Fluke 1522 User's Guide

Hart Scientific

1522

Handheld Thermometer Readout

User’s Guide

Rev. 5B2202

Fluke Corporation, Hart Scientific Division

799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA

Phone: +1.801.763.1600 • Telefax: +1.801.763.1010

E-mail: [email protected]

www.hartscientific.com

Subject to change without notice. • Copyright © 2005 • Printed in USA

Rev. 5B2202

Table of Contents

1 Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1

Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.1

WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.2.2

CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.3

Authorized Service Centers. . . . . . . . . . . . . . . . . . . . . . 4

2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Specifications and Environmental Conditions . . . . . . . . . . 9

3.1

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2

Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . 10

3.3

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.2

Use Proper Care with the 1522 and Accessories . . . . . . . . . . 13

4.3

Learn About the Features and Components . . . . . . . . . . . . . 13

4.4

Connect the Probe . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.5

Connect the Power Source . . . . . . . . . . . . . . . . . . . . . 14

4.6

Switch the Power On . . . . . . . . . . . . . . . . . . . . . . . . 14

4.7

Measure Temperature . . . . . . . . . . . . . . . . . . . . . . . . 14

5 Parts and Controls . . . . . . . . . . . . . . . . . . . . . . . . 17

5.1

Front View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

5.2

Top and Side View . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.3

Back View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.4

Internal Features. . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.5

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6 General Operation . . . . . . . . . . . . . . . . . . . . . . . . 25

6.1

Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6.2

DC Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6.3

Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

6.4

Display and Backlight . . . . . . . . . . . . . . . . . . . . . . . . 27

i

ii

6.5

Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

6.6

INFO-CON Connector . . . . . . . . . . . . . . . . . . . . . . . 29

7 Display Functions. . . . . . . . . . . . . . . . . . . . . . . . . 31

7.1

Blank Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7.2

Min/Max Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.3

Demand Logging . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.3.1

7.3.2

Demand Log Label and Data Storage . . . . . . . . . . . . . . . . . . . . . 33

Dump Data? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.3.3

Clear Log?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.4

Auto Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.4.1

7.4.2

Clear Autolog? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Log Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

7.4.3

7.4.4

7.4.5

Autolog Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Autologged Data Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Dump Data? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.5

Delta(x) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.6

Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.7

Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.8

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.9

CAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.9.1

7.9.2

Mtr Due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Prb Due . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.9.11

7.9.12

7.9.13

7.9.14

7.9.15

7.9.16

7.9.17

7.9.18

7.9.19

7.9.20

7.9.3

7.9.4

7.9.5

7.9.6

7.9.7

7.9.8

7.9.9

7.9.10

Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Passcode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Probe Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Prb # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Prb Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

ITS-90 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

IEC751 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

CVD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

YSI-400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

THERM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Probe Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

PCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

PDue. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Digital Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

MCal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

MDue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

CAL1 and CAL2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

8 Communications Interface. . . . . . . . . . . . . . . . . . . . 47

8.1

RS-232 Connection . . . . . . . . . . . . . . . . . . . . . . . . . 47

8.2

Communication Command List . . . . . . . . . . . . . . . . . . . 48

8.2.1

8.2.2

Primary Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Calibration Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

9 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

9.1

Required Equipment. . . . . . . . . . . . . . . . . . . . . . . . . 53

9.2

Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . 53

10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

11 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . 57

11.1

An Error Message Is Displayed . . . . . . . . . . . . . . . . . . . 57

11.2

Downloading Autologged Data . . . . . . . . . . . . . . . . . . . 58

11.3

Placement of Infrared Dongle for IR Data Transfer. . . . . . . . . 59

11.4

CE Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

11.4.1

EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

11.4.1.1

Immunity Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

11.4.1.2

Emission Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

11.4.2

Low Voltage Directive (Safety) . . . . . . . . . . . . . . . . . . . . . . . . . 61

iii

iv

Figures and Tables

Table 1 International Electrical Symbols . . . . . . . . . . . . . . . . . . . . . 1

Figure 1 Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 2 Top and Side View . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 3 INFO-CON Connector . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 4 Infrared Dongle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 5 Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 6 12V DC Power Source Polarity . . . . . . . . . . . . . . . . . . . . . 27

Figure 7 Probe Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 8 Operating Modes Flowchart . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 9 RS-232 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 10 Infrared Dongle Position . . . . . . . . . . . . . . . . . . . . . . . . . 60

1

1.1

1 Before You Start

Symbols Used

Before You Start

Symbols Used

Table 1 lists the International Electrical Symbols. Some or all of these symbols

may be used on the instrument or in this manual.

Table 1

International Electrical Symbols

Symbol Description

AC (Alternating Current)

AC-DC

Battery

CE Complies with European Union Directives

DC

Double Insulated

Electric Shock

Fuse

PE Ground

Hot Surface (Burn Hazard)

Read the User’s Manual (Important Information)

Off

On

1

2

1522 Handheld Thermometer Readout

User’s Guide

Symbol Description

Canadian Standards Association

OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per IEC1010-1 refers to the level of Impulse Withstand Voltage protection provided. Equipment of

OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation. Examples include household, office, and laboratory appliances.

C-TIC Australian EMC Mark

The European Waste Electrical and Electronic Equipment (WEEE) Directive

(2002/96/EC) mark.

1.2

1.2.1

Safety Information

Use this instrument only as specified in this manual. Otherwise, the protection provided by the instrument may be impaired.

The following definitions apply to the terms “Warning” and “Caution”.

•

“WARNING” identifies conditions and actions that may pose hazards to the user.

•

“CAUTION” identifies conditions and actions that may damage the instrument being used.

WARNINGS

To avoid personal injury, follow these guidelines.

•

DO NOT

use this unit in environments other than those listed in the

User’s Guide.

•

Follow all safety guidelines listed in the User’s Guide.

•

Calibration equipment should only be used by trained personnel.

•

This instrument can measure extreme temperatures. Precautions must be taken to prevent personal injury or damage to objects. Probes may be extremely hot or cold. Cautiously handle probes to prevent personal injury.

Carefully place probes on a heat/cold resistant surface or rack until they reach room temperature.

•

The AC adapter can present safety concerns if misused or damaged. To avoid the risk of electric shock or fire, do not use the AC adapter outdoors or in a dusty, dirty, or wet environment. If the cord, case, or plug of the adapter is damaged in any way, discontinue its use immediately and have it replaced. Never disassemble the AC adapter. Use only the AC adapter provided with the instrument or equivalent adapter recommended by the manufacturer of this instrument.

1.2.2


Safety Information

•

The AC adapter has circuits with high voltage inside that could present danger of electrical shock or fire if exposed. If the AC adapter is damaged in any way or becomes hot, discontinue its use immediately, disconnect it from any AC supply, and have it replaced. Do not attempt to open, repair, or continue using a damaged or defective AC adapter.

•

The instrument batteries can present danger if not handled properly. To avoid the risk of exposure to dangerous substances or explosion, immediately remove the batteries and discontinue use if they leak or become damaged. Never allow the batteries to be shorted, heated, punctured, or dropped. If the instrument is physically damaged, immediately remove the batteries to insure that they do not become shorted. While removed from the instrument, store the batteries in a location so that they do not come into contact with metal or fluids that might short circuit the batteries and where they are safe from excessive temperatures. Used batteries must be disposed of properly. Check your local regulations for additional information. Never dispose of batteries in fire which may result in explosion with the possibility of personal injury or property damage.

•

DO NOT

use this instrument in combination with any probe (RTD or thermistor) to measure the temperature or resistance of any device that is electrically energized. Severe electric shock, personal injury, or death may occur.

CAUTIONS

To avoid possible damage to the instrument, follow these guidelines.

•

If the instrument is dropped, struck, or handled in a way that causes internal or external physical damage, immediately unplug the AC adapter, remove the batteries, discontinue use, and contact the factory for repair. Do not attempt to disassemble or repair the instrument, batteries, or AC adapter. Refer repairs or replacement components to the manufacturer.

•

The instrument and thermometer probes are sensitive and can be easily damaged. Always handle these devices with care.

DO NOT

allow them to be dropped, struck, stressed, or overheated.

•

DO NOT

leave the AC adapter plugged in for more than 24 consecutive hours or the battery life could be degraded.

•

Probes are fragile devices which can be damaged by mechanical shock, overheating, and absorption of moisture or fluids in the wires or hub.

Damage may not be visibly apparent but nevertheless can cause drift, instability, and loss of accuracy. Observe the following precautions:

•

DO NOT

allow probes to be dropped, struck, bent, or stressed.

•

DO NOT

overheat probes beyond their recommended temperature range.

•

DO NOT

allow any part of the probe other than the sheath to be immersed in fluid.

•

DO NOT

allow the probe hub or wires to be exposed to excessive temperatures.

3

4


User’s Guide

1.3

•

Keep the probe wires clean and away from fluids.

Authorized Service Centers

Please contact one of the following authorized Service Centers to coordinate service on your Hart product:

Fluke Corporation, Hart Scientific Division

799 E. Utah Valley Drive

American Fork, UT 84003-9775

USA

Phone: +1.801.763.1600

Telefax: +1.801.763.1010


Fluke Nederland B.V.

Customer Support Services

Science Park Eindhoven 5108

5692 EC Son

NETHERLANDS

Phone: +31-402-675300

Telefax: +31-402-675321


Fluke Int'l Corporation

Service Center - Instrimpex

Room 2301 Sciteck Tower

22 Jianguomenwai Dajie

Chao Yang District

Beijing 100004, PRC

CHINA

Phone: +86-10-6-512-3436

Telefax: +86-10-6-512-3437



Authorized Service Centers

Fluke South East Asia Pte Ltd.

