OAKTON 1000 Series Dissolved Oxygen Controller Instruction Manual

OAKTON 1000 Series Dissolved Oxygen Controller

Product Information

Specifications

• Product Name: OAKTON 1000 Series 1/4 DIN Dissolved Oxygen Controller
• Warranty: One year from the date of purchase
• Operating Parameters: DO Calibration, Advanced Setup, Current Output
• Output Range: 4-20 mA or 0-20 mA

Product Usage Instructions

1. Introduction

The OAKTON 1000 Series 1/4 DIN Dissolved Oxygen Controller is a high-quality controller designed for measuring and controlling dissolved oxygen levels in various applications.

2. Starting Up

To start using the controller, follow these steps:

1. Ensure that the controller is connected to a power source.
2. Press the power button to turn on the controller.
3. The controller will display the current operating parameters.

2.1 Viewing Operating Parameters

To view the operating parameters, simply observe the display on the controller. The parameters will be shown clearly.

2.2 Entering DO Calibration Mode

If you need to calibrate the dissolved oxygen measurement, follow these steps:

1. Press the “CAL” button to enter calibration mode.
2. Follow the instructions provided in the “DO Calibration” section.

2.3 Entering Advanced Setup Mode

If you need to access advanced setup options, follow these steps:

1. Press the “SETUP” button to enter advanced setup mode.
2. Follow the instructions provided in the “Advanced Setup” section.

3. DO Calibration

3.1 Before DO Calibration

Before calibrating the dissolved oxygen measurement, ensure that you have a calibrated DO probe and the necessary calibration solutions.

3.2 One-point DO Calibration

To perform a one-point DO calibration, follow these steps:

1. Immerse the DO probe in a calibration solution with a known DO concentration.
2. Enter the known DO concentration using the keypad.
3. Press the “CAL” button to start the calibration process.
4. Follow the on-screen instructions to complete the calibration.

3.3 Two-point DO Calibration

To perform a two-point DO calibration, follow these steps:

1. Immerse the DO probe in a low calibration solution with a known DO concentration.
2. Enter the known DO concentration using the keypad.
3. Press the “CAL” button to start the calibration process.
4. Follow the on-screen instructions to complete the first calibration point.
5. Repeat the above steps for a high calibration solution with a known DO concentration.

FAQs

• Q: How long is the warranty period for the OAKTON 1000 Series Dissolved Oxygen Controller?
  • A: The warranty period for the OAKTON 1000 Series Dissolved Oxygen Controller is one year from the date of purchase.
• Q: How do I obtain authorization for returning items?
  • A: To obtain authorization for returning items, please contact our Customer Service Department and provide the reason for the return. Authorization must be obtained before returning any items.
• Q: Can I make improvements to the design and appearance of the product?
  • A: Yes, we reserve the right to make improvements in the design, construction, and appearance of our products without notice.

16. Warranty
OAKTON warrants this controller to be free from significant deviations in material and workmanship for a period of one year 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.

OPERATING INSTRUCTIONS

OAKTON 1000 series
1/4 DIN Dissolved Oxygen Controller

17. 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.

DO Controller
1000 Series

M EAS
mg/ l
C ATC

CAL

ENTER

ESC

REL A REL B
AUTO M ANU

ALARM RREELL AA REL B

XXXXX-XX

Printed in the U.S.A. 1/993

DO Controller
1000 Series

M EAS
mg/ l
C ATC

CAL

ENTER

ESC

REL A REL B
AUTO M ANU

ALARM RREELL AA REL B

Introduction

Thank you for purchasing an OAKTON 1000 series Dissolved Oxygen controller. This precise controller is ideal for controlling aquaculture or wastewater processes. Some of its more important features are: · Large dual display that shows DO plus temperature
–also displays mode indicators, set points, and status and error messages · Readout in mg/l, ppm or % saturation · Two set point, two SPDT relay operation
–choose from lo/lo, lo/hi, hi/lo, or hi/hi control · Three control modes are selectable
— on/off, proportional pulse length or proportional pulse frequency · Time delay adjustment on all relays
–select from 0 to 2000 seconds to minimize false alarms · Separate alarm relay
–alerts you to set points exceeded for a specific length of time or a failed temperature sensor
· Key in salinity and pressure manually –controller automatically calculates offset values
· Separately adjustable high and low set point hysteresis bands –prevent rapid contact switching if your value is fluctuating near the set point
· Push button one or two-point calibration · 0-20/4-20 mA transmitter/recorder output
–for remote monitoring and hard copy recording · Protected against electromagnetic interference · Two level password protection
–first level allows quick access to calibration; second level lets you change set-up parameters
· LED indicators signal control activities –monitor controller status from a distance
· Nonvolatile memory –maintains set-up even when power fails
Please read through this manual carefully before installing and operating your controller.

4

5

3.62″ (92 mm) 2.20″ (56 mm) 1.26″ (32 mm)
3.78″ (96 mm)

3.62 + 0.02″ (92+0.5 mm)

Assembly and Installation

2.1 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.
3.62 + 0.02″ (92+0.5 mm)
Mounting Cut-Out
Flat Gasket 0.4″ (1 mm) (To be Inserted By Customer)
Note: The Taped Corners Have to Be On Top

max. 6.89″ (175 mm)

max.1.77″ (45 mm)

6

2.2 Typical M easurement and Control System
A typical measurement system consists of:

· Power source
· the OAKTON 1000-series DO controller
· a Dissolved Oxygen probe with integrated or separate temperature sensor (Pt 100) and cable

· a final control element such as a pump or valve (up to two)
· a visual or audible alarm
· a recorder

DO Probe

110/220 VAC
6 A max

4-20 mA or 0-20 mA input signal chart recorder

DO Controller 1000 Series

M EAS mg/ l
C ATC

CAL

ENTER

ESC

REL A REL B
AUTO M ANU

ALARM RREELL AA REL B

Alarm or Indicator

Pump/Valve/Other Pump/Valve/Other

7

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.

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.

