OAKTON 800 pH/ORP Controller Operating Instructions
Below you will find brief information for pH/ORP Controller 800. This document provides instructions for assembling, installing, calibrating, and using the pH/ORP controller. The device is intended for measuring either pH or ORP with on/off control, helping regulate water treatment and monitoring, chemical processing, food processing, and waste water control. It includes instructions on setting up the temperature sensors, using the HOLD function, and accessing the advanced set-up mode.
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13. Warranty
OAKTON warrants this controller to be free from significant deviations in material and workmanship for a period of three years from date of purchase. If repair or adjustment is necessary and has not been the result of abuse or misuse within the warrantied time period, please return—freight prepaid—and correction will be made without charge. OAKTON alone will determine if the product problem is due to deviations or customer misuse.
Out-of-warranty products will be repaired on a charge basis.
14. Return of items
Authorization must be obtained from our Customer Service Department before returning items for any reason. When applying for authorization, please include data regarding the reason the items are to be returned. For your protection, items must be carefully packed to prevent damage in shipment and insured against possible damage or loss. We will not be responsible for damage resulting from careless or insufficient packing. A restocking charge will be made on all unauthorized returns.
NOTE: We reserve the right to make improvements in design, construction, and appearance of products without notice.
OPERATING INSTRUCTIONS
OAKTON 800 series
1
⁄
4
DIN pH/ORP
Controller
CAL
ENTER
ESC
MEAS pH/ORP Controller
800 Series
REL A
REL A
REL B pH
°
C
ATC
ALARM
00702-77 R1 Printed in the U.S.A. 9/99
Table of Contents
1. Introduction
..............................................................................................................4-5
2. Assembly and Installation
..............................................................................6-11
2.1 Typical measurement and control system
..............................................................6
2.2 Unit dimensions
..........................................................................................................7
2.3 Back panel
....................................................................................................................8
2.4 Electrical connections
................................................................................................9
2.5 Probe connections
....................................................................................................10
2.6 HOLD function
..........................................................................................................11
3. Overview: keypad and display
..................................................................12-14
3.1 Keypad
........................................................................................................................12
3.2 Display
........................................................................................................................13
3.3 LED indicators
..........................................................................................................14
4. Starting up
..................................................................................................................15
5. Calibration mode
..............................................................................................16-18
5.1 pH calibration
......................................................................................................16-17
5.2 ORP (mV) calibration
..............................................................................................18
6. Advanced Set up mode
..................................................................................18-40
6.1 Advanced set up mode overview
........................................................................19-20
6.2 OFS: Offset sub group
........................................................................................22-23
6.2.1 Calculating the pH electrode offset value ....................................................23
6.2.2 Entering the pH offset value ..........................................................................23
6.3 SET °C: Temperature settings
............................................................................24-28
6.3.1 Selecting automatic or manual temperature compensation ......................25
6.3.2 Temperature sensor calibration (ATC mode only) ......................................26
6.3.3 Manual temperature compensation ..............................................................27
6.3.4 Setting process temperature ............................................................................27
6.3.5 Setting calibration temperature ......................................................................28
6.4 SP1 (SP2): Set up for Relay 1 and Relay 2 subgroup
....................................29-34
6.4.1 Selecting relay set point values ......................................................................30
6.4.2 Selecting relay as high or low set point ........................................................31
6.4.3 Selecting a hysteresis (dead band) value ......................................................32
6.4.4 Setting an on-delay time lag............................................................................33
6.4.5 Setting an off-delay time lag ..........................................................................34
6.5 CONF: Configuration subgroup
......................................................................35-37
6.5.1 Selecting pH or ORP measurement units......................................................36
6.5.2 Reverting to default settings ..........................................................................37
6.6 CAL: Calibration subgroup
..............................................................................38-40
6.6.1 pH calibration....................................................................................................39
6.6.2 ORP (mV) calibration ......................................................................................40
7. Specifications
..........................................................................................................41
8. Accessories
..........................................................................................................42-43
9. Appendix 1: Factory default settings
......................................................44
10. Appendix 2: Symmetrical mode
................................................................45
11. Appendix 3: Jumper positions
......................................................................46
12. Index
............................................................................................................................47
13. Warranty
..................................................................................................................48
14. Return of items
....................................................................................................48
1. Introduction
Thank you for purchasing a microprocessor-based OAKTON 800-series
1
⁄
4
DIN pH/ORP controller. You can use this unit to measure either pH or ORP with on/off control. This controller has many user-friendly features; some of its features include:
• A menu-driven program that simplifies set-up
• Large dual display shows pH (ORP) and temperature along with multiple annunciators
• Two set point, two SPDT relay
operation
for lo/lo, lo/hi, hi/lo or hi/hi control
• Fast-responding on/off control
• 0 to 2000 second time delay
adjustment
on all relays— minimizes false alarms
• Separately adjustable high and low
set point hysteresis bands
prevent rapid contact switching if your pH
(ORP) value is fluctuating near the set point
• 4-20 mA transmitter/recorder output for remote monitoring and hard copy recording
• Protection against electromagnetic interference—galvanically isolated
output
• Push button two-point calibration and electrode offset adjustment from the keypad
• Easy, fast calibration with auto
buffer recognition
• LED indicators signal control activities to monitor controller status from a distance
• Nonvolatile memory maintains setup even when power fails
Use the 800-series controller in panel-mounted enclosures for applications such as:
• water treatment and monitoring
• chemical processing
• food processing
• waste water control.
CAL
ENTER
ESC
MEAS
pH/ORP Controller
800 Series
REL A
REL A
REL B pH
°
C
ATC
ALARM
Included with your controller
Your controller includes:
• 17-way and 5-way right angled terminal block (one each)
• side threaded rod with catch (two)
• receptacle cable lug (one)
• rubber gasket (one)
About the manual
Please read the first five sections carefully. Section 6 is designed so you can either read the whole section linearly, or skip to the sections that are pertinent to your application. You may want to read through these sections in entirety to familiarize yourself with all of the controller’s features.
