LEFT ARROW key once so that
“TIME” blinks. Then, press the ENTER/PROGRAM key to accept “TIME.”
4
SAMPLE EVERY
0 HOURS, 1 MINUTES
This display requires two entries: one for the hours, one for the minutes.
Enter “0” to set the hours at zero. Press ENTER/PROGRAM to accept the number “0” and move to the minutes entry shown in step 5.
29
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
5
SAMPLE EVERY
0 HOURS, 15 MINUTES
Enter “15” to set the minutes entry to 15. Press ENTER/PROGRAM to accept
the entry.
6
24 COMPOSITE
SAMPLES ( 0-470)
Enter the number of samples to be collected: “24.” Press ENTER/PROGRAM to
accept the entry.
7
SAMPLE VOLUMES OF
250 ml (10 - 1000)
Enter the sample volume: “250.” Press ENTER/PROGRAM to accept the entry.
8
ENTER START TIME?
[YES, NO]
9
TAKE FIRST SAMPLE AT
6:00
14-JUN
10
PROGRAMMING SEQUENCE
COMPLETE
After this message is displayed briefly, the sampler will automatically
return to the standby state.
11
. . . STANDBY . . .
5:38:50 14-JUN-91
After the sampler is properly installed, press the START SAMPLING key to
run the program.
Run State Displays
Comment
SAMPLE 1 OF 24
AT 6:00
5:39:43
The first line of this display indicates the number of the upcoming sample
event and the total number of programmed samples. The second line indicates the scheduled time of the upcoming event followed by the current time.
SAMPLE 1 OF 24
When the time to the next sample event has elapsed and the sampler has
initiated the sample event, the sampling cycle begins. When the pump
reverses for the pre-sample purge, the second line disappears.
SAMPLE 1 OF 24
PUMPING 250 ml
At the end of the pre-sample purge, the pump runs forward to deliver the
sample, and the second line appears on the display. This display remains
through the end of the post-sample purge.
SAMPLE 2 OF 24
AT 6:15
6:00:33
At the end of the sample event, the display changes to indicate the number
and time of the next event. The current time is reported in the lower right corner.
12
13
14
15
SAMPLE 2 OF 24
Select “YES” to enter the start time for the routine.
Enter the start time and date: 6:00 on June 14.
The cycle is repeated for the remainder of the sampling routine.
SAMPLE 2 OF 24
PUMPING 250 ml
↓
↓
16
17
DONE . . .
12:10:35
24 SAMPLES
14-JUN-91
This display appears when the routine is completed. It reports the status of
the routine (“DONE”), the total number of sample events, and the current
time and date.
30
3710R/3710VR/3750 Refrigerated Sampler
Example 3 Flow-paced Sampling
The steps in this example program the sampler to take 24, 250 ml samples at a flow-pulse interval of 10
pulses. The sampling routine is to start according to the start time delay. A discussion of the calculations
needed to determine the estimated time interval of flow-paced samples, the number of flow pulses, and sample volume can be found in Calculating Flow Increment Between Samples on page 105.
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:38:50 14-JUN-91
2
[PROGRAM, CONFIGURE]
SAMPLER
3
[TIME, FLOW]
PACED SAMPLING
4
SAMPLE EVERY
10 PULSES (1 - 9999)
5
24 COMPOSITE
SAMPLES ( 0-470)
6
SAMPLE VOLUMES OF
250 ml (10 - 1000)
7
ENTER START TIME?
[YES, NO]
8
PROGRAMMING SEQUENCE
COMPLETE
After this message is displayed briefly, the sampler will automatically
return to the standby state.
9
. . . STANDBY . . .
10:40:23 14-JUN-91
After the sampler is properly installed, press the START SAMPLING key to
run the program.
Run State Displays
Comment
10
START AT 10:42
14-JUN
10:40:35
14-JUN-91
Press the ENTER/PROGRAM key to reenter the interactive state.
Access the program sequence by selecting “PROGRAM.”
Select “FLOW.”
Enter “10” to set the pulse interval to 10 pulses. (Note: An entry of “0” will
instruct the sampler to take samples until the weight table terminates the
sampling routine.)
Enter the number of samples to be collected: “24.”
Enter the sample volume: “250.”
Select “NO” to use the start time delay set in the configure sequence.
This display appears during the start time delay countdown.
11
SAMPLE
AFTER
1 OF 24
10 PULSES
The first line of this display indicates the number of the upcoming sample
event and the total number of programmed samples. The second line indicates the number of pulses remaining to the sample event.
12
SAMPLE
AFTER
1 OF 24
9 PULSES
This display indicates that one pulse has been received. The pulse countdown will continue until the next sample event.
↓
↓
13
SAMPLE 1 OF 24
When the flow countdown reaches zero and the sampler has initiated the
sample event, the sampling cycle begins. When the pump reverses for the
pre-sample purge, the second line disappears.
31
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
14
15
Run State Displays
Comment
SAMPLE 1 OF 24
PUMPING 250 ml
At the end of the pre-sample purge, the pump runs forward to deliver the
sample, and the second line appears on the display. This display remains
through the end of the post-sample purge.
SAMPLE 2 OF 24
AFTER
10 PULSES
At the end of the sample event, the display changes to indicate the number
and time of the next event.
SAMPLE 2 OF 24
The cycle is repeated for the remainder of the sampling routine.
SAMPLE 2 OF 24
PUMPING 250 ml
↓
↓
16
17
DONE . . .
6:10:35
24 SAMPLES
15-JUN-91
This display appears when the routine is completed. It reports the status of
the routine (“DONE”), the total number of sample events, and the current
time and date.
Example 4 Calibration Procedure
This example demonstrates the method used to calibrate the sampler for a 200 ml sample volume. The Calibrate Sampler configure option must be enabled in the configure sequence before the calibration displays
shown below will appear.
Even without calibrating, the sampler will deliver accurate sample volumes. If your sample volumes vary
significantly with the entered values, check the suction line first. Be sure the line slopes continuously
downhill and is draining completely after each pumping cycle. Then, check the suction line entries in the
configure sequence to see that they are accurate. The calibration procedure is intended to be for “fine tuning” only.
After you enter the sample volume actually delivered, as shown in step 8, all subsequent sample volumes
delivered will be adjusted to correct for the difference between the expected sample volume and the actual
volume entered. Clear the adjustment by changing a suction line entry in the Suction Line configure option
or by re-initializing the sampler.
Because the sample volume can be calibrated to ± 10 ml, a graduated cylinder should be used to facilitate
measurement. A graduated cylinder is available from the factory. Refer to the Accessories List on page 97
for details.
The calibration pump cycle will include rinse cycles and retries, if the sampler is configured to perform them
(Liquid Detector on page 34). This insures that the calibration procedure includes the pump cycle used
while running the sampling program.
Step
No.
Display
1
. . . STANDBY . . .
9:34:50 14-JUN
2
[PROGRAM, CONFIGURE]
SAMPLER
Procedure
Press ENTER/PROGRAM to access the interactive state.
Access the program sequence by selecting “PROGRAM.”
32
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
3
[TIME, FLOW]
PACED SAMPLING
Step through the program until the “CALIBRATE SAMPLER?” input display appears (step 5).
4
↓
↓
5
CALIBRATE SAMPLER?
[YES, NO]
6
PRESS MANUAL SAMPLE
KEY WHEN READY . . .
Before pressing the MANUAL SAMPLE key, make sure a collection container
is underneath the pump tube.
7
. . . MANUAL SAMPLE . . .
PUMPING 200 ml
The sampler will deliver the programmed sample volume.
8
200 ml VOLUME
DELIVERED
9
CALIBRATE SAMPLER?
[YES, NO]
10
↓
↓
11
. . . STANDBY . . .
9:39:50 14-JUN-91
Other program sequence displays.
Select “YES.”
Measure the actual volume delivered and enter that value here.
Repeat the procedure if desired by selecting “YES.” When you are satisfied
with the calibration, select “NO.” Under normal conditions, you should not
need to repeat the procedure.
Other program sequence displays.
The sampler will return to standby. Press the START SAMPLING key to run
the program.
CONFIGURE SEQUENCE
By pressing the LEFT ARROW or RIGHT ARROW key
at the “SELECT OPTION” display in the configure
sequence, you can scroll through the list of configure options without viewing each input display. If
you are interested in only one or two options, you
can use this method to locate the option of interest
quickly.
The configure sequence provides a number of
setup options. Some options enable sampling features, some provide reference data, and others
affect run state operations.
Example 1 shows the procedure used to access
the configure sequence. (When you see a “SELECT
OPTION: (← →)” display, you are in the configure
sequence.) Each option uses at least two displays.
The first display lists the option name. The second
and any additional displays are input displays. To
access an input display, press the ENTER/PROGRAM
key while the desired option name is displayed.
Once you’ve accessed the input display, use the
keypad to enter numbers and make choices as
described in Keypad Description on page 20
through Displays on page 21.
Each option is discussed below in the order in
which it appears when configuring the sampler.
Individual input displays and their settings, are
discussed separately within the discussion of each
option. The name of the setting is placed in the left
margin so you can identify each topic. Illustrations
of displays are not included in each discussion;
however, each discussion includes the display
number, should you need to refer to display listing
in Display Index on page 99.
Pressing the EXIT PROGRAM key in the configure
option list will return the sampler to standby. Pressing the EXIT PROGRAM key in a configure option
input display will return you to the list of configure
options without changing the display’s setting.
33
3710R/3710VR/3750 Refrigerated Sampler
SET CLOCK
Table 5 Standard Bottle Volume Settings
The Set Clock option is used to synchronize the
sampler’s clock with real time. Times must be
entered in military time: 9:30 am would be entered
as 9:30, 9:30 pm would be entered as 21:30. When
the year entry is accepted, the seconds will be
reset to zero. (Display #210)
Bottle Material
Bottle
Size
Bottle Volume
Setting
Glass Or Polyethylene
2.5 gal
9400
Polyethylene
4 gal
15000
Polyethylene
5.5 gal
20800
BOTTLE SIZE
SUCTION LINE
The Bottles Size option is used to enter the bottle
volume. The option uses two input displays:
The Suction Line configure option is used to configure the sampler for the type (vinyl or Teflon),
diameter, and length of the suction line used. The
volumetric delivery varies with line diameter,
type, and length, so it is important that these settings be entered accurately. An incorrect setting
will impair the accuracy of the sample volume.
These settings are also used to determine the
number of post-sample purge counts. It is important to have sufficient counts to completely clear
the line.
• the first display allows you to specify a portable or refrigerated sampler.
• the second display sets the bottle volume.
The sampler uses the bottle size entry to calculate
the range of acceptable values in the sample volume input display. It also uses the bottle size to
check for probable overfill when the sampler is
programmed for flow-paced sampling.
Portable or Refrigerated Sampler
If you change the current suction line settings, the
“. . . CALCULATING . . . PUMP TABLE VALUES”
message will appear for a short time. Because the
volumetric delivery of the sample varies with the
diameter, type, and length of the suction line; the
sampler must revise the internal pump tables. The
tables are used as reference for the electronic
pump count for sample delivery.
Because the 3710 Series portable and refrigerated
samplers use the same control box, you must specify the type of unit. The sampler will be shipped
with this setting as “REFRIGERATED.” This setting is not changed when you re-initialize the settings. You should not specify “PORTABLE” unless
you move the control box to a portable sampler.
(Display #220).
There are three types of suction lines available for
use with the sampler: 1/4 inch vinyl, 3/8 inch vinyl,
and 3/8 inch Teflon. If you specify 1/4 inch line, the
sampler will prompt you for the line length immediately. If you specify 3/8 inch line, the sampler will
prompt you to specify vinyl or Teflon before
prompting for the line length. (Display #’s 230 and
231).
Bottle Volume
Table 5 lists Isco’s standard bottle sizes for composite samplers. When using the standard bottles,
enter the bottle volume setting listed in the third
column of the table. The recommended bottle sizes
have been adjusted downward. Using the lower,
adjusted volume helps prevent overfilling. If you
are using a non-standard bottle, enter a bottle volume smaller than the actual bottle capacity. This
will help prevent overfilling. (There are approximately 3785 ml per gallon.)
The sampler will accept suction line lengths of 3 to
99 feet. When measuring the line, do not include
the tube coupling or the strainer in the measurement. The line should be cut to even foot lengths.
(Display #232).
Cumulative Error
The sample accuracy is the greater of 10% of the
sample volume or 20 ml and is repeatable to ± 10
ml. Since samples of 150 ml can vary by 10 % or ±
15 ml, the cumulative error for 24 samples would
be ± 360 ml. If the sampler consistently places 24
sample volumes of 165 ml (150 ml + a 10% variation of 15 ml) in a 3800 ml bottle, the total volume
deposited would be 3960 ml, overfilling the bottle
by 160 ml. Again, to avoid possible overfilling,
enter a bottle volume that is less than the actual
bottle capacity.
LIQUID DETECTOR
The Liquid Detector configure option is used to
turn the liquid detector on or off, set the number of
rinse cycles, add a suction head setting to the program sequence, and set the number of sampling
retries should the suction line become clogged. The
option uses four input displays. Each display is
discussed below.
34
3710R/3710VR/3750 Refrigerated Sampler
Enable/Disable Detector
Enter Head Manually
The recommended setting for the Enable/Disable
Detector option is “ENABLE.” The sampler determines the delivered sample volume suction head
by counting revolutions of the peristaltic pump
rotor. The volume of liquid delivered by one revolution of the pump rotor is a function of the suction
head; as the suction head increases, the volume
delivered by one revolution of the pump rotor
decreases.
Entering the head manually is available as an
option when the detector is enabled and allows you
to add the suction head entry (Display #70) to the
program sequence. When the detector is disabled,
the Suction Head entry is automatically added to
the program sequence. By disabling the suction
head setting, you allow the liquid detector to determine the operating suction head each time a sample is taken. Using the Suction Head entry in
conjunction with the liquid detector, when the head
is stable and known accurately, further increases
accuracy of the delivered volume. When the head
is variable or unknown, you should select “NO”
because an incorrect head setting diminishes the
delivered volume accuracy. (Display #242).
By enabling the detector, the sampler can accurately determine the operating suction head. It
does not have to rely on a programmed suction
head value, but can instead begin its volume delivery count when liquid is detected. This minimizes
inaccuracies that can occur in changing head conditions, or when measurement of the suction head
is difficult to determine accurately.
Sampling Retries
The Sampling Retries option is available as an
option when the detector is enabled. It sets the
number of times, from 0 to 3, the sampler will try
to detect liquid in the line before skipping the sample. This option can be used when sampling liquid
with a high concentration of solids which tend to
clog the suction line or the strainer. The sampler
will also retry the rinse cycle when you are using
the Sampling Retry option. (Display #243).
The disable option is provided should the detector
or its associated circuitry become suspect. If the
detector is disabled, the manual suction head setting (Display #70) is automatically added to the
Sample Volume program section in the program
sequence. If the detector is disabled, the sampler
will use a calculated number of pump counts based
on the suction head entry to deliver the correct sample volume. The sampler will operate at diminished
accuracy with the detector disabled. (Display #240).
PROGRAMMING MODE
Rinse Cycles
The Programming Mode option allows you to specify either the basic or extended programming
mode. The basic programming mode is used for
conventional routines; the extended programming
mode can be used for either conventional or more
complex routines.
The Rinse Cycle setting is available only when the
detector is enabled. It is used to set the number of
suction line rinses, from 0 to 3. Rinses are used to
condition the suction line to reduce cross contamination. During a rinse cycle, the pump draws liquid up through the line until it is detected by the
liquid detector. At that point, the pump reverses to
purge the line. This cycle is repeated according to
the number of rinse cycles entered. (Display #241).
Table 6 summarizes the sampling features according to the programming mode in the program
sequence. Table 4 summarizes the features available in the configure sequence. (Display #250).
Rinse cycles contribute to the wear on pump tubing; therefore, if you use rinse cycles, it may be
necessary to replace the tubing more frequently.
The Tubing Life configure option, (page 41) allows
you to monitor pump tubing wear.
35
3710R/3710VR/3750 Refrigerated Sampler
Table 6 Sampling Capabilities available through the Program Sequence
Basic
Extended
Availability
✔
✔
Samples taken at regular time intervals from 1 minute to
99 hours, 59 minutes.
Time-pacing:
Nonuniform Clock Time Intervals
✔
Samples taken at irregular time intervals by specifying the
time and date of each sample. Dates can be entered up to
one month in advance of the current date.
Time-pacing:
Nonuniform Intervals in Minutes
✔
Samples taken at irregular time intervals by specifying the
amount of time in minutes between each sample. Intervals
can be entered from 1 to 99 minutes.
✔
✔
Samples taken at regular flow intervals. The sampler will
totalize flow intervals of 1 to 9999 pulses.
Number of samples
✔
✔
Number of samples needed to complete the routine. A specific number of samples (up to 999) can be entered or the
sampler can be programmed to terminate the routine with
the float shut-off.
Sample Volume
✔
✔
Volumes from 10 to 9990 ml can be entered.
Suction Head
✔
✔
Suction heads from 1 to 20 feet can be entered.
Calibration
✔
✔
Sample Volumes can be calibrated, if desired.
✔
✔
Specific start times can be entered for both time-paced and
flow-paced routines. If no start time is entered, the Start
Time Delay will be used.
✔
Intermittent sampling can be performed by defining sampling stop and resume times. Up to 12 stop times and 12
resume times can be entered.
Program Sequence
Feature
Pacing:
Time-pacing:
Uniform Time Intervals
Flow-pacing
Volumes and Accuracy:
Key Times:
Start Times
Stop/Resume Times
36
3710R/3710VR/3750 Refrigerated Sampler
LOAD STORED PROGRAM
programs: the current program and three stored
programs, numbered from 1 to 3. All four programs contain the factory default program settings. Unless you have previously saved a program
under one of the program numbers, loading a program will replace the current program with the
factory default settings. When you re-initialize the
sampler, all four programs return to the default
program settings.
The Load Stored Program option allows you to
load one of up to three sampling programs which
have been previously saved with the Save Current
Program configure option, discussed on page 38.
After loading a program, the sampler will adjust
the time settings to current times and dates.
Check the settings before starting the program to
be sure they are appropriate for your application.
(Display #255)
The following example shows you how to load a
stored program.
The sampler is shipped from the factory with four
Example 5 Loading a Stored Program
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:34:50 14-JUN-91
2
[PROGRAM, CONFIGURE]
SAMPLER
3
SELECT OPTION: (← →)
SET CLOCK
4
↓
↓
5
SELECT OPTION: (← →)
PROGRAMMING MODE
6
[BASIC, EXTENDED]
PROGRAMMING MODE
Select “EXTENDED.” Press the ENTER/PROGRAM key to accept the selection.
7
SELECT OPTION: (← →)
LOAD STORED PROGRAM
Press ENTER/PROGRAM to access the Load Stored Program configure option.
8
LOAD PROGRAM
[#1, #2, #3, NONE]
Select the number of the program you want to load. Select “NONE” when
you do not want to load a program.
9
SELECT OPTION: (← →)
SAVE CURRENT PROGRAM
When the sampler has loaded the program, it will display the next configure option. When you are done configuring the sampler, press EXIT/PROGRAM to return to Standby.
10
. . . STANDBY . . .
10:37:23 14-JUN-91
After the sampler is properly installed, press the START SAMPLING key to
run the program.
Press ENTER/PROGRAM to access the interactive state.
Access the configure sequence by selecting “CONFIGURE.”
Press the LEFT ARROW or RIGHT ARROW key to scroll through the configure
options. The first option displayed is the Set Clock configure option.
You can load a stored programmed only when the sampler is configured for
the extended programming mode. To verify the programming mode setting,
press the ENTER/PROGRAM key.
37
3710R/3710VR/3750 Refrigerated Sampler
SAVE CURRENT PROGRAM
The sampler is shipped from the factory with four
programs: the current program and three stored
programs, numbered from 1 to 3. All four programs contain the factory default program settings. Saving a program will replace the default
program with the current settings. Re-initializing
the sampler will restore the default program settings. The default program settings are listed in
Table 7.
The Save Current Program option allows you to
assign up to three sampling routines a number
and store them. This option eliminates the need to
reprogram the sampler for recurrent routines.
Only the program settings are saved; if different
routines require different configurations, the sampler must be reconfigured for each routine. For
example, if the sampler is used at two sites, each
requiring a specific sampling routine and different
suction line lengths; the sampling routines can be
stored for each site, but the suction line length settings must be reentered each time the line
changes. (Display #260).
Note: saving a program will overwrite a program
saved earlier under the same number. Settings for
the current program can be viewed with the Display Status procedure.
The following example shows you how to save a
current sampling program.
Example 6 Saving a Current Program
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:34:50 14-JUN-91
2
[PROGRAM, CONFIGURE]
SAMPLER
3
SELECT OPTION: (← →)
SET CLOCK
4
↓
↓
5
SELECT OPTION: (← →)
PROGRAMMING MODE
You can save the current program only when the sampler is configured for
the extended programming mode. To verify the programming mode setting,
press the ENTER/PROGRAM key.
