Hach CLF10sc Användarmanual

DOC023.98.80087

CLF10sc and CLT10sc Reagentless

Chlorine Analyzer

08/2020, Edition 5

User Manual

Benutzerhandbuch

Manuale utente

Manuel d'utilisation

Manual de usuario

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Návod k použití

Brugervejledning

Gebruikershandleiding

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Bruksanvisning

Ръководство за потребителя

Felhasználói kézikönyv

Manual de utilizare

Руководство пользователя

Kullanıcı Kılavuzu

Návod na použitie

Navodila za uporabo

Korisnički priručnik

Εγχειρίδιο χρήστη

Table of Contents

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

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

Italiano............................................................................................................................ 44

Français......................................................................................................................... 65

Español.......................................................................................................................... 86

Português.................................................................................................................... 106

Čeština......................................................................................................................... 126

Dansk............................................................................................................................147

Nederlands................................................................................................................. 168

Polski............................................................................................................................ 188

Svenska....................................................................................................................... 208

български................................................................................................................... 228

Magyar......................................................................................................................... 249

Română....................................................................................................................... 270

Русский........................................................................................................................290

Türkçe...........................................................................................................................311

Slovenský jazyk......................................................................................................... 332

Slovenski..................................................................................................................... 352

Hrvatski........................................................................................................................ 372

Ελληνικά...................................................................................................................... 392

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Table of Contents

1 Table of contents on page 3

2 Specifications on page 3

3 General information on page 3

4 Installation on page 9

5 Operation on page 12

6 Maintenance on page 13

7 Troubleshooting on page 17

8 Replacement parts and accessories

on page 20

Section 1 Table of contents

Specifications on page 3 Maintenance on page 13

General information on page 3 Troubleshooting on page 17

Installation on page 9 Replacement parts and accessories on page 20

Operation on page 12

Section 2 Specifications

Specifications are subject to change without notice.

Specification Detail

Component description Amperometric reagentless chlorine monitoring

analyzer panel, with chlorine, flow, optional pH

combination or pHD sensor, flow cells, sc

controller and digital gateway

Operating temperature 0 to 45 °C (0 to 113 °F)

Storage temperature (panel only) –20 to 60 °C (–4 to 149 °F)

Power requirements 12 VDC ± 10%, 100 mA maximum (supplied by

sc controller)

Panel dimensions (L x W x D) 48.3 x 49.5 x 15.1 cm (19 x 19.5 x 5.95 in.) with

panel-mounted components

Weight Approximately 5.4 kg (12 lb) (panel and empty

panel-mounted components only)

Flow rate Range: 30–50 L/hour (7.9–13.2 gal/hour)

Optimal: 40 L/hour (10.5 gal/hour)

Controller platform sc controller models

Section 3 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.

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3

3.1 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.

3.2 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.

3.3 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 symbol, if noted on the instrument, references the instruction manual for operation

and/or safety information.

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.

3.4 Product overview

This product is primarily intended for use in municipal drinking-water applications. Wastewater and

industrial applications must be identified to be applicable by the manufacturer before installation.

The Reagentless Chlorine Analyzer monitors the concentration of free or total residual chlorine in

water, and is most reliable at residual chlorine concentrations higher than 0.1 ppm (mg/L). The

combination of a sc model controller with a three-electrode chlorine sensor, optional pH sensor and a

flow sensor give the best monitoring function. Both sensors read sample temperature. The pH sensor

transmits the temperature reading to the controller display. The chlorine sensor uses its temperature

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English

measurement internally and does not transmit the measurement to the controller display. A pressure

regulator kit and an acidification and cleaning kit are available as accessories.

The chlorine and pH sensors rest in panel-mounted, series-connected flow cells. The flow cells

maintain the sensor-to-sample contact and help prevent the sensors from drying out when the

system is not in operation. Figure 1, Figure 2, Figure 3 show overviews of the system and the flow

cells.

Each sensor connects to the controller through the gateway mounted on the panel. The gateway

converts analog signals from the sensors to digital signals used by the controller. The controller

converts the digital signals to the chlorine, pH and temperature measurement values and shows the

readings in the display. The controller supplies power to the sensors and to the digital gateway.

The controller can be configured to cause an alarm condition or warning if measurement values rise

above or fall below specified values. For information on controller alarms, refer to the controller user

manual.

Note: Refer to the sensor user manual for information about how to store the sensors when the system is not in

operation.