If you have any questions about this controller, please contact your OAKTON distributor.
Please read through this manual carefully before installing and operating your controller.
2. Assembly and Installation
2.1
Typical Measurement and Control System
A typical measurement system consists of:
• power source
• the OAKTON 800-series controller
• a pH (or ORP) combination electrode with integrated or separate temperature sensor (Pt 100 or 1000)
• installation hardware for electrode
• an appropriate pH or ORP measurement cable
• a final control element such as a pump or valve
• a recorder (optional)
110/220
VAC
6 A max
CAL
ENTER
ESC
MEAS pH/ORP Controller
800 Series
REL A
REL A
REL B pH
°
C
ATC
ALARM
4-20 mA input signal chart recorder pH electrode installation hardware for electrode
(i.e tee fitting)
Pump/Valve/Other
Pump/Valve/Other
2.2
Unit dimensions
The field-tested control panel housing is 3.78" x 3.78" (96 x 96 mm).
The front panel meets protection class IP 54.
Flat Gasket: 1 mm thick
(Installed by customertapered corners on top)
Side View
(with mounting brackets)
,
Panel Thickness: 45 mm maximum
96 mm
9 mm maximum
,
9 mm thick
175 mm maximum
160 mm
Mounting Bracket (2 included)
Top View
(with mounting brackets)
14 mm
92 mm
56 mm
32 mm
110 mm
184 mm maximum
2.3
Back panel
The back panel consists of two different connectors: the 17-way PCB edge connector and the 5-way screw terminal connector.
pH/mV
Pt100/
Pt1000
0V/
PAL
S/
18 19 20 21 22
FUSE250VAC
100mA (F)
RELAY1 RELAY2
NC NC NC
HOLD
NC
-
L N PE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
+
2.4
Electrical Connections
CAUTION:
Electrical shock hazard! Make sure to remove AC power to the controller before wiring input and output connections, and before opening the controller housing.
Power
Mains
Relay
1
Relay
2
1 2 3 4 5 6 7 8 9 10 11 12
Hold
Input
Signal
Output
13 14
15 mA
–
+
16 17
AC: L N PE
1.
VAC live wire
2.
VAC neutral wire
3.
VAC protective ground wire
NOTE: Power is selectable for 110 or 220 VAC via an internal jumper.
Factory setting is indicated on the label on top of the controller.
See Appendix 3 on page 46 for directions on switching the power type .
4.
Low set relay resting position
5.
Low set relay common
6.
Low set relay working position
7.
High set relay resting position
8.
High set relay common
9.
High set relay working position
10.
No connection
11.
No connection
12.
No connection
13.
Hold function switch terminal 1
14.
Hold function switch terminal 2
15.
No connection
16.
4 - 20 mA for – current connection
17.
4 - 20 mA for + current connection
2.5
Probe connections
pH/mV
BNC connector
Pt100/
Pt1000
0V/
PAL
S/
18 19 20
21
22
18.
Pt100/Pt1000 lead 1 terminal (compensating)
19.
Pt100/Pt1000 sense lead terminal (three-wire RTD)
20.
Pt100/Pt1000 sense lead 2 terminal
NOTE:
If using a two-wire RTD, short terminal 19 to terminal 18.
NOTE:
Pt100/Pt1000 is selectable via an internal jumper. Factory default is
Pt100. See Appendix 3 on page 46 for directions on switching the
RTD type.
21.
pH/ORP lead 1 (solution ground, or potential matching pin)
22.
pH/ORP lead 2 (shield)
Connect any pH or ORP electrode with a BNC connector to the BNC connector located the upper right side of the controller back panel.
IMPORTANT:
when using controller in symmetrical mode, be sure to connect solution ground (potential matching pin) to terminal 21. Failure to connect potential matching pin will result in unstable, erroneous readings. See Appendix 2 on page 45 for more information on symmetrical mode.
2.6
HOLD function
The HOLD function lets you force the relays to their resting position by applying a contact closure across terminals 13 and 14.
When the HOLD function is activated, the HOLD indicator will appear on the display (see page 13 for a diagram of display characters).
Typical applications:
Float or level switch:
Connect to a float switch in your reagent feed tank to shut down pumps or tanks when out of reagent.
Flow switch:
Connect to a flow switch to shut down pumps or valves when the process stream is shut down.
Dual pH/ORP control:
Connect relay of pH controller to hold input of the ORP controller to ensure that Reducing/Oxidizing agent is only added when at a specified level for both pH and ORP..
Typical level switch wiring
Power
Mains
Relay
1 pH/ORP controller
Relay
2
Hold
Input
1 2 3 4 5 6 7 8 9 10 11 12
Signal
Output
13 14 15 mA
– +
16 17
AC: L N PE
Level switch
Typical dual controller wiring
Power
Mains
Relay
1 pH controller
Relay
2
Hold
Input
Signal
Output
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 mA
– +
16 17
AC: L N PE AC: L N PE
Power
Mains
Relay
1
ORP controller
Relay
2
Hold
Input
1 2 3 4 5 6 7 8 9 10 11 12
Signal
Output
13 14 15 mA
– +
16 17
3. Overview: Keypad and display
3.1
Keypad
Calibration key
Lets you:
1.
Perform rapid 1- or 2-point calibration.
Enter key
Lets you:
1.
Select individual parameters within the parameter group.
2.
Store input data in the Set-up mode.
3.
Start calibration in the Calibration mode.
CAL
ENTER
▲ and ▼ keys
▲
▼
Let you:
1.
Select various parameter groups.
2.
Set parameters and numerical values in the Set-up mode.