6
[BASIC, EXTENDED]
PROGRAMMING MODE
Select “EXTENDED.” Press the ENTER/PROGRAM key to accept the selection.
7
SELECT OPTION: (← →)
LOAD STORED PROGRAM
Press the RIGHT ARROW key to skip the Load Stored Program configure
option.
8
SELECT OPTION: (← →)
SAVE CURRENT PROGRAM
Press the ENTER/PROGRAM key to access the Save Current Program configure option.
9
SAVE PROGRAM AS
[#1, #2, #3, NONE]
Select the number you want to use as the program “name.” Select “NONE”
when you do not want to save a program. When the sampler has saved the
program, it will display the next configure option. When you are done configuring the sampler, press EXIT/PROGRAM to return to Standby.
10
. . . STANDBY . . .
10:37:23 14-JUN-91
When the sampler is properly installed, press the START SAMPLING key to
run the program.
Press ENTER/PROGRAM to access the interactive state.
Access the configure sequence by selecting “CONFIGURE.”
Press the LEFT ARROW or RIGHT ARROW key to scroll through the configure
options. The first option displayed is the Set Clock configure option.
38
3710R/3710VR/3750 Refrigerated Sampler
FLOW MODE SAMPLING
Sample at Stop
The Flow Mode Sampling option is used to direct
the sampler to take a sample at key times in a
flow-paced sampling program.
The Sample at Stop setting is used to direct the
sampler to take a sample at stop times. (Display
#301).
Sample at Resume
Sample at Start Time
The Sample at Resume setting is used to direct the
sampler to take a sample at resume times. (Display #302).
If you select “YES,” the first sample will be taken
at the start time entered in the program sequence.
If you select “NO,” the first sample is delayed until
the number of flow pulses, set in the program
sequence, have been counted down to zero. (Display #270).
START TIME DELAY
The Start Time Delay option is used to set the
amount of time in minutes, between the time you
press the START SAMPLING key and the time the
sampling routine is initiated. The sampler’s
response varies according to specific entries: “0,”
“1,” and entries greater than 1.
NONUNIFORM TIME
The Nonuniform Time option specifies the method
in which nonuniform intervals are to be entered in
the extended program sequence (Display #’s 26 or
27). If you select “CLOCK-TIME,” you will be able
to enter a specific time and date for each sample
event when entering settings in the program
sequence. If you select “MINUTES,” you will be
able to enter nonuniform intervals in minutes.
(Display #280).
---MINUTE DELAY
TO START (0 - 9999)
An entry of “0” eliminates the delay to start time;
the start time occurs the moment you press START
SAMPLING. For example, if you press START SAMPLING at 10:32:15, the sampler will initiate a timepaced sample event at 10:32:15.
When you enter nonuniform times, you will be
prompted to enter the number of nonuniform samples before you enter the nonuniform times. This
display replaces the Number of Composite Samples
display (Display #60) in the program sequence.
However, the sampler will start clocking time
intervals at the beginning of the minute
(HH:MM:00) of the first sample event. If a sampling routine requires 10 minute intervals and you
pressed START SAMPLING at 10:32:15, the sampler
would begin the time interval at 10:32:00. It would
initiate the second sample event at 10:42:00. The
sampler would begin the flow interval at 10:32:15
for flow-paced routines.
CALIBRATE SAMPLER
The Calibrate Sampler option is used to add or
remove the calibration settings to the program
sequence. If you select “ENABLE,” the calibration
displays will be added to the program sequence
and you will be able to precisely calibrate the sample volumes. (Display #290).
If you enter a start time delay of “1,” the sampler
will begin the routine at the beginning of the next
minute. Thus, if you pressed START SAMPLING at
10:32:15, the sampler would initiate the sample
event at 10:33:00. The sampler would begin time
and flow intervals at 10:33:00. If you enter a start
time delay of “2,” the sampler would begin time or
flow intervals at 10:34:00. (Display #310).
SAMPLING STOP/RESUME
The Sampling Stop/Resume configure option
allows you to add stop and resume settings (Display #’s 100, 101, and 102) to the program
sequence. The Stop/Resume settings appear in the
key time section of the program sequence. (You can
enter up to 24 times: 12 stop times and 12 resume
times.) For example, the Stop/Resume option
allows you to define a sampling routine which will
take samples at intervals of 15 minutes between
6:00 am to 8:00 am and between 4:00 pm to 6:00
pm. The stop and resume entries for this routine
are shown in Example 7.
Note: If you enter a start time, the sampler will
disregard the start time delay. The sampler will
use the start time delay setting when you do not
enter the start time in the program sequence. Care
must be taken when using a start time delay of
greater than zero when the sampler is being inhibited by another sampler, a 3200 or 4200 Series
Flow Meter, a 4100 Series Flow Logger, or a Liquid
Level Actuator. Refer to Enable Pin on page 40.
Enable/Disable
Select “ENABLE” to add the stops and resume settings to the program sequence. (Display #300).
39
3710R/3710VR/3750 Refrigerated Sampler
ENABLE PIN
(Display #324).
The Enable Pin option allows you to program the
sampler’s response to a device controlling pin F of
the flow meter connector: for example, a 3200
Series Flow Meter or the Model 1640 Liquid Level
Actuator. There are four Enable Pin setup options:
Sample Upon Disable, Sample Upon Enable, Reset
Sample Interval, and Inhibit Countdown.
EVENT MARK
The Event Mark option configures the sampler to
send an event mark to an interfaced flow meter or
other equipment. The sampler will supply a variable duration pulse of up to 700 mA at 12 V on pin
E of the flow meter connector. Four types of signals
can be sent:
• a pulse at the beginning of the pre-sample
purge.
• a pulse at the beginning of forward pumping
only.
• continuous during the entire pump cycle.
• continuous during forward pumping only.
The type of signal selected from the Event Mark
configure option affects the event mark signal on
pin E. In Figure 10A a pulse signal is sent at the
beginning of the pre-sample purge.
Sample Upon Disable
When you are using an Isco Flow Meter, Flow Logger, or Liquid Level Actuator, “SAMPLE UPON
DISABLE?” allows you to direct the sampler to
take a sample as soon as the sampler is disabled
through pin F. A response of “YES” will cause the
sampler to take a sample when the pin is disabled;
a response of “NO” will prevent the sampler from
taking a sample. (Display #321).
The sampler determines an enable or disable condition by monitoring the voltage on pin F. High
voltage is interpreted as an enable signal. Low voltage or ground is interpreted as a disable signal.
In Figure 10B a pulse signal is sent during the
sample volume delivery portion of the sample
event. In Figure 10C a continuous signal is sent
during the entire pump cycle. In Figure 10D a
continuous pulse is sent for the duration of the
sample volume delivery.
Sample Upon Enable
When you are using an Isco Flow Meter, Flow Logger, or Liquid Level Actuator, “SAMPLE UPON
ENABLE?” allows you to direct the sampler to take
a sample as soon as the sampler is enabled through
pin F. A response of “YES” will cause the sampler
to take a sample when the pin is enabled. A
response of “NO” will prevent the sampler from
taking a sample when the pin is enabled. (Display
#322).
Continuous/Pulse Signal
The Continuous/Pulse setting is used to select
either continuous or pulse signals. Pulse signals
are three seconds in duration; continuous signals
are three seconds or longer and depend on the setting and the pump cycle. (Display #330).
Continuous Signal Timing
Reset Sample Interval
The Pump Cycle/Fwd Pumping settings will
appear when you have selected “CONTINUOUS
SIGNAL.” Select “PUMP CYCLE” when you want
a continuous signal transmitted during the entire
pump cycle, from the beginning of the pre-sample
purge to the end of the post-sample purge. Select
“FWD PUMPING” when you want a continuous
signal transmitted while the pump is delivering a
sample volume. (Display #331).
“RESET SAMPLE INTERVAL?” is used to control
the time or flow pulse countdown. If you select
“YES,” a full sample interval will begin when pin F
is enabled. If you select “NO,” the interval will not
be reset when the sampler is enabled.
The interval is then governed by settings entered
in the “INHIBIT COUNTDOWN?” option. If you
are sampling on a time-paced basis and wish to
synchronize all sampling with real time, do not
reset the sample interval. (Display #323).
Pulse Signal
The Pulse Signal setting will appear when you
have selected “PULSE.” Two options are available.
The first option, “PURGE,” is used to send a pulse
at the beginning of the pre-sample purge. The second option, “FWD PUMPING,” is used to send a
pulse at the beginning of the sample delivery when
the pump is running forward. (Display #332).
Inhibit Countdown
“INHIBIT COUNTDOWN?” is only applicable
when you respond “NO” to “RESET SAMPLE
INTERVAL?” The Inhibit Countdown option is
used to control the countdown while the sampler is
disabled. Select “YES” to freeze the countdown to
the next sample. The count will resume when the
sampler is enabled. Select “NO” to allow the countdown to continue while the sampler is disabled.
40
3710R/3710VR/3750 Refrigerated Sampler
Figure 10 Event Mark Signal Output
Pre-sample Purge
Rinse Cycle
Pumping Sample Volume
Post-sample Purge
A
Pulse at Beginning of Pre-sample Purge
B
Pulse at Beginning of Forward Pumping Only
C
Continuous During Entire Pump Cycle
D
Continuous During Forward Pumping Only
PURGE COUNTS
entered value. You must reset the pump counter
after replacing the pump tubing. If you consistently experience a tubing failure at a pump count
that differs significantly from the current setting,
enter that value here. The factory set value of
500,000 pump counts will deliver approximately
500 samples of 200 ml each, using a 3/8 inch x 10 ft
vinyl suction line at a 5 ft suction head. (Display
#350, 351, and 352).
The Purge Counts option is used to override the
number of pump counts needed to clear the suction
line in both pre-sample purge and post-sample
purge cycles. The pre-sample purge count is normally set to 150 counts and will be reset to this
value if the sampler is re-initialized. The postsample purge count is derived from the suction
line diameter and length settings. If your observations indicate that a greater or lesser number of
pump counts in either purge is needed, you can
change the count settings. Acceptable entries are
between 0 and 9999 for both purges. A purge count
can be obtained using the PUMP FORWARD or PUMP
REVERSE keys. (Display #’s 340 and 341).
PROGRAM LOCK
The Program Lock option allows you to protect
program and configure settings with a pass-number. Select “ENABLE” to turn the protection on.
When the Program Lock is enabled, each protected
display can be viewed, but no values can be
changed without first entering the pass-number:
3710. Once the pass-number has been entered, you
can change any value or setting in either the program or configure sequence. (Display #360).
TUBING LIFE
The Tubing Life option is used to set the number of
pump counts needed to trigger the “REPLACE
PUMP TUBING” warning. The warning will be
activated when the pump count reaches the
41
3710R/3710VR/3750 Refrigerated Sampler
SAMPLER ID
LCD Test
After successful RAM and ROM tests, the sampler
will then test the LCD by first filling the display
with solid rectangles and then printing the alphabet and other characters. Each character position
in the display should contain a character.
The Sampler ID option allows you to enter a 10
character identification number (ID) for the sampler. The ID number is used to identify sampling
reports produced by the Isco Field Printer and in
files created by SAMPLINK. The sampler is
shipped from the factory with 10 dashes (-) entered
for the ID. (Display #365).
Pump Test
The next step tests the pump. During the test, the
pump will run briefly and the display will indicate
an “OFF/ON” number. The number should fall
within the range of 50 to 200. If the count falls
below 50 or exceeds 200, the pump should be serviced. A count near 100 is typical.
Acceptable Characters
The ID field will accept digits, dashes, spaces, and
periods. You can enter spaces, dashes, and periods
with three of the control keys. Enter a space with
the START SAMPLING key, a dash (-) with the MANUAL SAMPLE key, and a period with the RESUME
SAMPLING key.
Re-initialize Controller
The final step allows you to re-initialize the sampler. If you select “NO,” the sampler will return to
the configure option list. If you select “YES,” the
sampler will reset a number of configuration and
program settings, then turn the sampler off. (Display #371).
RUN DIAGNOSTICS
Run Diagnostics is used to perform a number of
diagnostic functions. This option contains the software revision number; tests the sampler’s RAM
(Random Access Memory), ROM (Read Only Memory), display, and pump; and allows for re-initializing RAM. The display information is discussed
below in the order of appearance.
Tables 7 and 8 list the re-initialized settings. Note:
Not all settings are reset. Set Clock, Bottle Size,
Suction Line, and Sampler ID configure option settings remain unchanged. This reduces the number
of settings you would need to change if the sampler
were accidentally re-initialized. The Pump Count
total is not reset to maintain an accurate count for
the Tubing Life Warning.
Software Revision Number
The sampler will display the software revision
number for a short period of time.
Test RAM and ROM
The software revision display is replaced by the
RAM and ROM test messages. A successful test is
indicated by the messages “RAM PASSED TEST” or
“ROM PASSED TEST.” If either the RAM or ROM
fail the test, the sampler will display one of the following messages: “RAM FAILED TEST” or “ROM
FAILED TEST” and beep every three seconds until
you turn the sampler off. If either the RAM or ROM
fail their test, the sampler should be serviced. Contact Isco Customer Service for assistance.
EXIT CONFIGURATION
This option allows you to leave the configure
sequence and return to the standby state. There
are no input displays. Press the ENTER/PROGRAM
key to exit the configure sequence. The configuration sequence can also be exited at any time using
the EXIT PROGRAM key.
42
3710R/3710VR/3750 Refrigerated Sampler
Table 7 Factory Program Sequence Settings
Program Setting
Display No.
Factory
Setting
TIME/FLOW
PACED SAMPLING
10
TIME
UNIFORM/NONUNIFORM
TIME INTERVALS
11
UNIFORM
SAMPLE EVERY
-- HOURS -- MINUTES
21
1 HOUR
0 MINUTES
SAMPLE EVERY
---- PULSES (1 - 9999)
22
10
TAKE --- SAMPLES
(1 - MAX)
25
10
QUANTITY AT INTERVAL
1. -- AT --- MINUTES
27
1 AT 60 MINUTES
SAMPLE VOLUMES OF
--- ml EACH (10 - MAX)
50
200
--- COMPOSITE
SAMPLES (0 - MAX)
60
10
SUCTION HEAD OF
-- FEET (1 - MAX)
70
10
ENTER START TIME?
[YES, NO]
90
NO
-- STOP or RESUME
TIMES (0 - 24)
100
0
43
3710R/3710VR/3750 Refrigerated Sampler
Table 8 Factory Configure Option Settings
Configure Option
Display No.
Factory Setting
210
NOT RESET
220, 223
NOT RESET
230, 231, 232
NOT RESET
LIQUID DETECTOR
240
ENABLE
RINSES
241
0
ENTER HEAD MANUALLY
242
NO
# OF RETRIES
243
0
PROGRAMMING MODE
250
BASIC
LOAD STORED PROGRAM
255
SAVE CURRENT PROGRAM
260
SET CLOCK
BOTTLE SIZE
SUCTION LINE
LIQUID DETECTOR
FLOW MODE SAMPLING
SAMPLE AT START TIME
270
NO
NONUNIFORM TIME
280
MINUTES
CALIBRATE SAMPLER
290
DISABLE
SAMPLING STOP/RESUME
300
DISABLE
SAMPLE AT STOP TIMES
301
NO
SAMPLE AT RESUME TIMES
302
NO
310
2
SAMPLE UPON DISABLE
321
NO
SAMPLE UPON ENABLE
322
NO
RESET SAMPLE INTERVAL
323
NO
INHIBIT COUNTDOWN
324
NO
CONTINUOUS /PULSE
330
CONTINUOUS SIGNAL
PUMP CYCLE/FWD ONLY
331
FWD PUMPING ONLY
PURGE/FWD PUMPING
332
FWD PUMPING
PRE-SAMPLE COUNTS
340
150
POST-SAMPLE COUNTS
341
BASED ON LINE LENGTH
RESET PUMP COUNTER
351
NO
# PUMP COUNTS
352
NOT RESET
PROGRAM LOCK
360
DISABLE
SAMPLER ID
365
NOT RESET
371
NO
START TIME DELAY
ENABLE PIN
EVENT MARK
PURGE COUNTS
TUBING LIFE
RUN DIAGNOSTICS
RE-INITIALIZE?
44
3710R/3710VR/3750 Refrigerated Sampler
EXTENDED PROGRAMMING MODE
7:00 am on April 16, and 1:00 pm (or 13:00 in military time) on April 16. If you have several
sequences of nonuniform times, you can use the
program storage feature to save the programs
using each sequence.
All sampling capabilities available in the basic
programming mode are available in the extended
programming mode. (A listing of the capabilities is
placed in Table 6.) The extended programming
mode provides several additional capabilities:
Nonuniform Time pacing, Sampling Stops and
Resumes, program storage, and Flow Mode Sampling controls.
When you enter nonuniform times, you will be
prompted to enter the number of nonuniform samples — “TAKE - - SAMPLES” (Display 25) —
before you enter the nonuniform times. This display replaces the Number of Composite Samples
display (Display #60) in the program sequence.
The procedure used to program the sampler in the
extended mode is the same as the procedure used
to program the sampler in the basic programming
mode. This procedure is outlined in Programming
Examples on page 24 There are some exceptions,
however. The extended mode modifies the sections
of the program sequence to allow you to take
advantage of the additional features. The Sample
Pacing program section is extended to include settings for nonuniform times. If you have enabled
the Sampling Stops and Resumes configure option,
the Key Times section is extended to included displays for sampling stops and resumes.
EXTENDED MODE SAMPLE VOLUMES
The extended mode Sample Volumes section is
identical to the basic Sample Volume section. It is
modified only when you are using nonuniform
times. The Number of Composite Samples display
is removed (Display #60) as discussed above.
EXTENDED MODE KEY TIMES
The extended mode Key Times section has one
additional set of displays which allow you to set up
the sampling stop and resume times. The Stops
and Resumes settings are available only when you
have enabled the Sampling Stop/Resume configure
option (see Sampling Stop/Resume on page 39).
You must first enter the number of stops and
resumes, from 0 to 24. (Enter “0” if you want to
omit the stop and resume settings without returning to the configure sequence and disabling the
Stops and Resumes option.) Then enter the stop
and resume clock times. The first entry will be a
stop time. Refer to the Key Times section of Figure 11, display #’s 100, 101, and 102.
Each of these extended features is discussed
briefly below. You may find it helpful to refer to
Figure 11 which charts the program sequence in
the extended mode.
EXTENDED MODE SAMPLE PACING
In the extended programming mode, the Sample
Pacing section allows you to select flow pacing, or
one of two types of time-pacing: uniform or nonuniform. If you select uniform time intervals, the settings for time intervals are identical to the time
intervals entered in the basic programming mode.
Nonuniform times allow you to pace the sampler
at irregular intervals. Before you enter nonuniform time intervals, you must specify either minutes or clock times in the Nonuniform Times
configure option. You can enter nonuniform intervals in two ways. The first method allows you to
define the interval between each sample event in
minutes. For example, you can program the sampler to take sample #2 after an interval of 10 minutes, sample #3 after an interval of 30 minutes,
sample #4 after an interval of 60 minutes, and so
on. Sample #1 would be taken at the start time.
The second method allows you to enter a specific
time and date for each sample event. For example,
with nonuniform time pacing, samples can be collected at specific times and dates at irregular
intervals: 6:00 am on April 15, noon on April 15,
Determining the Number of
Samples with Stops and Resumes
When using stops and resumes, determining the
number of samples you want deposited in the container requires a little planning. With a timepaced routine, a sample will always be taken automatically at the start time. No sample will be
taken at the stop time unless you have selected
“ENABLE” in the Sample at Stop Time display of
the Sampling Stops and Resumes configure option,
even if the stop time falls at a scheduled sample
event time. No sample will be taken at the resume
time unless you have selected “ENABLE” in the
Sample at Resume display of the Sampling Stops
and Resumes option.
45
3710R/3710VR/3750 Refrigerated Sampler
Figure 11 Extended Programming Mode: Program Sequence Structure
. . . STANDBY . . .
9:50:34
11-JUN-91
Display #1
[PROGRAM, CONFIGURE]
SAMPLER
Configure
Program
Display #10
Sample Pacing
[TIME, FLOW]
PACED SAMPLING
Time
Flow
Display #11
Display #22
[UNIFORM, NONUNIFORM]
TIME INTERVALS
Uniform Time
SAMPLE EVERY
---- PULSES (1 - 9999)
Nonuniform Time
Display #21
Display #20
SAMPLE EVERY
-- HOURS -- MINUTES
MODIFY SEQUENCE?
[YES, NO]
Yes
No
Display #25
TAKE --- SAMPLES
(1 - MAX)
Clock-time
Minutes
Display #26
TAKE SAMPLES AT
1. HH:MM DD-MMM
Display #27
QUANTITY AT INTERVAL
1. -- AT --- MINUTES
Display #60
-- COMPOSITE
Not displayed when
Nonuniform Times used
SAMPLES (0-MAX)
Display #50
Sample Volume
SAMPLE VOLUMES OF
--- ml EACH (1-MAX)
Display #70
SUCTION HEAD OF
-- FEET (1-MAX)
See Liquid Detector configure option
in Chapter 3.
