Hach Chlorine Sensor Användarmanual

DOC023.98.80088

Chlorine Sensor

02/2018, Edition 9

User Manual

Bedienungsanleitung

Manuale utente

Manuel de l’utilisateur

Manual del usuario

Manual do utilizador

Návod k použití

Brugervejledning

Gebruikershandleiding

Instrukcja obsługi

Bruksanvisning

Ръководство за потребителя

Felhasználói kézikönyv

Manual de utilizare

Руководство пользователя

Kullanıcı Kılavuzu

Návod na použitie

Navodila za uporabo

Korisnički priručnik

Εγχειρίδιο χρήσης

English...................................................................................................................................................................................................3

Deutsch...............................................................................................................................................................................................23

Italiano................................................................................................................................................................................................. 46

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Dansk.................................................................................................................................................................................................155

Nederlands...................................................................................................................................................................................... 176

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2

Table of contents

Specifications on page 3 Maintenance on page 16

General information on page 4 Troubleshooting on page 20

Installation on page 6 Replacement parts on page 22

Operation on page 10

Specifications

Specifications are subject to change without notice.

Specification Details

Measurement range 0 to 20 ppm

1

Lower limit of detection 30 ppb (0.030 ppm)

Resolution 0.001 ppm (1 ppb)

pH operating range 4 to 9 pH units

Accuracy

(chlorine concentrations

within ±2 ppm or 20%

(whichever is smaller) of the

calibrated point)

Free chlorine (0 to 10 ppm):

• ± 3% of the reference test

2

(DPD) at constant

pH less than 7.2 (±0.2 pH unit)

• ± 10% of the reference test

2

(DPD) at stable

pH less than 8.5 (±0.5 pH unit from the pH at

chlorine calibration)

Total chlorine (0 to 10 ppm):

• ± 10% of the reference test

2

(DPD) at stable

pH less than 8.5 (±0.5 pH unit from the pH at

chlorine calibration)

• ± 20% of the reference test

2

(DPD) at pH

greater than 8.5

Specification Details

Repeatability 30 ppb or 3%, whichever is greater

Response time Free chlorine: 140 seconds for 90% change (T

90

)

at a stable temperature and pH

Total chlorine: 100 seconds for 90% change (T

90

)

at a stable temperature and pH

Sampling time Continuous

Interferences Free chlorine: Monochloramine, chlorine dioxide,

ozone and chalk deposits

Total chlorine: Chlorine dioxide, ozone and chalk

deposits

Pressure limit 0.5 bar, no pressure impulses and/or vibrations

Flow rate 30 to 50 L/hour (7.9 to 13.2 gal/hour)

40 L/hour (10.5 gal/hour) – optimal

Power requirements 12 VDC, 30 mA maximum (supplied by controller)

Operating temperature 5 to 45 °C (41 to 113 °F)

Storage temperature Sensor: 0 to 50 °C (32 to 122 °F) dry without

electrolyte

Electrolyte: 15 to 25 °C (59 to 77 °F)

Dimensions

(length/diameter)

195 mm (7.68 in.)/25 mm (0.98 in.)

Cable length/type 1 m

Cable connection 5 pin, M12 connector

Measurement method Reagentless, electrochemical, amperometric,

three-electrode system

Calibration methods 1-point or 2-point (zero and slope) calibration

Temperature compensation Internal temperature sensor

1

The chlorine sensors are not applicable for applications with consistently low (< 0.1 ppm) or zero chlorine concentrations.

2

The test must be conducted at the analyzer sampling point.

English 3

Specification Details

Material Corrosion-resistant materials (stainless steel,

PVC, silicon rubber and polycarbonate)

Warranty 1 year warranty on the electrode body, includes

the electronics (EU: 2 years)

General information

In no event will the manufacturer be liable for direct, indirect, special,

incidental or consequential damages resulting from any defect or

omission in this manual. The manufacturer reserves the right to make

changes in this manual and the products it describes at any time, without

notice or obligation. Revised editions are found on the manufacturer’s

website.

Safety information

N O T I C E

The manufacturer is not responsible for any damages due to misapplication or

misuse of this product including, without limitation, direct, incidental and

consequential damages, and disclaims such damages to the full extent permitted

under applicable law. The user is solely responsible to identify critical application

risks and install appropriate mechanisms to protect processes during a possible

equipment malfunction.