Fluke ASEAN Regional Office

Service Center

60 Alexandra Terrace #03-16

The Comtech (Lobby D)

118502

SINGAPORE

Phone: +65 6799-5588

Telefax: +65 6799-5588


When contacting these Service Centers for support, please have the following information available:

•

Model Number

•

Serial Number

•

Voltage

•

Complete description of the problem

5

2

2 Introduction

Introduction

The Hart 1522 is a low-cost, high-accuracy digital thermometer readout designed to be used with PRTs and thermistors. The unique combination of features makes this instrument suitable for a wide variety of applications in industry. Features and capabilities of the 1522 include the following:

•

Accepts input from platinum resistance thermometers (PRTs) and thermistors

•

Works with Hart’s INFO-CON probe connector (which is partially based on U.S. Patent 5,857,777) to automatically recognize the type of sensor and its characteristics

•

Alerts the operator automatically when the probe calibration or meter calibration expires

•

Measures with an accuracy of ±0.025°C at 25°C with PRTs and ±0.005°C at 25°C with thermistors

•

Accepts three- or four-wire sensors to eliminate lead resistance errors

•

Measures with a fast one-second measurement cycle

•

Displays maximum, minimum, and delta temperatures

•

Uses a unique factory-assigned passcode to protect programmed settings

•

Displays measurements and settings on a high-contrast LCD display

•

Communicates with other equipment or a computer using an RS-232 serial interface

•

Can be powered from its AC adapter or rechargeable battery

•

Stores up to 10,000 readings with reading, units, date, time, and label in autologging mode at user selected intervals

•

Stores up to 100 readings with reading, units, date, time, and label in demand logging mode

•

Contains an infrared interface for fast downloading of logged data

•

Stores 25 labels (8 characters) for easy recognition of logged data

•

Stops logging once maximum readings are stored. Memory must be cleared to store additional data

•

Starts and stops logging both from the front panel and through the

RS-232 and infrared interfaces

•

Allows user to select a label for every reading stored in demand logging mode

7

3

3.1

3 Specifications and Environmental Conditions

Specifications

Specifications and Environmental

Conditions

Specifications

Resistance Range

Resistance Accuracy, PRT, one year †

Resistance Accuracy, thermistor, one year †

Temperature Range

Temperature Accuracy, PRT

Temperature Accuracy,

2.25 k

100 k

Probe

Ω

Ω

thermistor

Temperature Accuracy,

10 k

Ω

thermistor

Temperature Accuracy, thermistor

Resistance Resolution

Temperature Resolution

Probe Connector

Maximum Acceptable Probe

Lead Resistance

†

†

†

Probe Excitation Current

Measurement Period

†

0

Ω to 500 k

Ω

0

Ω to 25

Ω

: 0.002

Ω

25

Ω to 400

Ω

: 0.008% (80 ppm) of reading

0

Ω to 2 k

Ω

: 0.4

Ω

2 k

Ω to 200 k

Ω


200 k

Ω to 500 k

Ω


PRT: –200°C to 962°C (–328°F to 1764°F)

Thermistor: –50°C to 150°C (–58°F to 302°F)

–200°C to 100°C: ±0.025°C (±0.045°F)

100°C to 400°C: 0±.05°C (±0.09°F)

400°C to 800°C: ±0.1°C (±0.18°F)

800°C to 962°C: ±0.15°C (±0.27°F)

–50 to 25°C: ±0.005°C (±0.009°F)

25°C to 50°C: ±0.01°C (±0.018°F)

50°C to 75°C: ±0.03°C (±0.054°F)

75°C to 100°C: ±0.08°C (±0.144°F)

0 to 50°C: ±0.005°C (±0.009°F)

50°C to 75°C: ±0.01°C (±0.018°F)

75°C to 100°C: ±0.02°C (±0.036°F)

100°C to 125°C: ±0.05°C (±0.09°F)

125°C to 150°C: ±0.1°C (±0.18°F)

0 to 50°C: 0.006°C (0.011°F)

50°C to 150°C: 0.009°C (0.016°F)

0.001

Ω

0.001°C, F, K, R

IEC-751 or DIN-43760 PRT

Callendar-Van Dusen calibrated PRT; nominal 100

Ω

ITS-90 calibrated 25

Ω or 100

Ω

PRT

YSI-400 series or equivalent 2252

Ω thermistor

Steinhart-Hart thermistor polynomial; nominal R(25°C) 2k

Ω to

100k

Ω

Hart INFO-CON connector

10

Ω

PRT: 0.5 mA

Thermistor: 5

μ

A

1 second

9


User’s Guide

3.2

3.3

Digital Filter

Remote Communications

Display

Operating Temperature Range

Power

Safety

Exponential with adjustable time constant (1 to 60 seconds)

RS-232 serial, infrared

LCD, 6-digit x 7-segment with 16-character alphanumeric

0 to 40°C (32 to 104°F) absolute

15 to 35°C (59 to 95°F) full accuracy

12 VDC (AC adapter included)

Rechargeable NiMH batteries (included)

OVERVOLTAGE (Installation) CATEGORY II, Pollution Degree 2 per

IEC1010-1 refers to the level of Impulse Withstand Voltage protection provided. Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be supplied from the fixed installation.

Examples include household, office, and laboratory appliances.

Size

Weight

7.75"H x4.2"Wx1.5"D (20 cm H x 11 cm W x 4 cm D)

0.4 kg (1.0 lb.)

†

Accuracy specifications apply from 15 to 35°C. Accuracy specifications over the entire absolute operating range are 1.5 times the stated values. Temperature accuracy does not include probe uncertainty or probe characterization errors. The practical measurement range may be limited by the sensor.

Environmental Conditions

Although the instrument has been designed for optimum durability and trouble-free operation, it must be handled with care. The instrument should not be operated in an excessively dusty, dirty, or wet environment. Maintenance and cleaning recommendations can be found in the Maintenance section of this manual.

For full accuracy, operate the instrument in ambient temperatures between

15-35°C (59-95°F). Do not operate the instrument in an environment colder than 5°C (41°F) or warmer than 50°C (122°F).

The instrument operates safely under the following conditions:

•

Operating temperature range: absolute 5–50°C (41–122°F); full accuracy15-35°C (59-95°F)

•

Ambient relative humidity: 15-50%

•

Pressure: 75kPa-106kPa

•

Vibration should be minimized

•

Altitude less than 2,000 meters

•

Indoor use only

Warranty

Fluke Corporation, Hart Scientific Division (Hart) warrants this product to be free from defects in material and workmanship under normal use and service for a period as stated in our current product catalog from the date of shipment.

10

3 Specifications and Environmental Conditions

Warranty

This warranty extends only to the original purchaser and shall not apply to any product which, in Hart’s sole opinion, has been subject to misuse, alteration, abuse or abnormal conditions of operation or handling.

Software is warranted to operate in accordance with its programmed instructions on appropriate Hart products. It is not warranted to be error free.

Hart’s obligation under this warranty is limited to repair or replacement of a product which is returned to Hart within the warranty period and is determined, upon examination by Hart, to be defective. If Hart determines that the defect or malfunction has been caused by misuse, alteration, abuse or abnormal conditions or operation or handling, Hart will repair the product and bill the purchaser for the reasonable cost of repair.

To exercise this warranty, the purchaser must forward the product after calling

or writing an Authorized Service Center (see Section 1.3). The Service Center

assumes NO risk for in-transit damage.

THE FOREGOING WARRANTY IS PURCHASER’S SOLE AND EXCLU-

SIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EX-

PRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY

IMPLIED WARRANTY OR MERCHANTABILITY, OR FITNESS FOR ANY

PARTICULAR PURPOSE OR USE. HART SHALL NOT BE LIABLE FOR

ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAM-

AGES OR LOSS WHETHER IN CONTRACT, TORT, OR OTHERWISE.

11

4

4.1

4.2

4.3

4 Quick Start

Unpacking

Quick Start

This section briefly explains the basics of setting up and operating your thermometer readout.

Unpacking

Carefully unpack the 1522 and accessories and inspect them to make sure all components are present and in satisfactory condition. Verify that the following items are present:

•

1522 Thermometer Readout

•

AC Adapter (clamp-on ferrite installed)

•

Serial Cable

•

User's Guide

•

Report of Calibration

•

Calibration Label

•

Passcode Notice

•

INFO-CON Connector

•

Clamp-on ferrite with installation instructions for probe

•

Probe (optional—must be purchased separately)

If all items are not present, contact an Authorized Service Center (see Section

1.3).

Use Proper Care with the 1522 and Accessories

First and most important is to understand the safety issues related to the 1522 and its accessories. Be aware that potential hazards exist due to high temperatures, high voltages, and battery chemicals. Carefully read Section .

CAUTION

: The 1522 and any thermometer probes are sensitive instruments that can be easily damaged. Always handle these devices with care.

DO NOT allow them to be dropped, struck, stressed, or overheated.

Learn About the Features and Components

Familiarize yourself with the features and accessories of the 1522 by reading

Section 5.

13


User’s Guide

4.4

4.5

4.6

4.7

Connect the Probe

The PRT or thermistor probe connects to the top of the 1522 using Hart’s unique INFO-CON probe connector. The probe connector is inserted into the top of the instrument with the ridged to the back and fits snugly and locked into place when it is fully inserted.

The INFO-CON probe connector includes a memory device that

stores the unique characteristics of the probe,

allowing the 1522 to measure temperature accurately. If your probe was purchased from Hart for use with the 1522, it should already have the connector attached and properly programmed. You can use your own probe with the 1522, but you must attach it to an INFO-CON

connector. See Section 6.6 for more information on the INFO-CON connector

and instructions on properly attaching the probe to the connector.

Connect the Power Source

The 1522 draws power either from a DC power supply (the included AC adapter) connected to the DC input or from the internal rechargeable battery pack. To use the AC adapter, plug it into a wall outlet of the appropriate voltage

and insert the DC plug into the DC power input of the 1522 (see Figure 2.) The

battery pack must first be fully charged prior to using the AC adapter (see Sec-

tion 6.1).

Switch the Power On

Power is switched on and off with the power button located below and to the left of the display. To switch the power on, hold the power button down for at least three seconds and release. (To switch power off, momentarily press the power button again.) The instrument takes a few seconds to power up, initialize itself, and begin normal operation. During initialization the lower line of the display shows the manufacturer, model number, firmware version, and the state of battery charge or the message “External power” if the AC adapter is attached. If the thermometer readout or probe calibration have expired, the messages “Prb cal expired” or “Mtr cal expired” are displayed. The 1522 reads important information about the attached probe from the INFO-CON connector that is used to calculate temperature.

The 1522 then performs a memory check of critical parameters, such as the calibration parameters CAL1 and CAL2. During this check the lower line of the display reads “Checking Memory”. If a “Memory Error” or “Memory Recover” message is displayed, see Section 12.1, Troubleshooting, for additional information and instructions.

Measure Temperature

After initialization the upper line of the display begins to show temperature measurements sensed by the probe. Place the probe into the object where you

14

4 Quick Start

Measure Temperature want to measure the temperature. DO NOT force the probe or otherwise allow it to be bent, stressed, or overheated. It can be easily damaged if misused. For further suggestions on handling the probe and using the 1522 and probe to

measure temperature accurately, see Section 6.5. For information on the various

modes of operation of the 1522 see Section 7.

15

5

5.1

5 Parts and Controls

Front View

Parts and Controls

The functions of the various features of the 1522 are described below.

Front View

The front of the 1522 features the LCD display and control buttons.

Figure 1

Front View

17


User’s Guide

Display

-The display shows the current temperature (or resistance) measurement on the large numeric upper portion of the display. It can also show a variety of information on the smaller alphanumeric lower portion such as minimum, maximum, delta(x), and other instrument settings.