Display #80
CALIBRATE SAMPLE
VOLUME? [YES, NO]
See Example 4. Calibration Procedure
in Chapter 3.
Display #90
Key Times
ENTER START TIME?
[YES, NO]
Yes
No
Flow
Time
Display #92
Display #91
START FLOW COUNT AT
HH:MM DD-MMM
TAKE FIRST SAMPLE AT
HH:MM DD-MMM
Display #100
-- STOP or RESUME
TIMES (1-24)
Display #101
STOP SAMPLING AT
1. HH:MM
DD-MMM
Display #102
RESUME SAMPLING AT
1. HH:MM
DD-MMM
PROGRAMMING SEQUENCE
COMPLETE
. . . STANDBY . . .
9:54:40
11-JUN-91
46
See Sampling Stop/Resume configure option
in Chapter 3.
3710R/3710VR/3750 Refrigerated Sampler
When you are using Stops and Resumes with flowpaced routines, a sample will not be taken at the
start time, unless you have configured the sampler
to do so in the Flow Mode Sampling configure
option. With flow-paced routines, no sample will be
taken at the stop time unless you have selected
“ENABLE” in the Sample at Stop Time display of
the Sampling Stops and Resumes option. No sample will be taken at the resume time unless you
have selected “ENABLE” in the Sample at Resume
display of the Sampling Stops and Resumes option.
Programmed Start Time displays
(Program Sequence)
ENTER START TIME?
[YES, NO]
If the number of samples deposited is not important
to you or if you are using a flow-paced routine for a
flow-stream with an unpredictable flow rate, enter
“0” in the Number of Composite Samples display
(Display #60). The sampler will take samples indefinitely, governed by the scheduled stop and resume
time. It will be “DONE” at the final stop time or
when the weight table terminates the routine.
Display #90
TAKE FIRST SAMPLE AT
HH:MM DD-MMM
Display #91 (timepaced sampling)
START FLOW COUNT AT
HH:MM DD-MMM
Display #92 (flowpaced sampling)
Start Time Delay display
(Configure Sequence)
---- MINUTE DELAY
TO START (0 - 9999)
Display #310
(Start Time Delay
configure option)
START TIMES
Figure 12 Simplified Start Time Diagram
This section discusses the sampler’s start times. It
begins by outlining the sequence of events preceding the start time for most sampling routines.
START
SAMPLING
After you program a sampler, you must start the
sampling routine by pressing the START SAMPLING
key. However, depending on the program and configure option settings, the sampling routine may
not start at soon as you press the key. The “Delay
to Start Time” is the period between the time you
press START SAMPLING and the start time for the
routine. Figure 12 diagrams the sequence of
events preceding the start time.
Start Time
Delay to
Start Time
Determined by
start time entry
or
start time delay.
The start time for a routine is either the programmed start time or the time at which the delay
to start time expires. The programmed start time
is determined by entries made in Displays #90,
#91, and #92. The delay to start time is determined by the entry in Display #310 of the Start
Time Delay configure option. These input displays
are illustrated below. They are also illustrated in
the program structure charts in Figure 9 on page
25 and Figure 11.
Sampling Routine
Isco 4200 Series Flow Meters and 4100 Series
Flow Loggers provide two essential functions for
certain sampling applications. They send flow-pacing signals — flow pulses — to the sampler for
flow-paced sampling. The second function provides
disable (inhibit) or enable signals to the sampler. A
sampler receiving a disable signal will suspend the
sampling routine until it receives an enable signal.
The sampler will disregard a disable signal received
from a flow meter during the delay to start time. If
the sampler is disabled when the start time occurs,
it will suspend the routine until it is enabled. Once
enabled, the sampler will begin the time or flow
intervals. The sampler will initiate a sample event
when enabled for all time-paced routines.
Note: Unless the sampling routine contains a programmed start time (Displays #91 or #92), the
sampler will delay the start time according to the
amount of time specified in the Start Time Delay
configure option. A programmed start time entry
always overrides any settings made in the Start
Time Delay configure option.
For flow-paced routines, it will initiate a sample
47
3710R/3710VR/3750 Refrigerated Sampler
abled for long periods. If the sampler is disabled
and subsequently enabled, it will initiate only one
event to compensate for the skipped sample events
even if several sample event times have been
passed.
Note: Nonuniform clock time programming is
designed to replace flow-pacing when a flow meter
is not available at the site. Before using a sampler
programmed for nonuniform clock times with a
flow meter, be sure flow-pacing is not a more
appropriate application.
The sampler will disregard the MANUAL SAMPLE
key during the delay to start time and during the
disable period. The periods where the sampler disregards disable signals (Delay to Start) and the
MANUAL SAMPLE key (when disabled) appear in
Figures 13 and 14.
Entries made in the Start Time Delay configure
option affect the start times. (See page 39.)
event when the sampler is configured to take a
sample upon enable in the Enable Pin configure
option (page 40).
If the sampler is enabled when the start time occurs,
it will begin the routine. The sampler will initiate a
sample event at the start time for all time-paced
routines. It will initiate a sample event at the start
time for flow-paced routines when configured for
sample at start time in the Flow Mode configure
option (Nonuniform Time on page 39). Refer to Figure 13. The diagram shows the sampler’s response
when enabled or disabled at the start time for most
basic and extended mode routines.
Nonuniform Clock Times and Disable Signals
Figure 14 diagrams the sequence of events preceding a routine programmed for nonuniform clock
times. Nonuniform clock time programming allows
you to enter a specific time and date for each sample event. Samplers programmed with nonuniform
clock times may skip a number of samples if disFigure 13 Start Time Diagram
Start
Sampling
Start Time
Delay to
Start Time
Determined by
start time entry
or
start time delay
TIME PACING (basic programming)
FLOW PACING (basic and extended programming)
UNIFORM TIME INTERVALS (extended programming)
NONUNIFORM TIME INTERVALS IN MINUTES (extended programming)
• No Manual Samples
• Disable Signal Ignored
Sampler ENABLED
at start time
I
I
I
I
Sample event at start time
• Timed sample events: Always occurs.
• Flow-paced events: Occurs when sampler is configured
for sample at start time in
Flow Mode configure option.
Sampler enabled
Sampler DISABLED
at start time
I
Sampler Disabled
• No Manual Samples
I
Sample event on enable
• Timed sample events: Always occurs.
• Flow-paced events: Occurs when sampler configured
for sample upon enable in
Enable Pin configure option.
I = time or flow interval
48
3710R/3710VR/3750 Refrigerated Sampler
Figure 14 Start Time Diagram for Nonuniform Clock Time Routines
Start
Sampling
Start Time
Delay to
Start Time
Determined by
first nonuniform
clock time entry.
• No Manual
Samples
• Disable Signal
Ignored
Sampler ENABLED
at start time
I
I
I
I
Start time is first nonuniform clock time
Sample event always occurs.
Programmed sample events skipped while
sampler is disabled
Sampler enabled
Sampler DISABLED
at start time
I
I
I
I
Sampler disabled
• No manual samples
One sample event occurs to compensate
for skipped samples.
I = time interval
49
3710R/3710VR/3750 Refrigerated Sampler
FOREIGN LANGUAGES AND
METRIC UNITS OF MEASURE
Select the preferred language from this display. If
you select French, Spanish, or German, the sampler will automatically convert English units of
measure to metric units and return to standby. If
you select English, the input display shown below
will appear.
The sampler provides displays in French, Spanish,
and German. Additionally, it supports entries in
metric units of measure. Metric units include volumes in milliliters, suction head and suction line
length in decimeters, and suction line ID in millimeters.
Select the units of measure from this display. After
you’ve made the selection, the sampler will convert
the units of measure as required and return to
standby.
Samplers using French, Spanish, and German language displays support metric units for suction line
and suction head measurements. Samplers operating with English displays support either English or
metric units for suction line and suction head measurements. (Sample volumes are always entered in
milliliters, regardless of the selected language.)
[U.S., Metric]
Units
PROGRAMMING EXAMPLES
The following examples demonstrate the steps
used to program the sampler for several different
sampling routines in the extended programming
mode. Each programming example concludes with
the run state displays that appear for that routine.
The examples assume you are familiar with the
functions of the keys as discussed in Keypad
Description on page 20 and Displays on page 21.
To program the sampler for foreign language displays, begin by placing the sampler in standby.
Then, access the language programming sequence
by pressing the STOP key five times. The standby
display will be replaced by the input display illustrated below.
[English, German,
Spanish, French]
Example 7 Extended Time-paced Sampling
The following example programs the sampler to take 12 time-paced 500 ml samples. Samples are to be
taken at uniform time intervals of 30 minutes starting at 8:00 am on the following day.
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:34:50 14-JUN-91
2
[PROGRAM, CONFIGURE]
SAMPLER
3
[TIME, FLOW]
PACED SAMPLING
4
[UNIFORM, NONUNIFORM]
TIME INTERVALS
5
SAMPLE EVERY
0 HOURS, 10 MINUTES
Enter “0” to set the hours at zero. Press ENTER/PROGRAM to store the number “0” and move to the minutes entry.
6
SAMPLE EVERY
0 HOURS, 30 MINUTES
Enter “30” to set the minutes entry to 30.
Press ENTER/PROGRAM to access the interactive state.
Access the program sequence by selecting “PROGRAM.”
Select “TIME.”
Select “UNIFORM.”
50
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
7
12 COMPOSITE
SAMPLES ( 0-470)
8
SAMPLE VOLUMES OF
500 ml EACH (10 - 780)
9
ENTER START TIME?
[YES, NO]
10
TAKE FIRST SAMPLE AT
8:00 15-JUN
11
PROGRAMMING SEQUENCE
COMPLETE . . .
After this message is displayed briefly, the sampler will automatically
return to the standby state.
12
. . . STANDBY . . .
10:37:23 14-JUN-91
When the sampler is properly installed, press the START SAMPLING key to
run the program.
Run State Displays
Comment
SAMPLE 1 OF 12
AT 8:00
10:38:07
This display appears as the sampler counts down the time remaining to
the start time. The first line reports the number of the upcoming sample
event and the total number of sample events for the routine. The second
line reports the start time at the left and the current time on the right.
SAMPLE 1 OF 12
When the start time occurs, the sampler will take the first sample. The
sample event cycle begins with a pre-sample purge. During the purge, the
display indicates the sample event number and the number of sample
events for the routine.
13
14
SAMPLE 1 OF 12
PUMPING 500 ml
15
SAMPLE 2 OF 12
AT 8:30 8:01:11
16
↓
↓
17
DONE . . .
2:10:35
12 SAMPLES
15-JUN-91
Enter the number of samples to be collected: “12.”
Enter “500” to set the sample volume at 500 ml.
Select “YES.”
Enter the start time and date: 8:00 on June 15.
As soon as the pump runs forward to deliver the sample volume, the message on the second line appears and remains through the post-sample
purge.
This display appears when the post-sample purge from the previous sample event is completed. It indicates the number of the upcoming sample
event. The second line displays the scheduled time for the next event on
the left. The current time is displayed on the right.
The cycle of displays is repeated until the sampling routine is done.
When the routine is completed, this message appears. It reports the status
of the routine (“DONE”), the total number of sample events, and the current time and date.
51
3710R/3710VR/3750 Refrigerated Sampler
Example 8 Nonuniform Time-paced Sampling
The following example programs the sampler to take time-paced samples at nonuniform time intervals.
This example assumes the sampler is connected to a Liquid Level Actuator which will inhibit the sampler
until the liquid level rises to contact the Actuator probe.
The sampler is to take 20, 100 ml samples: the first samples are to occur at 10 minute intervals for one
hour, the following samples at 20 minute intervals for one hour, and the remaining samples at 30 minute
intervals. Although this example assumes that nonuniform times are being used with the Actuator, uniform time intervals or flow intervals can be used with the Actuator as well.
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:34:50 14-JUN-91
2
[PROGRAM, CONFIGURE]
SAMPLER
3
[TIME, FLOW]
PACED SAMPLING
4
[UNIFORM, NONUNIFORM]
TIME INTERVALS
5
MODIFY SEQUENCE?
[YES, NO]
6
TAKE 20 SAMPLES
(1-470)
Enter the total number of samples: “20.” This entry should always include
the sample taken at the start time.
7
QUANTITY AT INTERVAL
1. 5 AT 10 MINUTES
Enter the number of samples to occur at the first interval. The sampler is
to take samples at 10 minute intervals for one hour or 6 samples in the
first hour. Since the first sample is taken at the start time, the remaining
five samples will occur at the 10 minute intervals.
8
1. 5 AT 10 MINUTES
2. 3 AT 20 MINUTES
When you have completed the first entries, the display will “roll” to move
the first interval entries to the first line, and add the second line entries for
the next series of samples and intervals. Enter the next entries: “3” samples at “20” minutes.
9
2. 3 AT 20 MINUTES
3. 11 AT 30 MINUTES
10
SAMPLE VOLUMES OF
100 ml EACH (10 - 470)
11
ENTER START TIME?
[YES, NO]
12
PROGRAMMING SEQUENCE
COMPLETE
13
. . . STANDBY . . .
10:37:23 14-JUN-91
Press ENTER/PROGRAM to access the interactive state.
Access the program sequence by selecting “PROGRAM.”
Select “TIME.”
Select “NONUNIFORM.”
Select “YES” to modify the sequence of nonuniform time entries.
Enter the third set of samples and intervals, “11” samples at “30” minutes.
Enter “100” to set the sample volume at 100 ml.
Select “NO.”
After this message is displayed briefly, the sampler will automatically
return to the standby state.
Press the START SAMPLING key to run the program.
52
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
Run State Displays
Comment
14
SAMPLER INHIBITED!
10:35
15-JUN-91
This display appears while the actuator is inhibiting the sampler. The second line indicates the current time and date.
15
SAMPLE 1 OF 20
AT 11:26
11:25:47
This display appears when the sampler becomes enabled and counts down
the time remaining to the start time. The first line reports the number of
the upcoming sample event and the total number of sample events for the
routine. The second line reports the start time at the left and the current
time on the right.
SAMPLE 1 OF 20
When the start time occurs, the sampler will take the first sample. The
sample event cycle begins with a pre-sample purge.
16
SAMPLE 1 OF 20
PUMPING 100 ml
17
SAMPLE 2 OF 20
AT 11:36: 11:26:11
18
↓
↓
19
DONE . . .
8:10:35
As soon as the pump runs forward to deliver the sample volume, the message on the second line appears. This message remains through the postsample purge.
This display appears when the post-sample purge from the previous sample event is completed. It indicates the number of the upcoming sample
event. The second line displays the scheduled time for the next event on
the left; the current time is displayed on the right.
The cycle of displays is repeated until the sampling routine is done.
20 SAMPLES
16-JUN-91
When the routine is completed, this message appears. It reports the status
of the routine (“DONE”), the total number of sample events; and the current time and date.
Example 9 Nonuniform Times as Specific Clock Times
Nonuniform times can be entered in either the method shown in Example 8 or by specifying a clock time
and date for each sample. The abbreviated example below shows the displays used to enter the clock times.
(The type of display, clock time or minutes, used in the program sequence is controlled by the settings in
the Nonuniform Times configure option; you must specify either clock time or minutes.)
Step
No.
Display
Procedure
1
TAKE SAMPLES AT
1. 06:00 14-JUN
Enter the time and date for the first sample event. Times and dates are
entered on the second line of the display.
2
1. 06:00 14-JUN
2. 07:00 14-JUN
Enter the time and date for the second sample event. The controller will
guess a time at the hour succeeding the previously entered time.
3
2. 06:30 14-JUN
3. 07:00 14-JUN
Enter the time and date for the third sample event.
4
↓
↓
Continue to enter times and dates for each sample event. After all sample
event times have been entered, the sample distribution section of the programming sequence will appear.
53
3710R/3710VR/3750 Refrigerated Sampler
Example 10 Extended Time-paced Sampling Using Stops and Resumes
The following example programs the sampler to take time-paced 200 ml samples at uniform time intervals of
15 minutes starting at 6:00 am on the following day. The sampling is to continue from 6:00 am until 8:00 am.
The sampling will resume again at 11:00 am and continue until 1:30 pm. It will pause until 4:00 pm and continue until 6:00 pm.
When the sampling is stopped at 6:00 pm, 24 to 29 samples will have been taken. However, in this particular application, the number of samples is not important, so the sampler will be instructed to take samples
indefinitely. This is done by entering “0” in the Number of Samples display as demonstrated in step 7
below. Note: The Sampling Stop and Resumes configure option has settings which allow you to take a sample at the stop and resume times. See Sampling Stop/Resume on page 39.
Step
No.
Display
Procedure
1
. . . STANDBY . . .
10:34:50 14-JUN-91
2
[PROGRAM, CONFIGURE]
SAMPLER
3
[TIME, FLOW]
PACED SAMPLING
4
[UNIFORM, NONUNIFORM]
TIME INTERVALS
5
SAMPLE EVERY
0 HOURS, 10 MINUTES
Enter “0” to set the hours at zero. Press ENTER/PROGRAM to store the number “0” and move to the minutes entry.
6
SAMPLE EVERY
0 HOURS, 15 MINUTES
Enter “15” to set the minutes entry to 15.
7
0 COMPOSITE
SAMPLES ( 0-470)
8
SAMPLE VOLUMES OF
200 ml EACH (10 - 9400)
9
ENTER START TIME?
[YES, NO]
10
TAKE FIRST SAMPLE AT
06:00
15-JUN
11
5 STOP or RESUME
TIMES (0-24)
12
STOP SAMPLING AT
1. 08:00 15-JUN
13
RESUME SAMPLING AT
1. 11:00 15-JUN
Press ENTER/PROGRAM to access the interactive state.
Access the program sequence by selecting “PROGRAM.”
Select “TIME.”
Select “UNIFORM.”
Enter “0” so that the sampler will take samples until the last stop time or
until the weight table terminates the sampling routine.
Enter “200” to set the sample volume at 200 ml.
Select “YES.”
Enter the start time and date of the sampling program: 6:00 AM tomorrow.
Enter “5.” There are three stop times and two resume times.
Enter the time and date of the first stop time: 8:00 am.
Enter the time and date the program should resume: 11:00 am.
54
3710R/3710VR/3750 Refrigerated Sampler
Step
No.
Display
Procedure
14
STOP SAMPLING AT
2. 13:30 15-JUN
Enter the time and date of the second stop time: 1:30 pm or 13:30. You
must enter the times in military time.
15
RESUME SAMPLING AT
2. 16:00 15-JUN
Enter the time and date the program should resume: 4:00 pm or 16:00 in
military time.
16
STOP SAMPLING AT
3. 18:00 15-JUN
17
PROGRAMMING SEQUENCE
COMPLETE . . .
18
. . . STANDBY . . .
10:37:23 15-JUN-91
Enter the final stop time: 6:00 pm or 18:00 in military time.
After this message is displayed briefly, the sampler will automatically
return to the standby state.
Press the START SAMPLING key to run the program.
Run State Displays
Comment
SAMPLE 1 OF ? ? ?
AT 6:00
10:38:07
This display appears as the sampler counts down the time remaining to
the start time. The first line reports the number of the upcoming sample
event. The question marks, in the upper right, appear for routines which
will take an indeterminate number of samples. The routine will terminate
when the weight table is triggered. The second line reports the start time
at the left and the current time on the right.
SAMPLE 1 OF ? ? ?
When the start time arrives, the sampler will take the first sample. The
sample event cycle begins with a pre-sample purge.
SAMPLE 1 OF ? ? ?
PUMPING 500 ml
As soon as the pump runs forward to deliver the sample volume, the message on the second line appears. This message remains through the postsample purge.
21
SAMPLE 2 OF ? ? ?
AT 6:15 6:01:11
This display appears when the post-sample purge from the previous sample event is completed. It indicates the number of the upcoming sample
event. The second line displays the scheduled time for the event on the left.
The current time is displayed on the right.
22
↓
↓
19
20
23
DONE . . .
18:10:35
The cycle of displays is repeated until the sampling routine is done.
26 SAMPLES
16-JUN-91
When the routine is completed, this message appears. It reports the status
of the routine (“DONE”), the total number of sample events, and the current time and date.
55
3710R/3710VR/3750 Refrigerated Sampler
STANDBY STATE
PUMPING REVERSE . . .
A sampler in the standby state is waiting for your
instructions. From standby, you can start or
resume a sampling program, access the program
or configure sequences, take manual samples, and
use the DISPLAY STATUS key to review program settings or the results of a sampling routine.
When you press the STOP key, the sampler will display a message similar to the one illustrated in e.
This message indicates the total number of pump
counts that occurred while the pump was running.
This information can be used to set the desired
number of purge counts required to purge the suction line. See the Purge Counts configure option on
page 41. Press any key, except STOP and ON/OFF, to
return to the standby display.