Please read this entire manual before unpacking, setting up or operating

this equipment. Pay attention to all danger and caution statements.

Failure to do so could result in serious injury to the operator or damage

to the equipment.

Make sure that the protection provided by this equipment is not impaired.

Do not use or install this equipment in any manner other than that

specified in this manual.

Use of hazard information

D A N G E R

Indicates a potentially or imminently hazardous situation which, if not avoided, will

result in death or serious injury.

W A R N I N G

Indicates a potentially or imminently hazardous situation which, if not avoided,

could result in death or serious injury.

C A U T I O N

Indicates a potentially hazardous situation that may result in minor or moderate

injury.

N O T I C E

Indicates a situation which, if not avoided, may cause damage to the instrument.

Information that requires special emphasis.

Precautionary labels

Read all labels and tags attached to the instrument. Personal injury or

damage to the instrument could occur if not observed. A symbol on the

instrument is referenced in the manual with a precautionary statement.

This is the safety alert symbol. Obey all safety messages that follow

this symbol to avoid potential injury. If on the instrument, refer to the

instruction manual for operation or safety information.

This symbol indicates that a risk of electrical shock and/or

electrocution exists.

This symbol indicates the presence of devices sensitive to Electro-

static Discharge (ESD) and indicates that care must be taken to

prevent damage with the equipment.

Electrical equipment marked with this symbol may not be disposed of

in European domestic or public disposal systems. Return old or end-

of-life equipment to the manufacturer for disposal at no charge to the

user.

Product overview

The free chlorine sensor and total chlorine sensor are reagentless,

electrochemical sensors that continuously measure the chlorine

4

English

concentration in water. The free chlorine sensor measures the

concentration of free chlorine (generated from inorganic chlorine

products) in water. The total chlorine sensor measures the concentration

of total chlorine (free chlorine and combined chlorine) in water.

Variations in the pH value have an affect on the accuracy of the chlorine

measurement. The chlorine value shown on the controller usually

decreases at about 10% per pH unit increase.

This sensor has an internal temperature sensor that increases the

accuracy of chlorine measurement. The temperature measurement

signal is used internally by the sensor for automatic temperature

compensation. The temperature measurement signalis not shown on the

controller.

This sensor is designed to work with the digital gateway for the CLF10sc

and CLT10sc Reagentless Chlorine Analyzer and one of the sc series

controllers for data collection and operation.

Figure 1 shows the free chlorine sensor and total chlorine sensor.

Figure 1 Sensor overview

1 Electrode of the free chlorine

sensor

4 Vent hole in membrane cap

2 Membrane cap 5 Rubber band

3 Membrane 6 Electrode of the total chlorine

sensor

Sensor LEDs

The green LED and orange LED located inside the transparent area of

the chlorine sensor indicate the conditions of the power supply, sensor

signal polarity and electrochemical cell.

English

5

LED color Condition Description

Green On (steady) The processor is working correctly.

Off or On

(flashing)

The voltage is too low which has caused a

malfunction of the processor.

Orange Off The sensor is working correctly.

On (steady) The internal signal from the working electrode

has the wrong polarity.

If the LED is on for longer than 30 minutes, do

sensor maintenance.

On (flashing) The level of chlorine concentration is too high.

Reduce the chlorine concentration.

Theory of operation

This sensor is a potentiostatic three-electrode instrument, with a

specially placed counter electrode. The measuring (working) electrode is

membrane covered and is in the electrolyte together with the reference

electrode. This electrode area contains a special electrolyte and is

separated from the measured sample by the membrane.

The sensor uses an amperometric method to measure chlorine

concentration in water. Chlorine species in the measured sample pass

through the membrane and react with the working electrode. This

reaction produces an electrical current proportional to the chlorine

concentration. The electrical signal is amplified by the sensor electronics

and is transmitted to the instrument in voltage format (mV). The third

electrode (auxiliary or counter electrode) is put in the measured sample

and is used to maintain a constant working potential on the working

electrode. The working potential is controlled by the reference electrode.

This configuration increases measurement stability.

The highly-buffered electrolyte inside the membrane cap supplies

internal compensation for pH fluctuations in the measured sample. The

buffer helps to immediately change hypochlorite ions permeating the

membrane into hypochlorous acid molecules. The electrolyte makes the

measurement almost independent of the pH of the measured sample.

The chlorine readings are independent from the temperature of the

measured water due to internal temperature compensation.