If you continuously hold the button, the setting speed increases.
3.
Return to the Measurement mode when both keys are pressed at once.
3.2
Display
The LCD display features two numerical displays that show measured values and status messages for easy, quick reference. The display provides short-text information for configuration and for setting parameters.
• The upper (primary) display shows pH or ORP readings
• The lower (secondary) display shows temperature readings
SETUP MEAS CAL
CON pH mV
HOLD
ERR pH
°
C
ATC
The LCD display area includes the following indicators:
HOLD:
HOLD indicator
SETUP:
Advanced Set-up mode
MEAS:
Measurement mode
CAL:
Calibration mode
CON:
Confirmation indicator
ERR:
error/alarm indicator
°C:
temperature units
ATC:
indicates automatic temperature compensation
: buffer indicator
: electrode indicator
3.3
LED Indicators
The LED indicators provide a quick way to check controller status. They show whether a parameter within its set limits (green light) or outside its set limits
(red light).
Relay A
GREEN — Measured value is within limit entered for Set-point 1.
RED — Measured value is outside limit entered for Set-point 1.
Relay B
GREEN — Measured value is within limit entered for Set-point 2.
RED — Measured value is outside limit entered for Set-point 2.
REL A
REL A
REL B
Alarm
NONE — No alarm condition exists.
RED — Alarm condition exists. Measured value has been outside of set-point 1, set-point 2, or both for longer than set relay delay time value. This indicator also will light if the temperature sensor fails. The error indicator will also appear on the display.
ALARM
4. Starting up
When you initially connect power to the controller, it will automatically enter
Measurement mode. This controller features a large dual display.
• The upper display will show the present pH (ORP) value
• The lower display will show the temperature value
In normal measurement mode, the display will appear as shown in the figure at right.
The readings will be in pH or ORP (mV), depending on set up mode selection—see page 36 for more information.
If ATC is selected on, the ATC indicator appears. If manual temperature selection is chosen, the ATC annunciator will be off.
When the controller is in ATC mode, and the temperature sensor wire is broken or disconnected, an error message will be displayed, plus the alarm LED indicator and relay will be activated. See page 25 for information on selecting or deselecting
ATC.
MEAS pH
°
C
ATC
5. CALIBRATION mode
You can reach the Calibration mode in two ways:
•
From calibration mode.
From measurement mode, press the CAL key.
•
From advanced set up mode.
From measurement mode, press the ENTER key.
Press the ▲ and ▼ keys to scroll to set up mode “CAL PH”.
SETUP
HOLD
HOLD
CAL
CAL mV pH pH pH
A
B
C
5.1
pH Calibration
This unit features seven preset buffer values (pH 1.00, 4.00, 6.86, 7.00, 9.00, 9.18 or
10.00) for fast auto-calibration at two points.
When you calibrate this instrument, you need a standard pH buffer solution that matches one of these values.
NOTE:
You must calibrate at either pH 7.00
or pH 6.86 for the first calibration.
1.
Enter Calibration mode
. From measurement mode, press the CAL key.
See figure
A
NOTE:
The upper and lower display should read CAL pH. If they read CAL OrP, see section 6.5.1 on page 36 for directions on how to switch from ORP to pH readings.
2.
Press the ENTER key. The upper display shows the slope in mV from the most recent calibration. The lower display will show the offset as the pH reading at
0 mV electrode output.
See figure
B
3.
Press the ENTER key again
to begin calibration. The “CAL” and buffer indicators appear on the display.
The upper display shows your present uncalibrated reading. The lower display indicates one of the preset pH buffer values.
4.
If necessary, press the ▲ and ▼ keys to scroll the lower display to the buffer value that matches your standard solution.
See figure
C
5.
Make sure the electrode is in your buffer solution
. In ATC mode, you must also immerse the temperature sensor in the buffer solution. In the symmetrically high-resistance measurement mode, you must also immerse the solution ground
(potential equalization pin) in the buffer.
6.
Press the ENTER key
to confirm the buffer value. The electrode indicator and
CAL indicator will both flash.
7.
Allow the electrode to stabilize.
You can press the ENTER key to enter the calibration value. If you do not press the ENTER key, the controller will automatically enter the calibration value when the electrode reading is stable.
8.
Repeat steps 4 through 7 with a second buffer for the second calibration point.
See figure
D
9.
After calibrating to a second buffer value, this controller automatically displays the new slope in the upper display and new offset in the lower display.
10.
If you entered the Calibration mode using the CAL key, press the CAL key
again
to return to the measurement mode. Or, press ▲ and ▼ (escape) together to return to measurement mode.
HOLD
CAL pH pH
D
Notes
If there is a calibration error, the controller flashes the buffer and electrode icons.
If this happens, push both ▲ and ▼ (escape) to restart the calibration beginning from step 1.
When calibrating with manual temperature compensation, the controller automatically changes from the preset process temperature to the preset calibration temperature.
After leaving the Calibration mode, the controller switches back to the process temperature. To set the calibration temperature and the process temperature, see pages 27-28.
The slope and offset are re-determined after each calibration.
SETUP
HOLD
HOLD
CAL mV
A
B
5.2
ORP Calibration
1.
Enter Calibration mode
. From measurement mode, press the CAL key.
See figure
A
NOTE:
If the upper and lower display read
CAL PH, see section 6.5.1 on page 36 for directions on how to switch from pH to
ORP readings.
2.
Place sensor in the calibration solution.
3.
Press the ENTER key
to begin calibration. The “CAL” indicator will appear on the display. The upper display shows the current mV output of the electrode without any offset adjustment.
See figure
B
4.
Determine the mV value of your solution with a meter known to be accurate.
5.
Press the ▲ and ▼ keys to offset the mV value on the controller display to match the value of the solution you are measuring.
6.