Power and Backlight button

-This button turns the instrument on or off. If the power is on, pressing the button for three seconds toggles the backlight on or

off (see Section 6.3).

Note:

using the backlight drains the battery more quickly.

ENT (enter) button

-This button is pressed to accept changes to a setting and, in some modes, to store the most recent measurement.

CLR (clear) button

-This button cancels changes to a setting and in the

MIN/MAX mode resets the minimum and maximum to the last measurement.

Up and Down button

s-These buttons are used to change values and settings.

MODE button

-This button advances through operating modes and program-

ming functions (see Section 7).

18


Top and Side View

5.2

Top and Side View

Top View

Probe Connector

Serial Port Infrared Window

Side View

DC Power Input

Stand

Figure 2

Top and Side View

The top and side of the 1522 feature the probe connector, DC power input, serial port, and infrared window.

Probe Connector

- At the top of the thermometer readout is the opening where the probe connector is inserted. The probe must be connected using an

INFO-CON probe connector to measure temperature (see Section 6.6).

DC Power Input

- The AC adapter plugs into the DC power input to recharge the battery and to power the instrument while the battery is being charged (see

Section 6.2).

Serial Port

- The RS-232 serial port provides a means of connecting the 1522

to a computer or a printer using the included serial cable (see Section 8). The

baud rate is fixed at 2400 baud, the linefeed is fixed to ON (all carriage returns are followed by a linefeed, ASCII decimal 10), and the duplex is fixed to Half disabling the echo.

Infrared Window

- The infrared window has no functionality.

19


User’s Guide

5.3

5.4

Back View

See Figure 5 on page 25.

Stand

- The stand at the back of the 1522 can be flipped down to prop up the instrument for better viewing.

Battery Compartment

- Behind the stand is the compartment that contains the battery pack. The battery pack can be accessed if necessary by opening the bat-

tery cover with a small Philips screwdriver (see Section 6.1).

Serial Number Label

- Also behind the stand is the serial number label that uniquely identifies the instrument.

Internal Features

The significant components inside the 1522 are described here.

Battery

- The 1522 has an internal rechargeable battery pack that can be recharged by the AC adapter without removing the battery. It can be used and recharged many times. If necessary, it can be easily removed and replaced (see

Section 6.1).

Micro-controller

- The 1522 uses a micro-controller to control all its functions. The micro-controller manages the measurement process, retrieves measurement data from the analog-to-digital converter (ADC), places measurements and other information on the display, senses button actions, reads battery status information from the power control circuit, and handles communications through the serial port.

Power Control Circuit

- The power control circuit manages the electrical power that drives all the circuits. It handles switching between the two sources of power (DC input and battery pack), regulates voltages, monitors the state of battery charge, and manages battery charging.

Analog-to-Digital Converter and Measurement Circuit -

The ADC takes an analog signal produced by the probe and converts it to a digital value that can be read by the micro-controller. The ADC used in the 1522 was selected for its excellent resolution, linearity, and stability. The measurement circuit built around the ADC was carefully designed for accuracy and stability to match the

ADC. The measurement circuit allows complete rejection of probe wire resistance effects that would otherwise seriously limit accuracy. Offsets from sources such as thermoelectric EMF are also completely rejected. This is done using a current reversal technique with the probe current alternating at a rate of one cycle per second. Self-heating is minimized by using low sensing currents.

For PRTs the current is only 0.5 mA. For thermistors the current is only 0.005

mA.

20

5.5


Accessories

Accessories

The 1522's accessories and their features are described here.

AC Adapter

- The AC adapter recharges the internal battery pack and may also be used to supply power to operate the 1522 while the battery is being charged

(see Section 6.2).

Serial Cable

- The serial cable is used to connect a computer or a printer to the

1522 through its serial port (see Section 8).

INFO-CON Connector

- Hart’s unique INFO-CON connector allows the probe to be easily attached and detached. It contains a memory device that

stores information about the probe and automatically transfers this data to the 1522 when the probe is attached

. This ensures that the settings used to measure and calculate temperature always match the probe being used (see

Section 6.6).

INFO

-CON

Figure 3

INFO-CON Connector

Ordering Information

Model

5626

Type

Pt-100 Ohm, 4-wire

5628

5614

Pt-25 Ohm, 4-wire

Probe

- The probe acts as the temperature sensor. Its resistance depends on its temperature. The 1522 precisely measures the resistance of the probe and uses the coefficients stored in the INFO-CON connector to calculate its temperature

(see Section 6.5). The following probe options are available.

Pt-100 Ohm, 4-wire

Range

–200 to 660°C

–200 to 660°C

–200 to 450°C

Size

1/4” x 12” or 15”

(6.35 x 305 or 381 mm)

Cal Uncertainty and

Repeatability

±0.015°C

1/4” x 12” or 15”

(6.35 x 305 or 381 mm)

±0.015°C

1/4” x 12” (6.35 x 305 mm) ±0.025°C

†

Typical Drift †

(1 year)

±0.03°C

±0.03°C

±0.01°C

21


User’s Guide

Ordering Information

Model

5613

5612

5627–6

5627–9

5627–12

5610-6

5610-9

5611

5611T

5640

5622-05

5622-10

5622-16

5622-32

5618-6

5618-9

5618-12

Type

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

10K-ohm Thermistor

10K-ohm Thermistor

10K-ohm Thermistor

10K-ohm Thermistor

4K-ohm Thermistor

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Pt-100 Ohm, 4-wire

Range

–200 to 300°C

–200 to 450°C

–200 to 300°C

–200 to 450°C

–200 to 450°C

0 to 110°C

0 to 110°C

0 to 110°C

0 to 110°C

0 to 60°C

–200 to 350°C

–200 to 350°C

–200 to 350°C

–200 to 350°C

–200 to 500°C

–200 to 500°C

–200 to 500°C

Size

Cal Uncertainty and

Repeatability

3/16” x 6” (4.76 x 152 mm) ±0.025°C

3/16” x 9” (4.76 x 229 mm)

3/16” x 6” (4.76 x 152 mm)

3/16” x 9” (4.76 x 229 mm)

1/4” x 12” (6.35 x 305 mm)

1/8” x 6” (3.2 x 152 mm)

1/8” x 9” (3.2 x 229 mm)

0.07” x 0.55” (1.8 x 14 mm)

0.11” x 1.1” (2.8 x 28 mm)

1/4” x 9” (6.35 x 229 mm)

0.5 x 100 mm

1.0 x 100 mm

1.6 x 100 mm

3.2 x 100 mm

1/8" x 9" (3.2 x 152 mm)

1/8" x 9" (3.2 x 229 mm)

1/8" x 9" (3.2 x 305 mm)

±0.025°C

±0.035°C

±0.035°C

±0.035°C

±0.02°C

±0.02°C

±0.02°C

±0.02°C

±0.0015°C

±0.035°C

±0.035°C

±0.035°C

±0.035°C

±0.035°C

±0.035°C

±0.035°C

†

Typical Drift †

(1 year)

±0.01°C

±0.01°C

±0.13°C

±0.13°C

±0.13°C

±0.01°C

±0.01°C

±0.01°C

±0.01°C

±0.005°C

±0.15°C

±0.15°C

±0.15°C

±0.15°C

±0.01°C

±0.01°C

±0.01°C

†

Probe performance specifications may vary based on use, handling, and calibration. Call an Authorized Service Center (see Section 1.3)

for more complete specifications.

IR Dongle

- The Model 2374 IR dongle (Figure 4) and the Model 9934

Log

Ware

or 9935 Log

Ware

II software allow logged data to be downloaded to a

22


Accessories computer and written to a file quickly. These items must be purchased separately.

Figure 4

Infrared Dongle

Log

Ware

Software

- The Log

Ware

software are data acquisition software packages that can be used with your thermometer to collect and graph data. The software also allows the user to download data logged from the instrument's memory to a computer and access to some of the instrument's features.

INFO-CON Download Adapter

- The Model 2372 INFO-CON download adapter and Model 9972 INFO-CON Download Adapter software can be used to program an INFO-CON connector with new probe calibration coefficients without using the thermometer readout. The Model 2372 INFO-CON Download Adapter has a 9-pin serial cable that connects to a serial (COM) port on a

PC. The INFO-CON Download Adapter software can then be used to read, edit, and write changes to the INFO-CON connector.

Carrying Cases

- There are two types of cases available for your 1522 thermometer readout. The Model 9318 case is a hard case for carrying the thermometer readout and a 12" probe. The Model 9321 case is a soft case with a belt clip and a probe slot.

23

6

6.1

6 General Operation

Battery

General Operation

This section explains the details of the operation of the 1522 with its components and accessories.

Battery

The 1522 has a built-in nickel-metal-hydride battery pack that can power the instrument for about 18 hours before needing to be recharged. The battery discharges much more quickly if the display backlight is used. The battery charge remaining or the message “External Power” is shown on the display when the instrument is switched on. The battery percentages are approximate and should be used as general guidelines when determining the length of charge remaining.

The battery is recharged

in situ

(while in place) using the AC adapter. Plug the

AC adapter into an AC socket of the appropriate voltage as noted on the AC adapter (normally 115V, optionally 230V). Connect the DC plug of the adapter into the DC input of the 1522 located on the right side. The battery charges as necessary whether or not the instrument is switched on. The power control circuit inside the instrument manages battery charging and stops charging the bat-

Figure 5

Battery Installation

25


User’s Guide

6.2

tery automatically when it’s fully charged. It normally takes about four hours to fully charge the battery. The instrument can be operated while the battery is being charged.

CAUTION: DO NOT

leave the AC adapter plugged in for more than 24 consecutive hours or, the battery life could be degraded.

The battery pack can be used for a minimum of 500 charge-discharge cycles before needing to be replaced. Replacement battery packs are available from the manufacturer. The battery pack can be easily removed and replaced in the field by following this procedure:

1.

Power the 1522 off and unplug the AC adapter.

2.

With the 1522 facing down, lift the stand to expose the battery cover (see

Figure 5). Remove the battery cover screw with a small Philip’s screw-

driver. Remove the battery cover to access the battery pack.

3.

Remove the battery pack by gently disconnecting the battery plug from the connector.

Note the orientation of the battery plug on the connector.

4.

Attach the polarized plug of the new battery pack onto the connector in

the same direction as before (see Figure 5 on page 25). Place the battery

pack in the battery compartment.

5.

Replace the battery cover and screw.

6.

Plug in the AC adapter and charge the new battery for a minimum of four hours for its initial charge.

WARNING:

Used batteries must be disposed of properly. Check your local regulations for additional information. Never dispose of batteries in fire as this may result in explosion with the possibility of personal injury or property damage.

DC Power Source

The DC power source provides power to charge the battery. It can also be used to power the 1522 while the battery is being charged. The AC adapter provided with the 1522 is intended to be used for these purposes. Use only the AC

26


Power Button adapter supplied by Hart Scientific. The DC power source plugs into the DC power input on the right side of the 1522.