Product components

Refer to Figure 2 to make sure that all components have been received.

If any of these items are missing or damaged, contact the manufacturer

or a sales representative immediately.

Figure 2 Sensor components

1 Chlorine sensor 4 Split ring

2 Special abrasive paper 5 Electrolyte

3 Split ring O-ring

Installation

C A U T I O N

Multiple hazards. Only qualified personnel must conduct the tasks

described in this section of the document.

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Sensor assembly

C A U T I O N

The electrolyte contains potassium halide and buffer to adjust acidity. Read the

MSDS sheet before opening the electrolyte bottle.

The sensor must be assembled before it can be installed in the chlorine

flow cell. Assembly consists of removing the membrane cap, filling the

membrane cap with electrolyte and putting the membrane cap on to the

electrode shaft.

Before assembling the sensor, read these precautions:

• Do not touch the electrodes and keep the electrodes clean. Do not

remove the layer on the electrodes.

• Lift up the rubber band that covers the vent hole marked “M48” on the

membrane cap before removing the membrane cap. The vent allows

air to come into the membrane cap. The membrane will be destroyed

if the vent is covered when the membrane cap is removed, because

vacuum will build up in the membrane cap.

• Do not remove the metallic membrane holder from the cap as this will

damage the membrane.

• Always put the membrane cap on a clean, non-absorbent surface.

• Do not shake the electrolyte bottle as shaking the bottle creates

bubbles. After the electrolyte bottle is opened, store the bottle up side

down.

• Make sure that there are as few bubbles in the electrolyte as possible

when filling the membrane cap with electrolyte. Too many bubbles will

decrease sensor performance.

• Do not close the vent hole marked "M48" in the membrane cap with

your finger when the membrane cap is put on to prevent excess

electrolyte from escaping through the vent. The membrane will be

damaged if the excess electrolyte can not escape. Gently clean off

any electrolyte on the outside of the sensor with a clean, dry cloth or

paper. Make sure not to touch the membrane.

• Make sure the membrane cap is completely put on up to the stop. The

first resistance comes from the O-ring seal, but continue to put on the

cap until the cap hits the electrode shaft.

Assemble the chlorine sensor

English 7

8 English

Install the sensor

The sensor must be installed in the flow cell, connected to the gateway,

conditioned and then calibrated before initial use and after maintenance

is done on the sensor. To install and connect the sensor, refer to the

illustrated steps.

To condition the sensor, operate the sensor for 6 to 12 hours until the

sensor readings stabilize. Refer to Diagnostic and test menu

on page 20 for information about viewing sensor readings.

Note: The controller and the sensor connected to it must remain in operation

continuously to maintain calibration.

English 9

Operation

Guidelines for operation

• This sensor is most reliable at residual chlorine concentrations more

than 0.1 ppm (mg/L). A build-up of sediments/contaminates (e.g.,

biological) on the membrane can interfere or prevent later chlorine

measurements.

• This sensor must not be operated in chlorine free water for more than

one day.

• This sensor must not be exposed to pressure impulses and/or

vibrations from the sample water.

User navigation

Refer to the controller documentation for keypad description and

navigation information.

Configure the sensor

Use the Configure menu to enter identification information and display

options for the sensor and to change options for data handling and

storage.

1. Push the MENU key and select Sensor Setup, Configure.

Option Description

EDIT NAME Changes the name that corresponds to the sensor on the

top of the measure screen. The name is limited to

10 characters in any combination of letters, numbers,

spaces or punctuation. The default name is the serial

number of the sensor.

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Option Description

SELECT

PARAM.

Customizes the options for sensor data handling and

storage. Refer to Select the parameters on page 11.

RESET

DEFAULTS

Sets the configuration menu to the default settings. All

sensor information is lost.

Select the parameters

1. Select the type of chlorine sensor used - Total CL2 or Free CL2.

2. Select whether a pH sensor is used - Yes or No.

3. If Yes, select the type of pH sensor used - DIFF PH (pHD) or

COMBO pH (pH combination) and then Chlorine.

4. Customize the sensor parameters:

Option Description

SELECT

UNITS

Sets the units for the sensor measurements-Auto ppb-ppm,

Auto ug/L-mg/L, Fixed ppm or Fixed mg/L.

DISPLAY

FORMAT

Sets the number of decimal places that are shown on the

measure screen-X.XXX, XX.XX (default), XXX.X or XXXX

(Auto).