To return to Measurement mode,
press the ENTER key
again.
6. Advanced set up mode
The OAKTON 800-series pH/ORP controller features six sub groups that organize all set-up parameters. These parameters let you customize your controller for your exact process.
The sub groups are:
1.
Offset adjustment (OFS)
2.
Temperature settings (SEt °C)
3.
Control Relay 1 configuration (SP1)
4.
Control Relay 2 configuration (SP2)
5.
Controller configuration (ConF)
6.
pH (ORP) calibration
(CAL pH or CAL ORP)
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
6.1
SETUP
HOLD
Advanced set-up mode sub group overview
OFS: Offset mode
Available during pH operation only:
• Set probe offset value
See pages 22-23 for complete offset mode set up instructions
SETUP
HOLD
See pages 24-28 for complete temperature settings set up instructions
SETUP
HOLD
SET °C: Temperature settings
Available during pH operation only:
• Toggle automatic temperature compensation (ATC) on or off
If ATC selected on:
• Temperature sensor calibration
If ATC selected off:
• Set process temperature
• Set calibration temperature
SP1: Set up for relay 1
• Select value for relay 1
• Select relay as low or high set point
• Set hysteresis (dead band)
• Set time delay for when relay switches on
• Set time delay for when relay switches off
See pages 29-34 for complete Control Relay 1 set up instructions
SETUP
HOLD
SP2: Set up for relay 2
• Select value for relay 2
• Select relay as low or high set point
• Set hysteresis (dead band)
• Set time delay for when relay switches on
• Set time delay for when relay switches off
See pages 29-34 for complete Control Relay 2 set up instructions
SETUP
HOLD
ConF: Controller configuration
• select pH or ORP measurement, plus symmetrical or asymmetrical mode
• Reset to controller default settings
See pages 35-37 for complete controller configuration set up instructions
SETUP
HOLD
CAL pH (ORP): pH (ORP) Calibration
• Calibrate first value
• Calibrate second value
• Automatic display of slope and offset after second calibration point
See pages 38-40 for complete calibration set up instructions
6.2
OFS: Offset sub group
OFS: Offset subgroup overview
The Offset sub group lets you:
1
Set pH probe offset value
This sub group is available during pH operation only.
SETUP
HOLD
1
SETUP
HOLD pH pH
6.2.1 Calculating the pH electrode offset value
NOTE:
you can only perform electrode offset in the pH mode.
The offset sub group lets you change the pH probe offset without removing the probe from your system. You can make adjustments of up to ±120 mV of the displayed value.
The controller will add or subtract the offset value from the measured pH and display the correct value. However, if you need to offset the value beyond the average offset you would expect in your application type, consider a full calibration or even electrode replacement. To determine your pH offset value:
1.
Pull a grab sample from your system.
Record the controller’s pH reading at the time you take the sample.
2.
Measure the pH of your grab sample using a calibrated pH meter.
Record the correct pH value.
3.
Subtract the the controller’s reading from the correct pH value (found in step 1).
This value is your offset.
6.2.2 Entering the pH offset value:
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows OFS.
3.
Press the ENTER key.
The lower display shows the current measured pH value. The upper display shows the current offset value.
See bold figure at right.
4.
Press the ▲ and ▼ keys to adjust the offset value until the upper display shows the offset value calculated as explained in directions above .
As you adjust the offset value, the lower display will update to match the current reading plus the electrode offset.
SETUP
HOLD
SETUP
HOLD
5.
Press the ENTER key
to enter the offset value.
6.
Press the ▲ and ▼ keys together to return to measurement mode.
Notes
The offset value is reset during full calibration. See Section 5 starting on page 16 for pH calibration instructions.
pH pH
6.3
SET °C: Temperature settings
SET °C: Temperature settings
The temperature settings sub group lets you:
1
Toggle automatic temperature compensation (ATC) on or off
If ATC selected on:
2
Temperature sensor calibration
If ATC selected off:
3
Set process temperature
4
Set calibration temperature
This sub group is available during pH operation only.
SETUP
HOLD
1
SETUP
HOLD
2
SETUP
HOLD
1
SETUP
HOLD
3
SETUP
HOLD
SETUP
HOLD
4
This set up group has two different sub paths. The screens you see depend on if you select ATC on or off.
6.3.1 Selecting automatic or manual temperature compensation
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows
SEt °C.
3.
Press the ENTER key.
The lower display will show “Atc”; the upper display will show “on” or “oFF”.
See figures at right
4.
Press the ▲ and ▼ keys to toggle between ATC on and off.
5.
Press the ENTER key
to confirm selection.
6.
• If you selected ATC on:
Proceed to step 3 of section 6.3.2
• If you selected ATC off:
Proceed to step 3 of section 6.3.4
• To return to Measurement mode:
Press the ▲ and ▼ keys together
SETUP
HOLD
SETUP
HOLD
6.3.2 Temperature sensor calibration (ATC mode only)
NOTE:
This parameter is blanked out when the controller is set for ATC off.
This mode lets you offset the controller to compensate for small inaccuracies in your temperature sensor. You can offset the temperature sensor up to ±5°C.
1.
Select “ATC on”
as described in
Section 6.3.1.
2.
Press the ENTER key.
The upper display shows the temperature offset.
The lower display shows the current measured temperature.
See bold figure at right
3.
Compare the current measured temperature on the controller display to a thermometer known to be accurate.
4.
Press the ▲ and ▼ keys to scroll the lower display to match the known temperature. The upper display shows the amount of offset. You can offset temperature up to ±5°C.
5.
Press the ENTER key
to confirm selection and return to advanced set up mode.
Return to Measurement mode by pressing the ▲ and ▼ keys (escape) simultaneously.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
6.3.3 Manual temperature compensation
Manual temperature compensation lets you ignore your temperature probe input or use a probe without a built-in temperature sensor. The controller will compensate for temperature at the values you enter.