FUSE250VAC 63mA (F)

Pt100/

cell

Pt1000

18 19 20 21 22

+-

L N PE

RELAY1

RELAY2

ALARM

HOLD NC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

8

Po w er M ains

Relay 1

Relay 2

Alarm

Hold Input

Signal Output

1 2 3 4 56

7 8 9 10 11 12

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 jumper selection. Factory setting is indicated on the label on top of the controller.
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. Alarm relay resting position 11. Alarm relay common 12. Alarm relay working position 13. Hold function switch terminal 1 14. Hold function switch terminal 2 15. No connection 16. 0/4 – 20 mA for ­ current connection 17. 0/4 – 20 mA for + current connection
9

2.5 Probe connections
Pt 100

DO2­

DO2+

18
Red or brown

19

20

21

22

Red or Brown

Black

White

NOTE: If your DO probe has wires that are colored differently than the diagram shown above, follow the wiring instructions included with your DO probe instead.
18. Temperature 1 (Pt 100) 19. Place a jumper between terminal 18 and terminal 19. 20. Temperature 2 (Pt 100) 21. Anode (negative) 22. Cathode (positive)

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) Control the relays in the Manual mode. 4) Return to the Measurement mode when both keys are pressed at once.

Relay control key
Lets you: 1) Switch between Auto and Manual relay operation.

AUTO M ANU

Relay Selection key
Lets you:

1. Display set-point values for the relay contacts in Auto relay operation mode.
2. Switch between Relay 1 and Relay 2 in Manual relay operation mode.

REL A REL B

10

11

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 dissolved oxygen readings · The lower (secondary) display shows temperature readings

HOLD SETUP READY

ERR

ON OFF

MEAS CAL
ppmt mg/ l
%
C ATC

The LCD display area includes the following indicators: HOLD: HOLD indicator; relay position and current output are frozen SETUP: Advanced Set-up mode MEAS: Measurement mode CAL: Calibration mode READY: indicates value in primary display is steady ERR: error/alarm indicator ON: in set up mode, appears when selecting parameter OFF: in set up mode, appears when deselecting parameter ppm: for measurement of DO ppt: for salinity input mg/l: indicates dissolved oxygen in mg/l %: indicates % saturation of dissolved oxygen °C: temperature units ATC: indicates automatic temperature compensation

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.

RREELL AA

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 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 alarm delay time value. This indicator also will light if temperature sensor fails. The error indicator will also appear on the display.

ALARM

12

13

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 dissolved oxygen value · The lower display will show the temperature value Annunciators along the right side of the display will also indicate whether the controller is set for % saturation, mg/l or ppm measurement.
Security codes
To access calibration and set up functions, you need to enter a security code. This controller features two levels of security codes to protect the numerical values, calibration data and unit parameters from unintentional alteration. The two security codes are as follows: –DO calibration mode security code = 11. — Setup mode security code = 22. You cannot change calibration and set up parameters unless you first enter the security code. You can, however, view all parameters without knowing the security code. · Refer to Section 5 on page 18 for more information on the Calibration mode · Refer to Section 6 on page 23 for more information on the Advanced Set-up mode.
Security code notes If you are viewing the parameters only, the controller automatically reverts to Measurement mode if you do not press a button for 1 minute. If you are changing parameters, the controller automatically reverts to Measurement mode if you do not press a button for 15 minutes.

4.1 Viewing operating parameters
You can view operating parameters without entering the security code. However, you must enter the security code to change parameters.
Viewing relay set point values: 1. Press the Relay Selection (Rel A/Rel B) key. The upper display will show your
set-point value for Relay A; the lower display will show “SP1”. 2. After two seconds the upper display will show your set-point value for Relay B;
the lower display will show “SP2”. 3. After an additional two seconds the controller will return to Measurement mode.
Viewing DO calibration parameters: 1. Press the CAL key. The display will cue you to enter a security code (C.Cd). 2. Leave the security code at “000”. 3. Press the ENTER key. This lets you view (not change) calibration data. 4. Press the ENTER key again to return to measurement mode.
Viewing set up parameters: 1. Press the ENTER key. The display will cue you to enter a security code (S.Cd). 2. Leave the security code at “000”. 3. Press the ENTER key again. This lets you view (not change) sub groups. 4. Press the and keys to scroll through the groups. 5. Press the ENTER key to view a sub group you wish to see in more detail. 6. Press the ENTER key repeatedly to scroll through the parameters of the sub
group you selected. 7. Press the and keys when you return to the sub group head to select
another subgroup. 8. Repeat steps 4 to 7 as needed. 9. Press the and keys together (escape) at any time to return to
Measurement mode.

14

15

4.2 Entering DO Calibration mode

To change calibration data, follow these steps:

1. Press the CAL key. The upper display will show “000” and the lower display will show “C.Cd”.

See figure A

2. Press the key to scroll the upper dis-

play to Calibration security code “11”.

A

See figure B

3. Press the ENTER key. NOTE: Pressing ENTER at a security code other than “11” will cause the controller to revert to the Measurement mode.

4. Press ENTER again . This lets you

begin calibration.

B

Press the and keys simultaneously

(escape) to return to Measurement mode.

See pages 18-21 for DO calibration instructions.

Clearing the Calibration security code from the display
The Calibration security code automatically resets from “11′ to “000” after you return to Measurement mode, so you do not need to clear the security code from the display.
Notes When you enter the Calibration mode with code “11”, the unit will automatically enter into the HOLD mode until you program further instructions (HOLD annunciator appears in upper left corner of display). While on HOLD, the current output and relay positions are frozen.

4.3 Entering Advanced Set-up mode

1. Press the ENTER key. The upper display will show “000” and the lower display will show “S.Cd”.

See figure A

2. Press the key to scroll the upper

display to Set-up security code “22”.

A

See figure B

3. Press the ENTER key.

NOTE: Pressing ENTER at a value other than “22” will cause the controller to revert to the Measurement mode.

4. You are now in the Advanced set-up

mode.

B

Press the and keys simultaneously

(escape) to return to Measurement mode.

See pages 23-61 for Advanced Set Up mode instructions.

Clearing the Advanced Set-up security code from the display
After you have entered the security code and returned to Measurement mode, whenever you press the ENTER key the security code “22” will appear on the display. To conceal the security code, you must manually reset the code. To clear the Advanced Set-up security code from the display: 1. Press the ENTER key in the Measurement mode. 2. Press the and keys to set display to any security code except 11 or 22. 3. Press the ENTER. key.
Notes When you enter the Advanced Set-up mode with security code “22”, the unit will automatically enter into the HOLD mode until you program further instructions (HOLD annunciator appears in upper left corner of display). While on HOLD, the current output and relay positions are frozen.