A sampler in standby uses a number of displays to
communicate its status. Some of these displays are
associated with the function of a specific key; other
displays are used to notify you that a sampling
program is done, halted, or has encountered a
problem. The standby state displays and valid
keys are discussed below.
311 COUNTS FORWARD
- You can take manual samples
in standby by pressing the MANUAL SAMPLE key.
After you press the MANUAL SAMPLE key, the sampler will deliver the programmed sample volume.
A manual sample delivers the sample volume currently entered as a programmed setting, and
includes the pre-sample and post-sample purges.
It will also include any programmed rinses and
retries. The sampling process can be stopped with
the STOP key at any time. If you press the MANUAL
SAMPLE key while a sampling program is in
progress, the manual sample will be counted as
one of the programmed samples.
When you first turn the sampler on, the sampler
“wakes up” in the standby state. The standby display, illustration a, simply informs you that the
sampler is in standby and reports the current time
and date.
a
At this point, the following keys are operable: ON/
OFF, PUMP REVERSE, PUMP FORWARD, START SAMPLING, MANUAL
SAMPLE, DISPLAY
STATUS,
and
ENTER/PROGRAM.
While the sample is being delivered, the sampler
displays a message similar to that illustrated in f.
The second line will not appear until the pump
begins to pump forward to deliver the sample. The
display will revert to standby after the manual
sample has been delivered.
Program Halted
A sampling program can be halted with either the
STOP or EXIT PROGRAM key; if this occurs, the sampler will display the halt message shown in illustration b. If you halt the program to take a manual
sample or to change a setting in the program or
configure sequence, the sampler will return to
standby. If this is the case, you will not be able to
use the RESUME SAMPLING key.
. . . PROGRAM HALTED . . .
10:37:33 16-JUN-91
. . . MANUAL SAMPLE . . .
PUMPING 200 ml
f
- Once you have programmed
and configured the sampler, use the START SAMPLING key to run the sampling program. There are
two instances where the sampler will not be able
to run the program immediately. These occur when
the program has been started after the programmed start time or after one or more programmed stop times.
START SAMPLING
b
Each operable key is listed and discussed below.
ON/OFF - When in the standby state, this key sim-
ply shuts the sampler off.
When you press the START SAMPLING key after a
program has been halted, the sampler will give
you the choice between resuming the program and
starting the program by presenting the display
illustrated in g.
PUMP FORWARD and PUMP REVERSE - The
and PUMP REVERSE keys run the
pump forward or in reverse until you interrupt it
with the STOP key. While the pump is running, the
message illustrated in c or d is displayed, depending on the pumping direction.
PUMP FORWARD
PUMPING FORWARD . . .
e
MANUAL SAMPLE
Standby Display
. . . STANDBY . . .
10:37:23 16-JUN-91
d
[START, RESUME]
SAMPLING PROGRAM?
c
56
g
3710R/3710VR/3750 Refrigerated Sampler
trated in i. This message is displayed until you
press any key, at which time the display will
return to the standby message.
Select “START” to start the program from the
beginning. Select “RESUME” to resume the program at the point at which it halted. If you do not
make a selection from this display within 60 seconds, the sampler will automatically select the
currently blinking response. START will re-initialize the display status memory.
DONE . . .
10:37:33
i
Problem Occurred
- To resume or restart the program, press the RESUME SAMPLING or START SAMPLING key. When you press the RESUME SAMPLING
key, the program will resume at the point it was
halted. The display must read “PROGRAM
HALTED” for the RESUME SAMPLING key to be
active. If any samples were missed during the time
the program was halted, the sampler will inform
you with the message illustrated in h. The sampler
will initiate one sample event if one or more sample events were missed.
RESUME SAMPLING
2 SAMPLES WILL BE
SKIPPED
24 SAMPLES
16-JUN-91
You will be informed that a problem was encountered during the sampling routine with the message illustrated in j. This display will alternate
with the “DONE” display at approximately three
second intervals until you press any key.
PROBLEM OCCURRED . . .
PRESS DISPLAY STATUS
j
Float/Weight Tripped
3710R/3710VR/3750 Refrigerated Samplers use
the display k, to notify you that the program finished because the weight table was tripped. This
display alternates with the “DONE” display at
approximately three second intervals.
h
Additional Displays
There are three additional displays used in the run
state. The sampler will inform you it has completed a program by displaying the message illus-
FLOAT/WEIGHT TRIPPED
k
Example 11 Program Started Later than Programmed Start Time
Display
Display
No.
Procedure
PAST START TIME . . .
This display informs you of the expired start time. The sampler will
present this display for a short time, then advance to the next display.
1 SAMPLES WILL BE
SKIPPED
This display reports the number of samples which will be skipped if
you do not change the start time; it appears only if more than one sample event time has passed.
CHANGE START TIME?
[YES, NO]
142
Select “YES” if you want to change the start time. Select “NO” if
missed samples are acceptable.
TAKE FIRST SAMPLE AT
12:30
16-JUN
93
This display appears when you select “YES” in display #142 and a
sample event is to occur at the start time. Enter the new start time.
START FLOW COUNT AT
12:30
16-JUN
94
This display appears when you select “YES” in display #142 and no
sample is to occur at the start time for a flow-paced sampling routine.
Enter the new start time.
57
3710R/3710VR/3750 Refrigerated Sampler
Example 12 Program Started Later than Programmed Stop Time
Display
Procedure
PAST STOP TIME . . .
PLEASE REPROGRAM
This display informs you of the expired stop time. The sampler presents this display for a short time, then reverts to standby.
. . . STANDBY . . .
10:22:34
17-JUN
You must access the program sequence to change the expired stop and
resume times. Once you’ve made the changes, start the routine again
with the START SAMPLING key.
DISPLAY STATUS
• sampler ID.
• current time and date.
• program settings.
You can access a summary of the current program
settings and the results of the most recent sampling routine with the DISPLAY STATUS key. This
key is valid in both the run and standby states.
The summary of the program settings consists of a
number of informational displays describing the
settings. The results of the sampling program
include information about each sample event and
reports problems encountered during the program.
This information remains in memory until you
start another program.
You can retrieve this information with Isco’s Field
Printer or a laptop computer running Isco’s SAMPLINK software. Both methods produce two
reports which contain the sampler ID, current status, program settings, and sampling results.
If a sampling routine is in progress when you press
the DISPLAY STATUS key, the sampling routine will
be suspended. No samples will be taken until you
exit Display Status.
If the pump count reaches the number entered for
the Tubing Life Warning setting, the Pump Tubing
Warning will be displayed.
An illustration of the warning is shown below.
Each of these items is illustrated in Example 13.
When you press DISPLAY STATUS, the display
shown below follows the pump tubing warning. It
allows you to review the program settings or sampling results.
[REVIEW, PRINT]
PROGRAM INFORMATION
Display #148
Select “REVIEW” to review the program settings
and sampling results. The sampler will present
the display shown below. Use this display to leave
the display status procedure or to review the program settings or sampling results.
REVIEW PROGRAM [NO,
SETTINGS, RESULTS]
Display #150
Select “NO” to return to the previous operating
state. If you entered display status from standby,
the standby message will reappear. If you entered
display status from the run state, the sampling
routine will resume.
Select “SETTINGS” to review the program settings.
Use the LEFT ARROW, RIGHT ARROW, and the ENTER/
PROGRAM keys to move through the sampling settings. When the RIGHT ARROW or the ENTER/PROGRAM key is pressed at the last settings display, the
“REVIEW PROGRAM” display will reappear.
WARNING: REPLACE
PUMP TUBING!
DISPLAY STATUS AND REVIEWING OR
PRINTING PROGRAM INFORMATION
Select “RESULTS” to review the results of the
sampling routine. The first display reports the
time and date the sampling program started. Use
the LEFT ARROW, RIGHT ARROW, and ENTER/PROGRAM keys to move through the results. If the routine was finished at the time you pressed the
DISPLAY STATUS key, the last display will report the
time and date the routine ended.
The sampler tracks and reports the following
items:
• program start time and date.
• sample volume.
• source of each sample event.
• cause of any missed samples.
• start time of each sample event.
• number of pump counts to liquid detection for
each event.
• time the routine was completed.
58
3710R/3710VR/3750 Refrigerated Sampler
Flow - The sample event was one of the program’s
flow-paced samples.
Start - The sample event was initiated at the program’s start time.
Resume - The sample event was initiated to compensate for a missed sample which should have
occurred while the sampler was halted. If more
than one sample event was missed, only one sample will be taken.
Power - The sample event was initiated to compensate for a missed sample which should have
occurred while the sampler was without power. If
more than one sample was missed, only one sample will be taken.
Select “PRINT” from Display #148 to send the current status, program settings, or sampling results
to the Isco Field Printer. For information on the
reports produced by the Field Printer, refer to the
Field Printer Instruction Manual.
When you select “PRINT,” Display #149 appears.
Use this display to select the settings or results
report. (The sampler will interrupt the reports to
take a sample, if necessary.) Select “NO” to return
to standby.
PRINT PROGRAM [NO,
SETTINGS, RESULTS]
Display #149
The sampler will display one of two messages as it
sends the data to the printer. The first message
informs you that the transmission is in progress.
The second message is a warning which informs
you that the sampler is unable to detect the printer.
If you see the warning message, check the cable
connections between the printer and the sampler.
Enable - The sample event was initiated when the
sampler became enabled by a device connected to
pin F of the flow meter connector, generally a 3200
or 4200 Series Flow Meter, 4100 Series Flow Logger, or Liquid Level Actuator. This source is also
reported when the sample was initiated at a programmed resume time. Two different configure
option settings control this event: the Sample
Upon Enable setting in the Enable Pin configure
option and the Sample at Resume setting in the
Sampling Stop/Resume configure option.
. . . PRINTING . . .
PROGRAM INFORMATION
PRINT ABORTED
NO PRINTER DETECTED!
Manual - The sample event was initiated with the
key and was counted as one of the
programmed sample events.
MANUAL SAMPLE
SOURCE OF SAMPLE EVENT
Disable - The sample event was initiated when
the sampler became disabled by a device connected
to pin F of the flow meter connector, generally a
3200 or 4200 Series Flow Meter, 4100 Series Flow
Logger, or a Liquid Level Actuator. This source is
also reported when the sample was taken at a programmed stop time. Two different configure option
settings control this event: the Sample Upon Disable setting in the Enable Pin configure option and
the Sample at Stop setting in the Sampling Stop/
Resume configure option.
The display illustrated in step 6 of Example 13
shows the sample event number and the source of
the sample event. Source refers to the programmed
or configured setting that initiated the sample
event. For example, the sampler will report “TIME”
as a source if the sample was taken as one of the
program’s time-paced samples. Eight sources are
tracked and reported for a composite sampler:
Time - The sample event was one of the program’s
time-paced samples.
Example 13 Display Status: Results of Sampling Program
Step
No.
Display
1
DONE . . . 24 SAMPLES
12:34:50 20-JUN-91
2
[REVIEW, PRINT] PROGRAM
INFORMATION
Select “REVIEW.”
3
REVIEW PROGRAM [NO,
SETTINGS, RESULTS]
Select “RESULTS.”
Procedure
Press DISPLAY STATUS to view the results of the sampling program.
59
3710R/3710VR/3750 Refrigerated Sampler
Example 13 Display Status: Results of Sampling Program (continued)
4
5
6
7
PROGRAM STARTED AT
5:30 19-JUN-91
This display reports the start time and date of the program. Press ENTER/
PROGRAM to advance to the next display.
200 ml SAMPLES
This display reports the nominal sample volume. Press ENTER/PROGRAM to
advance to the next display.
SAMPLE 1 of 24
SOURCE: START
This display reports the number of each sample event. It also reports the
source of the event; in this case, the sample was taken at the start time.
Press ENTER/PROGRAM to advance to the next display.
TIME: 5:30
COUNTS:
16-JUN-91
280
This display reports the initiation time of the sample and the number of
pump counts to liquid detection in the sample delivery cycle. These values
indicate changes in the sampling conditions – head changes, for example.
Press ENTER/PROGRAM to advance to the next display.
8
↓
↓
9
PROGRAM FINISHED AT
12:00
20-JUN-91
Press ENTER/PROGRAM to return to the “REVIEW PROGRAM” display.
10
REVIEW PROGRAM [NO,
SETTINGS, RESULTS]
Select “NO” to return to standby.
11
. . . STANDBY . . .
15:39:50 19-JUN-91
Press ENTER/PROGRAM to continue to review the information for the
remaining sample events.
ERROR MESSAGES AND MISSED SAMPLES
Sampler Inhibited! - The sampler was prevented
from taking the sample by an inhibit signal sent to
the sampler by a Flow Meter or a Liquid Level
Actuator.
The probable cause of any missed sample is
reported after the sample number/source display.
A missed sample display is illustrated below.
Float/Weight Tripped! - Samplers detect overflow with a calibrated weight table supporting the
composite bottle in the refrigerator. If the liquid
level of the bottle raises the weight of the bottle
past the trip point, the sampler will interrupt the
sample event and record the “Float/Weight
Tripped” condition.
SAMPLE MISSED:
NO LIQUID DETECTED!
Ten causes are tracked and reported:
Pump ’STOP’ Key Hit! - The sampler was halted
with the STOP key during the sample event.
Pump Jammed! - The sampler was unable to
take the sample because the pump jammed.
No More Liquid! - The sampler was unable to
take the sample because, in attempting to take the
sample, the sampler pumped all liquid from the
flow stream.
Started Too Late! - The sampling routine was
started after the programmed start time for the
first sample. This message is reported for all samples skipped because of an expired start time.
No Liquid Detected! - The sampler was unable
to take the sample because no liquid was detected.
Program Halted! - The sampling routine was
interrupted by the STOP or EXIT PROGRAM key
when the sample event was to occur.
Sampler Shut 'Off'! - The sampler was unable to
take the sample because it was halted with the ON/
OFF key during the sample event.
Power Lost! - The sampler was unable to take the
sample because the sampler’s power source was
disconnected.
60
3710R/3710VR/3750 Refrigerated Sampler
RUN STATE
SAMPLE 17 OF 48
AT 6:00
5:42:33 *
A sampler in the run state is executing the sampler’s instructions according to the settings you’ve
entered in the program and configure sequences.
There is one condition under which the sampler
will enter the run state after the START SAMPLING
key is pressed, but will not begin the sampling program. If the sampler is interfaced with a 3200 or
4200 Series Flow Meter, 4100 Series Flow Logger,
Liquid Level Actuator, or other equipment capable
of transmitting an inhibit signal, the sampler will
not begin the program until the inhibit signal is
suspended. The sampler will use the following display to inform you that the sampler is inhibited.
To start a sampling program and place the sampler into the run state, press the START SAMPLING
key. While running the sampling program, the
sampler will present a number of displays which
allow you to monitor the sampler’s progress. The
displays are listed with a brief explanation in
Table 9.
If a problem is encountered while running a sampling routine which has resulted in missed samples, an asterisk will appear in the lower right
corner of the display, as illustrated below.
SAMPLER INHIBITED!
10:32
16-JUN
Table 9 Run State Displays: Composite Sampling
SAMPLE 1 OF 12
AT 6:00 5:43:33
Indicates the sample number of the next sample and the total number of
samples for time-paced routines. The current time is shown in the lower
right corner.
SAMPLE 1 OF 12
AFTER 10 PULSES
Indicates the sample number of the next sample and the total number of
samples for flow-paced routines.
SAMPLE 2 OF ???
AT 6:00 5:43:33
Indicates the sample number of the next sample. The question marks indicate the sampler will use the weight table to terminate the routine. The
second line reports the scheduled time of the upcoming sample event and
the current time.
SAMPLE 1 OF ???
AFTER 100 PULSES
Indicates the sample number of the next sample. The question marks indicate the sampler will use the weight table to terminate the routine. The
second line reports the number of flow pulses remaining until the next
sample event.
SAMPLE 2 OF 12
PUMPING 200 ml
Indicates a sample in progress.
61
3710R/3710VR/3750 Refrigerated Sampler
62
3710R/3710VR/3750 Refrigerated Sampler
Chapter 4 Routine Maintenance
ROUTINE MAINTENANCE
CLEANING
This chapter discusses routine maintenance necessary to keep the refrigerator in top operating condition. Included are sections on the weather and
corrosion resistance of the refrigerator and cleaning the refrigerator.
The following sections present information on
cleaning the sample bottles and pump tubing.
Information is also included for cleaning the
refrigerator’s interior, exterior, condenser coil, and
bottle locating base.
The 3710R/3710VR/3750, although ruggedly built
to withstand difficult field operating conditions,
will maintain maximum reliability when these
simple maintenance procedures are followed. As
with any piece of field operated equipment, a certain amount of preventive maintenance is necessary to keep it functioning properly.
Tubing
The Teflon suction line and the pump tubing can
be cleaned by placing the end of the suction line in
a cleaning solution and pumping this solution
through the tubing system using the PUMP FORWARD and PUMP REVERSE keys. Follow with a clean
water rinse.
WEATHER AND CORROSION RESISTANCE
Sample Bottles
The refrigerator’s exterior is fabricated from either
Type 304 brushed stainless steel or vinyl clad
steel. The remainder of the exposed metal parts
are either anodized or Iridited™ aluminum. The
controller cover and base are constructed from
ABS (acrylonitrile-butadiene-styrene) plastic, as is
the bottle locating base. The controller’s electronics and mechanisms are protected by a totally
sealed Noryl™ (polyphenylene oxide) control box.
The control box is rated at NEMA 4X, 6.
The bottles have a wide mouth to facilitate cleaning and can be washed with a brush and soapy
water or washed in a dishwasher. The glass bottles
can be autoclaved; however, the plastic lids and
bottles should not be autoclaved.
CLEANING PROTOCOLS FOR PRIORITY
POLLUTANTS
The following sections are excerpted from U.S. Environmental Protection Agency Publications EPA-600/
4-77-039 (“Sampling of Water and Wastewater” by
Dr. Phillip E. Shelley) to provide an example of sampler cleaning procedures for priority pollutants.
The 3710R and the stainless steel 3750 Refrigerator are designed to be operated in relatively hostile
environments. They may be directly exposed to
wet environments and still function properly. The
refrigerator’s mechanical and electrical components, and the sampler controller are protected
from rain, accidental spray, etc. The 3710VR and
the vinyl 3750 Refrigerator offer protection similar
to that of the stainless steel model, except to a limited degree. After prolonged exposure, the vinyl
clad steel exterior may begin to corrode. This will
not cause any functional problems though; only
the refrigerator appearance will be damaged.
Proper Cleaning
Proper cleaning of all equipment used in the sampling of water and wastewater is essential to
ensuring valid results from laboratory analysis.
Cleaning protocols should be developed for all
sampling equipment early in the design of the
wastewater characterization program. Here also,
the laboratory analyst should be consulted, both to
ensure that the procedures and techniques are
adequate, as well as to avoid including practices
that are not warranted in view of the analysis to
be performed.
If the refrigerator is to be operated out-of-doors, in
a corrosive atmosphere, or in a wet environment
for prolonged periods, it is highly advisable to further protect it with a fabricated shelter or instrument enclosure. Enclosures specifically made for
the 3710R/3710VR/3750 are available from COSYSCO (P.O. Box 4837, Walnut Creek, CA 94596,
415-947-5756) and Plasti-Fab (P.O. Box 100, Tualatin, OR 97062, 503-692-5460).
Cleaning Examples
As an example, Lair (1974) has set down the standard operating procedures for the cleaning of sample
bottles and field procedures equipment used by
USEPA Region IV Surveillance and Analysis field
personnel engaged in NPDES compliance monitoring. They are reproduced following for a typical automatic sampler and related sampling equipment.
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3710R/3710VR/3750 Refrigerated Sampler
wiped dry. Automotive wax may be applied to the
interior and exterior surfaces of the refrigerator to
make them easier to clean and more resistant to
corrosion. Do not direct a hose spray toward the
underside or into the front grille of the refrigerator. The vacuum formed plastic refrigerator interior and weight table may also be cleaned with
soapy water as necessary.
Isco Glass Sample Bottles:
1. One spectro-grade acetone rinse.
2. Dishwasher cycle (wash and tap water rinse, no
detergent).
3. Acid wash with at least 20 percent hydrochloric
acid.
4. Dishwasher cycle, tap and distilled water rinse
cycles, no detergent.
5. Replace in covered Isco bases.
Because the refrigerator uses a forced-air system for
cooling the compressor and condenser coil; dust, lint,
and other debris will be pulled into the unit and will
eventually accumulate on the condenser coil and
other components in the air circulation path. If the
refrigerator is not cleaned periodically, damage due
to overheated components may result.
Suction Line (1/4 or 3/8 inch Vinyl):
1. Do not reuse sample tubing. No cleaning
required. New sample tubing is to be used for
each new sampling setup.
2. Use Teflon tubing where samples for organics
are to be collected.
WARNING
Be sure to disconnect the refrigerator’s power before performing any service activities.
Isco Pump Tube:
1. Rinse by pumping hot tap water through tubing
for at least 2 minutes.
2. Acid wash tubing by pumping at least a 20 percent solution of hydrochloric acid through tubing for at least 2 minutes.