For manual temperature compensation, you can set two different temperatures:
• process temperature
• calibration temperature
This allows calibration at a temperature other than your process temperature.
Example:
setting a calibration temperature of 25°C lets you calibrate using standard buffer solutions at 25°C, even if your process temperature is a different temperature.
You can set process and calibration temperatures between –9.9 to 125°C.
Default temperature is 25°C.
6.3.4 Setting process temperature
NOTE:
This parameter is blanked out when the controller is set for ATC on.
1.
Select “ATC off”
as described in
Section 6.3.1.
2.
Press the ENTER key.
The upper display shows the current process temperature and the lower display shows P.
O C (process temperature).
See bold figure at right
3.
Press the ▲ and ▼ keys to adjust the process temperature value. You can adjust the value from –9.9 to 125°C.
4.
Press the ENTER key
to confirm selection.
5.
Proceed to step 3 of section 6.3.5, or press the ▲ and ▼ keys together to return to measurement mode.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
6.3.5 Setting calibration temperature
NOTE:
This parameter is blanked out when the controller is set for ATC on.
From measurement mode:
1.
Select “ATC off”
as described in
Section 6.3.1.
2.
Press the ENTER key twice.
The upper display shows the current calibration temperature and the lower display shows C.
O
C
(calibration temperature).
See bold figure at right
3.
Press the ▲ and ▼ keys to adjust the calibration temperature value.
You can adjust the value from
–9.9 to 125°C.
4.
Press the ENTER key
to confirm selection and return to advanced set up mode.
Return to Measurement mode by pressing the ▲ and ▼ keys (escape) simultaneously.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
6.4
SP1 (SP2): Set up for Relay 1 (2) sub group
SP1 (SP2): Set up for relay SP1 (SP2) overview:
Relay set up 1 and relay set up 2 sub groups let you:
1
Select value for relay SP1
(SP2)
2
3
Select relay as low or high set point
Set hysteresis (dead band)
4
5
Set time delay for when relay switches on
Set time delay for when relay switches off
SETUP
HOLD
The SP1 option sets the operating parameters for relay 1; the SP2 option sets the operating parameters for relay 2. Since these two groups offer the same set-up parameters, they are described together.
HOLD
SETUP
1
SETUP
HOLD
2
3
SETUP
HOLD
SETUP
HOLD
4
5
SETUP
HOLD pH
6.4.1 Selecting the relay set point values
This lets you choose the pH (or ORP) value that will cause your controller to activate. If this value is crossed, the set point relay LED will turn from green to red.
HOLD
SETUP
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows SP1
(SP2).
3.
Press the ENTER key.
The upper display shows the current set point value and the lower display shows
SP1 (SP2).
See bold figure at right.
4.
Press the ▲ and ▼ keys to enter your value for Set Point 1 (Set Point
2). Your controller will activate at the value you select.
5.
Press the ENTER key
to confirm your selection.
6.
Proceed to step 3 of section 6.4.2, or press the ▲ and ▼ keys together to return to measurement mode.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD pH
6.4.2 Selecting relay as high or low set point
Select a low set point to activate controller when your value undershoots the set point; select a high set point to activate controller when your value overshoots the set point.
Using both SP1 and SP2, you can select lo/lo, lo/hi, hi/lo, or hi/hi set points.
SETUP
HOLD
HOLD
SETUP
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows SP1
(SP2).
3.
Press the ENTER key
until the upper display shows Lo or Hi (for low or high set point) and the lower display shows SP1 (SP2).
See bold figure at right.
4.
Press the ▲ and ▼ keys to toggle between low (lo) or high (hi) set point for SP1 (SP2).
5.
Press the ENTER key
to confirm your selection.
6.
Proceed to step 3 of section 6.4.3, or press the ▲ and ▼ keys together to return to measurement mode.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD pH
6.4.3 Selecting a hysteresis (dead band) value
Hysteresis prevents rapid contact switching if your value is fluctuating near the set point. It allows the set point value to overshoot by the specified hysteresis value. You can set the hysteresis value from:
• pH mode: 0.1 to 1.0 pH
• ORP mode: 10 to 100 mV
SETUP
HOLD
HOLD
SETUP
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows SP1
(SP2).
3.
Press the ENTER key
until the upper display shows the hysteresis
(dead band) value and the lower display shows HYS.
See bold figure at right.
4.
Press the ▲ and ▼ keys to enter your hysteresis value for SP 1 (SP 2).
Your controller will activate at the value you select.
5.
Press the ENTER key
to confirm your selection.
6.
Proceed to step 3 of section 6.4.4, or press the ▲ and ▼ keys together to return to measurement mode.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD pH
6.4.4 Setting an on-delay time lag
You can set a time delay for each relay, which stops the relay from switching on too soon. This helps prevent premature relay action and false alarms. This controller lets you set a 0 to 2000 second time delay before your relay activates.
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows SP1
(SP2).
3.
Press the ENTER key
until the upper display shows the “on delay” time and the lower display shows
On.d.
See bold figure at right.
4.
Press the ▲ and ▼ keys to enter on delay time for Set Point 1
(Set Point 2). Your controller will delay activation for the number of seconds (0 to 2000) you select.
5.
Press the ENTER key
to confirm your selection.
6.
Proceed to step 3 of section 6.4.5, or press the ▲ and ▼ keys together to return to measurement mode.
SETUP
HOLD
SETUP
HOLD
HOLD
SETUP
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD pH
6.4.5 Setting an off-delay time lag
You can set a time lag for each relay, which helps to prevent your relay from switching off too soon. This helps prevent premature relay action and false alarms. This controller lets you set a
0 to 2000 second time delay before your relay deactivates.
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows SP1
(SP2).