–

+

Figure 6

12V DC Power Source Polarity

6.3

6.4

WARNING:

The AC adapter contains high voltage circuits that could present danger of electric shock or fire if exposed. If the AC adapter is damaged in any way or becomes hot, discontinue its use immediately, disconnect it from any AC supply, and have it replaced. Do not attempt to open, repair, or continue using a damaged or defective AC adapter.

Power Button

The power button controls power to the instrument and operates the backlight.

The following table summarizes the power button functions.

Function

Power on

Power off

Backlight on

Backlight off

Action

Press and the power button for at least three seconds

Press the power button momentarily (1/2 second or less) while the power is on

Press and hold the power button for three seconds or more while the power is on and the backlight is off

Press and hold the power button for three seconds or more while the backlight is on

Display and Backlight

The display shows measurement data and other relevant information depending on the selected mode.

The upper part of the display continually shows the most recent measurement with large digit format. A new measurement is produced and displayed every

27


User’s Guide

6.5

second. The display unit associated with the measurement is shown in smaller type to the right of the measurement. The possible display units are degrees

Celsius (C), resistance in ohms (

Ω

), degrees Fahrenheit (F), Kelvin (K), and degrees Rankine (R). The display units can be easily changed accessing the

Units mode (see Section 7.6).

The lower part of the display has various functions depending on the selected mode. It has smaller alphanumeric characters. It can be used to display minimum and maximum measurements, delta(x) measurements, or measurements stored in memory. It is also used to view and set various operating parameters.

The mode is easily changed using the

MODE

button. (See details on the vari-

ous modes beginning with Section 7.)

The display has a backlight that can be switched on for better viewing in dim light. The backlight is switched on and off by pressing and holding the power

button for three seconds (see Section 6.3 above).

Note:

The battery discharges more quickly when the backlight is used.

Probe

The probe is used to sense temperature and attaches to the 1522 using a Hart

INFO-CON probe connector that plugs into the top of the instrument.

The probe connector must be properly programmed with the correct charac-

teristics of the probe for measurements to be accurate (see Section 6.6).

The 1522 can be used with various types of PRT and thermistor probes:

•

ITS-90 calibrated 25

Ω or 100

Ω

PRT

•

IEC-751 or DIN-43760 PRT (RTD)

•

Callendar-Van Dusen calibrated 100

Ω

PRT

•

YSI-400 series or equivalent 2252

Ω thermistor

•

Steinhart-Hart thermistor polynomial; nominal R(25°C) 2k

Ω to 100k

Ω

See Section 7.9.8 for details on the various probe types and their programming.

The 1522 cannot be used with thermocouples.

The 1522 can be used with probes having two, three, or four wires. Three-wire probes allow partial compensation for wire resistance. The 1522 measures three-wire probes using the following sequence. It measures the sensor resistance, including the lead resistance in C2. The 1522 then directly measures the resistance in the C1 lead of the sensor and subtracts the measured C1 lead resistance from the measured sensor resistance (including the C2 lead resistance) to obtain the sensor resistance used to calculate temperature.

Note:

This sequence assumes that the lead resistance of C1 and C2 are equal. If C1 and C2 each have a different resistance value, there will be an error in the calculated sensor resistance equal to this difference. Four-wire probes allow complete rejection of wire resistance and should be used when the best accuracy is desired. The 1522 wire setting must be set to match the actual number of wires of the probe (see

Section 7.9.14).

28

6.6


INFO-CON Connector

Temperature is generally sensed at the tip of the probe. To get an accurate temperature measurement the probe sheath should be well immersed, with adequate depth and fit, into the medium to be measured.

CAUTION

: Probes are fragile devices that can be easily damaged by mechanical shock, overheating, and absorption of moisture or fluids in the wires or hub. Damage may not be visibly apparent but nevertheless can cause drift, instability, and loss of accuracy. Observe the following precautions:

Do not allow probes to be dropped, struck, bent, or stressed.

Do not overheat probes beyond their recommended temperature range.

Do not allow any part of the probe other than the sheath to be immersed in fluid.

Do not allow the probe hub or wires to be exposed to excessive temperatures.

Keep the probe wires clean and away from fluids.

INFO-CON Connector

The probe connects to the top of the 1522 using a Hart INFO-CON connector

(see Figure 3 on page 21). The probe connector fits snugly and locks into place

when it is fully inserted. The connector includes a memory device that stores the unique characteristics of the probe, allowing the instrument to measure temperature accurately. Generally, the probe is purchased with the connector attached and programmed by the factory. Connectors can be purchased separately and installed onto probes by the user. The INFO-CON can be programmed directly from the 1522 or from a PC with the optional Model 2372 accessory and

9972 software.

If it is necessary to install the INFO-CON onto a probe in the field, follow the diagram below for connecting the wires of the probe to the connector terminals.

CAUTION:

Before opening the INFO-CON case, be sure to be grounded with an ESD strap to avoid damaging the memory chip.

For four-wire probes, one pair of wires attaches to terminals C1 and P1 and the other pair attaches to terminals C2 and P2. (C1 and C2 source current and P1 and P2 sense the potential.) If a shield wire is present, it should be connected to

the GND terminal (see Figure 7).

A two-wire or three-wire probe can also be used with the instrument. The two-wire probe is connected by one wire to the C1 and P1 shorted terminals and the other wire to the C2 and P2 shorted terminals. Recognize that accuracy may be significantly degraded using a two-wire connection because of wire resistance. A three-wire probe is connected by attaching the common wires to the

29


User’s Guide

C1 and P1 terminals and the other single wire to the C2 and P2 terminals

(which are shorted together).

J1

GND

C1

P1

C2

P2

Hart Scientific

J2 J1

GND

C1

P1

P2

C2

Hart Scientific

J2

Four-wire Connection Three-wire Connection

Figure 7

Probe Wiring Diagrams

Short

J1

GND

C1

P1 P2

C2

Hart Scientific

J2

Two-wire Connection

Short

30

7

7 Display Functions

Display Functions

The insturment operates in any of several modes which determine what information is visible in the lower alphanumeric portion of the display. The

MODE

button sequences through the menu functions. This button can be pressed repeatedly until a desired mode is set. The various modes are listed below in the

order they appear. Also refer to Figure 8.

Blank -

No data shown

Min/Max -

Display minimum and maximum measurements (

CLR

to reset)

Demand Logging -

Store readings (up to 100) on demand in the memory registers

Auto Logging -

Store readings (up to 10,000) automatically in memory at user selected intervals

Delta(x) -

Display delta from reference measurement (

ENT

to set reference)

Units: C/

Ω

/F/K/R -

Set the units of measurement

Rate: 00000 -

Set the period for serial transmission

Resol: XXX.XXX -

Set the display resolution

CAL MODE

- Set probe and instrument calibration parameters (

MODE

button must be held for three seconds)

Note:

Units, Rate, and Resol are temporary modes. The instrument returns to

Blank mode if left in any of these modes when the power is cycled.

31


User’s Guide

Each of these operating modes is described in the sections that follow.

7.1

Blank Mode

MODE button

Min/Max Mode

MODE button

Demand Logging

MODE button

Auto Logging

MODE button

Delta(x) Mode

MODE button

Set Units

MODE button

Set Rate

MODE button

Set Resolution

MODE button any mode

MODE button (3 seconds)

Cal Mode

Figure 8

Operating Modes Flowchart

Blank Mode

This mode is identified by “Blank” that temporarily appears on the display.

32

7.2

7.3

7.3.1


Min/Max Mode

In this mode nothing appears on the alphanumeric portion of the display. Use this mode if you are only interested in the latest measurements and want to simplify the appearance of the display.

The message “Prb cal expired”, “Mtr cal expired”, “Recharge Needed”, or

“Probe is locked” may be displayed.

Min/Max Mode

This mode is identified by “Min/Max” that temporarily appears on the display.

In this mode the maximum and minimum measurements taken since the last time the function was cleared appears on the display. The minimum appears on the left and the maximum appears on the right. The resolution of the displayed values match the current setting of the thermometer as set in the Resolution

mode (see Section 7.8). Pressing the

CLR

button at anytime while in this mode clears the minimum and maximum values setting them to the last measurement.

Both the minimum and maximum are reset to 0°C (32°F) when the instrument is powered up.

Refer to Section 7.6 concerning how changing units affects Min/Max.



Demand Logging

This mode is identified by "Demand Logging" which temporarily appears on the screen.

In this mode up to 100 temperature readings with units, date, time, and label can be stored as required. This mode also allows all on-demand data points to be viewed. The logged values can be downloaded to a PC using the serial port.

Demand Log Label and Data Storage

This function allows data to be logged on-demand and also allows data to be viewed. The message "Press ENT to log" appears on the screen. Press the

ENT

button to store a label with the logged value and to log the current reading into the on-demand memory. Press the

Up

or

Down

button to scroll through the previously stored values. Press the

CLR

button to cancel storing the reading and to advance to the next function.

Continue pressing the

ENT

button to log additional readings. The labels should be pre-loaded into the instrument before performing on-demand logging. If no label is chosen the default label is applied which is the number (between 1 and

100) of the reading. After choosing a label, the label and the reading are displayed on the second line of the display. The on-demand readings can then be scrolled through using the

Up

and

Down

buttons.

33


User’s Guide

7.3.2

7.3.3

7.4

The labels can be pre-loaded using the Windows® HyperTerminal or other serial communications program and the command LBnn[=nnnnnnnn] as de-

scribed in Section 8.2.1. The labels can also be pre-loaded using the serial port

or the 2374 IR dongle with the 9934 Log

Ware

or 9935 Log

Ware

II software

available by calling an Authorized Service Center (see Section 1.3 on page 4).

Dump Data?

Press the

CLR

button anytime while in Demand Log Mode to enter this function. This function allows the user to download the stored values using the serial port or print the data to a serial printer. To download using the serial port, the 1522 must be connected to a computer using the serial cable sent with the instrument at the time of purchase. Windows

®

HyperTerminal or other serial communications program must be running. Set HyperTerminal or other serial communications program to use the correct COM port and to operate at 2400 baud, 8 data bits, 1 stop bit, no parity, and no flow control. Once the communications program is running and configured correctly, press the

CLR

button on the 1522 until the second line of the display reads, “Dump Data? No”. Select

“Yes” using the

Up

or the

Down

buttons and then press the

ENT

button. The demand logged data begins displaying in the terminal window and the second line displays “Downloading data”.

The instrument advances to the next function when all values have been downloaded. Pressing the

CLR

button before or during downloading causes the download to stop and advances to the next function. To exit the Demand Log

Mode, press the

MODE

button.