16

17

DO calibration

5.1 Before DO calibration
Before beginning DO calibration, make sure to keep the probe in ambient temperature air for about 10 minutes, so the probe and ambient temperature are in equilibrium. Keep the probe out of direct light. The membrane must be dry and clean. You can perform one or two point DO calibration. One point DO calibration is at 100%; two point calibration is at 0% and 100%. One-point DO calibration should be sufficient for most mid range measurements (10% to 100% saturation). Calibrate DO at two points if you will be measuring solutions of less than 10% oxygen saturation.Two point calibration requires zero oxygen solution (available in the “Accessories” section on page 66).
NOTE: To calibrate your controller, you need to select % saturation units. If you are not in % saturation mode, perform the following steps:
Selecting % saturation units
From measurement mode: 1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to
security code “22”. Push the ENTER key again. 2. Press the and keys to scroll until the upper display shows ConF. 3. Press the ENTER key . The upper display shows Unit and the lower display
shows dO. 4. Press the and keys to toggle to %saturation units. 5. Press the ENTER key to confirm your selection. 6. Press the and keys together to return to measurement mode.
18

5.2 One-point DO calibration
You can reach the dissolved oxygen calibration mode in two ways:
1. From calibration mode. From measurement mode, press the CAL key. Enter Security code “11”. Press the ENTER key.
2. From advanced set up mode. From measurement mode, press the ENTER key. Enter Security code “22”. Press the ENTER key. Scroll to set up mode “CAL DO”. Press the ENTER key again.

One-point DO Calibration

Make sure you are reading % saturation units. See page 18 for directions.

From measurement mode:

1. Enter Calibration mode. Push the CAL key. Press the key to scroll to security
code “11”. Push the ENTER key twice.

2. Press the and keys to select one-point DO calibration. The upper display shows 1-Pt and the lower display shows CAL.

HOLD SETUP

See figure A

A

3. Press the ENTER or CAL key.

Calibration starts. The upper display

show the measured value and the lower

display shows 100.0. The CAL indicator

flashes in the upper right hand corner.

4. Place the probe in air. Wait for the

HOLD

CAL

reading to stabilize. The READY

READY

indicator appears in the upper left

%

hand corner.

See figure B

B

5. Press the ENTER or CAL key to confirm calibration.

6. The new slope and measured temperature appear on the display. Press ENTER again to return to Measurement mode.

Notes
If the value on the display is beyond ±30% of the theoretical value, the old calibration value is retained and CAL and ERR indicators display. Press the and keys simultaneously to return to Measurement mode.
19

5.3 Two-point DO calibration
To perform two-point calibration, you need zero oxygen solution. See the “Accessories” section on page 66.
You can reach the Calibration mode in two ways:
1. In calibration mode. From measurement mode, press the CAL key. Enter Security code “11”. Press the ENTER key.
2. In advanced set up mode. From measurement mode, press the ENTER key. Enter Security code “22”. Press the ENTER key. Scroll to set up mode “CAL DO”. Press the ENTER key again.

Two-point DO Calibration

Make sure you are reading % saturation units. See page 18 for directions.

From measurement mode:

1. Enter Calibration mode. Push the CAL key. Press the key to scroll to security
code “11”. Push the ENTER key twice.

2. Press the and keys to select two-point DO calibration. The upper display shows 2-Pt and the lower display shows CAL.

HOLD SETUP

See figure A

3. Place the probe in 0% oxygen

A

solution.

4. Press the ENTER or CAL key.

Zero % calibration starts. The upper

display shows the measured value and

the lower display shows 0.0. The CAL

indicator flashes in the upper right

hand corner.

HOLD

CAL

5. Wait for the reading to stabilize.

READY

%

The READY indicator appears in the

upper left hand corner.

See figure B

B

6. Press the ENTER or CAL key to confirm calibration. The controller automatically moves to 100% calibration.

7. Place the probe in air.

8. Wait for the reading to stabilize.

The READY indicator appears in

the upper left hand corner.

HOLD

CAL

See figure C

READY
%

9. Press the ENTER or CAL key to

confirm 100% calibration. C
10. The new slope and measured

temperature appear on the

display. Press ENTER again to

return to Measurement mode.

Notes
0% calibration: If during 0% calibration, the value on the display is beyond ±5% of the theoretical value, the old calibration value is retained and CAL and ERR indicators display. Press the and keys simultaneously to return to Measurement mode.
100% calibration: If during 100% calibration, the value on the display is beyond ±30% of the theoretical value, the old calibration value is retained and CAL and ERR indicators display. Press the and keys simultaneously to return to Measurement mode.

20

21

Advanced set up mode

The OAKTON 1000-series DO controller fea-

tures eight sub groups that organize all set-up

parameters. These parameters let you customize

SETUP

your controller for your exact process. The sub

HOLD

groups are:

1. Offset adjustment (OFS)

2. Temperature settings (SEt °C)

SETUP

3. Control Relay 1 configuration (SP1)

HOLD

4. Control Relay 2 configuration (SP2)

5. Control type (Cntr)
SETUP
6. Current output (rng)
HOLD
7. Controller configuration (ConF)

8. DO calibration (CAL do)

SETUP

To view set-up parameters without access HOLD
to change them: From measurement mode: · Push the ENTER key. · Leave the security code at “000”.
SETUP
· Push the ENTER key again.

HOLD
To change set-up parameters:

From measurement mode:

· Push the ENTER key.

· Press the key to scroll to security code “22”.

SETUP

· Push the ENTER key again.

HOLD

See pages 26-61 for detailed information on each

set up parameter.

SETUP

Notes
HOLD

To simplify operations, the controller will not

display set up parameters that are not relevant

to the set up of the controller. For example: If

you set the controller for On/Off control, it will

SETUP

not display pulse length settings. HOLD

22

23

6.1 Advanced set-up mode sub group overview

SETUP

OFS: Offset mode

· Set probe offset value

HOLD

· Enter salinity correction factor

· Select pressure units: Hg or Pa

· Enter barometric pressure

See pages 26-31 for complete offset mode set up instructions

SETUP HOLD
See pages 43-47 for complete controller type set up instructions

CNTR: Control type
·Select control type (on/off, pulse frequency, pulse length, or controller off)
On/off, pulse frequency, pulse length modes only: · Select break contact (de- energized) or
make contact (energized) relay type
Pulse frequency or pulse length modes only: · Set proportional band · Select relay period duration (or select
maximum frequency)

SETUP HOLD
See pages 32-36 for complete temperature settings set up instructions
SETUP HOLD
See pages 37-42 for complete Control Relay 1 set up instructions
SETUP HOLD
See pages 43-47 for complete Control Relay 2 set up instructions 24