SELECT

RANGE

Sets the measurement range-0 to 10 ppm.

CAL WATCH Shown if pH sensor is used-refer to Select the Cal Watch

alarm values on page 11.

FILTER Sets a time constant to increase signal stability. The time

constant calculates the average value during a specified

time-0 (filtering disabled) to 60 seconds (average of signal

value for 60 seconds). The filter increases the time for the

sensor signal to respond to changes in the process.

LOG SETUP Sets the time interval for event and data logging for

chlorine concentration and flow status-10, 30 seconds, 1,5,

15 (default), 60 minutes.

Select the Cal Watch alarm values

The Cal Watch menu is used to:

• Set the error and warning alarm conditions for chlorine and/or pH

measurement deviations.

• Set the amount of time a chlorine and/or pH measurement can be

outside the deviation range before an alarm occurs.

• Set the amount of time a chlorine measurement can be 0.5 ppm or

higher before an alarm occurs if the previous chlorine sensor

calibration was done using a process flow with a low chlorine

concentration (LCC) (< 0.5 ppm).

• Set the amount of time a Cal Watch alarm is on before it is canceled

by the instrument if measurements go back in to range.

• Set the percentage rate at which measurements must be outside the

deviation range before an alarm occurs and must be back in range

before an alarm is canceled by the instrument.

To select Cal Watch alarm values:

1. Select Cal Monitor.

2. If the passcode is enabled in the security menu for the controller,

enter the passcode.

3. Select the measurement(s) to monitor (choose one):

Option Description

ALL Enables an error or warning alarm to activate when chlorine

and/or pH measurement deviations occur that are equal to or

higher than the chlorine and pH deviation values selected by

the user.

CL2 ONLY Enables an error or warning alarm to activate when a chlorine

measurement deviation occurs that is equal to or higher than

the chlorine measurement deviation values selected by the

user.

pH ONLY Enables an error or warning alarm to activate when a pH

measurement deviation occurs that is equal to or higher than

the pH measurement deviation values selected by the user.

None Disables all Cal Watch alarms.

English 11

4. Push the ENTER key and select Activate TMR.

5. Set the amount of time a measurement(s) can be outside the

deviation range before an alarm occurs:

Option Description

ALL ACTIVATE TMR: Sets the amount of time the chlorine AND pH

measurements can be out of range before an alarm occurs-10 to

99 minutes (10 minutes default).

CONFID LEVEL: Set the percentage rate at which chlorine AND

pH measurements must be out of range before an alarm occurs

and must be in range before an alarm is automatically canceled

by the instrument-50 to 95% (default).

CL2/pH

ONLY

ACTIVATE TMR: Sets the amount of time the chlorine OR pH

measurements can be out of range before an alarm occurs-10 to

999 minutes (30 minutes default).

CONFID LEVEL: Set the percentage rate at which chlorine OR

pH measurements must be out of range before an alarm occurs

and must be in range before an alarm is automatically canceled

by the instrument-50 to 95% (default).

LCC ACTIVATE TMR: Set the amount of time a chlorine measurement

can be 0.5 ppm or higher before an alarm occurs-10 to

999 minutes (30 minutes default). An alarm only occurs if the

previous chlorine sensor calibration was done using a process

flow with a low chlorine concentration (LCC) (< 0.5 ppm).

CONFID LEVEL: Set the percentage rate at which chlorine

measurements must be 0.5 ppm or higher before an alarm

occurs and must be less than 0.5 ppm before an alarm is

automatically canceled by the instrument-50 to 95% (default).

6. Push the ENTER key and select Deactivate TMR.

7. Set the amount of time an alarm is on before it is automatically

canceled (deactivated) by the instrument if the measurements go

back in to range at the percentage rate (confidence level) selected in

Activate TMR:

Option Description

ALL Sets the amount of time a chlorine AND pH measurement

deviation alarm is on before it is canceled-10 to 99 minutes

(30 minutes default).

Option Description

CL2/pH

ONLY

Sets the amount of time a chlorine OR pH measurement

deviation alarm is on before it is canceled-10 to 999 minutes

(30 minutes default).

LCC Sets the amount of time an LCC alarm is on before it is

canceled-10 to 999 minutes (30 minutes default).

8. Push the ENTER key and select CL2 Deviation.

9. Set the chlorine measurement deviation values that activate alarms:

Option Description

CL2 ERR DEV Set the chlorine measurement deviation that will activate an

error alarm-30 to 99% (50% default).