3. Rinse by pumping hot tap water through tubing
for at least 2 minutes.
4. Rinse by pumping distilled water through tubing for at least 2 minutes.
The condenser coil and surrounding areas should
be cleaned annually; more frequently under severe
operating conditions. To clean,
1. Remove the screws that hold the back panel on
to the refrigerator and remove the panel.
2. Vacuum the fan, compressor, and all of the surrounding areas.
3. Check the fan for freedom of movement. Oiling
the fan motor is not necessary because the
motor bearings are sealed. If the fan motor does
not rotate freely, it should be replaced.
4. Replace the back panel.
5. Remove the front grille. Vacuum the condenser
coil and surrounding areas.
6. Replace the grille.
Teflon Tubing:
1. Rinse twice with spectro-grade acetone.
2. Rinse thoroughly with hot tap water using a
brush if possible to remove particulate matter
and surface film.
3. Rinse thoroughly three times with tap water.
4. Acid wash with a solution of at least 20 percent
hydrochloric acid.
5. Rinse thoroughly three times with tap water.
6. Rinse thoroughly at least three times with distilled water.
7. Rinse thoroughly with petroleum ether and dry
by pulling room air through tubing.
8. Dry overnight in warm oven (less than 150° F),
if possible.
9. Cap ends with aluminum foil.
CLEANING THE BOTTLE LOCATING
BASE AND SAMPLE BOTTLES
The bottle locating base may be cleaned with soapy
water and a sponge.
The sample bottles have a wide mouth to facilitate
cleaning. The 2.5 gallon glass bottle may be
washed with a brush and soapy water then washed
in a dishwasher or autoclaved. The 2.5, 4, and 5.5
gallon polyethylene bottles may be washed with a
brush and soapy water or washed in a dishwasher,
but not autoclaved.
CLEANING THE REFRIGERATOR
The refrigerator’s exterior may be periodically
cleaned with soapy water using a sponge or nonmetallic brush to keep it free from corrosive solutions, grease, oil, etc. After cleaning, it should be
64
3710R/3710VR/3750 Refrigerated Sampler
REPLACEMENT OF PUMP TUBING
2. Detach the outer cases of the liquid detector and
pump by loosening the captivated thumbscrews
shown in Figure 15. This will expose the pump
tubing as shown in Figure 16.
3. Pull the tubing away from the detector. Extract
the tubing from the pump. The pump rollers can
be rotated manually to facilitate the removal of
the tubing. After the tubing is removed, clean
the interior of the pump case thoroughly.
4. Remove the suction line, if attached, and pull
the pump tubing from the pump tube port.
The pump tube serves two functions: it is a pump
tube in the peristaltic pump and a distribution
tube, routing the sample liquid from the pump outlet to the sample bottle. The pump tube consists of
a single 40.5 inch (104 cm) piece of medical grade
Silastic™ silicone rubber tubing. Medical grade
tubing is used because of its superior mechanical
properties and because it does not contain any
organic materials. Non-medical grade silicone rubber tubing can contain organic vulcanizing agents.
During the vulcanizing process, these agents are
converted into other compounds which can be
leached into the sample. The medical grade silicone rubber tubing supplied by Isco for use with
the sampler will not contribute any organic material to the sample.
INSTALLING A NEW PUMP TUBE
The steps below outline the procedure needed to
install a new pump tube.
1. The pump tube is marked with two black bands.
These bands are used to correctly locate the tubing in the detector and pump. Correct placement is critical to prolong the life of the pump
tube and to assure efficient operation and accurate sample volumes. Facing the liquid detector,
place the inner edge of the end band against the
upper left inlet of the liquid detector. Place the
inner band at the lower outlet of the liquid
detector. Figure 16 shows the correct placement of the tubing at the liquid detector.
2. Slip the pump tubing under the rollers so that
the pump tubing does not interfere with the
installation of the outer pump lid.
3. Replace the outer pump lid and tighten the four
thumbscrews.
4. Re-check the position of the marker bands and
adjust the tubing if the position of the bands
indicate the tubing has slipped.
5. Replace the outer case of the liquid detector. For
proper operation of the liquid detector, tighten
the thumbscrews securely.
6. Feed the free end of the tube down through the
pump tube port.
7. Re-install the suction line, as described in
Attaching the Suction Line on page 9.
8. Reset the Pump Tube count to zero. Refer to the
discussion of the Tubing Life configure option in
Tubing Life on page 41.
Inspection of Pump Tubing
The pump tubing is extremely durable. However,
the constant mechanical strain placed on the tubing by the peristaltic action of the pump will eventually cause the tubing to fatigue and fail. Inspect
the pump tubing periodically for wear inside the
pump by removing the cover. Check the tubing for
cracks where the pump roller compresses the tubing. Replace it with a new pump tube, if necessary.
The inspections should be fairly frequent when the
liquid being sampled contains a high percentage of
suspended solids. If the liquid is relatively free of solids, the inspections can be less frequent. The Tubing
Life configure option reports the number of pump
counts elapsed during the life of the pump tube.
The amount of tubing (13.5 inches) used in the
pump is less than half the total length of the pump
tube (40.5 inches). In some cases, when the tube
has not been damaged to the point of leaking, the
tube can be used twice by simply turning it around.
Note: The black bands used to assist you in correctly
positioning the tubing in the pump and detector are
placed on one end only. If you turn the tubing around,
you will not be able to use the bands for reference.
REMOVING THE PUMP TUBING
REPLACEMENT OF SUCTION LINE
To remove the tubing:
It may be desirable to replace the suction line for
one of several reasons. The suction line may be
worn, cut, contaminated, or otherwise damaged.
Periodically inspect it for damage. In critical sampling, it may be necessary to replace the suction
line between sampling programs to avoid cross
contamination.
1. Disconnect power from the unit.
CAUTION
Be sure power is disconnected from the unit before exchanging the pump tubing. The pump is
extremely powerful. If the sampler activates the
pump while you are manipulating the tubing, serious injury can result.
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3710R/3710VR/3750 Refrigerated Sampler
Figure 15 Liquid Detector and Pump Case
Liquid Detector
Captivated Thumb Screw
Pump Case
Figure 16 Interior of Liquid Detector and Pump Case
Pump Rotor
Machine Screw
Locate bands here to
place pump tubing correctly
66
Pump Shaft
3710R/3710VR/3750 Refrigerated Sampler
3/8
When sampling site conditions change, it may be
necessary to replace the suction line with a different diameter or type of line (vinyl or Teflon). The
vinyl suction line contains a very low PPM (parts
per million) level of phenols. If this affects your
samples, use the Teflon line.
The suction line is removed from the pump by loosening the clamp which secures the line to the
pump tube and pulling the suction line out of the
pump tube. If a new suction line (either with or
without the optional stainless steel strainer) is to
be used, it is installed as described in Attaching
the Teflon Suction Line to the Pump Tubing on
page 10. To install the optional stainless steel
strainer, heat the end of the suction line to make it
more flexible, then carefully screw the strainer’s
threaded connector into the suction line.
Cleaning Suction Line
The suction line and the remainder of the pump
tube system should be cleaned occasionally as
described in Tubing on page 63.
Replacement Vinyl Line
Replacement vinyl suction lines are available from
Isco in two forms. First, a complete suction line,
with strainer and tube coupling, is available in 10
ft. and 25 ft. lengths for each of the 1/4 inch and 3/8
inch ID (Inside Diameter) vinyl suction lines. Second, bulk suction line in the 1/4 inch ID and 3/8 inch
ID vinyl tube is available in 100 and 500 ft. rolls.
CHANGING THE INTERNAL DESICCANT
A humidity indicator, labeled “INTERNAL CASE
HUMIDITY,” is located in the lower left corner of
the control panel. It indicates the amount of moisture present inside the control box. The paper indicator is blue in a dry state.
Replacement Teflon Line
The control box is a completely sealed unit. (The
control box does not need to be opened during normal operation.) The desiccant should absorb any
moisture which may accumulate in the control box.
Thus, the humidity indicator should remain blue
under normal conditions. If moisture does accumulate, the numbered areas on the indicator will turn
light pink or white, starting with the area numbered “20.” This indicates that the relative humidity inside the control box exceeds 20%. As more
moisture accumulates, the areas numbered “30”
and “40” will turn light pink or white, indicating
relative humidities of 30% and 40%.
The 3/8 inch ID Teflon suction line is available from
Isco in line lengths of 10 and 25 feet.
1/4
AND 3/8 INCH
INCH ID TEFLON SUCTION LINE
ID VINYL SUCTION LINE
The following sections discuss the replacement of
the complete suction line-strainer assemblies, the
sizing of the suction line, and the assembly and
installation of the bulk tubing. The suction line is
removed from the pump tubing by detaching the
tube coupling, as described in Attaching the Suction Line on page 9. If a complete new suction linestrainer assembly of the standard 10 or 25 ft.
length is used, it should be installed as described
in Placement of the Suction Line and Intake on
page 10.
If the 30% area of the humidity indicator turns
light pink or white, the control unit should be
opened, inspected for leaks, and the desiccant
renewed. This is done by unscrewing the ten
screws (Figure 17) around the outer rim of the
control box bezel, and carefully lifting the bezel
and cover off the control box. The control box contains electronic circuitry which may be damaged
by static discharge. Open the control box only in a
static free environment.
Bulk Suction Line
If you are using bulk suction line to replace the old
line, detach the old line from the tube coupling and
remove the strainer. Cut the new suction line to
the desired length in one foot increments. The line
must be between 3 and 99 feet long. To insure
accurate sample volumes, it is important that the
line is cut in one foot increments and that the line
length is correctly entered in the Suction Line configure option. See Suction Line on page 34. Screw
the strainer into the new suction line.
Renewing the Desiccant
The desiccant is renewed by first removing the
bags of desiccant from the control box, as shown in
Figure 18. Then place a sheet of brown paper on a
flat metal sheet. You can use a brown grocery bag
and a typical cookie sheet. Place only the bags on
the sheet. Do not stack the bags on top of each
other or allow them to touch. Place in a vented, circulating forced air, convection oven in a well ventilated room. Allow two inches of air space between
the top of the bags and the next metal sheet above
the bags.
The new suction line can now be installed as
described in Attaching the Vinyl Suction Line to
the Pump Tubing on page 9.
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3710R/3710VR/3750 Refrigerated Sampler
To reassemble the controller, place the renewed
desiccant in the tray as shown in Figure 18. If you
have disconnected any wiring or the grounding
strap between the control box and the panel,
reconnect them. Before reinstalling the cover, coat
the cover’s gasket with a light film of silicone
grease to seal the control box. Tighten the ten
screws which hold the control box cover and bezel
in place using an even cross-torquing pattern.
Keep the sheets a minimum of 16 inches from the
heating element. Heat the bags at a temperature
of 240° to 250° F (116° to 121° C) for 12 to 16
hours. At the end of the time period, the bags
should be immediately removed and placed in an
airtight container for cooling. The desiccant will be
recharged to approximately 80% to 90% of its previous capacity. After repeated recharging, the desiccant bag may require replacement.
Some bags will have the temperature and time for
recharging printed on the bag. If they differ, use
the temperature and time printed on the bag.
Figure 17 Location of 10 Screws on Control Box Bezel
1 of 10 Screws
Humidity Indicator
68
3710R/3710VR/3750 Refrigerated Sampler
Figure 18 Control Box Internal Desiccant
69
3710R/3710VR/3750 Refrigerated Sampler
70
3710R/3710VR/3750 Refrigerated Sampler
Chapter 5 Options and
Interfacing Equipment
INTRODUCTION
NON-ISCO FLOW METERS
This chapter presents information regarding the
major options available with the 3710R/3710VR
Sampler. The following sections present a general
description of the options.
• Flow Meter Connections.
• Interface Devices.
• Model 1640 Liquid Level Actuator.
Certain non-Isco flow meters can be directly interfaced with the sampler. These are flow meters with
an isolated contact closure type output of at least
25 millisecond duration. The frequency of the contact closures must be directly proportional to total
flow.
The isolated contact closure from the flow meter
should be connected to pins A and C of the 6-pin
connector. Table 11 shows the pinouts required for
connecting a flow meter to the sampler. Figure 19
shows a diagram of the pin locations on the 6-pin
connector. Refer to the instruction manual of the
flow meter being used for further details.
FLOW METER CONNECTIONS
The sampler can collect samples on a flow proportional basis using flow inputs from an external flow
meter. The sampler requires a 5 to 15 VDC pulse of
at least 25 millisecond duration to register a flow
pulse. Flow meters are connected to the sampler by
attaching a flow meter connect cable to the flow
meter connector located on the control base. Figure
5 on page 11 shows the connector.
A connector and cable clamp to connect a non-Isco
flow meter to the sampler are available from Isco.
To wire the connector for contact closures, use pins
A and C. To wire the connector for pulses, use pin
C. When appropriately wired, attach the non-Isco
connector to the flow meter connector on the rear
of the sampler.
NOTE
If a connect cable is not attached to the flow
meter or printer connectors, be sure that the protective covers are tightly fastened in place.
A connector prewired to a 22-foot (6.7-meter) cable
terminating in two wires is also available. The
black wire is connected to pin A, and the white wire
is connected to pin C.
The sampler has an additional connector, labeled
“PRINTER,” used to connect the sampler to an
Isco Field Printer, Field Interrogator, or laptop
computer. Figure 19 shows the pin location diagram for the printer connector. (Note: Both the
flow meter connector and the printer connector use
the same 6-pin configuration.) The printer cable
connector accepts both the connector from the Isco
Field Printer and the cables from the laptop computer or 583 Field Interrogator. Table 10 shows
the pinouts for the printer connector.
Figure 19 Pin Location for 6-pin Connector
A
F
B
E
ISCO FLOW METER
Connect cables to connect the sampler to an Isco
flow meter, flow logger, or 2100 series flow module
are available. Refer to the Accessories List on page
97. To make the connection, attach the appropriate
cable connector to the flow meter according to directions in the flow meter instruction manual, and
attach the other connector to the 6-pin flow meter
connector on the rear of the control base, shown in
Figure 5 on page 11.
C
D
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3710R/3710VR/3750 Refrigerated Sampler
The actuator can be set to control the sampler in
two modes:
Table 10 6-Pin Printer Connector Wiring
Pin
Signal
A
+12 VDC
B
Common
C
Printer Sense
D
Transmit
E
Receive
F
NC
Latch Mode - The sampler continues the sampling routine even though the liquid level has
receded and liquid no longer contacts the sensor.
Toggle Mode - The sampler will halt the routine
when the liquid ceases to contact the sensor.
To connect the actuator to the sampler, attach the
actuator cable to the flow meter connector. Refer to
Figure 5 on page 11 for the location of the flow
meter connector. Refer to the Liquid Level Actuator Instruction Manual for additional information.
Table 11 6-Pin Flow Meter Connector Wiring
Pin
Signal
A
+12 VDC
B
Common
C
Flow Pulses In
D
Weight Table
E
Event Mark Out
F
Inhibit In
The sampler must be configured to respond to the
actuator. Refer to the discussion of the Enable Pin
configure option, Enable Pin on page 40.
INTERFACE DEVICES
The sampler can also be used with flow meters
having other types of outputs, for example, a 4 to
20 mA output directly proportional to flow rate.
However, these flow meters require a special interface device to convert their output signal into one
compatible with the sampler. Two interfaces are
available: the Type A Interface and the 4 - 20 mA
Sampler Input Interface. Each interface connects
to the flow meter connector. Consult the factory for
assistance in interfacing the sampler with nonIsco flow meters.
Type A Interface - Converts flow pulse duration
output from non-Isco flow meters to acceptable flow
pulses. The Type A interface is shown in Figure 20.
4-20 mA Sampler Input Interface - Converts 4 to
20 mA output signals from non-Isco flow meters to
acceptable flow pulses. The 4-20 mA Sampler Input
Interface is shown in Figure 21.
MODEL 1640 LIQUID LEVEL ACTUATOR
The Liquid Level Actuator is a device used to begin
a sampling routine when the liquid level of the
sample flow stream reaches a predetermined
height. The actuator is used to inhibit sampling
according to flow levels; i.e., if the level of the flow
stream falls below the actuator’s probe, the actuator will inhibit sampling until the level again rises
to contact the probe.
72
3710R/3710VR/3750 Refrigerated Sampler
Figure 20 Type A Interface
Figure 21 4-20 mA Sampler Input Interface
73
3710R/3710VR/3750 Refrigerated Sampler
74
3710R/3710VR/3750 Refrigerated Sampler
Chapter 6 Servicing
SERVICING INFORMATION
REFRIGERATION SYSTEM
This chapter presents refrigerator servicing information to assist you in correcting malfunctions
which may occur. Included are sections providing
information on the electrical and refrigeration systems, and on servicing the sampler’s controller. An
illustrated list of common replacement parts is
also included.
The refrigeration system is shown schematically in
Figure 22. Refrigerators before S/N 11901-001 are
charged with 8.5 ounces of R-12 refrigerant.
Refrigerators after S/N 11901-001 are charged
with 3.4 ounces of R-134a. All refrigeration repair
work must be performed by a qualified refrigeration technician.
The electrical system is discussed on page 75.
Figure 22 Refrigeration Schematic Diagram
The refrigeration system is discussed on page 75.
Capillary Tube
Servicing information for the electronic components is discussed on page 75.
ELECTRICAL SYSTEM
Condenser
Coil
Electrical circuit schematics for the refrigerator
and the sampler’s 12 VDC power supply are shown
in Figures 23 and 24.
Evaporator
Plate
Compressor
WARNING
Be sure to disconnect the refrigerator’s power
before performing any service activities.
SERVICING THE 3710 CONTROLLER
The electronic circuitry of the sampler controller is
solid-state and its reliability is high. If the unit
should fail to operate properly, items such as a broken or intermittent connection in the power cable
or wiring harness should be suspected.
You can gain access to the electrical and refrigeration components by removing the back panel of the
refrigerator. To gain access to the sampler controller’s 12 VDC power supply, place the refrigerator on
its side and remove the bottom plate and back panel.
If Serious Problems Occur
The refrigerator compressor is equipped with external overtemperature and overload protection, and
may fail to start immediately when power to the
unit is momentarily interrupted or when the thermostat setting is changed. It is normal for the overload relay to trip repeatedly in these instances, and
in no way indicates a malfunction.
If the sampler fails to operate properly, call the Isco
Technical Service Department. The service department will provide information on how to return the
sampler to the factory for repair. For example, the
pump assembly or control box can be removed and
returned separately for servicing. Contact:
Technical Service Department
Isco, Inc.
P.O. Box 82531
Lincoln, NE 68501 USA
Toll free: (800) 228-4373 (USA, Canada, & Mexico)
Phone: (402) 464-0231
75
3710R/3710VR/3750 Refrigerated Sampler
Figure 23 3710R/3710VR/3750 Electrical Schematic – From S/N 196C01812
BLK
RED
THERMAL
CUTOUT
COMPRESSOR
M
COMPRESSOR
FAN
M
GRN
GRN
E
F
C
WHT
A
B
D
BLK
EXTERNAL FLOWMETER
CONNECTOR
ON CONTROL BASE
F
D
POWER PACK
CABLE TO SAMPLER
CONTROLLER
A
B
C RED
E
GRN
BRN
WHT
WHT
BLK
12V
GRN
BLK
WHT
TB1
76
117 VAC
COM.
WEIGHT TABLE
MICROSWITCH
10.1A
N.C.
N.O.
BOTTLE FULL
LIGHT
BRN
WHT
+
BLK
+12VDC
B A
WHT
3710R/3710VR/3750 Refrigerated Sampler
Figure 24 3710R/3750 Electrical Schematic – Before S/N 196C01812
2753006
77
3710R/3710VR/3750 Refrigerated Sampler
INSTALLING A 3710 CONTROLLER ON THE
3750 REFRIGERATOR
more than two inches of pump tubing should be
suspended in the bottle. Cut off any excess
pump tubing.
5. Connect the two-pin connector on the power
cable to the 12 VDC plug on the controller and
the six-pin connector on the flow meter cable to
the flow meter connector.
The 3750 Sampler Refrigerator is available to convert a 3710 Portable Sampler into a 3710R or a
3710VR Refrigerated Sampler. To do this, remove
the control box from the portable sampler following the instructions in the 3710 Portable Sampler
Instruction Manual. Because of the longer distance between the pump discharge and the sample
bottle in the refrigerator, the standard 36 inch (92
cm) pump tube must be replaced with the 40.5
inch (104 cm) pump tube supplied in the mounting
kit. The new pump tube may be installed following
the instructions in Installing a New Pump Tube on
page 65 of this manual.
ACCESS TO ELECTRONIC COMPONENTS
To gain access to the electronic components housed
in the control box:
1. Disconnect the power source from the sampler.
2. Remove the 10 screws around the outer edge of
the control box bezel.
3. Lift the cover and bezel off the control box and
turn it over, as shown in Figure 26.
4. The control box cover assembly may be disconnected from the control box lower section by disconnecting the four connectors (see Figure 26)
and the grounding strap.