The demand logged data can also be downloaded using the 2374 IR dongle with the 9934 Log

Ware

or 9935 Log

Ware

II software. The user must purchase the IR dongle and the software from Hart Scientific. Using this software, the demand data can be downloaded into a file in ASCII format.

The Log

Ware

software also provides a utility to view and change logging labels.

Clear Log?

This function clears the on-demand memory. After 100 readings have been stored in the on-demand memory the 1522 does not allow any more readings to be logged until the on-demand memory is cleared. Press the

Up

and

Down

until "Yes" appears and then press the

ENT

button to clear the on-demand memory. Pressing the

CLR

button at anytime advances to the next function without clearing the memory.

Auto Logging

This mode allows data logging to occur automatically at user selected intervals.

Up to 10,000 temperature readings can be stored into memory with units, time, date, and label. Multiple log sessions are appended to the memory until the memory is full. The log sessions are grouped by the pre-loaded labels.

34

7.4.1

7.4.2

7.4.3

7.4.4


Auto Logging

Clear Autolog?

This function clears the memory of all autologged data. Once the 1522 has logged 10,000 readings, further automatic logging is prevented until the memory has been cleared. Pressing the

CLR

button cancels the “Clr Autolog?” function and advances to the next function. Pressing the

ENT

button also advances to the next function.

Log Rate

This function configures the rate at which data is stored into the memory of the

1522. The following rates are available: 1, 5, 10, 15, 30, or 60 seconds, 2, 5, 10,

15, 30 or 60 minutes. Scroll through the rates using the

Up

or

Down

buttons until the desired rate is shown and then press the

ENT

button to select the rate.

The 1522 advances to the next function. Pressing the

CLR

button at any time also advances to the next function.

Autolog Label

A label is stored with each logged reading. Up to 25 labels should be pre-loaded into the unit through the serial port or the infrared dongle prior to autologging. These labels can then be used to differentiate separate autologging sessions. The same label is applied to every data point once autologging is initiated. To change this label, autologging must be stopped and a new label selected. When selecting labels, press the

ENT

button to store the displayed label or press the

CLR

button to revert to the previously selected label.

The labels can be pre-loaded using Windows® HyperTerminal or other serial communications program and the command LBnn=[nnnnnnnn] as described in

Section 8.2.1. The labels can also be pre-loaded using the serial port or the

2374 IR dongle with the 9934 Log

Ware

or 9935 Log

Ware

II software available

by calling an Authorized Service Center (see Section 1.3 on page 4).

Autologged Data Storage

This function stores values to the memory of the unit for future download. Each reading is stored with units, date, time and label. Up to 10,000 readings can be stored in memory.

The message "ENT to start log" appears on the 1522 display. Press the

ENT

button to begin autologging. Press the

CLR

button to cancel and advance to the next function.

After pressing the

ENT

button the 1522 begins to log data automatically at the

rate specified in the Log Rate (see Section 7.4.2) and with the label chosen in

Autolog Label (see Section 7.4.3). The 1522 display alternates between the

message "ENT to stop log" and "Logging NN% Full" where NN is a number between 0 and 100 and shows the percentage of memory that contains autologged data. When data is being logged, all buttons are disabled except for the

ENT

button.

35


User’s Guide

7.4.5

7.5

7.6

Press the

ENT

button to stop autologging and to advance to the next function.

Dump Data?

This function allows the user to download the autologged data using the serial port or print the downloaded dats to a serial printer. To download using the se-

rial port, see Section 8 of this guide before selecting “Yes” when prompted by

Dump Data.

The autologged data can also be downloaded using the 2374 IR dongle with the

9934 Log

Ware

or 9935 Log

Ware

II software. The user must purchase the IR dongle and the software from your Hart Scientific supplier. Using this software, the autologged data can be downloaded in binary or ASCII format into a single

ASCII text file or multiple ASCII text files based on the labels. The approximate download times are as specified in the following table:

Download Mode

IR Binary

IR ASCII

Serial

† Times apply for 10,000 readings

Download Time

90 seconds †

22 minutes †

22 minutes †

The Log

Ware

software also provides a utility to view and change logging labels.

Delta(x) Mode

This mode is identified by “Delta(x)” that temporarily appears on the display.

In this mode the delta between the measurement and a previously stored reference value appears on the right side of the display. The reference value appears on the left. The resolution of the reference value may be changed using the

Resolution mode (see Section 7.8) if necessary. The

ENT

button stores the present measurement as the reference value.

Refer to Section 7.6 concerning how changing units affects Delta(x).



Units

This mode is identified by “Units: C/

Ω

/F/K/R” that appears on the display.

This mode allows you to select the unit of measurement: C for degrees Celsius,

Ω for resistance in ohms, F for degrees Fahrenheit, K for Kelvin, and R for

Rankine. The

Up

and

Down

buttons are used to select one of the displayed units. The underline cursor indicates which of the units is selected. The

ENT

36

7.7

7.8

7.9


Rate button stores the selection. If the

MODE

button or

CLR

button is pressed without pressing

ENT

the unit remains unchanged. Once the unit is selected, subsequent measurements will appear in that unit. After the Min/Max and Delta(x) modes are initiated, their values are automatically converted when changing units between °C, K, °F, or R. Changing units from

Ω to any temperature unit or visa versa, reinitializes the Min/Max and Delta(x) modes.

Any previously

Min/Max and Delta(x) values are lost.

Note:

When measuring in units of ohms, make sure that the appropriate probe type has been selected in the Cal Mode menu. For example, to measure a resistor between 0 and 400 ohms, set the units to ohms and select the appropriate probe type such as "CVD". To measure a resistor between 400 and 500K ohms, set the units to ohms and select the appropriate probe type such as "THERM".

Rate

This mode is identified by “Rate: 00000" that appears on the display.

This mode allows you to set the samples that are transmitted from the serial port. The sample for a 2-wire and a 4-wire probe is approximately one second and for a 3-wire probe is approximately two seconds. For example, if the rate is set to 2, every other sample is sent to the serial interface. A value of 0 disables transmission. The

Up

and

Down

buttons are used to increase or decrease the value for the underlined digit. The

ENT

button moves to the next digit. If the

ENT

button is pushed when the

last digit is underlined,

the setting is stored. If the

MODE

button or

CLR

button is pressed, the value remains unchanged.

Once the value is set measurements will be transmitted from the serial port at the given interval.

Resolution

This mode is identified by “Resol: XXX.XXX” that appears on the display.

This mode allows you to set the resolution of measurements to one, two, or three digits after the decimal point. The

Up

and

Down

buttons are used to increase or decrease the resolution setting. The

ENT

button stores the setting. If the

MODE

button or

CLR

button is pressed, the setting remains unchanged.

Once the resolution is set, measurements are displayed and transmitted from the serial port at the given resolution, if possible. The resolution may be reduced if necessary for large values of temperature or resistance.

CAL MODE

The calibration menu contains functions for setting probe and instrument calibration parameters. Press and hold the

MODE

button for three seconds to enter the calibration menu. "CAL MODE" appears on the display. Press the

ENT

button to advance.

37


User’s Guide

When editing any parameter, be sure to press the

ENT

button through the entire line of alphanumeric characters to ensure that the edits are stored. Pressing any button other than the

ENT

button advances to the next function without storing the new value.

If a probe parameter is edited, the new parameter value is uploaded into the

INFO-CON probe connector when the CAL Mode is exited by pressing the

MODE

button or after scrolling through the menu and leaving the PDue parameter (see Section 7.9.16). The message "Uploading params" is displayed.

After the parameters have been uploaded into the INFO-CON probe connector, the meter advances to the next menu item. Always check to ensure that the parameters have been written to the INFO-CON connector by disconnecting the probe or by turning the instrument off and on and then rechecking the parameters.

The calibration menu is entered by pressing and holding the MODE button for three seconds. “CAL MODE” appears on the display. Press the ENT button to advance. Press the MODE button while in the calibration menu to exit and to advance to the display mode that follows the display mode that was active before the CAL Mode was entered.

The functions contained in the CAL Mode are listed below in the order they appear. In any of the functions, the

ENT

button stores the displayed value or selection and advances to the next function. The

CLR

button can be used to cancel changes to a value or selection and to skip to the next function.

Use the

ENT

button to move from Mtr Due to Prb Due and then to Time. Use the

CLR

button to quickly advance through the remaining functions. Many of the functions are in the passcode protected part of the CAL Mode. You must enter the correct passcode to access those functions (see Section 7.9.4).

Mtr Due

- View the date the instrument is due for calibration

Prb Due

- View the date the probe is due for calibration

Time

- View and set the real-time clock time-of-day

Passcode

- Enter the passcode to advance to the protected functions

Date

- View and set the real-time clock date

Probe Lock

- Lock or unlock operation of the unit with the current probe only

Prb #

- Set the probe serial number

Prb Type

- Select the probe type and temperature calculation

R(.01)

[ITS-90 only] - Sets the R(273.16K) probe coefficient

a

[ITS-90 only] - Set the a5, a6, a7, a8, a9, a10, or a11 probe coefficient

b

[ITS-90 only] - Set the b5, b6, b7, b8, or b9 probe coefficient

c

[ITS-90 only] - Set the c6, or c7 probe coefficient

d

[ITS-90 only] - Set the d probe coefficient

a4

[ITS-90 only] - Set the a4 or a5 probe coefficient

38

7.9.1

7.9.2

7.9.3

7.9.4


CAL MODE

b4

[ITS-90 only] - Set the b4 or b5 probe coefficient

R(0)

[CVD only] - Set the R0 probe coefficient

Alpha

[CVD only] - Set the alpha probe coefficient

Delta

[CVD only] - Set the delta probe coefficient

Beta

[CVD only] - Set the beta probe coefficient

b0

[Therm only] - Set the b0 probe coefficient

b1


b2


b3


Probe Wires

- Set the number of wires of the probe

PCal

- Set the probe calibration date

PDue

- Set the probe calibration due date

Filter

- Set the digital filter time constant

MCal

- Set the instrument calibration date

MDue

- Set the instrument recalibration due date

CAL1

- Set the instrument's PRT range calibration parameter

CAL2

- Set the instrument's thermistor range calibration parameter

The calibration functions are described in detail in the following subsections.

Mtr Due

This function displays the date the instrument is due for calibration. The date cannot be changed with this function. To edit the meter due date, refer to Sec-

tion 7.9.19.

Prb Due

This function displays the date the probe is due for calibration. The date is stored in the INFO-CON probe connector. The date cannot be changed with

this function. To edit the probe due date, refer to Section 7.9.16.

Time

This function displays and sets the time of day. The time is always set, displayed, or printed in 24-hour format. To set each time segment, use the

Up

and

Down

buttons. Use the

ENT

button to move between time segments and to save the changed values. The

CLR

button moves to the next function.