CL2 WRN DEV Set the chlorine measurement deviation that will activate a

warning alarm-10 to 30% (20% default).

Note: Chlorine deviation is measured by the instrument using the chlorine

value recorded during the last process concentration calibration for chlorine.

10. Push the ENTER key and select pH Deviation.

11. Set the pH measurement deviation values that activate alarms:

Option Description

pH ERR DEV Set the pH measurement deviation that will activate an error

alarm-1 (default) to 3 pH units.

pH WRN DEV Set the pH measurement deviation that will activate a

warning alarm-0.5 (default) to 1 pH unit.

Note: pH deviation is measured by the instrument using the pH value recorded

during the last process concentration calibration for chlorine.

Calibrate the sensor

About sensor calibration

The sensor characteristics slowly shift over time and cause the sensor to

lose accuracy. The sensor must be calibrated regularly to maintain

accuracy. The calibration frequency varies with the application and is

best determined by experience.

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English

Recalibrate the sensor whenever disconnected from power and removed

from water for more than 15 minutes.

Choosing the calibration method

An initial 2-point calibration, including both zero

3

and slope

(process concentration) measurements, must be done for new or

refurbished sensors.

One or two measurements are required for sensor calibration.

Measurements are made with the chlorine sensor in the flow cell.

When only one measurement is made (1-point calibration), a zero

calibration or a process concentration measurement (grab sample

analysis) is done. A zero calibration can be done chemically by

measuring water with no chlorine or electrically by electronically

removing the calibration offset produced by the gateway

3

. A process

concentration measurement is done chemically by measuring the

chlorine concentration of the process flow with a reference method (grab

sample analysis) and then entering the measured value through the

controller.

When two measurements are made (2-point calibration), the first data

point measured is the zero-point and is determined by doing a zero

calibration either electrically or chemically using the same method as the

1-point calibration

3

. The second data point measured is the process

concentration and is determined by doing a process concentration

measurement (grab sample analysis) using the same method as the 1-

point calibration.

Note: When a chemical zero calibration is done, the instrument automatically does

an electrical zero calibration before the chemical zero calibration and shows both

offsets in the calibration results.

1-point calibration procedure

1. Push the MENU key and select Sensor Setup, Calibrate, Chlorine.

2. Select 1 Point Sample.

3. If the passcode is enabled in the security menu for the controller,

enter the passcode.

4. Select either Zero Cal (zero calibration) or Process Conc (process

concentration calibration).

5. Select the option for the output signal during calibration:

Option Description

ACTIVE The instrument sends the current measured output value

during the calibration procedure.

HOLD The sensor output value is held at the current measured value

during the calibration procedure.

TRANSFER A preset output value is sent during calibration. Refer to the

controller user manual to change the preset value.

6. If Process Conc was selected:

a. Push ENTER.

The measured value is shown.

b. Wait for the value to stabilize and push ENTER

4

to enter a

process flow measurement.

c. Measure the chlorine concentration of the process flow (grab

sample analysis) with an instrument using a reference method

(e.g., DPD). Use the arrow keys to enter the measured value and

push ENTER.

7. If Zero Cal was selected, select the type of calibration:

Option Description

ELECTRICAL The offset produced by the gateway is removed to set the

zero-point (no sample used).

CHEMICAL Water with no chlorine is measured to set the zero-point.

8. If Electrical was selected, wait for the value to stabilize and push

ENTER

4

to set the zero-point electrically.

3

An electrical zero calibration is recommended. A chemical zero calibration is only recommended if the process flow chlorine concentrations is

routinely lower than 0.5 ppm.

4

If the option for Auto Stab (auto stabilization) is set to Yes in the Calibration Options menu, the screen will advance to the next step automatically.

Refer to Change the calibration options on page 15.

English 13

9. If Chemical was selected:

a. Turn off the process flow and put water with no chlorine through

the flow cell. Make sure the temperature of the water with no

chlorine is as close as possible to the process sample flow

temperature.

b. Push ENTER.

The measured value is shown.

c. Wait for the value to stabilize and push ENTER

4

to set the zero-

point chemically.

10. Review the calibration result:

• Passed—the sensor is calibrated and ready to measure samples.

The slope and/or offset values are shown.

• Failed—the calibration slope or offset is outside of accepted limits.

Do sensor maintenance (refer to Maintenance on page 16) and

then repeat the calibration.