3.
Press the ENTER key
until the upper display shows “off delay” time and the lower display shows
OF.d.
See bold figure at right.
4.
Press the ▲ and ▼ keys to enter off delay time for Set Point 1
(Set Point 2). Your controller will delay activation for the number of seconds (0 to 2000) you select.
5.
Press the ENTER key
to confirm your selection and return to advanced set up mode.
Press the ▲ and ▼ keys together to return to measurement mode.
SETUP
HOLD
SETUP
HOLD
HOLD
SETUP
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD pH
6.5
ConF: Configuration sub group
ConF: Configuration subgroup overview
Configuration sub group lets you:
1
2
Select pH or ORP (mV) measurement units
Reset to default settings
SETUP
HOLD
1
SETUP
HOLD
2
SETUP
HOLD
6.5.1 Selecting pH or ORP measurement units
This parameter group lets you select pH or ORP readings, and input type symmetrical or asymmetrical. Use asymmetrical mode under normal operating conditions. Use symmetrical mode when the measuring environment is electrically noisy (i.e. in electroplating environments). Default setting is pH measurement in asymmetrical mode.
See Appendix 2 on page 45 for more details on operation in symmetrical and asymmetrical modes.
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows
ConF.
3.
Press the ENTER key
until the upper upper display shows the control type (pH or ORP) and the lower display shows symmetrical
(SY) or asymmetrical (ASY) input type.
See bold figure at right.
4.
Press the ▲ and ▼ keys to select the measurement units you require.
5.
Press the ENTER key
to confirm your selection.
6.
Proceed to step 3 of section 6.5.2, or press the ▲ and ▼ keys together to return to measurement mode.
Notes
When you switch the controller from pH to ORP readings, or vice versa, the other control parameters are reset to factory default.
IMPORTANT:
when using controller in symmetrical mode, be sure to connect solution ground (potential matching pin) to terminal 21. Failure to connect solution ground will result in unstable, erroneous readings.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
6.5.2 Reverting to default settings
Use this parameter to reset the controller to default settings. You have three options:
1. no dEF: No default retains all current settings.
2. CAL dEF: Calibration default clears all calibration data only.
3. FCt dEF: Factory default resets all settings (except the temperature mode and input mode settings) to factory default.
From measurement mode:
1.
Enter Advanced set-up mode.
Push the ENTER key.
2.
Press the ▲ and ▼ keys to scroll until the upper display shows
ConF.
3.
Press the ENTER key
until the upper display shows no and the lower shows dEF (default).
See bold figure at right.
4.
Press the ▲ and ▼ keys to choose your selection:
• no dEF: No default retains current settings
• CAL dEF: Calibration default clears all calibration settings
• FCt dEF: Factory default reverts to factory default settings
5.
Press the ENTER key
to confirm your selection and return to advanced set up mode.
SETUP
HOLD
SETUP
HOLD
SETUP
HOLD
Notes
See Appendix 1 on page 44 for a chart of all factory default settings.
6.6
CALIBRATION mode
The calibration procedure in Advanced Set-up mode is identical to the procedure in
Calibration mode. The only difference is that the controller will revert back to Set-Up
Mode (instead of Measurement mode) after calibration is complete.
To reach Calibration mode, perform one of the following:
•
From calibration mode.
From measurement mode, press the CAL key.
•
From advanced set up mode.
From measurement mode, press the ENTER key.
Press the ▲ and ▼ keys to scroll to set up mode “CAL PH”.
SETUP
HOLD
CAL mV pH
A
B
6.6.1 pH Calibration
This unit features seven preset buffer values (pH 1.00, 4.00, 6.86, 7.00, 9.00,
9.18 or 10.00) for fast auto-calibration at two points. When you calibrate this instrument, you need a standard pH buffer solution that matches one of these values.
NOTE:
You must calibrate at either pH 7.00 or pH 6.86 for the first calibration.
1.
Enter Calibration mode
. From measurement mode, press the
ENTER key. Press the ▲ and ▼ keys to scroll to set up mode “CAL PH”.
See figure
A
NOTE:
The upper and lower display should read CAL pH. If they read CAL
OrP, see section 6.5.1 on page 36 for directions on how to switch from ORP to pH readings.
2.
Press the ENTER key.
The upper display shows the slope in mV from the most recent calibration. The lower display will show the offset as the pH reading at 0 mV electrode output.
See figure
B
3.
Press the ENTER key again
to begin calibration. The “CAL” and buffer indicator appear on the display.
The upper display shows your present uncalibrated reading. The lower display indicates a preset pH buffer value.
4.
Press the ▲ and ▼ keys to scroll the lower display to the buffer value that matches your standard solution.
See figure
C
5.
Make sure the electrode is in your buffer solution
. In ATC mode, you must also immerse the temperature sensor in the buffer solution. In the symmetrically highresistance measurement mode, you must also immerse the potential equalization pin in the buffer.
6.
Press the ENTER key
to confirm the buffer value. The electrode indicator and
CAL indicator will both flash.
7.
Allow the electrode to stabilize.
You can press the ENTER key to enter the calibration value. If you do not press the
ENTER key, the controller will automatically enter the calibration value when the electrode reading is stable.
8.
Repeat steps 4 through 7 with a second buffer for the second calibration point.
See figure
D
9.
After calibrating to a second buffer value, this controller automatically displays slope in the upper display and offset in the lower display.
10.
Press the CAL key to return to the
Set-Up mode. Or, press ▲ and ▼
(escape) together to return to measurement mode.
HOLD
HOLD
CAL
CAL
Notes
If there is a calibration error, the controller flashes the buffer and electrode icons. If this happens, push both ▲ and ▼ (escape) to restart the calibration beginning from step 1.
When calibrating with manual temperature compensation, the controller automatically changes from the preset process temperature to the preset calibration temperature.