5. The main circuit board assembly of the 3710
Sampler is protected by an aluminum shield. To
remove this shield, unscrew the stop nut that
holds the short grounding strap and unscrew
the four screws located in each corner of the
shield. Lifting the shield off will then reveal the
main circuit board shown in Figure 27.
6. To remove the circuit board assembly from the
control box cover, unscrew the four hex threaded
stand-offs and the phillips head screw, indicated
in Figure 27. The circuit board may now be
pulled away from the control box cover.
7. To completely disconnect the circuit board
assembly from the cover, disconnect the connector shown in Figure 27.
Once the new pump tube is installed, use the parts
supplied in the controller mounting kit and follow
the instructions below to prepare and mount the
controller on the refrigerator. Refer to Figure 25.
1. Turn the controller upside down and screw the
four, threaded mounting rods into the four corner feet of the controller. The two middle feet
are not used. The controller can now be
installed on the refrigerator.
2. Open the controller cover on the top of the
refrigerator and orient the controller on the top
of the unit so the peristaltic pump and liquid
detector face the front of the refrigerator.
3. Carefully insert the threaded rods into the four
mating holes on the refrigerator and push the
controller down until it is resting on the refrigerator. Working inside the refrigerator, install the
spacers and wing nuts on the four threaded rods.
4. Feed the pump tube down through the tubing
feed through into the interior of the refrigerator
and route the pump tube into the bottle. No
Figure 25 Mounting the Control Box
TUBE GUIDE PORT
THREADED ROD
WASHER
FLAT WASHER
LOCK WASHER
WING NUT
3713048
78
3710R/3710VR/3750 Refrigerated Sampler
Figure 26 Underside of the Control Box Cover
Phillips Head Screw (1 of 4)
Stop Nut
Disconnect Four Connectors
Shield
Figure 27 Main Circuit Board
Hex Stand-off
(1 of 4)
Phillips Head
Screw
Connector
79
3710R/3710VR/3750 Refrigerated Sampler
REMOVAL OF THE PUMP GEAR CASE
ASSEMBLY
5. Remove the pump rotor by loosening the
machine screw and locknut attaching the rotor
to the pump shaft. Figure 16 on page 66 shows
the location of the machine screw. Rotate the
rotor until you can reach the screw with a
screwdriver inserted through the pump case
inlet sleeve.
6. Slide the rotor off the pump shaft.
7. Remove the pump case by unscrewing the four
screws on the back of pump’s inner case.
8. Disconnect the grounding strap between the
pump gear case and the shut-off microswitch
assembly.
9. Lift the pump gear case assembly out of the control box.
The pump gear case assembly is located in the
lower section of the control box. To gain access to
the lower section of the control box, follow the
instructions in Access to Electronic Components on
page 78. Use the following steps to remove the
pump gear case.
1. Remove the two nuts, the screw, and the
grounding strap indicated in Figure 28.
2. Lift the plastic tray straight up out of the control box.
3. Remove the liquid detector lid and the pump lid
by loosening the captivated thumbscrews on the
pump exterior. Figure 15 on page 66 shows the
location of the thumbscrews.
4. Remove the pump tubing from the interior of
the pump.
Reverse these step to reassemble the controller.
Ensure that all hardware, straps, and connectors
are secure.
Figure 28 Control Box Tray Removal
Nut
Nut
Grounding Strap
Screw
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3710R/3710VR/3750 Refrigerated Sampler
PRECAUTIONS FOR SERVICING CMOS
CIRCUITRY
A 12 VDC connector on the side of the control box
is used to connect to an external 12 V source. A
3.75 Amp PTC device provides circuit protection.
Most of the circuitry in the sampler controller is
made up of CMOS components. Because of the
oxide gate structure of these devices, they are
extremely susceptible to destruction from the discharge of static electricity through their inputs.
The 3710 controller contains two printed circuit
boards: the main board and the pump control
board. The display module (attached to the main
circuit board) also contains a small circuit board.
This module is purchased assembled and does not
contain any user-serviceable parts. Unless it is
being replaced, do not disturb the display module.
CAUTION
Main Board
• Disconnect power from the refrigerator and
controller when working on the unit.
Power is supplied to the circuitry through P4 – pin
1 is ground and pin 2 is 12 V. A 5 V switching regulator (IC U11) is used to obtain a 5 V rail from the
12 V supply. All of the ICs used in the 3710 controller get their operating power from the 5 V rail. IC
U11 is also used as a low voltage detector – it constantly monitors the 12 V supply. IC U17, a voltage
converter, provides a -5 V supply which is needed
for some components.
IC U8 is the microprocessor, IC U5 is the ROM,
and IC U7 is the RAM. These three ICs make up
the “brains” of the 3710 controller. The microprocessor executes the program stored in ROM. While
executing, information (program settings, sample
data, etc.) is retrieved from and stored in RAM. A
4.608 MHz crystal oscillator (Y1) sets the microprocessor's execution speed.
The 3710 controller keeps track of time with a real
time clock (IC U3). Both the RAM and IC U3 are
battery-backed with a lithium battery (B1). IC U1
is a switch which selects between battery and system power.
Three devices allow the microprocessor to communicate with the outside world: the 2 line, 20 characters per line LCD, IC U9, and IC U18. The LCD
allows for communication with the user and is connected through P3. IC U13, transistor Q2, thermistor R15, and other components provide the LCD
with a temperature compensated driver voltage. By
providing temperature compensation, the display
quality is optimized over a wide temperature
range. IC U9 and IC U18 are I/O devices which
allow the microprocessor to: read the keypad,
sound the beeper, count pump counts, and so on.
A 23 position keypad, connected at P5, is used to
direct the microprocessor through the program.
Many discrete components along with IC U9 are
used to decode pressed keys. All user-originated
instructions to the 3710 controller enter the system through the keypad.
The 3710 controller is supplied with a liquid detection system that gives it the ability to accurately
deliver specified sample volumes.
• Keep yourself grounded when handling disassembled equipment.
PRELIMINARY ELECTRONICS
TROUBLESHOOTING STEPS
Following are suggested areas to check before
attempting to service the microprocessor CPU and
associated circuitry. These checks should be made
before looking at the CPU and memory.
1. Supply voltage is correct.
2. Wiring harnesses, connectors, and solder joints
are in good condition.
3. Appearance of physical damage, such as burned
or broken components, overly hot components,
or evidence of water damage.
4. Shorted or open diodes and transistors, especially driver transistors.
5. Voltage regulators working properly.
6. Excessive current draw in the circuitry.
7. Correct input signals to unit.
8. Crystal oscillator operating at proper frequency.
9. Reset circuitry working properly.
CIRCUIT BOARDS
The following is a general description of the 3710
controller’s electronic circuitry. While reading this
description, refer to the schematic diagrams and
the pictorial views of the circuit boards in Figures
29 through 32.
The 3710 controller is a microprocessor-based
device which executes a program stored in ROM.
The program (software) is a series of instructions
that tell the microprocessor what to do in order to
accomplish the various functions which the sampler must perform. The software is discussed only
as is necessary to describe the operation of the circuitry (hardware).
81
3710R/3710VR/3750 Refrigerated Sampler
The pump motor control consists of a 2-pole double-throw relay (K201) and transistor switches
(Q201, Q202 and Q203). The relay is used to
change the pumping direction and will run the
pump in the reverse direction when in the rest
state. Each time the pump runs, the microprocessor sends the pumping direction signal through
pin 1 of P7, waits for the relay to change state,
then starts the pump by sending a high signal
through pin 3 of P7. Waiting for the relay to
change state before applying power prevents arcing at the relay contacts.
The liquid detection system consists of a piezoelectric sensor and filtering circuitry. The sensor,
mounted on the exterior of the control box, produces a signal proportional to an induced strain on
the pump tubing. This signal is routed through P8
to IC U15 and its associated circuitry where it is
massaged into a YES or NO indication of liquid
presence. IC U15, containing a switched capacitor
low pass filter and two Op Amps, is the main circuit component of the detection system.
An RS-232 serial communications port is connected to the system at P9. This port is used to
output sampler status, program settings, and sampling results to a printer or an interrogator. IC
U21, IC U19, and a handful of discrete components
are used to transmit serial information, receive
serial information, and sense the presence of the
externally connected device.
A key element of the pump revolution count sensor
is the LED-phototransistor device (IC201). Whenever the pump is running, power is supplied to
IC201. A rotating disk positioned between the
LED and phototransistor periodically interrupts
the transmitted signal. These interruptions create
pulses which are sent back to the main board at
pin 8 of P7 to be counted. The microprocessor uses
these counts to determine the pumped volume.
Pump Control Board
The pump control board is an integral part of the
pump assembly and serves two functions: control
the pump motor and sense pump revolutions.
Figure 29 Optical Counter PCB Component Layout
201
202
203
Q201
204
Q202
R201
R202
205
R203
208 209
R204
206
207
C
201
212
211
D
201
P201
210
K201
IC201
82
3710R/3710VR/3750 Refrigerated Sampler
Figure 30
Main Circuit Board Schematic Diagram
+5
+5
+5
VP
2200UF
31
D3 >>
30
D4 >>
29
D5 >>
28
D6 >>
27
D7 >>
PC1
D4
PC2
D5
PC3
D6
PC4
D7
PC5
GND
PC7
PC6
7
14
>> C4
>> C3
>> C2
>> C1
15
16
17
13
COL 4
COL 3
C19
Q0
C29
15UF
C32
1N4002
CR9
CR7
GND
R71
8
U20
DISTRB
HC32
255*
U16
CR2
1
2
1N914
8
FI
R35
U16
3
4
2.2K
1N914
40106
U16
11
40106
10
+5
40106
40106
GND
2
VO2
CR3
GND
10K
4
GND
8
GND
+5
9
470
U16
40106
R39
22M
1
DIST.MTR+
2
DIST.MTR-
3
BTL LED
4
XTR
5
BTL SW2
6
KEY
7
BTL SW1
8
GND
P6
GND
R38
6
5
U16
100K
+5
+5
R51
-I2
GND
R44
DIST.MTR.GND
9
10
R37
GND
R42
R77
5.1K
1K
DIST.MTR.+
10
PIEZO
GND
1N4002
CR8
1N4002
R56
1K
TP4
11
C31
R73
GND
A2
3
2N6290
7
VO1
+I2
1
COL 1
Q1
12
LMF60
1
2
Q2
3
2N6290
R55
12
10
R34
.47UF
ADJ
FO
14
P8
KEYBOARD
COL 2
Q3
A1
SAMPLER
FULL
13
C24
PC0
D3
4099
A0
TP5
14
R36
D2
25
CR
-I1
3
GND
24
7
15
330PF
PB7
23
6
Q4
Q8
100K
PB6
D1
22
LSH
U15
20
21
-V
CI
+I1
13
TP2
+5
5
Q5
U18
1
R40
32
D2 >>
D0
19
Q6
WD
2
1
GND
470
C28
33
D1 >>
5
18
DAT
4
Q6
2N3704
10K
34
D0 >>
GND
37
3
Q7
Q7
330PF
PB5
2
1
330PF
PB4
3
Q17
2N3704
1
9
+V
510K
PB3
9
R41
PB2
U9
6
11
510K
PB1
HC32
GND
.1UFB
CS
2
ROW 5
ROW 6
A2 >>
.1UFB
RST
2
2N6109
2
R67
PB0
KEYBOARD
ROW 4
22M
RST
38
R43
C26
PA6
39
A0 >>
2
GND
TP3
1M
A0
1
40
.1UFB
3
C25
.1UFB
3
R29
6
I/O1CS >>
PA5
PA7
35
RST >>
PA3
A1
U20
10K
ROW 3
R28
A0 >>
WR
PA4
9
ROW 2
604K*
8
2
2
2
A1 >>
1
.1UFB
68.1K*
36
A1 >>
PA2
R74
3
Q14
GND
GND
GND
Q13
1
2N6109
>> RST
-5
C23
ROW 1
10K
/WR >>
RD
1
2N3704
1
C22
.1UFB
C12
GND
PA1
5
/RD >>
>> /RST
HC14
GND
+5
<< R1
<< R2
<< R3
<< R4
<< R5
<< R6
3
1
CR6
GND
GND
1K
3
Q9
390
HC14
3
5.1K
R66
100K
R8
8
D0 >>
4
C20
1N5818
C17
R7
5
GND
9
1N4002
GND
8211
6
GND
1
GND
U10
5
OUT
R50
R48
Q5
U10
TLD
4
HC14
R60
2
I/O2CS >>
PA0
VP
VP
390
10K
U6
3
12
8
V+
+5
Vcc
VP
GND
C8
1K
13
HYS
RST >>
26
100UF
R22
51K
R19
R21
C14
.1UFB
2.2M
33UF
CR1
GND
BEEPER
6.8UF
100
2N3704
GND
GND
C33
MASTER/
SLAVE
1.2
GND
1K
U10
R14
5.1K
GND
GND
3
3
GND
5.1K
C27
.1UFB
R32
C30
R58
7660
C-
+5
R6
R33
2
1.2
1N5818
+5
2
187K*
R31
C3
GND
2
1
499K*
WEIGHT
TABLE
680
R57
POWER
C+
R59
R30
R26
33K
VP
CR16
GND
+5
.1UFB
4
C41
2N3702
Q3
2N3704
.1UFB
R27
10K
C11
R12
10K
Z1
.1UFB
3
1
2200UF
WHT
R25
5.1K
3
BLK
GND
GND
.1UFB
5
KEY
GND
U17
2
4
330UH
5
OUT
GND
GND
2
C16
"C"
GND
GND
V+
DS1
Q4
Z2
6
GND
7
Vfb
+5
L1
5
Lx
638
GND
GND
R16
7
"D"
3
2
220K
8
"E"
2N6290
8
CMP
U11
LBI
4
3
-5
8
.1UFB
1
Vo
LBO
3
1
1N4736
"F"
HC14
+Vs
2
EVENT MARK
2
BOTTLE
NUMBER
P4
6
Q12
VP
U10
100K
1N4736
Z6
Z5
ICTE15
Z4
ICTE15
Z3
ICTE15
GND
ICTE15
1K
1K
1K
FLOW PULSE
1
1
.1UFB
GND
R11
2
2N3702
R47
INHIBIT
R13
2
499K*
1
2N3704
+5
C18
R18
C13
1N914
5.1K
2
40106
VP
Q10
100K*
1
4
HC14
VP
1
3
R61
U19
3
10K
1
Q11
1N914
U10
R9
3
CR4
2
R46
CR5
.01UF
R10
10K
C10
R45
GND
12
DIST. POS
11
GND
BTL. FULL
10
+5
82C55A
5
2
HC32
BACKLIGHT
4.7K
4.7K
R64
R64
4.7K
R70
GND
GND
50
13
CR12
53
<< C3
470
R62
CR13
49
1N914
45
60
6
1N914
C37
C39
330PF
330PF
<< C4
470
65
59
C36
C38
330PF
330PF
61
9
8
/RST >>
4
6
56
GND
HC32
47
46
9
U12
9
10
A10
CK1TE0
A11
CK0DR0
A12
ST
A13
U8
RX1
A14
RX0
A15
64180
RT0
A16
HLT
A17
BAK
TOUT/
LIR
A18
A19
REF
D0
TE1
D1
NMI
D2
RST
D3
IN1
D4
RXSCT1
D5
CD0
XTL
CT0
XTL
4
Vss
3
Vss
1
Vss
2
D6
Vss
18
D7
36
-
U20
5
TLO62
6
U12
13
HC32
HC32
11
U19
11
25
26
27
28
29
30
31
32
33
35
37
38
39
40
41
42
43
44
A1 >>
A0 >>
GND
GND
GND
83
GND
5
4
A2 72421
D3
A1
D2
A0
D1
D0
12
13
14
Sb
GND
Pb
3
6
<< /RST
GND
PUMP COUNTS
12
200*
13
470
U16
/ORDRAMCS'
3
U2
2
GND
HC32
NC
GND
HC32
+5
GND
GND
GND
GND
GND
+5
8
GND
+5
A0 >>
>> A19
A1 >>
>> D0
>> D1
>> D2
>> D3
>> D4
>> D5
>> D6
>> D7
A2 >>
A3 >>
A4 >>
A5 >>
A6 >>
A7 >>
A8 >>
A9 >>
A10 >>
A11 >>
A13 >>
12
11
10
9
8
7
6
5
27
26
23
25
4
28
29
3
2
A0
Vcc
A1
Vpp
A2
PGM
A3
NC
A4
D0
A5
D1
A6
D2
A7
D3
A8
U5
D4
A9
D5
A10
D6
A11
D7
A12
A13
OE
A14
CE
A15
A16
Vss
3
+V
2
7
A0 >>
31
30
13
14
15
17
18
19
20
21
24
22
<< D0
<< D1
<< D2
<< D3
<< D4
<< D5
<< D6
<< D7
A1 >>
A2 >>
A3 >>
GND
A4 >>
A5 >>
A6 >>
A7 >>
A8 >>
A9 >>
A10 >>
A11 >>
<< /RD
<< /ROMCS
A12 >>
10
9
8
7
6
5
4
3
25
24
21
23
2
14
16
A0
Vcc
A1
A2
CS1
-
A3
CS2
A4
OE
A5
WE
A6
A7
U7
D0
A8
D1
A9
D2
A10
D3
A11
D4
A12
D5
D6
Vss
D7
27
11
12
13
15
16
17
18
19
R24
3
<< A13
<< /RD
<< /WR
1
2N3704
<< D0
<< D1
<< D2
<< D3
<< D4
<< D5
<< D6
<< D7
6264
A19 >>
/ME >>
2
3
1
VCC
Q0
A
Q1
B
U4
E
Q2
Q3
4
5
GND
A8 >>
A9 >>
/IOE >>
8
A0 >>
4
10
A1 >>
5
11
6
12
6
14
13
15
8
GND
A
B
E
Q0
U4
GND
Q2
Q3
HC139
GND
Q1
11
A12 >>
7
8
12
11
10
9
>> I/O1CS
>> I/O2CS
>> /RTCCS
10
4081
10
14
1
U14
HC14
U14
9
1
GND
U10
>> /ROMCS
HC139
GND
NOTE: * DENOTES 1% RESISTORS
FOR PCB# 603703245
C21
7
3
13
16
A17 >>
P3
2
9
GND
.1UFB
+5
GND
+5
Q2
22K
GND
20
22
7612
4
28
26
6
U13
32
1
2
+
2
4081
3
GND
1
PUMP FWD/REV
2
KEY
3
PUMP ON/OFF
4
VOL LED
5
KEY
6
+5V
7
GND
8
VOL CNT
P7
/RAMCS
7
GND
27C101
GND
13
1
GND
<< D3
<< D2
<< D1
<< D0
11
U20
14
R5
R4
7673
R52
C34
11
NC
40106
R72
.01UF
A3
4
NC
220K
CS1
5
U1
12
R49
U3
15
C7
.1UFB
GND
6
9
A16 >>
+5
7
VDD
16
Vs
7
10K
A2 >>
A15 >>
4.6MHZ
10
40106
GND
24
A3 >>
A14 >>
11
GND
GND
12
4
23
A12 >>
Y1
7
U21
C5
+
22
WR
17
Vo
R17
A9
TXS
21
VDD
Vp
6.49K*
CKS
20
RD
100*
A8
22PF
12
HC32
DR1
GND
5
6
U2
A7
HC32
8
HC32
A6
IN2
C6
U2
8
A5
IN0
22PF
U2
11
CLK
ALE
2
C15
1N914
R62
A4
/WR >>
8
10
CSO
3
6.8UF
<< C2
470
TX0
19
/RD >>
VDD
R15
54
A3
17
STD
R20
55
1N914
TX1
16
/RTCCS >>
2
R23
CR11
A2
>> A0
>> A1
>> A2
>> A3
>> A4
>> A5
>> A6
>> A7
>> A8
>> A9
>> A10
>> A11
>> A12
>> A13
>> A14
>> A15
>> A16
>> A17
1
3.74K*
57
<< C1
470
A1
15
8
OPT
CR10
NC
A0
18
30K
58
IOE
1
.1UFB
12
ME
+V
C9
10
E
14
B1
68
TP1
GND
RD
62
BATT
48
BRQ
WR
63
+5
.1UFB
51
Vcc
64
C1
52
WT
67
C2
7
66
.1UFB
C43
5
C42
C44
330PF
C45
330PF
330PF
C46
330PF
C47
330PF
330PF
34
15UF
+5
>> R2
4.7K
R62
>> /ME
>> /IOE
C4
4.7K
KEYPAD
R62
KEY
8
PUMP
+V
R1
+5
51K
>> R1
R64
+12
TRANSMIT
7
GND
+5
R64
2
1
6
+5
>> /WR
>> /RD
>> R3
4
4.7K
GND
5
-5
>> R4
6
3
KEY
4
GND
R63
Q15
10K
U19
2N3702
>> R5
5
RECEIVE
3
10K
CR14
3
-5
GND
39
SENSE
2
P9
3
1N914
1
4
C40
TLO62
1
2
8
7
40106
GND
R76
-
>> R6
R64
CR15
110
U21
2
R69
2N3704
1
R75
0012UF
4081
100K
1
+
10K
+5
1N914
R68
100K
3
40106
GND
9
13
HC32
5
U19
Q16
R64
10
10
VP
8
4
P5
5
5
11
12
2
3
4
6
13
6
U12
U19
13
GND
8
12
40106
D40C2
1
10
8
U14
1
10K
4
U19
9
Q1
3
PRINTR
R53
6
2
3
2
40106
+5
P1
10K
VP
P2
R54
VP
4081
C35
4
+5
3
U12
U14
6
330PF
R3
6.8
5.1K
R2
1
GND
DISPLAY
<< D0
<< D1
<< D2
<< D3
<< D4
<< D5
<< D6
<< D7
3710R/3710VR/3750 Refrigerated Sampler
Figure 31 Main Circuit Board Component Layout
OUT
OUT
OUT
OUT
OUT
OUT
84
3710R/3710VR/3750 Refrigerated Sampler
Figure 32 Case Schematic Diagram
TO CPU
P7
PUMP
205
01
02
03
04
05
06
07
08
201
212
R203
5.1K
209
210
211
R202
5.1K
4
Q202
TIP121
3
1
R204
75
2W
R201
1K
PUMP FWD/REV
KEY
PUMP ON/OFF
VOL LED
KEY
+5V
GND
VOL CNT
2
IC201
H21A1
203
8
9
10
202
204
5
6
2N5881
7
208
D201
1N4002
C201
.1UF
COM
207
1N4744
(X2)
4
+12V
1
P201
.047UF
(X3)
Q201
TIP121
K201
01
02
03
04
05
06
07
08
206
1
2
M
PUMP MOTOR
C
NO
NC
SHUT-OFF
MICROSWITCH
FERRITE
BEAD
FOR PCB# 603703249
+
P1
B
B
RXE375
ICTE15
MR821
POWER IN
P2
A
A
+12V
IN
POWER
01
02
03
04
05
06
07
08
P7
PIN 1
TO CPU
P8
PIN 2
P3
A
FLOWMETER
B
P4
B
C
A
D
WHT
BLK
KEY TO CPU
P4
"C"
"D"
"E"
"F"
F
E
FLOWMETER
PRINTER
P5
A
PRINTER
B
P6
B
C
A
D
F
E
PRINTER
P10
+12
+12 TO PUMP
P9
COM
GND
COM
FERRITE
BEAD
85
TO P201
01
02
03
04
05
06
07
08
GRAY
BLU
KEY
TO CPU
P9
YEL
KEY
BTL SW2
GND
TO CPU
P6
3710R/3710VR/3750 Refrigerated Sampler
SAMPLE EVENT CYCLE AND DELIVERY
OF SAMPLE VOLUMES
Sample Delivery
The sample pumping portion of a sample event
consists of three parts: suction line fill, liquid
detection, and sample volume delivery. The sampler counts the number of pump revolutions as the
suction line fills. At liquid detection, the controller
uses that count to determine the proper number of
pump revolutions required to deliver the programmed sample volume. It is important to note
that the volume delivered by a peristaltic pump
can be influenced by a number of factors other
than those discussed above. Thus, even with the
sophistication of the sample volume measuring
functions of the sampler, the volume of sample
deposited in the sample bottle may vary from the
programmed value. The repeatability of a sample
volume from sample to sample (which normally is
the most important consideration) will typically be
within the ± 10 ml specification stated in Table 1,
on page 6.