Two analyzer configurations are available: a Grab Sample option (without pH sensor) and a pH

option. The Grab Sample option includes the mounting panel, the chlorine sensor and flow cell, a pH

flow cell without sensor, a flow sensor, the digital gateway and the controller. The pH option includes

these items plus a pH sensor.

A flow control valve regulates the sample flow. A constant flow rate of 30-50 L/h is recommended for

correct sensor operation (see Figure 1). The optimal flow rate is 40 L/hour. A single LED on the flow

sensor shows if the sample flow rate is sufficient. If the LED is not on, the flow rate must be adjusted

until the LED is on. The exact flow rate is not important as long as the LED is on, but the flow must

stay constant within the specifications.

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Figure 1 System overview

1 Controller 7 Sample in

2 Gateway 8 Valve, shutoff (customer-supplied)

3 Chlorine sensor cable 9 Chlorine flow cell

4 pH sensor (optional) 10 Flow sensor cable

5 Sample drain 11 Chlorine sensor

6 pH flow cell

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Figure 2 Chlorine flow cell overview

1 Flow sensor 9 Valve, cleaning port, 1/4 in. OD tube

2 Plug, 1/8 in. NPTF 10 Flow cell inlet

• English: Speed–fit fitting—1/4 in. OD

tube

• Metric: Speed–fit fitting—6 mm OD tube

3 Plug, 1/2 in. NPTF 11 Flow cell

4 Lock ring 12 Flow control valve

5 Sealing hub 13 Float

6 O-ring 14 Float alignment mark; MIN

7 Sample out fitting

• English: Speed–fit fitting—3/8 in. OD tube

• Metric: Speed–fit fitting—10 mm OD tube

15 Float alignment mark; MAX

8 Chlorine sensor alignment mark

English 7

Figure 3 pH flow cell overview

1 Lock ring 4 Sample out fitting

English: Speed–fit elbow fitting—1/2 in. OD

Metric: Speed–fit elbow fitting—12 mm OD

2 Sealing blank 5 Grab sample port

3 O-ring 6 Flow cell inlet

• English: Speed–fit fitting—3/8 in. OD

• Metric: Speed–fit fitting—10 mm OD

3.5 Product components

Make sure that all components have been received. Refer to Figure 1 on page 6. If any items are

missing or damaged, contact the manufacturer or a sales representative immediately.

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English

Figure 4 Reagentless chlorine analyzer panel

1 System panel 3 Tubing, 12 mm (½ in.)

2 Connector cable for connecting gateway to

controller, 1 m (3.3 ft)

4 Chlorine sensor

Section 4 Installation

4.1 Installation considerations

• Do the mechanical installation tasks first, the electrical installation tasks second, and the plumbing

installation tasks last.

• All fittings are designed to be tightened by hand only.

• The panel is designed to be wall or rack mounted indoors. Mount or position the panel in an

accessible location.

• Do not place the panel next to a heat source.

• Do not mount the panel in an environment with frequent vibrations

• Do not mount the panel in direct sunlight, which may affect chlorine readings.

• Install the panel indoors or in an environmental enclosure.

• Prevent condensation from collecting on the panel and panel components, especially the flow cell,

sensor and where the sensor and cable connect.

• Use PFA or PVDF linear low-density polyethylene tubing for the sample supply line and keep the

tubing as short as possible to minimize lag time.

• Sample pressure must be sufficient to keep a continuous water supply to the sensors. An LED

indicator on the flow sensor will be lit as long as the flow is sufficient.

• Keep the flow rate as constant as possible for best sensor operation.

4.2 Sample line guidelines

Select a good, representative sampling point for the best instrument performance. The sample must

be representative of the entire system.

To prevent erratic readings:

• Collect samples from locations that are sufficiently distant from points of chemical additions to the

process stream.

• Make sure that the samples are sufficiently mixed.

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• Make sure that all chemical reactions are complete.

4.3 Mechanical installation

4.3.1 Mount the panel

Figure 5 shows the mounting dimensions. Refer to the figure and follow the steps to mount the panel.

1. Attach mounting screws to the mounting surface. Mount on wall studs or use wall anchors. Leave

enough room between the head of each screw and the mounting surface so the panel will fit in

between.

2. Slide the panel mounting holes over the heads of the mounting screws and allow the panel to

slide down until the top of each mounting hole rests on the screw body.