Passcode

All functions below this function are protected by a passcode so that only authorized users can access them. The passcode must be entered correctly to continue. If the passcode is entered incorrectly or the

MODE

or

CLR

buttons are

39


User’s Guide

7.9.5

7.9.6

7.9.7

pressed, the message “Invalid Passcode” is displayed and the instrument is returned to the display mode that follows the function that was active when the

CAL Mode was entered.

Each individual instrument has its own unique passcode. The passcode number is given on a notice provided with this instrument. The equipment manager is responsible for keeping the passcode number stored in a proper location and ensuring that it is not lost or forgotten. If necessary, the passcode can be restored by contacting the manufacturer. To enter the passcode, use the

Up

and

Down

buttons to set each digit of the passcode and the

ENT

button to move to the next digit on the right. Press

ENT

twice when all digits are entered to move to the next function. If the passcode is entered correctly, the next function in the

CAL Mode appears.

Date

This function displays the present date and allows it to be changed. This function is placed in the pass-code protected part of the CAL Mode since the calibration due warning messages depend on the present date as well as the stored due dates. Use the

Up

and

Down

buttons to set each date segment and the

ENT

button to move between the date segments. Press

ENT

when all digits are entered to save the changed values. The

CLR

button moves to the next function without saving the changed values.

Probe Lock

This function locks or unlocks operation of the unit with the presently connected probe only. To set probe lock, use the

Up

and

Down

buttons to select

ON or OFF and press the

ENT

button to store the selected setting and continue.

If probe lock is set to ON, the serial number of the currently attached probe is stored. The instrument can only be used to display temperature with the probe that was attached when the probe lock was set ON. If probe lock is ON and a different probe is attached, the instrument returns to Blank Mode and displays the message "Probe is locked". Measuring is disabled. Probe lock ON also disables access to the probe parameters that follow in the menu.

If probe lock is OFF, the instrument can be used with any probe. To lock the instrument with a new probe, set probe lock OFF, attach a new probe, and then set probe lock ON again.

Prb #

This function displays the serial number of the probe and allows it to be set.

The probe serial number is stored in the INFO-CON probe connector.

Use the

Up

and

Down

buttons to set each digit and the

ENT

button to move to the next digit on the right. Press

ENT

when all digits are entered.

40

7.9.8

7.9.9


CAL MODE

Prb Type

This function specifies the type of probe and its characterization. It allows the instrument to use the appropriate algorithm to calculate temperature from the measured resistance of the probe. The functions that follow the probe conversion function for setting probe characterization coefficients depend on the selected probe type. The table below lists the probe types and the corresponding coefficients.

Probe Type

ITS-90

IEC751

CVD

YSI-400

THERM

Description

PRTs calibrated to ITS-90

PRTs (RTDs) conforming to IEC-751

PRTs characterized by the

Callendar-Van Dusen equation

Coefficients

R(.01), a, b, c, d, a4, and b4 none

R0, Alpha, Delta, and Beta

Thermistors matching the YSI-400 series none

Thermistors characterized by the thermistor polynomial b0, b1, b2, and b3

Each of the conversion options is explained in the following sections along with their associated coefficients, when applicable. The probe type and associated coefficients are stored in the INFO-CON probe connector. Use the

Up

and

Down

buttons to select the probe type and the

ENT

button to store and continue.

Each of the coefficients that follow the probe type are set in the usual way. Use the

Up

and

Down

buttons to set each digit and the

ENT

button to move to the next digit to the right. Press

ENT

when all digits are entered.

ITS-90

The ITS-90 type is for PRTs calibrated and characterized using the

International Temperature Scale of 1990

equations. Probes that use this linearization curve generally have excellent accuracy (0.005 to 0.025°C), a wide operating range (–180°C to 420°C or higher). The coefficients that appear when ITS-90 is selected are “R(.01)”, “a”, “b”, “c”, “d”, “a4", and ”b4".These should be set to the coefficient values that appear on the PRT calibration certificate according to the following table.

All coefficients, except R(.01), have values greater than or equal to –1 and less than or equal to +1, i.e. –1

≤ value

≤

+1. The instrument does not allow values outside this range to be entered. If a value less than –1 is entered, the coefficient defaults to –1. If a value greater than +1 is entered, the coefficient defaults to +1.

Unused coefficients must be set to 0.

41


User’s Guide b c d a4 b4

Coefficients

R(.01) a

Certificate Value

Rtpw a5, a6, a7, a8, a9, a10, or a11 b5, b6, b7, b8 or b9 c6 or c7 d a4 or a5 b4 or b5

Consider the following examples.

Example 1:

A PRT was calibrated to ITS-90 and its calibration certificate states values for coefficients R(273.16K), a4, b4, a8, and b8. Set the instrument's coefficients to the certificate values as follows.

c d a4 b4 a b

Coefficients

R(.01)

0.0

0.0

a4 b4 a8 b8

Certificate Value

R(273.16K)

Example 2:

A PRT was calibrated to ITS-90 and its calibration certificate states values for coefficients R(273.16K), a5, and b5. Set the instrument's coefficients to the certificate values as follows.

42

7.9.10

7.9.11

7.9.12


CAL MODE c d a4 b4 a b

Coefficients

R(.01)

0.0

0.0

a5 b5 a5 b5

Certificate Value

R(273.16K)

IEC751

The IEC751 probe type is for standard PRTs (RTDs) conforming to the IEC751 or DIN-43760 standards. This type of probe is generally low cost and has a wide operating range (–180°C to 420°C or higher), but has limited accuracy

(0.15°C to 4°C). There are no user programmable coefficients associated with this probe type. Temperature is converted from resistance based upon the standard PRT table resident in the instrument.

CVD

The CVD (Callendar-Van Dusen) type is used with PRTs that have unique calibration coefficients or do not match the IEC-751 specification. This type of probe is generally low cost, has a wide operating range (–180°C to 420°C or higher), and has moderate accuracy (0.05°C to 1°C). This type uses the

Callendar-Van Dusen equation to calculate temperature from resistance:

r t

°

C

])

=

⎧

⎪

R

0

⎨

⎪

R

0

1

⎨

⎩⎪

⎧

1

+

+

α

α

⎡

⎣

⎡

⎢

⎣

t t

−

−

δ

δ

1

⎛

t

100 100

t

⎛

t

−

1

−

1

⎞

⎠⎟

⎞

⎠⎟

⎤

⎦

− β

⎛

⎝⎜

t

100

−

1

⎞

⎠⎟

⎛

⎝⎜

t

100

⎞

⎠⎟

3

⎤

⎥

⎥

⎭⎪

t t

≥

<

0

0

The coefficients R0,

α

,

δ

, and

β can be set by the user using the functions

“R0", ”Alpha", “Delta”, and “Beta” respectively. When editing “Alpha” there is an assumed 10

–3 exponent (i.e. 3.8500 is actually 0.0038500).

YSI-400

The YSI-400 type is for 2252

Ω thermistors matching the characteristics of the

YSI-400 series of thermistors. This type of probe generally is low cost, has a limited operating range (–40°C to 150°C), good accuracy (0.1°C to 0.4°C), and excellent resolution (0.002°C). There are no user programmable coefficients associated with this probe type. Temperature is converted from resistance based upon a standard YSI-400 table resident in the instrument.

43


User’s Guide

7.9.13

THERM

The THERM type is for thermistors that have unique calibration coefficients or do not match the YSI-400 specification. This type of probe generally has moderate cost, a limited operating range (–40°C to 150°C), excellent accuracy

(0.005°C to 0.01°C) and excellent resolution (0.002°C). This type uses the

Steinhart-Hart equation in the following form:

R T K

Ω = exp[

b

0

+

b T

−

1

+

−

2

+

−

3

]

The coefficients b0 through b3 are usually found on the calibration certificate of the probe. These coefficients are set with the functions “b0", ”b1", “b2", and

”b3". In some cases the equation is used without the b2 term. For this case, the

“b2" coefficient should be set to 0. Consider the following examples.

Example 1:

A thermistor has coefficients for the equation ln(R) as a function of T given as a, b, c, and d. Set the instrument's coefficients to the Report of Calibration values as follows:

Coefficients b0 b1 b2 b3 b c

Report of Calibration Value a d

Example 2:

A thermistor has coefficients for the equation ln(R) as a function of T given as a, b, and c. Set the instrument's coefficients to the Report of Calibration values as follows:

Coefficients b0 b1 b2 b3

Report of Calibration Value a b

0.0

c

7.9.14

Probe Wires

This function sets the number of connecting wires in the probe. The instrument can be used with probes that have two, three, or four wires. Three wires connecting the probe sensor instead of two allows the instrument to partially cancel

44

7.9.15

7.9.16

7.9.17

7.9.18


CAL MODE measurement error due to the resistance of the wires. With four wires the instrument can completely cancel the error. The internal measurement circuit is configured differently depending on the number of wires.

Note:

The instrument tries to calculate a measurement even if the wire settings are incorrect. Therefore, the Probe Wires setting must match the actual number

of wires or loss of accuracy will result (see Section 6.6). Use the

Up

and

Down

buttons to set the value and press the

ENT

button to store and continue.

PCal

This function shows the date the probe was calibrated and allows it to be set.

The date is stored in the INFO-CON connector and is used simply for reference. Use the

Up

and

Down


ENT

button to move to the next date segment to the right. Press

ENT

when the date is correctly entered. Press

CLR

to move to the next function without changing the date.

PDue

This function shows the date the probe is due for calibration and allows it to be set. The date is stored in the INFO-CON connector. The probe due date is regularly checked against the present date and if the calibration has expired the user is alerted with the message “Prb cal expired”. The message disappears only when the probe is recalibrated and the probe calibration due date is set to a future date. To set the date use the

Up

and

Down


ENT


ENT


CLR


If any of the parameters in the CAL Mode were changed, the message “Uploading params” is displayed when exiting the PDue parameter. After the parameters have been uploaded into the INFO-CON connector, the meter advances to the next menu item.

Digital Filter

The digital filter helps to smooth variations in the measurements and improve resolution. A negative effect of filtering is that it tends to slow the response to changes in temperature. You can increase the filter time constant to further improve accuracy and resolution or decrease the time constant to reduce the response time. Valid values are any number between 0.0 and 60.0 seconds. A value of 0.0 disables the filter. The default is 0.0. Use the

Up

and

Down


ENT

button to store and continue. Press

CLR

to move to the next function without changing the filter.