After leaving the Calibration mode, the controller switches back to the process temperature. To set the calibration temperature and the process temperature, see pages 27-28.
The slope and offset are re-determined after each calibration.
pH pH
D pH pH
C
SETUP
HOLD
HOLD
CAL mV
A
B
6.6.2 ORP Calibration
1.
Enter Calibration mode
. From measurement mode, press the
ENTER key. Press the ▲ and ▼ keys to scroll to set up mode “CAL ORP”.
See figure
A
NOTE:
If the upper and lower display read
CAL PH, see section 6.5.1 on page 36 for directions on how to switch from pH to
ORP mV readings.
2.
Place sensor in the calibration solution.
3.
Press the ENTER key
to begin calibration. The “CAL” indicator will appear on the display. The upper display shows the current mV output of the electrode without any offset adjustment.
See figure
B
4.
Determine the mV value of your solution with a meter known to be accurate.
5.
Press the ▲ and ▼ keys to offset the mV value on the controller display to match the value of the solution you are measuring.
6.
To confirm your selection and return to
Advanced Set Up mode, press the
ENTER key
again.
7. Specifications
Range
Resolution
Accuracy
pH
–2.00 to 16.00
0.01 pH
±0.01 pH
ORP (mV)
±1000 mV
1 mV
±1 mV
Temperature
–9.9 to 125.0°C
0.1°C
±0.5°C
Control type
Number of inputs
Relay delay
Input impedance
on/off one
Number of set points
Output
two: high and low
Control: 2 SPDT relays; 6A @ 110 VAC, 250 VAC max
Current: galvanic 4-20 mA, 600
Ω maximum load
Hysteresis (dead band)
0.1 to 1.0 pH or 10 to 100 mV
0 to 2000 seconds
106 M
Ω
Electrical isolation pH calibration
Temperature sensor
Display
Housing
Dimensions
Panel cut-out
yes, galvanically
2 points (pH 1.00, 4.00, 6.86, 7.00, 9.00, 9.18 or 10.00) via keypad. One point must be pH 6.86 or 7.00.
100
Ω or 1000
Ω
Platinum RTD, terminal strip dual-line LCD; 4-digit upper and 3 1 ⁄
2
-digit lower
IP54 front; 1 ⁄
4
DIN size
3 13 ⁄
16
"W x 3 13 ⁄
16
"H x 6 15 ⁄
16
"D (9.6 x 9.6 x 17.5 cm)
3 3 ⁄
8
"W x 3 3 ⁄
8
"H (9.2 x 9.2 cm)
Operating temperature
14 to 140°F (–10 to 60°C)
Weight
1.5 lbs (0.7 kg) unit only; 2.5 lbs (1.2 kg) boxed
8. Accessories
Extra controllers
WD-35108-00 800 series pH/ORP controller,
120 VAC
WD-35108-05
WD-35100-90
800 series pH/ORP controller,
220 VAC
Power cord; 3 ft with bare leads,
3 prong U.S. plug, 110 VAC
Semi-domed electrodes
These double-junction electrodes feature a unique surface design that provides protection from particulates while increasing flow across the junction to provide cleaning. Ceramic junction provides toughness along with steady electrolyte flow.
The graphite body probes act as a solution ground and take advantage of the controller’s symmetrical mode (see page 45 for more information).
Sealed
KCl/AgCl reference. Have 10-ft cable, BNC connector, and stripped ends for ATC element. Dimensions: 5.875"L
WD-35807-00
WD-35807-05
WD-35807-10
WD-35807-15
Semi-domed bulb electrode,
epoxy body, 3 ⁄
4
" NPT thread
Semi-domed bulb electrode,
epoxy body, 1" NPT thread
Semi-domed bulb electrode,
graphite body, 3 ⁄
4
" NPT thread
Semi-domed bulb electrode,
graphite body, 1" NPT thread
In-line/submersible electrodes
These permanently encapsulated combination electrodes have a CPVC body and 3 ⁄
4
"
NPT threads on both ends. Install in a tee fitting or on a submersion pipe for tank mounting. Sealed KCl/AgCl reference. Have 10-ft cable, BNC connector, and stripped ends for ATC element. Dimensions: 6.325"L x 1"OD
WD-35801-02
WD-35801-08
WD-35801-21
In-line/submersible pH electrode;
single junction
In-line/submersible pH electrode;
double junction
In-line/submersible ORP electrode;
double junction,
Pt band sensor
Submersible electrodes
These combination electrodes are permanently encapsulated in a 3-ft L x 1"OD ABS pipe—install in a tank. Sealed KCl/AgCl reference. Have 10-ft cable, BNC connector, and stripped ends for ATC element.
WD-35806-00
WD-35806-01
WD-35806-02
Submersible pH electrode;
single junction
Submersible pH electrode;
double junction
Submersible ORP electrode;
double junction, Pt band sensor
8. Accessories, continued
pH buffer solutions
These buffer solutions are standardized to ±0.01 pH at 25°C. They are labeled with pH vs. Temperature tables to adjust readings for accurate calibration. They are also labeled with the name and CAS number for all ingredients to conform to “Right-to-
Know” requirements, and are supplied with an MSDS (Material Safety Data Sheet).
Certified to NIST-traceable standards.