SET °C: Temperature settings
· 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
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

SETUP HOLD
See pages 48-51 for complete current output set up instructions
SETUP HOLD
See pages 52-57 for complete controller configuration set up instructions
SETUP HOLD
See pages 58-61 for complete calibration set up instructions

rng: Current output
· Choose 0-20 or 4-20 mA output · Select DO value equivalent to 0 (4) mA · Select DO value equivalent to 20 mA
ConF: Controller configuration
· Select DO measurement units (mg/l, ppm, or %)
· Select alarm relay delay in seconds · Select steady or pulse alarm contact · Select DO probe type
(0 to 10 ppm or 0.5 to 40 ppm) · Reset to controller default settings
CAL do: DO Calibration
· Select 1 point or 2 point DO calibration If one-point DO calibration selected: · One point calibration at 100% saturation · View slope and temperature after calibration If two-point DO calibration selected: · Low point calibration at 0% saturation · High point calibration at 100% saturation · View slope and temperature after calibration
25

6.2 OFS: Offset sub group
OFS: Offset subgroup overview The Offset sub group lets you: 1 Set DO probe offset value 2 Enter salinity correction factor 3 Select pressure units: Hg or kPa 4 Enter barometric pressure
SETUP HOLD
mg/ l
1
HOLD SETUP pp t
2
HOLD SETUP
3
HOLD SETUP
4
26

OFS: Offset mode
This mode lets you change the DO probe offset without removing the probe from your control system. You can make adjustments of up to ±2 mg/l or ±10% absolute. The controller will add or subtract the value from the measured DO 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. Offset mode also lets you enter a salinity correction factor and the barometric pressure. To return to measurement mode at any time, press the and keys.
To determine DO offset value:
1. Pull a grab sample from your system. Record the controller’s DO reading at the time you take the sample.
2. Measure the DO of your grab sample using a calibrated DO meter. Record the correct DO value.
3. Subtract the correct DO value from the controller’s reading in step 1. This value is your offset.

27

6.2.1 Entering the DO offset value:
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows OFS.
3. Press the ENTER key. The lower display will show the current measured DO 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 in step 3 on page 27. As you adjust the offset value, the lower display will update to match the current reading plus the electrode offset.
5. Press the ENTER key to enter the offset value.
6. Proceed to step 3 of section 6.2.1, or 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 18 for DO calibration instructions.

HOLD SETUP
HOLD SETUP
HOLD SETUP HOLD SETUP HOLD SETUP

mg/ l
pp t

6.2.2 Salinity adjustment mode
Salinity correction mode lets you correct for the variations in oxygen solubility due to salt concentration in the sample. You can enter a correction from 0.0 to 50.0 ppt.
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows OFS.
3. Press the ENTER key until the upper display shows the salinity correction factor and the lower reads SAL
See bold figure at right.
4. Press the and keys to enter the correct salinity adjustment factor. The salinity adjustment factor range is 0.0 to 50.0 ppt.
5. Press the ENTER key to confirm the salinity correction factor.
6. Proceed to step 3 of section 6.2.3, or press the and keys together to return to measurement mode.

HOLD SETUP

HOLD SETUP

mg/ l

HOLD SETUP pp t

HOLD SETUP HOLD SETUP

28

29

6.2.3 Selecting pressure units
This mode lets you select either mm Hg or Pascal barometric pressure units.
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows OFS.
3. Press the ENTER key until the upper display shows either Hg or PA and the lower display shows bAr.
See bold figure at right.
4. Press the and keys to toggle between mm Hg and Pascal units.
5. Press the ENTER key to confirm the pressure units.
6. Proceed to step 3 of section 6.2.4, or press the and keys together to return to measurement mode.

HOLD SETUP

HOLD SETUP

mg/ l

HOLD SETUP pp t

HOLD SETUP

HOLD SETUP

6.2.4 Entering pressure value
Barometric pressure is vital to correct dissolved oxygen measurements. You need to enter the correct barometric pressure of the area you are measuring. The factory default setting of barometric pressure is 760 Hg.
See Appendix 3 on page 69 for a “Pressure vs Altitude” table.
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows OFS.
3. Press the ENTER key until the upper display shows the barometric pressure and the lower display shows either Hg or PA.
See bold figure at right.
4. Press the and keys to adjust the barometric pressure. The pressure adjustment range is 555 to 808 mm Hg (74 to 108 kPa).
5. Press the ENTER key to confirm selection and return to advanced set up mode.

HOLD SETUP

HOLD SETUP

mg/ l

HOLD SETUP pp t

HOLD SETUP

HOLD SETUP

30

31

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
HOLD SETUP

HOLD SETUP
1
HOLD SETUP
2

HOLD SETUP
1
HOLD SETUP
3
HOLD SETUP
4

This set up group has two different sub paths. The screens you see depend on if you select ATC on or off.
32

6.3.1 Selecting automatic or manual temperature compensation

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
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 6.3.3
· To return to Measurement mode: Press the and keys together

HOLD SETUP HOLD SETUP

33

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. Subtract the current measured temperature from the true temperature to find the required offset value.
4. Press the and keys to scroll upper display to match the required offset value. 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.

HOLD SETUP HOLD SETUP
HOLD SETUP

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. Note that the DO probes that OAKTON offers include a built-in temperature sensor.
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 0 and 50°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.OC (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.

HOLD SETUP HOLD SETUP
HOLD SETUP
HOLD SETUP

34

35

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.OC (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.

HOLD SETUP

HOLD SETUP HOLD SETUP HOLD SETUP

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 Select relay as low or high set point
These modes appear only if on/off control type is selected (select control type in Controller sub group–see page 44):
3 Set hysteresis (dead band)
4 Set time delay for when relay switches on
5 Set time delay for when relay switches off
Note that SP1 and SP2 sub groups offer the same set up parameters.

HOLD SETUP
HOLD SETUP mg/ l
1
HOLD SETUP
2
HOLD SETUP mg/ l
3
HOLD SETUP
4

HOLD SETUP
5

36

37

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.

6.4.1 Selecting the relay set point values

This lets you choose the DO value that will cause your controller to activate.
If this value is crossed, and the alarm relay is selected ON, the alarm will trigger. Additionally, the set point relay LED will turn from green to red.
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
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 the pressure units.
6. Proceed to step 3 of section 6.4.2, or press the and keys together to return to measurement mode.

HOLD SETUP
HOLD SETUP
HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP

mg/ l
mg/ l

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.