11. If the calibration passed, push ENTER to continue.

12. If the option for operator ID is set to Yes in the Calibration Options

menu, enter an operator ID. Refer to Change the calibration options

on page 15.

13. On the New Sensor screen, select whether the sensor is new:

Option Description

YES The sensor was not calibrated previously with this instrument. The

days of operation and previous calibration curves for the sensor are

reset.

NO The sensor was calibrated previously with this instrument.

14. Return the sensor to the process and push ENTER.

The output signal returns to the active state and the measured

sample value is shown on the measure screen.

Note: If the output mode is set to hold or transfer, select the delay time when

the outputs return to the active state.

2-point calibration procedure

1. Push the MENU key and select Sensor Setup, Calibrate, Chlorine.

2. Select 2 Point Sample.

3. If the passcode is enabled in the security menu for the controller,

enter the passcode.

4. Select the option for the output signal during calibration:

Option Description

ACTIVE The instrument sends the current measured output value

during the calibration procedure.

HOLD The sensor output value is held at the current measured value

during the calibration procedure.

TRANSFER A preset output value is sent during calibration. Refer to the

controller user manual to change the preset value.

5. Select the type of calibration:

Option Description

ELECTRICAL The offset produced by the gateway is removed to set the

zero-point (no sample used). Then a process sample is

measured to set the second point from which the slope is

calculated.

CHEMICAL Water with no chlorine is measured to set the zero-point.

Then a process sample is measured to set the second point

from which the slope is calculated.

6. If Electrical was selected:

a. Wait for the value to stabilize and push ENTER

5

to set the zero-

point electrically.

b. Push ENTER to continue the calibration.

The measured value of the process concentration is shown.

c. Wait for the value to stabilize and push ENTER

5

to enter a

process flow measurement.

5

If the option for Auto Stab (auto stabilization) is set to Yes in the Calibration Options menu, the screen will advance to the next step automatically.

Refer to Change the calibration options on page 15.

14 English

7. If Chemical was selected:

a. Turn off the process flow and put water with no chlorine through

the flow cell. Make sure the temperature of the water with no

chlorine is as close as possible to the process sample flow

temperature.

b. Push ENTER.

The measured value is shown.

c. Wait for the value to stabilize and push ENTER

5

to set the zero-

point chemically.

d. Turn off the flow of water with no chlorine and turn on the process

flow.

e. Push ENTER.

The measured value is shown.

f. Wait for the value to stabilize and push ENTER

5

to enter a

process flow measurement.

8. Measure the chlorine concentration of the process flow (grab sample

analysis) with an instrument using a reference method (e.g., DPD).

Use the arrow keys to enter the measured value and push ENTER.

9. Review the calibration result:

• Passed—the sensor is calibrated and ready to measure samples.

The slope and/or offset values are shown.

• Failed—the calibration slope or offset is outside of accepted limits.

Do sensor maintenance (refer to Maintenance on page 16) and

then repeat the calibration.

10. If the calibration passed, push ENTER to continue.

11. If the option for operator ID is set to Yes in the Calibration Options

menu, enter an operator ID. Refer to Change the calibration options

on page 15.

12. On the New Sensor screen, select whether the sensor is new:

Option Description

YES The sensor was not calibrated previously with this instrument. The

days of operation and previous calibration curves for the sensor are

reset.

NO The sensor was calibrated previously with this instrument.

13. Return the sensor to the process and push ENTER.

The output signal returns to the active state and the measured

sample value is shown on the measure screen.

Note: If the output mode is set to hold or transfer, select the delay time when

the outputs return to the active state.

Reset calibration to defaults

To remove a bad calibration, replace the user calibration settings with

the default calibration settings using the Calibrate menu. Then

recalibrate the sensor when needed.

1. Push the MENU key and select Sensor Setup, Calibrate, [Select

Sensor], Reset Defaults.

2. If the passcode is enabled in the security menu for the controller,

enter the passcode.

3. Select Yes and push Enter.

Change the calibration options

The user can set a calibration reminder, enable auto stabilization during

calibrations or include an operator ID with calibration data from the Cal

Options menu.

1. Push the MENU key and select Sensor Setup, Calibrate, [Select

Sensor], Cal Options.

2. Customize the options:

Option Description

AUTO STAB Enables the system to accept measurement signal values

during calibrations and advance to the next step of the

calibration when the system determines the measurement

signal has stabilized-On or Off (default). Enter a

stabilization range-25 to 75 ppb (0.025 to 0.075 ppm).