3. Tighten each screw to secure the panel to the mounting surface.

4. Install the chlorine and pH sensor (optional) in the flow cells. For information on how to install a

sensors, refer to the sensor user manual.

Figure 5 Reagentless chlorine analyzer panel dimensions

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4.4 Electrical installation

4.4.1 Wire the panel

W A R N I N G

Potential Electrocution Hazard. Always disconnect power to the instrument when making

electrical connections.

The controller supplies power to the sensors and the digital gateway.

1. Remove power from the controller.

2. Connect the pH sensor (optional) wires to the gateway. For information on how to install sensors

in the flow cells, or how to connect the sensor to the gateway, refer to the sensor user manual.

3. Connect the chlorine sensor to the gateway. For information on how to connect the sensor to the

gateway, refer to the sensor user manual. Carefully read the labels on the cable connectors to

avoid mismatches.

Note: When the panel is shipped, the chlorine sensor cable is taped to the front of the panel near the location

of the sensor connection.

4. Connect the controller to the gateway with the 1 m connector cable that is supplied with the

panel. Connect the controler to the power source only when all other connections are finished

and checked.

4.5 Plumbing

4.5.1 Plumb the panel

Make sure to follow the size specifications for all panel tubing and fittings. The flow path must

increase in diameter as water flows through the system to prevent build-up of backpressure. Figure 1

on page 6 shows an overview of the plumbing connections.

1. Attach tubing to the sample inlet and outlet fittings.

2. Make sure the cleaning port on the chlorine flow cell is closed.

3. Make sure the grab sample port on the pH flow cell is closed.

4. Install chlorine and pH (optional) sensors according to the instructions foun in the corresponding

user manuals, prior to running the sample through the system.

5. Open the flow valve on the sample line and allow water to move through the system.

6. Make sure there are no leaks from the tubing, valve fittings or the flow cells.

7. To minimize air bubbles, the pH flow cell may be tilted between 0º and 30º as shown in Figure 6.

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Figure 6 pH flow cell tilt

Section 5 Operation

5.1 User navigation

Refer to the controller documentation for keypad description and navigation information.

Push the RIGHT arrow key on the controller multiple times to show more information on the home

screen and to show a graphical display.

5.2 System configuration

Sensor configuration and calibration are done through the controller user interface. For more

information on how to configure or calibrate a sensor, refer to the sensor user manual.

An sc model controller must be connected to the gateway.

1. From the controller main menu, select Sensor Setup.

The Chlorine Gateway (CGW) Setup menu is displayed.

2. Select Configure and customize the entries. Confirm after each entry to save the changes and go

back to the Configure menu.

Option Description

Edit name Edit the sensor name

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Option Description

Select Parameter—Chlorine (Total or

Free), pH (optional), Temperature

(optional)

Selects the parameter to be configured. Configuring

the selected parameter requires additional steps.

Refer to the sensor user manual for more

information.

Reset Defaults—Confirm to do the

reset.

Resets all settings to the factory default values.

5.3 System start up

Make sure all mechanical, electrical and plumbing tasks have been correctly done before starting

flow through the system.

1. Apply power to the controller.

When powered on for the first time, the controller displays the Language, Date Format and

Date/Time screens in order.

2. Set the language, date and time in the controller if this has not been done. Refer to the controller

user manual for more information on how to set these options.

The controller scans for connected devices.

3. Make sure the cleaning port and the grab sample port are closed, then open the ON/OFF valve

on the sample line to start the flow of water through the system.

The chlorine and pH flow cells will fill with water.

4. Make sure the flow sensor LED is on and the float is between the MIN and MAX marks. If the

LED is not on, adjust the flow control valve to increase or decrease the flow.

The flow sensor LED will be on when the flow is sufficient for good sensor operation. If the flow is

too high, the LED may not be lit. Make sure the float is between the MIN and MAX marks.

5. Check for leaks or blockages in the tubing and the flow cells. Shut off the flow to the panel if any

problems are discovered and make the necessary repairs.

6. When the system has sufficient flow, clear any warnings that appear on the controller display by

following the on-screen messages and prompts.

7. Push the HOME key.

The main measurement screen appears and shows the chlorine, temperature and pH (if a pH

sensor is connected) measurement values.

Section 6 Maintenance

C A U T I O N

Multiple hazards. Only qualified personnel must conduct the tasks described in this

section of the document.

6.1 Tubing replacement

Replace the tubing at least once a year. Replace brittle, cracked or leaky tubing immediately.