WD-00654-00
WD-00654-04
WD-00654-08 pH 4.01,
1 pint bottle
pH 7.00,
1 pint bottle
pH 10.00,
1 pint bottle
9. Appendix 1: Factory default settings
Type
OFS
Parameter pH offset
Value
0.00 pH
Remarks
Zero offset value
SET C ATC
Temp. offset
SP1 SP1
ATC = ON
0.0°C
4.00 pH
LO/HI trigger LO
Automatic Temperature Compensation*
Zero temperature offset* set point 1
LO trigger mode
SP2
Hysteresis 0.50 pH
On delay time 0 seconds
Off delay time 0 seconds
SP2 10.00 pH
—
—
— set point 2
ConF
CAL
LO/HI trigger HI
Hysteresis 0.50 pH
On delay time 0 seconds
Off delay time 0 seconds pH/ORP units pH/ASY
Factory default no
Calibration 59.2 mV
HI trigger mode
—
—
—
Asymmetrical pH mode*
Do not reset to factory default default setting assumes 0 mV offset at
7 pH with 59.2 mV slope
*These settings are in place when the controller is shipped to you. However, if you change these settings and then revert the controller to factory default settings, these settings will remain as you changed them (these settings do not revert to factory default). See page 37 for instructions on reverting to factory default settings.
10. Appendix 2: Symmetrical mode
Your controller can operate in asymmetrical or symmetrical mode. See Section 6.5.1
on page 36 for information on selecting the appropriate mode.
Asymmetrical mode
works well in environments with where there is little or no electrical noise. When there is electrical noise, the noise acts as a common signal and is picked up by both the pH and the reference electrodes. However, since the reference electrode is grounded to the ground potential of the amplifier, electrical noise will be present only on the pH electrode. This noise is amplified along with the pH signal, which causes reading fluctuations in an electrically noisy atmosphere.
Electrical noise from a DC source (as in an electroplating tank) will typically result in stable but incorrect values.
Symmetrical mode.
For noisy electrical environments, this controller offers
Symmetrical Mode operation. To take advantage of Symmetrical operation, you
must have an electrode with a solution ground (potential matching) pin.
If your electrode does not have a solution ground, be sure to set the controller to
Asymmetrical mode.
Symmetrical mode avoids grounding the reference electrode by reconfiguring the input to a floating differential mode (see diagram below right). The electrical noise appears equally on the pH and reference electrodes, and is therefore rejected by the operational amplifier.
Asymmetrical mode
Symmetrical mode
pH electrode wire pH electrode wire pH pH reference electrode wire
end view of electrode without built-in solution ground
18 19 20 21 22
Pt100/
Pt1000
0V/
PAL S/ solution ground wire reference electrode wire
end view of electrode with built-in solution ground
pH electrode bulb pH electrode bulb solution ground
11. Appendix 3: Jumper positions
Note that there is a fuse internal to the controller. Before opening the unit, ENSURE that the power cable is physically separated from the mains supply. Replace the fuse with the recommended part specified by the manufacturer.
Jumper Positions - Internal to the controller
JP 1 Selects the input voltage 220 VAC. To switch to 110 VAC, use tweezers or needle nose pliers to remove jumper from JP1 pins to JP2 pins.
JP 2
JP 3
Selects the input voltage 110 VAC. To switch to 220 VAC, use tweezers or needle nose pliers to remove jumper from JP2 pins to JP1 pins.
Selects between Pt100 and Pt1000. To switch between Pt 100 and Pt 1000, desolder jumper and resolder jumper in new position as indicated inside controller housing. If you are not equipped to do this, please contact your
OAKTON distributor for further information.
Rear
FUSE
JP2 JP1
View from the top
Pt100/Pt1000
JP3
Front
12. Index
A
Accessories ................................................42-43
Advanced Set up mode ............................18-40
Overview ................................................19-20
Assembly, controller....................................6-11
Asymmetrical mode ......................................45
ATC on or off, selection ................................25
B
Back panel..........................................................8
C
Calibration
Clearing previous calibration data ........37
ORP..............................................................18
pH............................................................16-17
Temperature ................................................26
Configuration subgroup ..........................35-37
Control diagram, sample setup ......................6
Controller wiring ..............................................9
Control relays ............................................29-34
Control type subgroup ............................29-34
D
Dead band........................................................32
Default settings
Default settings chart ................................44
Reverting to default settings ....................37
Dimensions ........................................................7
Display ............................................................13
E
Electrical connections ......................................9
Electrode
Setting offset value ....................................23
Wiring ..........................................................10
F
Factory default settings
Default settings chart ................................44
Reverting to default settings ....................37
H
High relay set point........................................31
HOLD function ..............................................11
Hysteresis ........................................................32
I
Installation, controller ................................6-11
Introduction ..................................................4-5
K
Keypad ............................................................12
L
LED indicators ................................................14
Low relay set point ........................................31
M
Manual temperature compensation ............27
Calibration temperature ............................28
Process temperature ..................................27
Measurement, pH (ORP) ..............................15
Measurement units (pH or ORP), setting ..37
O
Off-delay time lag ..........................................34
Offset sub group (OFS) ............................22-23
Offset
Electrode ......................................................23
Temperature ................................................26
On-delay time lag ..........................................33
ORP
ORP calibration ..........................................18
ORP units, selecting ..................................36
Overview of advanced set up mode............................................19-20
P
pH pH calibration ........................................16-17 pH units, selecting......................................37
Probe wiring ....................................................10
R
Recorder output, wiring ..................................9
Relay 1 & 2 subgroup ..............................29-34
Relays
Selecting set point values ......................30
Setting high or low set point ................31
Resetting controller to default settings ......37
Return of items................................................48
S
Specifications ..................................................41
Starting up ......................................................15
Symmetrical mode..........................................45
T
Temperature calibration ................................26
Temperature, manual or automatic ............27
Temperature offset..........................................26
Temperature settings (SET °C) ................24-28
U
Units, selecting pH or ORP ..........................36
W
Warranty ..........................................................48
Wiring............................................................9-11

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Key features
- Menu-driven program
- Large dual display
- Two set point, two SPDT relay operation
- Protection against electromagnetic interference
- Push button two-point calibration
- Easy, fast calibration
- LED indicators signal control
- Nonvolatile memory
- 4-20 mA transmitter/recorder output