HOLD SETUP

HOLD SETUP

mg/ l

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.

HOLD SETUP

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).

HOLD SETUP

mg/ l

See bold figure at right.

HOLD SETUP

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.

HOLD SETUP

6. Proceed to step 3 of section 6.4.3, or press the and keys together to
return to measurement mode.

Notes
If controller is set for proportional control, you will return to Advanced Set up mode after pressing ENTER. See page 44 for information on changing your controller type.

38

39

6.4.3 Selecting a hysteresis (dead band) value

NOTE: this parameter appears only if on/off control type is selected.

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.

HOLD SETUP

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
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.

HOLD SETUP HOLD SETUP
HOLD SETUP
HOLD SETUP HOLD SETUP

mg/ l
mg/ l

6.4.4 Setting an on-delay time lag

NOTE: this parameter appears only if on/off control type is selected.

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. Press the key to scroll to security code “22”. Push the ENTER key again.
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.

HOLD SETUP

HOLD SETUP HOLD SETUP

mg/ l

HOLD SETUP

mg/ l

HOLD SETUP

HOLD SETUP

40

41

6.4.5 Setting an off-delay time lag
NOTE: this parameter appears only if on/off control type is selected.

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.

HOLD SETUP

HOLD SETUP

mg/ l

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
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.

HOLD SETUP

HOLD SETUP HOLD SETUP

mg/ l

HOLD SETUP

42

6.5 Cntr: Control type sub group
CNTR: Control type sub group overview 1 Select control type:
[on/off, proportional (pulse frequency or pulse length), or controller off] On/off, pulse frequency, and pulse length modes only: 2 Select break contact (de-energized) or make contact (energized) relay type Pulse frequency and pulse length modes only: 3 Set proportional band 4 Select relay period duration (or maximum frequency)
HOLD SETUP

HOLD SETUP
1
HOLD SETUP
2

HOLD SETUP
1
HOLD SETUP
2
HOLD SETUP
3
HOLD SETUP
4

HOLD SETUP
1
HOLD SETUP
2
HOLD SETUP
3
HOLD SETUP
4

HOLD SETUP
1
43

6.5.1 Select control type
This mode lets you choose one of four controller types:
–L.Ct On/off control: use with pumps or valves for fast response.
–PFC Pulse frequency proportional control: use for smooth operation of frequency-dependent pumps.
–PLC Pulse length proportional control: use for smooth, precise control of valves.
–oFF Controller off: use to operate controller as a monitor only or to keep relays from switching when changing set-up parameters.
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows Cntr.
3. Press the ENTER key until the upper display shows the current controller type and the lower display shows tyP.
4. Press the and keys to select your controller type.
See bold figures at right.
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.

HOLD SETUP
On/ off control
HOLD SETUP
Pulse frequency proportional control
HOLD SETUP
Pulse length proportional control
HOLD SETUP

Controller off

44

6.5.2 Choosing break/make contact relay type
NOTE: If the controller type “oFF” is set, this parameter is blanked out.
This mode lets you determine which relay state–de-energized (break contact) or energized (make contact)– will trigger the alarm state. Controller default is de-energized (break contact).

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows Cntr.
3. Press the ENTER key until the lower display shows rEL and the upper display shows the current relay selection (de-energized = dEEN or energized = EN).
See bold figures at right.
4. Press the and keys to choose de-energized (break contact) or energized (make contact) relays.
5. Press the ENTER key to confirm your selection.
6. Proceed to step 3 of section 6.5.3, or press the and keys together to return to measurement mode.

HOLD SETUP
De-energized relay
HOLD SETUP
Energized relay

45

6.5.3 Selecting proportional band
NOTE: If you set controller “oFF” or “L.Ct”, the parameter listed below is blanked out.
This lets you determine the proportional band. The proportional band is the deviation from your set point at which the relays pulse at their maximum frequency (or at which the pulse length is at its maximum length). You can select this range from 10 to 200% of full-scale.

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows Cntr.
3. Press the ENTER key until the upper display shows the proportional range (a number from 10 to 200%), and the lower display shows PrP.
See bold figure at right.
4. Press the and keys to choose the proportional band value.
5. Press the ENTER key to confirm your selection.
6. Proceed to step 3 of section 6.5.4, or press the and keys together to return to measurement mode.

HOLD SETUP
Proportional band

6.5.4 Selecting period duration / maximum frequency
NOTE: If you set controller type “oFF” or “L.Ct”, the parameter listed below is blanked out.
This mode lets you: · in pulse length (PLC) mode: set the period duration (seconds) · in pulse frequency (PFC) mode: set the maximum frequency (in 1/min)

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows Cntr.
3. Press the ENTER key until the lower display shows t.PL or F.PF
–In PLC (pulse length) mode: The lower display will show t.PL to indicate pulse length. The upper display will show your current pulse length. You can select any value from 0.5 to 20 seconds.
–In PFC (pulse frequency) mode: The lower display will show F.PF to indicate pulse frequency. The upper display will show your current maximum pulse rate. You can select any value from 60 to 120 pulses per minute.
See bold figures at right.
4. Press the and keys to choose the period duration or maximum frequency, depending on your mode.
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.

HOLD SETUP
maximum frequency (pulse frequency)
HOLD SETUP
Period duration (pulse length)

Notes
In pulse frequency mode, when the measured value exceeds the deviation from the set-point, the controller will pulse the relay at this rate.

46

47

6.6 rng: Current output sub group
rng: Current output subgroup overview
Current output sub group lets you: 1 Choose 0-20 or 4-20 mA output 2 Select DO value equivalent to 0 (4) mA 3 Select DO value equivalent to 20 mA
HOLD SETUP
HOLD SETUP
1
HOLD SETUP
2
HOLD SETUP
3

6.6.1 Choosing output range (4-20 or 0-20 mA)

This parameter lets you select an output range of 4-20 or 0-20 mA. If you select 4-20 mA, the minimum current supplied by terminal 17 and 16 of the 17-way terminal block corresponds to 4 mA. If you select 0-20 mA, the minimum current corresponds to 0.

HOLD SETUP

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows “rng”.
3. Press the ENTER key until the upper display shows the output type (0-20 or 4-20) and the lower display shows “out”.
See bold figures at right.
4. Press the and keys to select your output range: 0-20 or 4-20 mA.
5. Press the ENTER key to confirm your selection.
6. Proceed to step 3 of section 6.6.2, or press the and keys together to return to measurement mode.