CAL REMINDER Sets a reminder for the next calibration in days, months or

years.

OP ID ON CAL Includes an operator ID with calibration data—Yes or No

(default). The ID is entered during the calibration.

English 15

Data log

The controller provides one data log for each sensor. The data log stores

the measurement data at selected intervals (user configurable). The data

log can be read out in a CSV format. For instructions on downloading the

logs, please refer to the controller user manual.

Refer to Select the parameters on page 11 for information about setting

time intervals for data storage in the data log.

Modbus registers

A list of Modbus registers is available for network communication. Refer

to the manufacturer's website for more information.

Maintenance

W A R N I N G

Multiple hazards. Do not disassemble the instrument for maintenance.

If the internal components must be cleaned or repaired, contact the

manufacturer.

C A U T I O N

Multiple hazards. Only qualified personnel must conduct the tasks

described in this section of the document.

Maintenance schedule

Maintenance task Frequency

Polish the electrode When sensor readings are unstable or

the slope is too low

Replace the membrane cap

6

1 year

(The cap may need to be replaced

more often depending on water

quality.)

Maintenance task Frequency

Replace the electrolyte 3 to 6 months

Replace the sensor 3 years

(The sensor may need to be replaced

more often depending on water quality

and application.)

Remove the sensor from the flow cell

Note: The sensor can be removed from water for up to 1 hour to do maintenance

on the sensor. The membrane cap and electrolyte will need to be replaced after

1 hour.

6

The electrolyte is replaced when the membrane cap is replaced.

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English 17

Polish the electrode tip

Polish the flat tip of the electrode with the special abrasive paper

provided.

Note: If calibration is impossible due to unstable sensor readings or too low

calibration slope, replace the electrolyte and membrane cap. Only polish the

electrode tip if replacing the electrolyte and membrane cap do not correct the

problem.

1. Disconnect the cable from the sensor.

2. Remove the sensor from the flow cell.

3. Read the precautions in Sensor assembly on page 7.

4. Lift up the rubber band that covers the vent hole marked “M48” on

the membrane cap and slide the rubber band over so it does not

cover the vent hole.

5. Turn the membrane cap counter-clockwise and remove the

membrane cap from the sensor.

6. Clean the electrode with a clean, dry paper towel.

7. Polish the dry electrode tip (Figure 3). Hold one corner of the special

abrasive paper while doing procedure.

Note: No additional force should be applied downward other than the sensor

weight.

8. Assemble the sensor with the old membrane cap.

9. Install the sensor in the flow cell and connect the sensor cable.

10. Condition the sensor by operating it for 6 to 12 hours. The sensor is

conditioned when the sensor readings stabilize. Refer to Diagnostic

and test menu on page 20 for information about viewing sensor

readings.

11. Calibrate the sensor.

Figure 3 Polish the electrode with the special abrasive

paper

1 Dry, clean paper towel 3 Special abrasive paper

2 Free chlorine sensor 4 Total chlorine sensor

Replace the membrane cap

1. Disconnect the cable from the sensor.

2. Remove the sensor from the flow cell.

3. Read the precautions in Sensor assembly on page 7.

4. Turn the membrane cap counter-clockwise and remove the

membrane cap from the sensor.

5. Dispose of the old membrane cap.

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English

6. Assemble the sensor with a new membrane cap.

7. Install the sensor in the flow cell and connect the sensor cable.

8. Condition the sensor by operating it for 6 to 12 hours. The sensor is

conditioned when the sensor readings stabilize. Refer to Diagnostic

and test menu on page 20 for information about viewing sensor

readings.

9. Calibrate the sensor.

Replace the electrolyte

1. Disconnect the cable from the sensor.

2. Remove the sensor from the flow cell.

3. Read the precautions in Sensor assembly on page 7.

4. Lift up the rubber band that covers the vent hole marked “M48” on

the membrane cap and slide the rubber band over so it does not

cover the vent hole.

5. Turn the membrane cap counter-clockwise and remove the

membrane cap from the sensor.

6. Hold the membrane cap with the electrolyte on the bottom and shake

up and down 1-2 times to remove old electrolyte.

7. Assemble the sensor with the membrane cap.

8. Install the sensor in the flow cell and connect the sensor cable.

9. Condition the sensor by operating it until the sensor readings

stabilize. Refer to Diagnostic and test menu on page 20 for

information about viewing sensor readings.