The sequence of steps in a typical sample event is
described below. Should you suspect a malfunction
in the delivery of the sample volumes, this information will assist you in determining the point at
which the problem occurs.
1. A sample event is initiated.
2. The pump rotates in the reverse direction to air
purge the suction line inlet of any debris.
3. The pump direction changes, pumping in the
forward direction to fill the suction line.
4. After the suction line has been filled to the
pump inlet, the sample measuring portion of the
sampling cycle begins. The pump continues to
rotate in the forward direction until the programmed sample volume has been delivered.
5. The pump direction again changes, pumping in
the reverse direction to air purge the suction
line to avoid cross-contamination of samples.
The pump then shuts off.
6. The sampler waits until another sample event
is initiated and the cycle begins again at step 1.
An illustrated list of common replacement parts
for the 3710R/3710VR/3750 follows in the replacement parts appendix. When ordering a replacement part, be sure to include the Isco part number,
a complete description, and the serial number of
the unit on which the part is to be used. The controller and the refrigerator are serialized separately. The controller serial number is located on
the side of the unit and the refrigerator serial
number is located on the inside of the door.
Peristaltic Pump
The following is a brief description of the method
by which the sample volume is determined. The
sampler uses a peristaltic pump to transport the
sample from the source to the sample bottle. When
compared with other suction lift sample gathering
methods, a peristaltic pump has numerous advantages: simplicity, reliability, no metering chamber
required, easily cleaned, etc.
A list of options and accessory parts described
throughout this manual can be found in Appendix B. When ordering an option or accessory, be
sure to include the part description and the Isco
part number.
Volumetric Determination
The sampler determines the volumetric delivery of
its peristaltic pump by electronically counting revolutions of the pump rotor. Each revolution of the
pump rotor corresponds to a fixed number of
“pump counts” and a certain volume of sample liquid. However, the volume of liquid delivered by
one revolution of the pump rotor changes with the
suction head and the type of suction line. At each
sample event, the liquid detection system automatically compensates for changes in suction head
and adjusts the volume delivered for each revolution of the pump. Thus, for a given type of suction
line, each revolution of the pump rotor results in
the delivery of a known amount of sample volume.
86
3710R/3710VR/3750 Refrigerated Sampler
Appendix A Replacement Parts
87
3710R/3710VR/3750 Refrigerated Sampler
88
3710R/3710VR/3750 Refrigerated Sampler
89
3710R/3710VR/3750 Refrigerated Sampler
90
3710R/3710VR/3750 Refrigerated Sampler
91
3710R/3710VR/3750 Refrigerated Sampler
DRAWING NO: 60-3713-076
REVISION: D
SHEET 4 OF 6
EFFECTIVE DATE: 02015
REPLACEMENT PARTS LIST
ITEM
NUMBER
PART
NUMBER
18
60-3704-151
CIRCUIT BOARD ASSEMBLY, POWER SUPPLY CONNECTIONS
19
60-3704-156
BACK PLATE ASSEMBLY WITH GASKET, CE
20
60-3714-026
CONTROL BOX MODIFICATION ASSEMBLY
21
60-1473-057
SEAL GASKET, 6 PIN AMP
22
140-1006-00
PLUG, PANEL MOUNT, 6 PIN
23
149-1001-00
DUST COVER #14
24
60-3704-091
PRINTER CONNECTOR ASSEMBLY
DESCRIPTION
25
140-1002-01
PLUG, PANEL MOUNT, 2 PIN
26
60-1393-082
SEAL GASKET, 2 PIN AMP
27
60-3703-252
DESICCANT TRAY, CE
28
60-3704-154
PUMP GEAR CASE ASSEMBLY, CE
29
202-1001-35
O RING 1.925 ID, .103 CROSS SECTION BUNA-N
30
202-9999-03
LIP SEAL, .375 ID X .750 OD
31
60-3704-019
PUMP HOUSING ASSEMBLY, INSIDE
32
60-3703-012
PUMP HOUSING BUSHING
33
231-9145-12
SCREW, MACHINE, 8-32 X ¾ SELF SEAL, SST
34
60-2704-019
PUMP ROTOR ASSEMBLY
35
60-3704-017
PUMP HOUSING ASSEMBLY, OUTSIDE (INCLUDES ITEM 60)
36
60-3704-021
DETECTOR LID ASSEMBLY
37
60-3704-022
DETECTOR BASE ASSEMBLY
38
202-4012-37
O RING, 1.237 ID, .103 CROSS SECTION, SILICONE
39
60-3714-047
CONTROL BOX SUB ASSEMBLY, CE
40
231-0195-08
SCREW, MACHINE, 8-32 X ½ SELF SEAL, SST
41
60-2703-170
STANDOFF, 6-32 X .25 HEX X 3.00 LONG, MALE, SST
42
60-3714-017
SHORT STANDOFF ASSEMBLY
43
60-3714-045
SHUTOFF MICROSWITCH ASSEMBLY, CE
59
60-3703-256
INTERCONNECT STRAP, 2.25”
60
60-3703-278
PUMP HOUSING BUSHING
92
3710R/3710VR/3750 Refrigerated Sampler
93
3710R/3710VR/3750 Refrigerated Sampler
DRAWING NO: 60-3713-076
REVISION: D
SHEET 6 OF 6
EFFECTIVE DATE: 02015
REPLACEMENT PARTS LIST
ITEM
NUMBER
PART
NUMBER
44
60-2703-037
PUMP SHAFT SPACER PLATE
45
60-2703-050
PUMP PLATE
46
60-2703-058
SPACER, .380 ID X 1.00 OD X .060 LONG, DELRIN
DESCRIPTION
47
60-2703-096
STANDOFF, 6-32 X .25 SQUARE X .75 LONG, MALE, SST
48
60-2704-010
PUMP SHAFT ASSEMBLY
49
60-2703-076
FLANGED BEARING, .275 ID X .625 OD X .31 LONG
50
60-3704-160
MOTOR PLATE ASSEMBLY, CE
51
60-2703-063
PUMP SHAFT OPTICAL DISK
52
60-3704-172
PUMP MOTOR W/FILTER ASSEMBLY
53
60-2704-039
CIRCUIT BOARD ASSEMBLY, COUNTER
54
60-2704-048
MOUNTING PLATE ASSEMBLY, OPTICAL COUNTER
55
402-0258-01
TRANSISTOR, 2N5881/2N5882
56
201-3112-00
FLANGED BEARING, .189 ID X .314 OD X 1/8 LONG
57
60-2704-008
PUMP GEAR SHAFT ASSEMBLY
58
237-1150-00
STANDOFF, 6-32 X 3/16 ROUND X ¾ LONG, FEMALE, ALUMINUM
94
3710R/3710VR/3750 Refrigerated Sampler
SINGLE BOTTLE
SAMPLING
2.5 GALLON
GLASS
2.5 GALLON
PLASTIC
1
2
4
3
7
5.5 GALLON
PLASTIC
4 GALLON
PLASTIC
4
5
4
6
ITEM
INVENTORY NO.
DESCRIPTION
1
603004193
LID & LINER ASSY
2
603004184
LID & LINER MOD ASSY 120MM
3
291000000
BTL GLS 2-1/2 GAL W/CAP BALE
4
601623027
LID MOD, PLS BTLS
5
299001306
BTL NALGENE 5-1/2 GAL W/CAP
6
299001305
BTL NALGENE 4 GAL W/CAP
7
299001304
BTL NALGENE 2-1/2 GAL W/CAP
60-3713-069
95
3710R/3710VR/3750 Refrigerated Sampler
96
3710R/3710VR/3750 Refrigerated Sampler
Appendix B Accessories List
GENERAL ACCESSORIES
2.5 gallon polyethylene container with cap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299-0013-04
2.5 gallon glass container with cap and Teflon liner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-2700-005
4 gallon polyethylene container with cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299-0013-05
Extra Silastic pump tubing, 40.5" length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3714-018
Model 3710 Sampler controller with pump tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-3750-005
Extra Pocket Guide, Model 3710R/3710VR/3710FR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3713-049
Extra Silastic pump tubing, bulk 10' length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-6700-046
Extra Silastic pump tubing, bulk 50' length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-6700-047
Plastic graduated cylinder, 1000 ml, for sample volume calibration. . . . . . . . . . . . . . . . . . . . . . . 299-0020-00
SUCTION LINES AND STRAINERS
1/4"
ID x 10' vinyl suction line with stainless steel strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3704-067
ID x 25' vinyl suction line with stainless steel strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3704-068
3
/8" ID x 10' vinyl suction line with stainless steel strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3704-071
3/8" ID x 25' vinyl suction line with stainless steel strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3704-072
3/8" ID x 10' Teflon suction line with protective coating, without strainer . . . . . . . . . . . . . . . . . . 60-1683-146
3
/8" ID x 25' Teflon suction line with protective coating, without strainer . . . . . . . . . . . . . . . . . . 60-2703-114
1/4" stainless steel strainer only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2903-081
3/8" stainless steel strainer only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2903-079
Weighted strainer only, 3/8", all plastic CPVC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3704-066
1/4" ID vinyl tubing, bulk 100'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1680-055
1/4" ID vinyl tubing, bulk 500'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1680-056
1
/4" ID vinyl tubing, bulk 1000'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1680-057
3/8" ID vinyl tubing, bulk 100'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1680-058
3/8" ID vinyl tubing, bulk 500'. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1680-059
1
/4" Vinyl suction line accessory kit (required for 1/4" suction lines) . . . . . . . . . . . . . . . . . . . . . . . . 68-3700-006
3/8" Vinyl suction line accessory kit (required for 3/8" suction line). . . . . . . . . . . . . . . . . . . . . . . . . 68-3700-007
1/4"
POWER SOURCES
Model 913 High Capacity Power Pack (120-volt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1684-088
Model 914 Battery-Backed Power Pack (120-volt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-130
Model 923 High Capacity Power Pack (240-volt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1684-093
Model 924 Battery-Backed Power Pack (240-volt) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-160
Model 934 Nickel-Cadmium Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1684-040
Model 946 Lead-Acid Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-106
Model 948 45-Amp-Hour Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-3000-948
Portable 12-volt DC, 6-Amp Battery Charger for 948 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . 341-0118-12
Model 961 Battery Charger (120-volt). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-059
Model 965 Five Station Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-3000-965
Model 954 Solar Panel Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-3000-027
Additional Solar Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-3000-028
Solar Panel Cable (25-foot Length) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-097
Solar Panel “Y” Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-098
97
3710R/3710VR/3750 Refrigerated Sampler
Solar Panel/Interrogator. Extension Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2544-028
Connect cable, for external 12 VDC power source; terminates in heavy duty battery clips . . . . 60-1394-023
INTERFACING EQUIPMENT
Model 1640 Liquid Level Actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1644-000
Extra Instruction Manual, Model 1640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1644-009
Connect Cable, 25’ Isco Sampler to Isco Flow Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3004-107
Connector only, without cable, for use with non-Isco flow meters having an
isolated contact closure proportional to flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68-1680-060
Same as above, with 22' cable terminating in two wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1394-077
2100 Series Sampler Interface Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2004-260
Type A Interface (converts pulse duration flow meter output proportional to
flow into pulses acceptable to Isco samplers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-1784-007
4-20 mA Sampler Input Interface (converts analog signal flow meter output
as specified by user into pulses acceptable to Isco samplers) . . . . . . . . . . . . . . . . . . . . . . . . 60-3704-037
FLOWLINK 4® Software with Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2544-058
SAMPLINK Sampler Interrogation Software with Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-3774-013
Interrogator communications line kit - 9 pin (connects laptop computer with
9 pin serial port to sampler) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2544-044
Interrogator communications line kit - 25 pin (connects laptop computer with
25 pin serial port to sampler) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-2544-040
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3710R/3710VR/3750 Refrigerated Sampler
Appendix C Display Index
Note: To access the display number, press the STOP key while the sampler displays the screen in question.
The display numbers are available in the Standby and Program states.
Disp.
No.
Display
Description
[PROGRAM, CONFIGURE]
SAMPLER
This display appears after you press the ENTER/PROGRAM key while in
standby. Select “PROGRAM” to access the program sequence. Select “CONFIGURE” to access the configure sequence.
----- COUNTS FORWARD
This informational display appears when you stop the pump with the STOP
key after having pressed the PUMP FORWARD key. It reports the number of
pump counts detected while the pump was in operation. Exit this display
by pressing any key except STOP and ON/OFF.
----- COUNTS REVERSE
This informational display appears when you stop the pump with the STOP
key after having pressed the PUMP REVERSE key. It reports the number of
pump counts detected while the pump was in operation. Exit this display
by pressing any key except STOP and ON/OFF.
10
[TIME, FLOW]
PACED SAMPLING
This display appears after you select “PROGRAM” in Display #1. Select
“TIME” for time-paced sampling, “FLOW” for flow-paced sampling.
11
[UNIFORM, NONUNIFORM]
TIME INTERVALS
This display appears only in the extended programming mode and follows
Display #10 when you have selected “TIME.” Select “UNIFORM” for uniform time intervals, “NONUNIFORM” for nonuniform time intervals.
20
MODIFY SEQUENCE?
[YES, NO]
This display follows Display #11 when you have selected “NONUNIFORM.” Select “YES” to modify the existing nonuniform intervals. Select
“NO” to leave the nonuniform intervals unchanged.
21
SAMPLE EVERY
-- HOURS -- MINUTES
In the basic programming mode, this display appears after you have
selected “TIME” in Display #10. In the extended programming mode, this
display appears when you have selected “UNIFORM” in Display #11. Enter
the uniform time interval. Two entries are required: the first entry sets the
hours, the second sets the minutes.
22
SAMPLE EVERY
---- PULSES (1 - 9999)
This display follows Display #10 when you have selected “FLOW.” Enter
the flow pulse interval.
25
TAKE --- SAMPLES
(1 - MAX)
This display follows Display #20 when you have selected “YES” to modify
the nonuniform time interval sequence. Enter the number of sample
events to occur at nonuniform time intervals. MAX varies according to the
bottle size entered in Display #223.
26
TAKE SAMPLES AT
1. HH:MM
DD-MMM
This display follows Display #25. Enter the nonuniform clock times and
dates for each sample event.
27
QUANTITY AT INTERVAL
1. -- AT --- MINUTES
Enter the number of samples to be taken at each interval. The total quantity
entered will be one less than the total number of samples because the first
sample, taken at the start time, counts as one. For example, if 19 samples
are to be taken (the first 6 at 20 minute intervals, the next 9 at 30 minute
intervals, and the remaining 3 at 45 minute intervals); first enter a quantity
of 6 at 20 minutes, a quantity of 9 at 30 minutes, and then 3 at 45 minutes.
Figure 33 shows a time line for the sampling routine.
1
3
3
99
3710R/3710VR/3750 Refrigerated Sampler
Figure 33 Time Line
1
3
2
20
20
4
20
5
20
6
20
7
20
6 intervals of 20 minutes
9
8
30
30
10
30
11
30
12
30
13
30
14
30
15
30
9 intervals of 30 minutes
Start Time
16
30
17
45
18
45
19
45
Event
No.
Interval
3 intervals of
45 minutes
Disp.
No.
Display
Description
50
SAMPLE VOLUMES OF
--- ml EACH (10- MAX)
Enter the size of the sample volume. MAX will vary according to the number of samples per bottle and bottle size.
60
--- COMPOSITE
SAMPLES (0 - MAX)
Enter the number of composite samples. An entry of “0” will instruct the
sampler to take samples until the weight table terminates the sampling
routine.
70
SUCTION HEAD OF
-- FEET (1 - MAX)
This display appears when you have selected “YES” in Display #242 or
have selected “DISABLE” in Display #240. Enter the measured suction
head. MAX will be the smaller of the suction line length or “20.”
80
CALIBRATE SAMPLE
VOLUME? [YES, NO]
This display appears in the program sequence when you have selected
“ENABLE” in Display #290. Select “YES” to use the calibration sequence,
“NO” to omit the calibration sequence.
81
PRESS MANUAL SAMPLE
KEY WHEN READY . . .
This display is part of the calibration sequence. Press the MANUAL SAMPLE
key when a collection bottle is underneath the pump tube.
82
--- ml VOLUME
DELIVERED
This display is part of the calibration sequence. When it first appears, it
reports the programmed sample volume. If the measured volume differs
from the reported volume, enter the measured volume here.
83
---ml! ARE YOU
SURE? [YES, NO]
This display is part of the calibration sequence and appears if the measured volume and the programmed volume differ by a factor of two or
more. Select “YES” to confirm the number entered in Display #82. Select
“NO” to return to Display #82.
90
ENTER START TIME?
[YES, NO]
Select “YES” to enter a start time. Select “NO” to begin the sampling routine according to the delay set in Display #310.
91
TAKE FIRST SAMPLE AT
HH:MM DD-MMM
This display appears for time-paced routines when you have selected
“YES” in Display #90. Enter the start time and date for the first sample
event. This display will also appear if you have initiated the routine after a
programmed start time so that you can reprogram the start time.
92
START FLOW COUNT AT
HH:MM DD-MMM
This display appears for flow-paced routines when you have selected “YES”
in Display #90. Enter the start time and date for the flow pulse countdown.
This display will also appear if you have initiated the routine after a programmed start time so that you can reprogram the start time.
100
-- STOP or RESUME
TIMES (0 - 24)
This display appears when you have selected “ENABLE” in Display #300.
Enter the number of stop and resume times.
100
3710R/3710VR/3750 Refrigerated Sampler
Disp.
No.
Display
Description
101
STOP SAMPLING AT
1.HH:MMDD-MMM
This display appears when the setting in Display #100 is greater than zero.