HOLD SETUP
HOLD SETUP HOLD SETUP

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49

6.6.2 Selecting DO value at 0 (4) mA
This parameter lets you choose a DO value to be equivalent to 0 (4) mA. Select the lowest value of the DO range that you want a recorder or transmitter to detect.

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows “rng”.
3. Press the ENTER key until the upper display shows a DO value and the lower display shows “r.0” or “r.4”
See bold figures at right.
4. Press the and keys to select the DO value equivalent to 0 (4) mA.
5. Press the ENTER key to confirm your selection.
6. Proceed to step 3 of section 6.6.3, or press the and keys together to return to measurement mode.

HOLD SETUP HOLD SETUP
HOLD SETUP
HOLD SETUP

6.6.3 Selecting DO value at 20 mA
This parameter lets you choose a DO value to be equivalent to 20 mA. Select the highest value of the DO range that you want a recorder or transmitter to detect.
From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows “rng”.
3. Press the ENTER key until the upper display shows a DO value and the lower display shows “r.20”
See bold figures at right.
4. Press the and keys to select the DO value equivalent to 20 mA.
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.

HOLD SETUP HOLD SETUP HOLD SETUP
HOLD SETUP

50

51

6.7 ConF: Configuration sub group
ConF: Configuration subgroup overview
Configuration sub group lets you: 1 Select DO measurement units (mg/l, ppm, or %) 2 Select alarm delay in seconds 3 Select steady or pulse alarm contact 4 Select probe type (0 to 10 ppm or 0.5 to 40 ppm) 5 Reset to default settings
HOLD SETUP READY

52

HOLD SETUP

mg/ l

1

HOLD SETUP

2
HOLD SETUP
3
HOLD SETUP

4
HOLD SETUP
5

6.7.1 Selecting DO measurement units (mg/l, %, or ppm)

From measurement mode:

1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.

HOLD SETUP READY

2. Press the and keys to scroll

until the upper display shows ConF.

HOLD SETUP

3. Press the ENTER key until the

upper display shows Unit and the

mg/ l

lower display shows dO.

See bold figure at right.

4. Press the and keys to toggle between mg/l, %, and ppm units.

5. Press the ENTER key to confirm your selection.

HOLD SETUP

6. Proceed to step 3 of section 6.7.2, or press the and keys together to
return to measurement mode.

HOLD SETUP

HOLD SETUP

HOLD SETUP

53

6.7.2 Selecting the alarm time lag
This parameter group lets you select a period of time before the alarm relay activates when your set point has been overshot. You can select from 0 to 2000 seconds.

HOLD SETUP READY

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.

HOLD SETUP

mg/ l

HOLD SETUP

2. Press the and keys to scroll until the upper display shows ConF.

3. Press the ENTER key until the upper display shows a numerical value (in seconds) and the lower shows AL.d.

See bold figure at right.

HOLD SETUP

4. Press the and keys to select the length of the alarm delay (0 to 2000 seconds) you want.
5. Press the ENTER key to confirm your selection.

HOLD SETUP

6. Proceed to step 3 of section 6.7.3, or press the and keys together to
return to measurement mode.

HOLD SETUP

6.7.3 Selecting steady or pulse contact for the alarm relay
This parameter group lets you select whether the alarm contact will operate as a steady contact or a fleeting (single pulse) contact. Pulse contact closing time is 1 second.

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows ConF.
3. Press the ENTER key until the upper display shows StdY or FLEt and the lower shows AL.C. –AL.C = alarm contact –StdY = steady contact –FLEt = fleeting (single pulse) contact
See bold figure at right.
4. Press the and keys to select steady or pulse contact.
5. Press the ENTER key to confirm your selection.
6. Proceed to step 3 of section 6.7.4, or press the and keys together to return to measurement mode.

HOLD SETUP READY

HOLD SETUP HOLD SETUP

mg/ l

HOLD SETUP

HOLD SETUP

HOLD SETUP

54

55

6.7.4 Selecting DO sensor type
This parameter group lets you select the dissolved oxygen probe type: 0 to 10 ppm or 0.5 to 40 ppm.

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
2. Press the and keys to scroll until the upper display shows ConF.
3. Press the ENTER key until the upper display shows probe sensor type(range of 0-10 or 0-40) and the lower display shows EL.
See bold figure at right.
4. Press the and keys to select appropriate DO sensor type.
5. Press the ENTER key to confirm your selection.
6. Proceed to step 3 of section 6.7.5, or press the and keys together to return to measurement mode.
Notes
After each changeover, the factory calibration data for zero point and slope are overwritten. Be sure to recalibrate (see Section 5 beginning on page 18).

HOLD SETUP READY

HOLD SETUP HOLD SETUP

mg/ l

HOLD SETUP

HOLD SETUP

HOLD SETUP

6.7.5 Reverting to factory default settings
Use this parameter to reset all settings to factory default. Changing from “no” to “YES” and pressing the ENTER key resets all settings to factory default. See Appendix 1 on page 67 for a listing of default settings.
WARNING: If you select yes, all settings you have made are overwritten as a result!

From measurement mode:
1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to security code “22”. Push the ENTER key again.
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 select yes.
NOTE: Selecting “YES” and pressing the ENTER key will overwrite all settings you have made and automatically return you to Measurement mode.
5. Press the ENTER key to confirm your selection. The controller will automatically return to Measurement mode.

HOLD SETUP READY

HOLD SETUP HOLD SETUP

mg/ l

HOLD SETUP HOLD SETUP

HOLD SETUP

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57

6.8 CAL: Calibration sub group
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.
6.8.1 Before DO calibration
Before beginning DO calibration, make sure to keep the probe in ambient temperature air for about 10 minutes, so the probe and ambient temperature are in equilibrium. Keep the probe out of direct light. The membrane must be dry and clean. You can perform one or two point DO calibration. One point DO calibration is at 100%; two point calibration is at 0% and 100%. One-point DO calibration should be sufficient for most mid range measurements (10% to 100% saturation). Calibrate DO at two points if you will be measuring solutions of less than 10% oxygen saturation.Two point calibration requires zero oxygen solution (available in the “Accessories” section on page 66).
NOTE: To calibrate your controller, you need to select % saturation units. If you are not in % saturation mode, perform the following steps:
Selecting % saturation units
From measurement mode: 1. Enter Advanced set-up mode. Push the ENTER key. Press the key to scroll to
security code “22”. Push the ENTER key again. 2. Press the and keys to scroll until the upper display shows ConF. 3. Press the ENTER key . The upper display shows Unit and the lower display
shows dO. 4. Press the and keys to toggle to %saturation units. 5. Press the ENTER key to confirm your selection. 6. Press the and keys together to return to measurement mode.