10. Calibrate the sensor.

Prepare the sensor for storage

C A U T I O N

The electrolyte contains potassium halide and buffer to adjust acidity. Read the

MSDS sheet before opening the electrolyte bottle.

The sensor can be stored for up to 3 years from the date of manufacture

when prepared as described. Refer to Specifications on page 3 for

storage specifications.

Note: Do not touch the electrodes and keep the electrodes clean. Do not remove

the layer on the electrodes.

1. Turn the membrane cap counter-clockwise and remove the

membrane cap from the sensor.

2. Rinse the membrane cap and electrode in clean water.

3. Dry the membrane cap and electrode with a clean, dry paper towel in

a place free of dust.

4. Loosely put the membrane cap on to the electrode shaft to protect

the electrode. The membrane must not rest against the measuring

electrode.

Remove the sensor from storage

Pre-requisite: Obtain a new membrane cap. The old membrane cap

cannot be used again.

1. Read the precautions in Sensor assembly on page 7.

2. Turn the membrane cap counter-clockwise and remove the

membrane cap from the sensor.

3. Dispose of the old membrane cap.

4. Polish the electrode tip with the special abrasive paper.

5. Assemble the sensor with a new membrane cap.

6. Install the sensor in the flow cell and connect the sensor cable.

7. Condition the sensor by operating it for 6 to 12 hours. The sensor is

conditioned when the sensor readings stabilize. Refer to Diagnostic

and test menu on page 20 for information about viewing sensor

readings.

8. Calibrate the sensor.

English

19

Troubleshooting

Diagnostic and test menu

The diagnostic and test menu shows current and historical information

about the chlorine analyzer. Refer to Table 1. To access the diagnostic

and test menu, push the MENU key and select Sensor Setup, Diag/Test.

Table 1 DIAG/TEST menu

Option Description

GATEWAY INFO Shows the firmware version, driver version, serial number

and boot version for the controller and the types of

sensors connected to the controller.

CAL DAYS Shows the number of days since the sensor was last

calibrated.

CAL HISTORY Shows a list of the times when the sensor was calibrated.

Push ENTER to scroll through the entries and view a

summary of the calibration data.

RST CAL HISTORY Resets the sensor calibration history. Requires passcode.

SIGNALS Shows the sensor measurement signal value in mV.

SENSOR DAYS Shows the number of days the sensor has been in

operation.

RST SENSORS Resets the sensor days and calibration days to default.

Requires passcode.

CALIBRATION Shows the slope and offset values for chlorine and pH (if

pH sensor is used). Shows the offset value for the

temperature (if pH sensor is used).

Error list

Errors may occur for various reasons. The sensor reading on the

measurement screen flashes. All outputs are held when specified in the

controller menu. To show the sensor errors, push the MENU key and

select Sensor Diag, Error List. A list of possible errors is shown below.

Table 2 Error list for the sensor

Error Description Resolution

CL CAL

REQD

A chlorine calibration and/or pH

calibration is required.

The chlorine and/or pH

measurement has changed

enough to cause a Cal Watch

alarm to occur. Refer to the

chlorine sensor manual for

more information.

Calibrate the chlorine sensor

and/or pH sensor.

CL MAINT

REQD

Chlorine sensor maintenance is

required.

The slope is less than 30% or

more than 300% of the default.

The default slope is

100 mV/ppm (100%).

Do sensor maintenance and then

repeat the calibration, or replace

the sensor. Refer to the chlorine

sensor manual for more

information.

CL MAINT

REQD

Chlorine sensor maintenance is

required.

The offset is too high (more

than ±50 mV).

Do sensor maintenance and then

repeat the calibration, or replace

the sensor. Refer to the chlorine

sensor manual for more

information.

CONC

TOO LOW

The chlorine signal is > 0 mV.

The potential delivered by the

sensor is outside of the range

0 to -2500 mV.

A connection error occurred or

the chlorine sensor is not

polarized/equilibrated in the

sample sufficiently.

CONC

TOO HIGH

The chlorine signal is less than

-2500 mV or greater than

2500 mV (by absolute value).

Warning list

A warning does not affect the operation of menus, relays and outputs. A

warning icon flashes and a message is shown on the bottom of the

measurement screen. To show the sensor warnings, push the MENU

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English

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