MCal

This function shows the date the instrument was calibrated and allows it to be set. The date is used simply for reference. Use the

Up

and

Down

buttons to set

45


User’s Guide

7.9.19

7.9.20

each date segment and the

ENT

button to move to the next date segment on the right. Press

ENT


CLR


MDue

This function shows the date the instrument is due for calibration and allows it to be set. The meter calibration due date is regularly checked against the present date and if the calibration has expired the user is alerted with the message

“Mtr cal expired”. The message disappears only when the instrument is recalibrated and the meter calibration due date is set to a future date. To set the meter calibration due date, use the

Up

and

Down


ENT


ENT


CLR


CAL1 and CAL2

The CAL1 and CAL2 calibration parameters calibrate the instrument's PRT range and thermistor range respectively. These parameters directly affect the accuracy of the instrument and are only to be altered by an authorized, qualified technician as part of a regular instrument calibration operation. If the instrument is ever reinitialized, these parameters are reset to 0. Refer to the

calibration procedure in Section 9. Use the

Up

and

Down


ENT

button to store and continue. Press

CLR


46

8

8.1

8 Communications Interface

RS-232 Connection

Communications Interface

Remote communications allows an external device, such as a computer, to communicate with the instrument to obtain measurement data and control its operation. Communication is accomplished with various commands issued to the instrument through the RS-232 serial port.

RS-232 Connection

The three-conductor jack for the serial port is located on the top of the instrument near the probe connector. One serial cable is included with the instrument.

Additional or longer cables, of three meters or less, can be constructed by fol-

lowing the wiring diagram shown in Figure 9.

NOTE:

The TxD line on one side connects to the RxD line on the other and vice-versa.

To reduce the possibility of electrical interference, the serial cable should be shielded with low resistance between the connector and the shield. It should not be much longer than is necessary.

Figure 9

RS-232 Wiring

GND

RxD

TxD

GND

TxD

RxD

7

6

9

8

5

4

3

2

1

47


User’s Guide

The protocol for serial communications is 8 data bits, 1 stop bit, and no parity.

Use no flow control.

The baud rate is fixed at 2400, the linefeed to ON (all carriage returns are followed by a linefeed (ASCII decimal 10)), and the duplex to

HALF disabling echo.

The serial port can be used to transmit measurements to a computer or printer.

It can also be used to change settings of the instrument from a computer or in-

terface with software. A full list of commands follows in Section 8.2.

Commands sent to the instrument must end with an EOS character which is a carriage return (ASCII decimal 13) or linefeed character (ASCII decimal 10).

Commands can be sent with upper or lower case letters. Data returned from the instrument ends with a carriage return and a linefeed.

8.2

8.2.1

Read measurement, simple format

Communication Command List

Primary Commands

The following group of commands read or set various functions.

Description

Read measurement, extended format

Command

t[emperature] t

Example

Response

Format

t: 999.999

{C, O, F, R, or K} mm-dd-yyyy hh:mm:ss t: 999.999

{C, O, F, R, or K}

Response

Example

t: 125.745 C

03-01-1999

15:49:15 t: 25.587 C

Read minimum

Read maximum f[etch?] rea[d?] me[asure?] m[inimum] ma[ximum] fetch?

read?

meas?

min max min: 999.999

{C, O, F, R, or K} max: 999.999

{C, O, F, R, or K} min: -14.653 C max: 416.781 C

Clear minimum and maximum cl[ear]

Read data labels

Note: This command also sets the autolog label.

lbnn

Set data labels lbnn=[nnnnnnnn] clear lb01 lb01=ENG lb99: xxxxxxxx Lb01: BATH

Range

0 to 9, A to Z,

-, _, .

Initiate download of demand logged data

Clear demand logged data

Read the number of demand logged readings currently in memory

Read number of readings in autolog memory ddem dclr dlog alog ddem dclr dl alog dl: 999 log:9999 dl: 51 log:10

48


Communication Command List

Description

Set autolog mode on/off .

Command

alog=[ON/OFF]

Note:

Exit Autolog menu to use this command. After alog =ON is sent, the buttons are disabled until the command alog=OFF is sent.

Clear autolog memory aclr

Initiate download of autologged data.

daut

Note: Read Section

11.2 on downloading

autologged data before attempting to use this command.

Read autolog interval

Set autolog interval aint aint=n

Note: See Section 7.4.2

for specifics on log interval.

Read delta(x) measurement dx

Set delta(x) reference to present measurement

Read unit

Set unit

Read serial sample rate

Set serial sample rate

Read resolution digits

Set resolution digits sd[x] u[nit] u[nit]=C/O/F/K/R sa[mple] sa[mple]= n re[solution] re[solution]= n

Read time ti[me]

Set time

Note: You must set hours, minutes, and seconds for the time to be set correctly.

ti[me]=hh:mm:ss

Read identification information *i[dn?]

Example

alog=ON

Response

Format

aclr daut

Response

Example Range

ON or OFF aint aint=30 int: 99 {secs or min} int: 60 {secs or min}

1, 5, 10, 10,

15, 30, 60,

120, 300, 600,

900, 1800,

3600 dx sd u u=C sa sa=60 res res=0 time ti=08:15:00 dx: 999.999

{C, O, F, R, or K} dx: -0.118 C u: {C, O, F, R, or K} u: C sa: 99999 res: 9 ti: hh:mm:ss sa: 10 res: 3 ti: 16:23:45

C, O, F, K, R

0 to 10,000

1 to 3

00:00:00 to

23:59:59

*idn?

Read model and firmware version

Legend:

*v[ersion] *ver

[] Optional Command data

{} Returns either information

<manufacturer>,

<model>,

<serial number>,

<firmware version> ver.<model>,

<firmware version>

Hart,

1522

95001,

1.24

ver.1522,

1.24

49


User’s Guide

Description Command Example

n Numeric data supplied by user

9 Numeric data returned to user x Character data returned to user

Response

Format

Response

Example Range

8.2.2

Calibration Commands

The following group of commands directly or indirectly affect the accuracy of the instrument. These commands should only be used by qualified, authorized personnel.

Calibration parameters can only be changed if protection is disabled by entering the proper pass-code using the command *pas= ddddd.

Entering an invalid passcode or cycling the power re-establishes protection of the calibration parameters. The parameters can be read without disabling passcode protection.

Example

*pas=12345

Response

Format

Response

Example Range Description

Unprotect calibration parameters with the pass-code

Read passcode protection state

Read date

Set date

Command

*pas[scode]=nnnnn

*pas da[te] da[te]=yyyy-mm-dd

*pas date da=1999-03-28 ps: 9 Ps: 0 0 or 1

Read probe serial number

Set probe serial number

Read probe type

Set probe type

Read ITS-90 R(.01) or CVD R0 r[0]

Set ITS-90 R(.01) or CVD R0 r[0]=n

Read ITS-90 coefficient a/b/c/d/a4/b4

Set ITS-90 coefficient

Read CVD coefficient

Set CVD coefficient

Read THERM thermistor coefficient

Set THERM thermistor coefficient se[rial] se[rial]=xxxxxxxxxx p[robe] p[robe]=IT[S-90]/

IE[C751]/ C[VD]/

Y[SI400]/ T[HR] a/b/c/d/a4/b4=n al[pha]/de[lta]/be[ta] a=-2.8644E-5 al al[pha]/de[lta]/be[ta]=n al=0.0038512

b0/b1/b2/b3 b0/b1/b2/b3=n ser ser=001 pr pr r0 r0=100.106

a b3 b3=-9.944E-12 da: yyyy-mm-dd

{b0/b1/b2/b3}:

9.999999E-99 da: 1999-03-28

1999-01-01 to

2100-12-31 ser: xxxxxxxxxx ser: 100231A

0 to 9, A to Z,

., -, / pr: {ITS-90, IEC751,

CVD, YSI400, THERM} pr: ITS-90 r0: 999.999

{a/b/c/d/a4/b4}:

-9.999999E-99

ITS-90,

IEC751,

CVD, YSI400,

THERM r0: 100.035

a: -2.8644101E-05

1 to 900

1.0 to 9.9e-18

{al/de/be}: 9.99999999 al: 0.00385762

Coefficient

Dependent b3: -9.944070E-12

E+/-18

50


Communication Command List

Description

Read probe wires

Set probe wires

Read probe calibration date

Set probe calibration date

Read probe due date

Set probe due date

Read filter

Set filter

Read low range calibration

Set low range calibration

Read high range calibration

Set high range calibration

Read meter calibration date

Set meter calibration date

Command

w[ires] w[ires]=2/3/4 pc[al] pc[al]=yyyy-mm-dd

*c2

*c2=n mc[al] mc[al]=yyyy-mm-dd

Example

wi wi=4 pcal pc=1999-03-28 pd[ue] pd[ue]=yyyy-mm-dd pdue pd=1999-03-28 fi[lter] fi[lter]=n

*c1

*c1=n fi fi=0

*c1

*c1=-0.012

Response

Format

wi: 9 pc: yyyy-mm-dd pd: yyyy-mm-dd fi: 99.999999

*c1: 9.999

*c2

*c2=-0.9

mcal mc=1999-03-28

*c2: 9999.9

mc: yyyy-mm-dd

Read meter due date

Set meter due date

Legend: md[ue] mdue md[ue]=yyyy-mm-dd md=1999-03-28 md: yyyy-mm-dd

[] Optional Command data

{} Returns either information n Numeric data supplied by user

9 Numeric data returned to user x Character data returned to user

Response

Example

wi: 4

Range

2,3,4 pc: 1999-03-28

1971-01-01 to

2099-12-31 pd: 1999-03-28

1971-01-01 to

2099-12-31 fi: 0.5

0.0 to 60.0

*c1: -0.0121

*c2: -0.9

mc: 1999-03-28

–1980.0 to

1980.0

1971-01-01 to

2099-12-31 md: 1999-03-28

–1.999 to

1.999

1971-01-01 to

2099-12-31

51

9

9.1

9.2

9 Calibration

Required Equipment

Calibration

The 1522 should be calibrated at regular intervals to ensure that it continues to measure with proper accuracy. Calibration should only be done by qualified, authorized personnel.

Required Equipment

The following items are required to test and calibrate the 1522:

•

0

Ω four-wire resistor (short)

•

25

Ω four-wire resistor, accurate within 20 ppm (±0.0005

Ω

)

•

100


Ω

)

•

400


Ω

)

•

4 k


Ω

)

•

10 k


Ω

)

•

40 k

Ω four-wire resistor, accurate within 50 ppm (±2

Ω

)

•

100 k

Ω four-wire resistor, accurate within 50 ppm (±5

Ω

)

•

500 k


Ω

)

Each resistor must be attached with an INFO-CON probe connector. The 25

Ω

,

100

Ω

, and 400

Ω resistors must be programmed with the CVD probe type with units set to ohms. The 4 k

Ω

, 10 k

Ω

, 40 k

Ω

, 100 k

Ω

, and 500 k

Ω resistors must be programmed with the THERM probe type with units set to ohms.