6.8.2 One-point DO calibration
You can reach the dissolved oxygen calibration mode in two ways: 1. From calibration mode. From measurement mode, press the CAL key. Enter
Security code “11”. Press the ENTER key. 2. From advanced set up mode. From measurement mode, press the ENTER key.
Enter Security code “22”. Press the ENTER key. Scroll to set up mode “CAL DO”. Press the ENTER key again.

One-point DO Calibration

Make sure you are reading % saturation units. See page 58 for directions.

From measurement mode:

1. Enter Advanced set up mode. Press the ENTER key. Enter Security code “22”. Press the ENTER key. Scroll to set up mode “CAL DO”. Press ENTER key again.
2. Press the and keys to select one-point DO calibration. The upper display shows 1-Pt and the lower display shows CAL.
See figure A

HOLD SETUP
A

3. Press the ENTER or CAL key. Calibration

starts. The upper display show the mea-

sured value and the lower display shows

100.0. The CAL indicator flashes in the

upper right hand corner.

HOLD

CAL

4. Place the probe in air. Wait for the read-

READY

ing to stabilize. The READY indicator

%

appears in the upper left hand corner.

See figure B

B

5. Press the ENTER or CAL key to

confirm calibration.

6. The new slope and measured temperature appear on the display. Press ENTER again to return to Measurement mode.

Notes
If the value on the display is beyond ±30% of the theoretical value, the old calibration value is retained and CAL and ERR indicators display. Press the and keys simultaneously to return to Measurement mode.

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59

6.8.3 Two-point DO calibration
To perform two-point calibration, you need zero oxygen solution. See the “Accessories” section on page 66.
You can reach the Calibration mode in two ways: 1. In calibration mode. From measurement mode, press the CAL key. Enter Security
code “11”. Press the ENTER key. 2. In advanced set up mode. From measurement mode, press the ENTER key.
Enter Security code “22”. Press the ENTER key. Scroll to set up mode “CAL DO”. Press the ENTER key again.

Two-point DO Calibration

Make sure you are reading % saturation units. See page 58 for directions.

From measurement mode:

1. Enter Advanced set up mode. Press the ENTER key. Enter Security code “22”. Press the ENTER key. Scroll to set up mode “CAL DO”. Press ENTER key again.

2. Press the and keys to select two-point DO calibration. The upper display shows 2-Pt and the lower display shows CAL.

HOLD SETUP

See figure A

3. Place the probe in 0% oxygen

A

solution.

4. Press the ENTER or CAL key. Zero % calibration starts. The upper display shows the measured value and the lower display shows 0.0. The CAL indicator flashes in the upper right hand corner.

5. Wait for the reading to stabilize.

HOLD

CAL

The READY indicator appears in the

READY

upper left hand corner.

%

See figure B

6. Press the ENTER or CAL key to

B

confirm calibration. The controller

automatically moves to 100%

calibration.

7. Place the probe in air.

8. Wait for the reading to stabilize.

The READY indicator appears in

the upper left hand corner.

HOLD

CAL

See figure C

READY

%

9. Press the ENTER or CAL key to

confirm 100% calibration.

10. The new slope and measured

C

temperature appear on the

display. Press ENTER again to

return to Measurement mode.

Notes
0% calibration: If during 0% calibration, the value on the display is beyond ±5% of the theoretical value, the old calibration value is retained and CAL and ERR indicators display. Press the and keys simultaneously to return to Measurement mode.
100% calibration: If during 100% calibration, the value on the display is beyond ±30% of the theoretical value, the old calibration value is retained and CAL and ERR indicators display. Press the and keys simultaneously to return to Measurement mode.

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61

Alarm relay

This controller features a separate alarm relay. When the alarm is activated, the red alarm LED will light and the ERR indicator will appear on the controller display. The ATC and ERR indicators will blink if the error is due to temperature measurement. Additionally, you can hook a separate visual or audible alarm to this relay.
Delaying alarm relay action
Delay relay activation by 0 to 2000 seconds (factory default is 0 seconds). See section 6.7.2 on page 54 for information on how to set an alarm delay.

Po w er M ains

Relay 1

Relay 2

Alarm

Hold Input

Signal Output

1 2 3 4 56

7 8 9 10 11 12

13 14 15

mA
­+ 16 17

AC: L N PE

10. Alarm relay resting position 11. Alarm relay common 12. Alarm relay working position

8. Taking measurements
In normal measurement mode, the display will appear as shown in the figure at right. The readings will be in mg/l, % saturation, or ppm (depending on set up mode selection–see page 53).
If ATC is selected on, the ATC indicator should be lit. If manual temperature selection is chosen, the ATC annunciator will be off. When the controller is in ATC mode, and the Pt100 wire is broken or disconnected, an error message will be displayed, plus the alarm LED indicator and relay will be activated.
Since oxygen in your fluid is consumed by the galvanic type DO probe, it is important that your fluid is constantly flowing by the probe. See Appendix 2 on page 68 for more information on galvanic probes.

M EAS
mg/ l
C ATC

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Manual control mode

You can control devices connected to Relay A or Relay B from the front panel of this controller. Automatic mode is the mode that the controller normally enters when you switch it on. In Automatic mode, the controller’s set-point values actuate the relays.
In Manual mode, you have manual control of your relays so you can prime your pump or check pump status without operating the entire system.
To enter manual mode:
1. Press the Relay Control (auto/manu) key. The upper display will show “000”; the lower display will show “S.Cd” to prompt you to enter the Advanced Set-up Code.
2. Press the and keys to scroll the upper display until it reads “22”.
3. Press the ENTER key. The Manual indicator by the Relay Control key will light.
NOTE: Pressing ENTER at a value other than “22” will cause the controller to revert to the Measurement mode, and the relays will remain in automatic mode.
4. Press the Relay Selection key to select either Relay A or Relay B. The LED next to the currently selected relay (A or B) will light.
The manual control options now available will depend on the control type (on/off, pulse length, or pulse frequency) you selected set in Section 6.5.1 (see page 44).
–If you selected On/Off control: The upper display will read the current measured value. The lower display will show “oFF” or “on” depending on the relay status of the currently selected relay.
–If you selected Pulse Length control: The upper display will read the current measured value. The lower display will show the current pulse duration.
–If you selected Pulse Frequency control: The upper display will read the current measured value. The lower display will show the current pulse frequency.
5. Press the and keys to change the Relay on/off status, pulse length, or pulse frequency. The LED indicators at the right of the controller will also change between Red and Green to indicate Relay status.
NOTE: If you wish to manually change the status of both relays, press the RELAY SELECTION key at this point and repeat step 5 for the second relay. This first relay will remain under manual control while you are setting the second relay.
6. Press the RELAY CONTROL key to return to Measurement mode. The relays are now back under automatic control.