Enter the appropriate stop time.
102
RESUME SAMPLING AT
1.HH:MMDD-MMM
This display appears when the setting in Display #100 is greater than one.
It follows Display #101. Enter the appropriate resume time.
140
[START, RESUME]
SAMPLING PROGRAM
This display appears when a routine is halted and you press the START
SAMPLING key. Select “START” to start the sampling program at the beginning, “RESUME” to continue the sampling program at the point at which it
was halted.
142
CHANGE START TIME?
[YES, NO]
This display appears when you have started a routine after the programmed start time. Select “YES” to enter a new start time. Select “NO” to
start the routine immediately; some sample events may be missed or late.
148
[REVIEW, PRINT] PROGRAM
INFORMATION
This display appears after you press the DISPLAY STATUS key. Select
“REVIEW” to view the summary of the current program settings and for
sampling results. Select “PRINT” to send the current status, program settings, and sampling results to an Isco Field printer. The printed results
include data for sample events completed at the time you pressed the DISPLAY STATUS key.
149
PRINT PROGRAM [NO,
SETTINGS, RESULTS]
This display appears after you select “Print” in Display #148. Select “NO”
to return to standby. Select “Settings” to print the settings report. Select
“RESULTS” to print the results report.
150
REVIEW PROGRAM [NO,
SETTINGS, RESULTS]
This display appears after you select “REVIEW” in display #148. Select
“NO” to return to the previous operating state. Select “SETTINGS” to view
the summary of the current program settings. Select “RESULTS” to view
the sampling results for sample events completed at the time you pressed
the DISPLAY STATUS key.
SETTINGS DISPLAYS
Display #151 is used to identify the displays used to summarize the current program settings which appear when you select “SETTINGS” in Display #150.
RESULTS DISPLAYS
Display #152 is used to identify sampling results displays which appear
when you select “RESULTS” in Display #150.
SELECT OPTION (← → )
Display #200 is used to identify the displays which locate each configure
option in the configure sequence. Press ENTER/PROGRAM to access the input
displays for each option. Use the LEFT ARROW and the RIGHT ARROW keys to
move through the options.
151
152
200
NAME OF CONFIGURE OPTION
210
HH:MM DD/MM/YY
HH:MM DD/MM/YY
Set Clock configure option. Enter the time and date to set the controller's
clock. Use military time. Enter two digits each for the day (DD), month
(MM), and year (YY).
220
[PORTABLE, REFRIG.]
SAMPLER
Bottle Size configure option. Select “PORTABLE” when you are using a
3710 Portable Sampler. Select “REFRIG.” when you are using a 3710
refrigerated sampler.
223
BOTTLE VOLUME IS
----- ml
Bottle Size configure option. Enter the bottle volume in milliliters.
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3710R/3710VR/3750 Refrigerated Sampler
Disp.
No.
Display
Description
224
---- ml . . . ARE YOU
SURE? [YES, NO]
Bottle Size configure option. This display appears when you have entered a
bottle volume, in Display #223, that exceeds a standard Isco bottle size.
230
SUCTION LINE ID IS
[1/4, 3/8] INCH
Suction Line configure option. Select “1/4” if you are using 1/4 i n c h suction
line, “3/8” if you are using 3/8 inch suction line.
231
SUCTION LINE IS
[VINYL, TEFLON]
Suction Line configure option. This display appears when you have
selected “3 / 8 ” in Display #230. Select “VINYL” if you are using vinyl suction line, “TEFLON” if you are using Teflon suction line.
232
SUCTION LINE LENGTH
IS -- FEET (3 - 99)
Suction Line configure option. Enter the length of the suction line. The
length should not include the tube coupling or the strainer.
240
[ENABLE, DISABLE]
LIQUID DETECTOR
Liquid Detector configure option. Select “ENABLE” to turn the Liquid
Detector on, “DISABLE” to turn the Liquid Detector off. If you turn the
detector off, you will be required to enter the suction head (Display #70) in
the program sequence.
- RINSE CYCLES (0 - 3)
Liquid Detector configure option. This display appears when you have
selected “ENABLE” in Display #240. Enter the number of rinse cycles.
Rinse cycles condition the suction line to reduce cross contamination.
242
ENTER HEAD MANUALLY?
[YES, NO]
Liquid Detector configure option. This display appears when you have
selected “ENABLE” in Display #240. Select “YES” to add the suction head
setting (Display #70) to the program sequence. Select “NO” to omit the suction head setting.
243
RETRY UP TO - TIMES
WHEN SAMPLING (0 - 3)
Liquid Detector configure option. This display appears when you have
selected “ENABLE” in Display #240. Enter the number of retries: the number of times the sampler will try to detect the presence of liquid for each
sample event.
250
[BASIC, EXTENDED]
PROGRAMMING MODE
Programming Mode configure option. Select “BASIC” if you want to use the
basic programming mode. Select “EXTENDED” if you want to use the
extended programming mode.
255
LOAD PROGRAM
[#1, #2, #3, NONE]
Load Stored Program configure option. Select the sampling program you
want to use. Select “NONE” to exit the display without loading a program.
260
SAVE PROGRAM AS
[#1, #2, #3, NONE]
Save Current Program configure option. Select the number you want to use
to identify the current program with when saved. Select “NONE” to exit
the display without saving a program.
270
TAKE SAMPLE AT START
TIME? [YES, NO]
Flow Mode Sampling configure option. This setting affects flow-paced sampling routines. Select “YES” to take the first sample at the start time, “NO”
to take the first sample at the end of the first flow pulse interval.
280
ENTER INTERVALS IN
[CLOCK TIME, MINUTES]
Nonuniform Time configure option. Select “CLOCK TIME” to enter the
nonuniform time intervals as clock times (Display #26). Select “MINUTES”
to set the nonuniform intervals in minutes (Display #27).
241
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3710R/3710VR/3750 Refrigerated Sampler
Disp.
No.
Display
Description
290
[ENABLE, DISABLE]
CALIBRATE SAMPLER
Calibrate Sampler configure option. Select “ENABLE” to add calibration
displays to the program sequence. Select “DISABLE” to omit the calibration displays.
300
[ENABLE, DISABLE]
SAMPLING STOP/RESUME
Sampling Stop/Resume configure option. Select “ENABLE” to add the
Sampling Stop and Resume settings to the program sequence. Select “DISABLE” to omit the settings.
301
SAMPLE AT STOP?
[YES, NO]
Sampling Stop/Resume configure option. This display appears when you
have selected “ENABLE” in Display #300. Select “YES” to take a sample at
stop times. Select “NO” if no sample event is desired at the stop times.
302
SAMPLE AT RESUME?
[YES, NO]
Sampling Stop/Resume configure option. This display appears when you
have selected “ENABLE” in Display #300. Select “YES” to take a sample at
the resume times. Select “NO” if no sample event is desired at the resume
times.
310
---- MINUTE DELAY
TO START (0 - 9999)
Start Time Delay configure option. Enter the amount of time, in minutes,
you want to delay the start time. This entry affects programs that do not
have a programmed start time.
321
SAMPLE UPON DISABLE?
[YES, NO]
Enable Pin configure option. Select “YES” to take a sample at the time the
sampler becomes disabled. Select “NO” if no sample event is desired when
the sampler becomes disabled.
322
SAMPLE UPON ENABLE?
[YES, NO]
Enable Pin configure option. Select “YES” to take a sample at the time the
sampler becomes enabled; i.e., ceases to receive an inhibit signal from a Flow
Meter or a Liquid Level Actuator. Note: No sample will be taken if the enable
signal is used to initiate the start time delay countdown. Select “NO” if no
sample event is desired when the sampler becomes enabled.
323
RESET SAMPLE
INTERVAL? [YES, NO]
Enable Pin configure option. Select “YES” to restart the sample interval
countdown at the time the sampler becomes enabled. If “NO” is selected,
the interval countdown is determined by the setting in Display #324.
324
INHIBIT COUNTDOWN?
[YES, NO]
Enable Pin configure option. This display appears when “NO” was selected
in Display #323. Select “YES” to freeze the sample interval when the sampler becomes disabled. The interval countdown will continue from the
point at which it was stopped when the sampler is enabled. Select “NO” to
allow the sample interval countdown to continue while the sampler is disabled.
330
[CONTINUOUS SIGNAL,
PULSE]
Event Mark configure option. Select “CONTINUOUS SIGNAL” to send a
variable duration event mark signal out pin E of the flow meter connector.
Select “PULSE” to send a 3 second event mark signal.
331
DURING [PUMP CYCLE,
FWD PUMPING ONLY]
Event Mark configure option. This setting appears when you have selected
“CONTINUOUS SIGNAL” in Display #330. Select “PUMP CYCLE” to
transmit the event mark signal during the entire pump cycle, including
any programmed rinses and retries. Select “FWD PUMPING ONLY” to
send the signal when the pump is delivering a sample volume only.
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3710R/3710VR/3750 Refrigerated Sampler
Disp.
No.
Display
Description
332
AT THE BEGINNING OF
[PURGE, FWD PUMPING]
Event Mark configure option. This setting appears when you have selected
“PULSE” in Display #330. Select “PURGE” to transmit an event mark signal to a flow meter at the beginning of the pre-sample purge. Select “FWD
PUMPING” to transmit a signal when the pump switches forward to
deliver the sample volume.
340
--- PRE-SAMPLE
COUNTS (0 - 9999)
Purge Counts configure option. Enter the number of pre-sample pump
counts needed to purge the suction line. This value is set to 150 when the
controller is re-initialized.
341
--- POST-SAMPLE
COUNTS (0 - 9999)
Purge Counts configure option. Enter the number of post-sample pump
counts needed to purge the suction line. The number that initially appears
in this display is derived by the controller from the suction line ID and
length entered in Display #'s 230 and 232.
350
------ PUMP COUNTS,
WARNING AT ------
Tubing Life configure option. This informational display is used to communicate the number of pump counts elapsed since the last reset and the
number of counts required to trigger the Pump Tubing Warning. Exit this
display by pressing any key.
351
RESET PUMP COUNTER?
[YES, NO]
Tubing Life configure option. After changing the pump tube, select “YES” to
reset the pump counter to zero. Select “NO” to leave the counter unchanged.
352
------ PUMP COUNTS
TO WARNING
Tubing Life configure option. Enter the number of pump counts required to
trigger the pump count warning if the factory setting is not suitable. This
value is set to 500,000 when the controller is re-initialized.
360
[ENABLE, DISABLE]
PROGRAM LOCK
Program Lock configure option. Select “ENABLE” to turn the program lock
on. If you enable the program lock, input displays are protected by a passnumber: 3710. The controller will not allow you to make any changes to a
program or configure sequence setting until you enter the pass-number
when requested. Select “DISABLE” to turn the program lock off.
365
SAMPLER ID NUMBER IS
----------
Sampler ID configure option. Enter the sampler ID (identification) here.
The sampler will accept up to ten characters, including periods (press
RESUME SAMPLING), dashes (press MANUAL SAMPLE), and spaces (press
START SAMPLING).
371
RE-INITIALIZE?
[YES, NO]
Run Diagnostics configure option. Select “YES” to re-initialize the controller: the entire RAM – with the exception of the configure option settings for
current pump count total, bottle size, suction line and sampler ID – will be
re-initialized to factory settings. Select “NO” the leave the settings
unchanged.
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3710R/3710VR/3750 Refrigerated Sampler
Appendix D Calculating
Flow Increment Between Samples
CALCULATING FLOW INCREMENT
BETWEEN SAMPLES
1.75 MGD = 1,750,000 gal/day.
1,750,000 gal/day × 2 days = 3,500,000 gal
3,500,000 gal ÷ 100 samples = 35,000 gal/sample.
The sampler will accept flow proportional inputs of
a certain specific nature from an external flow
meter. These electronic flow input signals are
transmitted to the sampler at fixed increments of
total flow, for example, every 10,000 gallons. That
is, each time 10,000 gallons of liquid has flowed
past the flow meter, a signal is sent to the sampler,
which registers it as a single flow pulse. The sampler can be programmed to totalize any number of
flow pulses from 1 to 9999 before a sampling event
is initiated. For example, if the sampler were programmed to totalize 5 flow pulses and each flow
pulse represented 10,000 gallons of total flow, a
sample would be collected each time 50,000 gallons (5 flow pulses of 10,000 gallons each) had
passed the flow meter.
Thus, the desired flow increment between samples
is approximately 35,000 gallons.
Calculation of Number of Flow Pulses
Once the desired flow increment between samples
is known, the number of flow pulses to be programmed into the sampler may be calculated,
assuming that the volume of the flow pulses from
the flow meter is known. The number of flow
pulses is calculated by dividing the flow increment
between samples by the volume of each flow pulse.
Using the first example above, the flow increment
between samples was calculated as 52,000 gallons;
assume that each flow pulse represents 10,000 gallons of flow. The number of flow pulses to be programmed into the sampler is calculated:
Time Interval Known
52,000 gal ÷ 10,000 gal/flow pulse = 5.2 flow pulses.
If the desired average time interval between individual samples is known, the flow increment
between samples can be determined by calculating
how much flow (based on the average flow rate)
occurs during that time interval. For example,
assume that the average flow is 2.5 MGD and it is
desired to collect a sample every 30 minutes. The
flow increment between samples is calculated:
Rounding this to an even number results in 5 flow
pulses to be programmed into the sampler. This in
turn results in a flow increment between samples
of 50,000 gallons (5 flow pulses × 10,000 gallons/
flow pulse).
Total Number Of Samples
To calculate the total number of samples to be collected, three quantities must be known: the average
flow rate, the flow increment between samples (calculated above), and the total time over which the
composite sample is to be collected. The total number of samples to be collected is determined by first
calculating the total flow volume over the sampling
period, and then dividing this by the flow increment
between samples. For example, assume that the
average flow is 2.5 MGD, the flow increment
between samples is 50,000 gallons, and the composite sample is to be collected over a 24 hour period.
The total flow volume over a 24 hour period is:
2.5 MGD = 2,500,000 gal/day.
2,500,000 gal/day × 1 day/24 hrs × 1 hr/60 min = 1736 gal/
min.
1736 gal/min × 30 min/sample = 52,080 gal/sample.
Thus, the desired flow increment between samples
is approximately 52,000 gallons.
Number of Samples Known
Alternatively, if the total number of samples to be
collected over the total sampling period is known,
the flow increment between samples can be determined by calculating how much total flow will
occur during the sampling period, and dividing
this by the total number of samples to be collected.
For example, assume that the average flow is 1.75
MGD, that the composite sampling period is 2
days, and that it is desired to collect 100 individual
samples. The flow increment between samples is
calculated:
2.5 MGD = 2,500,000 gal/day.
2,500,000 gal/day × 1 day = 2,500,000 gal.
The total number of samples to be collected in this
24 hour period is then calculated:
2,500,000 gal ÷ 50,000 gal/samples = 50 samples.
Thus, based on an average flow of 2.5 MGD, 50
samples will be collected.
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3710R/3710VR/3750 Refrigerated Sampler
ple volume. This is to prevent overfilling of the
sample container. In the example, an individual
nominal sample volume of 125 ml might be a prudent choice. For critical applications, calibration of
the sample volume can be used. It is important to
select an individual sample volume which will not
result in an overfilled sample container under
worst-case conditions.
Calculation of Sample Volume
To calculate the volume of each individual sample,
the volume of the composite sample container
being used and the total number of samples to be
collected (calculated above) must be known. The
individual sample volume is calculated by simply
dividing the volume of the composite sample container being used by the total number of samples
to be collected. For example, assume that a 2.5 gallon (9,400 ml) plastic container is being used, and
that a total of 50 samples are to be collected in it.
The individual sample volume is then calculated:
The nominal volume of the composite sample may
be calculated by multiplying the programmed
nominal sample volume by the total number of
samples to be collected. In the example:
9400 ml ÷ 50 samples = 188 ml.
125 ml/sample × 50 samples = 6,250 ml.
Sample Volume Considerations
This calculated total volume may vary from the
actual total volume because of variations in the
actual volume of each individual sample. The total
time needed to collect the 50 individual samples
may vary from the desired 24 hour period because
of variations in the average flow rate from the 2.5
MGD figure used in these calculations.
Thus, a sample volume of 188 ml will result in the
desired composite sample. Because of the basic
uncertainty of the delivered sample volume
exactly matching the programmed nominal sample
volume and the 10 ml sample repeatability, it is
good practice to select a nominal sample volume
which is slightly smaller than the calculated sam-
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3710R/3710VR/3750 Refrigerated Sampler
Appendix E Glossary
Composite sampling - Composite sampling is a
process in which multiple sample volumes are
placed in a single container. A composite sample
represents an average of the characteristics of the
flow stream for the elapsed time of sampling.
Pre-sample purge - Pre-sample purge refers to
the suction line purge that precedes the delivery of
a sample volume. It is also called “pre-purge.”
Controller - The controller is a collection of electronic components which governs the actions of the
sampler. It includes the microprocessor, RAM
(Random Access Memory), ROM (Read Only Memory) and its imbedded software, the LCD (Liquid
Crystal Display), and the keypad.
Sample event - A sample event consists of the
complete sampling cycle resulting in the collection
of a sample volume. A sample event includes presample and post-sample purges, line rinses, liquid
detection retries, and delivery of the sample volume.
Cross contamination - Cross contamination
occurs when portions of previous samples are
mixed with the current sample. For example, cross
contamination will result when residual amounts
of sample remain in the suction line or pump tube
from a previous sample event.
Sample volume - The sample volume is the discrete, programmed amount of sample delivered to
the bottle.
Real time clock - A clock which can be set to the
actual time and date.
Sampling routine - A sampling routine, also
called a sampling program, is the process of taking
samples according to the program settings you
enter when programming and configuring the controller. The program settings define the sample
pacing, volume, and key times.
Event mark - An event mark is a signal sent by
the sampler to a flow meter or other device at each
sample event. Each time an event mark pulse is
received by the flow meter, a mark is placed on the
flow meter's recording chart. Marking the recording chart cross-references the charted flow with
the sample events.
Selection - A selection is represented by a blinking word or number in an input display. The blinking selection indicates the current choice or value.
Selections are accepted and stored by pressing the
ENTER/PROGRAM key.
Post-sample purge - Post-sample purge refers to
the suction line purge that follows the delivery of a
sample volume. It is also called “post-purge.”
Suction head - Suction head is the vertical distance from the surface of the flow stream to the
pump inlet.
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3710R/3710VR/3750 Refrigerated Sampler
108
3710R/3710VR/3750 Refrigerated Sampler
Appendix F Material Safety Data
Sheets
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3710R/3710VR/3750 Refrigerated Sampler
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3710R/3710VR/3750 Refrigerated Sampler
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3710R/3710VR/3750 Refrigerated Sampler
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3710R/3710VR/3750 Refrigerated Sampler
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3710R/3710VR/3750 Refrigerated Sampler
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124
Warranty
Isco One Year Limited Factory Service Warranty *
Isco warrants covered products against
failure due to faulty parts or workmanship for
a period of one year (365 days) from their
shipping date, or from the date of installation
by an authorized Isco Service Engineer, as
may be appropriate.
During the warranty period, repairs,
replacements, and labor shall be provided at
no charge. Isco’s liability is strictly limited to
repair and/or replacement, at Isco’s sole
discretion.
Failure of expendable items (e.g., charts,
ribbon, tubing, glassware, seals and filters),
or from normal wear, accident, misuse,
corrosion, or lack of proper maintenance, is
not covered. Isco assumes no liability for
any consequential damages.
Isco specifically disclaims any warranty of
merchantability or fitness for a particular
purpose.
This warranty applies only to products sold
under the Isco trademark and is made in lieu
of any other warranty, written or expressed.
No items may be returned for warranty
service without a return authorization number
issued from Isco.
This warranty does not apply to the following
products: Process Analyzers, SFX 3560 SFE
Extractor, 6100 VOC Sampler.
The warrantor is Isco, Inc. 4700 Superior,
Lincoln, NE 68504, U.S.A.
* This warranty applies to USA customers. Customers in other countries should contact their Isco dealer for warranty service.
In the event of instrument problems, always contact the Isco Service Department, as problems can often be
diagnosed and corrected without requiring an on-site visit. In the U.S.A., contact Isco Service at the numbers
listed below. International customers should contact their local Isco agent or Isco International Customer Service.
Return Authorization
A return authorization number must be issued prior to shipping. Following authorization, Isco
will pay for surface transportation (excluding packing/crating) both ways for 30 days from the
beginning of the warranty period. After 30 days, expense for warranty shipments will be the
responsibility of the customer.
Shipping Address:
Mailing address:
Phone:
Fax:
Email:
August 2002 P/N 60-1002-040
Isco, Inc. - Attention Repair Service
4700 Superior Street
Lincoln NE 68504 USA
Isco, Inc.
PO Box 82531
Lincoln NE 68501 USA
Repair service: (800)775-2965 (lab instruments)
(800)228-4373 (samplers & flow meters)
Sales & General Information (800)228-4373 (USA & Canada)
(402) 465-3001
service@isco.com
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