Calibration Procedure

Calibration requires adjustment of the CAL1 and CAL2 parameters at 100

Ω and 10 k

Ω

respectively (see Section 7.9.20). The calibration parameters can be

accessed from the front panel by pressing the

MODE

button and holding it for three seconds, releasing it, then pressing the

ENT

button (see Section 7.9). You

must enter the pass-code to continue (see Section 7.9.4). The step-by-step pro-

cedure is as follows:

1. Connect the 100

Ω resistor. Adjust the CAL1 parameter by subtracting the measured error. For example, if the resistor is exactly 100.000

Ω and the 1522 measures 100.029

Ω

, CAL1 should be adjusted by subtracting 0.029 from the current value of CAL1.

2. Verify the accuracy at 0

Ω

, 25

Ω

, 100

Ω

, and 400

Ω

.

3. Connect the 10 k

Ω resistor. Adjust the CAL2 parameter by subtracting the measured error. For example, if the resistor is exactly 10.0000 k

Ω and the 1522 measures 10.0029 k

Ω

, CAL2 should be adjusted by subtracting 2.9 from the current value of CAL2.

53


User’s Guide

4. Verify the accuracy at 0

Ω

, 4k

Ω

, 10 k

Ω

, 40 k

Ω

, 100 k

Ω

, and 500 k

Ω

.

5. Set the meter calibration date to the present date (see Section 7.9.18).

6. Set the meter due date to a user defined date (see Section 7.9.19).

54

10

10 Maintenance

Maintenance

•

This instrument has been designed with the utmost care. Ease of operation and simplicity of maintenance have been a central theme in the product development. With proper care the instrument should require very little maintenance. Avoid operating the instrument in oily, wet, dirty, or dusty environments.

•

If the outside of the instrument becomes soiled, it may be wiped clean with a damp cloth and mild detergent. Do not use harsh chemicals on the surface which may damage the LCD or the plastic outside shell.

•

If a hazardous material is spilt on or inside the equipment, the user is responsible for taking the appropriate decontamination steps as outlined by the national safety council with respect to the material.

•

Before using any cleaning or decontamination method except those recommended by Hart, users should check with an Authorized Service Cen-

ter (see Section 1.3) to be sure that the proposed method will not damage

the equipment.

•

If the AC adapter becomes damaged, have it replaced immediately. Never disassemble the AC adapter or attempt to repair it.

•

If the instrument is used in a manner not in accordance with the equipment design, the operation of the thermometer readout may be impaired or safety hazards may arise.

55

11

11.1

11 Troubleshooting

An Error Message Is Displayed

Troubleshooting

In case you run into difficulty while operating the 1522, this section provides some suggestions that may help you solve the problem. Below are several situations that may arise followed by possible causes of the problem and suggested actions you might take.

An Error Message Is Displayed

The following table lists possible error messages, their causes, and suggested actions.

Problem

“Recharge Needed”

“--------”

“Probe is locked”

“Prb cal expired”

“Mtr cal expired”

“Invalid Passcode”

The instrument display is blank when normally it should show measurements.

“Uploading params”

Solution

The battery is low and needs to be recharged.

When this message first appears the user has approximately 30 minutes of charge left. If the battery is not recharged, the 1522 continues to operate until the battery drops below 0% and then automatically shuts itself off after displaying the error message.

The display shows ‘ - - - - - - - ‘.

The instrument is unable to detect that a probe is connected. Check that a probe with a properly programmed INFO-CON connector is attached.

The incorrect probe is attached.

The meter is set to accept only the probe with the given serial number. Attach the correct probe or have the instrument properly programmed for the new probe. See Section

7.9.6, Probe Lock.

The probe calibration has expired.

Have the probe calibrated and the calibration due date reset.

The meter calibration has expired.

Have the instrument calibrated and the calibration due date reset.

The passcode entered was not correct.

Check the passcode on the

Passcode Notice sent with the instrument.

Make sure the instrument has power, either from the batteries or the AC adapter.

Verify that the initialization information appears on the display when the power is switched on. Check to make sure that a probe is properly connected. Check to make sure that the INFO-CON connector is programmed properly.

Probe parameters have been edited. The probe parameters were edited in the CAL Mode and either the MODE button was pressed while in the CAL Mode of the MODE button was pressed after scrolling through the CAL mode and leaving the PDue parameters. After the parameters have been uploaded into the INFO-CON probe connector, the meter advances to the next display mode or to the next function in the CAL Mode.

57


User’s Guide

11.2

Problem

While attempting to measure resistance the display shows an incorrect value.

Memory Check Error

Solution

Poor or incorrect connection of the probe.

ing carefully (see Figure 7).

A common mistake is to connect the wires of the probe to the wrong terminals. Check the wir-

Open, shorted, or damaged sensor or lead wires.

Check the resistance across the sensor using a handheld DMM. Also check the resistance between common pairs of leads. Check to make sure there is no conductivity between any of the leads and the probe sheath. Use a good-quality sensor to avoid errors caused by drift, hysteresis, or insulation leakage.

Stem conduction error.

Make sure the stem of the probe is immersed in the medium with adequate depth and a tight fit.

Electrical interference.

Intense radio-frequency radiation near the

1522 or the probe can induce noise into the measurement circuits resulting in erratic readings. Try eliminating the source of interference or moving the 1522 to a different location. A well-grounded, shielded cable should be used for the probe.

Memory Recover X.

A critical parameter (CAL1, CAL2, or Passcode) is corrupt and the instrument can recover the correct value for that parameter. Press any key and the display reads “Check Settings”. Press any key again to resume normal operation. Also, check other settings in the thermometer (if used), such as, filter, units, and resolution. The number following the message is used by authorized technicians.

Memory Invalid!

A critical parameter (CAL1, CAL2, Passcode, Meter Due Date, Meter

Cal Date, or Serial Number) is corrupt and the instrument cannot recover the correct value for that parameter. Press any key and the display reads “Contact Factory”. Contact a Hart Authorized Service

Center (see Section 1.3) for assistance in guiding you through the process of reentering these parameters.

Note: The parameters stored in the INFO-CON, Probe Wires, Probe

Type,

Probe Parameters, are not checked by the meter during memory testing.

Downloading Autologged Data

The 1522 Handheld Thermometer readout stores up to 10,000 readings in its autolog memory. These readings can be downloaded to a computer using the

RS-232 serial port. By default, the 1522 serial port operates at 2400 baud.

However, when downloading autologged readings over the serial port or printing to a serial printer, the instrument temporarily changes its baud rate to 9600 baud to reduce the download time.

The following steps should be followed to download autologged data using the serial port:

1.

Connect the instrument to a COM port on the computer using the serial cable.

2.

Run a terminal program such as Windows® Terminal or

HyperTerminal®.

58

11.3


Placement of Infrared Dongle for IR Data Transfer a) Set up the terminal program to use the correct COM port and operate at 2400 baud, 8 data bits, 1 stop bit, no parity, no flow control.

b) If you want to save the downloaded data to a file, configure your terminal program to capture the incoming text and save it to a text file.

Refer to your terminal program's documentation for details on how to do this.

3.

To determine how many autologged readings are stored in the instrument's memory, send the command "ALOG". If the response to the

"ALOG" command is "0", there are no readings to download.

4.

To begin downloading the autologged data, send the command "DAUT" to initiate the download process. The 1522 then sends a response to the terminal program indicating that the baud rate needs to be set to 9600.

The 1522 automatically switches its baud rate to 9600 baud and waits to receive this same command again at 9600 baud.

a) In the terminal program, change the baud rate setting to 9600 baud.

The terminal program connection may need to be disconnected and reconnected to enable the baud rate.

b) Send the command "DAUT" once again at the new baud rate. The

1522 should immediately begin downloading the data at 9600 baud. If no readings have been stored, the 1522 will not respond to "DAUT" command.

c) When downloading is complete, the 1522 automatically sets its baud rate back to 2400 baud.

d) If the terminal program was set to capture the incoming data to a file, stop capturing at this time.

e) In the terminal program, change the baud rate setting back to 2400 baud.

f) If you wish to abort the download process before it has completed, press 'CLR' on the front panel of the 1522. The 1522 sets its baud rate back to 2400 baud automatically. Reset the terminal program's baud rate to 2400 baud.

5.

If the response to the "ALOG" command was not "0" and the 1522 does not respond to the "DAUT" command, turn the 1522 off, then back on again and repeat steps 3-4.

Placement of Infrared Dongle for IR Data

Transfer

The 2374 IR Dongle should be placed no further than 0.5 meters away from the infrared window on the 1522 and within a ±15° angle. Placement of the IR dongle within the triangle area shown below will allow correct data transmis-

59


User’s Guide sion. For best results, place the IR dongle and the IR window on the 1522 at an angle of 0° and within 0.5 meters.

Figure 10

Infrared Dongle Position

11.4

11.4.1

11.4.1.1

CE Comments

EMC Directive

Hart Scientific’s equipment has been tested to meet the European Electromagnetic Compatibility Directive (EMC Directive, 89/336/EEC). The Declaration of Conformity for your instrument lists the specific standards to which the unit was tested.

The instrument was designed specifically as a test and measuring device. Compliance to the EMC directive is through IEC 61326-1

Electrical equipment for measurement, control and laboratory use – EMC requirements (1998).

As noted in the IEC 61326-1, the instrument can have varying configurations.

The instrument was tested in a typical configuration with shielded, grounded probe and RS-232 cables. Emissions may, in non-typical applications, exceed the levels required by the standard. It is not practical to test all configurations, as the manufacturer has no control over the probes the user may connect to the instrument.

Immunity Testing

The instrument was tested to the requirements for industrial locations. This allows the instrument to be used in all types of locations from the laboratory to the factory floor. Criterion B was used for Radiated RF (IEC 61000-4-3) and

Conducted RF (IEC 61000-4-6). Therefore, the operation of the instrument may be affected by excessive electromagnetic interference and the instrument may not perform within the normal specification limits in such an environment.

Criterion C was used for Electrostatic Discharge (ESD, IEC 61000-4-2) and

60

11.4.1.2

11.4.2


CE Comments

Electric Fast Transit (EFT, Burst, IEC 61000-4-4). If the instrument is subjected to EFT conditions at 2kV, the instrument may require the user to cycle the power to return to normal operation.

Emission Testing

The instrument fulfills the limit requirements for Class A equipment but does not fulfill the limit requirements for Class B equipment. The instrument was not designed to be used in domestic establishments.

Low Voltage Directive (Safety)

In order to comply with the European Low Voltage Directive (73/23/EEC),

Hart Scientific equipment has been designed to meet the IEC 1010-1 (EN

61010-1) and the IEC 1010-2-010 (EN 61010-2-010) standards.

61