10. Specifications

Range Resolution Accuracy

mg/l (ppm) 0.0 to 20.00 mg/l (ppm)
0.01 mg/l (ppm) ±1.5% full scale

% saturation 0.00 to 200.0%
1% ±1.5% full scale

Temp. 0 to 50°C
0.1°C ±0.5°C

Control type: three (proportional pulse length or pulse frequency; on/off) Number of inputs: one Number of set points: two (high and low) Output
Control: 2 SPDT relays, 6 A @ 110 VAC, 250 VAC max Alarm: 1 SPDT relay, 6 A @ 110 VAC, 250 VAC max Pulse: pulse length (0.5 to 20 sec) or pulse frequency (60 to 120 pulses per min.) Current: isolated 0-20/4-20 mA, 600 max load, programmable boundaries Hysteresis: 0.1 to 1.0 mg/L; 1 to 10% Relay delay: selectable, 0 to 2000 seconds Input impedance: 1012 M Electrical isolation: yes, galvanically Pressure correction: manual input from 555 to 808 mm Hg; automatic correction Salinity correction: manual input from 0.0 to 50.0 ppt; automatic correction DO calibration: 1 or 2 points (100% and 0% saturation) Temperature sensor: 100 Platinum RTD, terminal strip Password protection: two level protection with four-digit password lockout; first level gives calibration access, second level allows set-up parameter changes Display: dual LCD; 4-digit upper and 31/2-digit lower Housing: IP54 front; 1/4 DIN size Dimensions: 313/16″W x 313/16″H x 615/16″D (9.6 x 9.6 x 17.5 cm) Panel cut- out: 33/8″W x 33/8″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

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11. Accessories
CONTROLLERS WD-35201-00 Dissolved oxygen controller, 110 VAC, 48-62 Hz WD-35201-05 Dissolved oxygen controller, 220 VAC, 48-62 Hz WD-35100-90 Power cord; 3 ft with bare leads, 3 prong U.S. plug, 110 VAC
PROBES and ACCESSORIES WD-35201-50 Industrial DO probe, 0 to 40 ppm WD-35640-71 Replacement electrolyte fluid, 500 ml WD-35640-70 Replacement electrolyte powder, 58.5 g. Mix your own electrolyte solution–makes 400 ml. Has longer shelf life in unmixed form WD-35640-74 Replacement membranes, 5/pack WD-35640-75 Replacement membranes, 25/pack WD-35640-79 Membrane installation tool. Required for membrane installation WD-00653-00 Zero % calibration solution

12. Appendix 1: Advanced set up mode default settings

Type OFS SET C SP1
SP2
Cntr rng ConF
CAL

Parameter

Value

DO offset

0.00 mg/l

Salinity offset 0.0

Pressure value 760 mm Hg

ATC

ATC = ON

Temp. offset 0.0°C

SP1

6.20 mg/l

LO/HI trigger LO

Hysteresis

0.5 mg/l

On delay time 0 seconds

Off delay time 0 seconds

SP2

4.00 mg/l

LO/HI trigger LO

Hysteresis

0.5 mg/l

On delay time 0 seconds

Off delay time 0 seconds

Control type LCt/tyP

Relay type

dEEn

mA output

4-20 mA

4 mA value

0

20 mA value 8.24 mg/l

DO units

mg/l

Alarm delay 0 seconds

Relay mode

StdY

Probe type

0-10 ppm

Factory default no

Calibration

100%

Remarks Zero offset value Zero salinity Barometric pressure at sea level Automatic Temperature Compensation Zero temperature offset set point 1 LO trigger mode — — — set point 2 LO trigger mode — — — On/off control Relay de- energized in no alarm condition — 4 mA corresponds to 0.00 mg/l 20 mA corresponds to 8.24 mg/l Controller displays in mg/l ALd = alarm delay = 0 seconds Relay activated mode: steady — Do not reset to factory default 100% saturation (8.24 mg/l)

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13. Appendix 2: Probe Theory
Dissolved oxygen levels in natural and waste waters depend on the physical, chemical, and biochemical activities in the water body.
The DO 1000 controller uses a galvanic probe. It consists of a cell that contains electrolyte and that is enclosed by a selective membrane, and two metallic electrodes. The membrane is practically impermeable to water and ionic dissolved matter, but is permeable to oxygen and a few other gases.
The cathode consumes the oxygen passed through the membrane, and produces an electric current in the probe. This current is proportional to the partial pressure of oxygen in the sample.
Since the cathode consumes the oxygen in the sample, it is essential that the fluid must flow past the sensor to maintain accurate readings.
The solubility of oxygen in water varies with barometric pressure and temperature, and decreases as salinity increases. For the most accurate DO readings, you need to compensate for these factors. The DO 1000 controller automatically compensates for temperature readings (unless you set it for manual temperature compensation; see section 6.3.1 on page 33). It also allows you to enter a salinity correction factor and the barometric pressure to correct for this variability (see sections 6.2.2-6.2.4 on pages 29-31).

14. Appendix 3: Pressure vs. Altitude table
Barometric pressure affects DO readings, therefore this DO controller lets you enter the correct barometric pressure at your altitude. If you do not have equipment that lets you measure the exact barometric pressure at your altitude, you can estimate it using the chart below.
If you change the barometric pressure setting from its factory setting (760 mm Hg), the % saturation calibration value in air will automatically adjust to a value other than 100% (see “corrected % saturation value” column below). The adjusted value is correct for the new barometric pressure setting.
See pages 30-31 for information on how to adjust the barometric pressure.
Pressure vs Altitude

Altitude (ft) 0 (Sea level)
500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000

Pressure (mm Hg) 760 746 732 720 707 694 681 668 656 644 632 621 609

Corrected % saturation value 100 98.1 96.3 94.7 93.0 91.3 89.6 87.8 86.2 84.6 83.0 81.6 80.0

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References

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