Replace old, discolored, fouled or damaged tubing with tubing of the same diameter and type (PFA

or PVDF tubing is preferred).

6.2 Clean a sensor flow cell

Clean a flow cell as necessary to remove deposits. Clean a flow cell if it becomes heavily

contaminated. Replace a flow cell if it becomes damaged, discolored or not transparent. It is not

necessary to remove a flow cell from the panel in order to clean it.

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Note: Never use detergents or surfactants to clean a chlorine flow cell.

1. Stop the source flow to the panel.

2. Remove the chlorine sensor and put the sensor in a container filled with a sample of the

chlorinated water.

Note: Do not disconnect the sensor from the power. If power is removed from the chlorine sensor, the sensor

must be conditioned and calibrated before use.

Note: The removal of a sensor from a flow cell with the sensor cable attached will cause a change in the sensor

signal outputs. Refer to the controller manual for more information on the Hold Output feature.

3. Rinse the flow cell with water and scrub the flow cell with a soft bristle brush to remove deposits.

4. Rinse the flow cell with water.

5. If the flow cell is not sufficiently clean, soak the flow cell for 10 to 15 minutes in a 1:3 mixture of

3-5% hydrogen peroxide solution and vinegar.

Note: Commercial rust removal liquids may be used in case of heavy contamination. However, this is not

recommended because they can cause damage to the flow cell material.

6. Rinse the flow cell with water.

7. Install the sensor in the flow cell and start the sample flow.

6.3 Replace the flow sensor

Under normal conditions, the flow sensor does not require regular maintenance or replacement.

However, if the LED flow indicator does not light when the float is between the MIN and MAX marks

and power is applied, the sensor may need to be replaced. To replace the flow sensor, do the

illustrated steps that follow.

Note: It is not necessary to remove the chlorine sensor, drain the flow cell or power down the controller to replace

the flow sensor.

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6.4 Replace the flow control valve assembly

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Section 7 Troubleshooting

7.1 Event log

The controller provides one event log for each sensor. The event log stores a variety of events that

occur on the devices such as calibrations done, calibration options changed, etc. A list of possible

events is shown below. The event log can be read out in a CSV format. For instructions on

downloading the logs, refer to the controller user manual.

Table 1 Event log

Event Description

Power On The power was turned on.

Flash Failure The external flash has failed or is corrupted.

1pointpHCalibration_Start Start of one-point sample calibration for pH

1pointpHCalibration_End End of one-point sample calibration for pH

2pointpHCalibration_Start Start of two-point sample calibration for pH

2pointpHCalibration_End End of two-point sample calibration for pH

1pointBufferpHCalibration_Start Start of one-point buffer calibration for pH

1pointBufferpHCalibration_End End of one-point buffer calibration for pH

2pointBufferpHCalibration_Start Start of two-point buffer calibration for pH

2pointBufferpHCalibration_End End of two-point buffer calibration for pH

TempCalibration_Start Start of temperature calibration

TempCalibration_End End of temperature calibration

1pointChemZeroCL2_Start Start of one-point chemical zero calibration for chlorine

1pointChemZeroCL2_End End of one-point chemical zero calibration for chlorine

1pointElecZeroCL2_Start Start of one-point electrical zero calibration for chlorine

1pointElecZeroCL2_End End of one-point electrical zero calibration for chlorine

1pointProcessConc_Start Start of one-point process concentration for chlorine

1pointProcessConc _End End of one-point process concentration for chlorine

2pointChemCL2_Start Start of two-point chemical calibration for chlorine

2pointChemCL2_End End of two-point chemical calibration for chlorine

2pointElecCL2_Start Start of two-point electrical calibration for chlorine

2pointElecCL2_End End of two-point electrical calibration for chlorine

CL2CalSetDefault The chlorine calibration was reset to the default.

pHCalSetDefault The pH calibration data was reset to the default.

TempCalSetDefault The temperature calibration data was reset to the default.

AllCalSetDefault All sensor calibration data was reset to the default.

CL2CalOptionChanged The chlorine calibration option was changed.

pHCalOptionChanged The pH calibration option was changed.

English 17

Table 1 Event log (continued)

Event Description

TempCalOptionChanged The temperature calibration option was changed.

SensorConfChanged The sensor configuration was changed.

ResetCL2CalHist The CL2 calibration history was reset.

ResetpH CalHist The pH calibration history was reset.

ResetTemp CalHist The temperature calibration history was reset.

ResetAllSensorsCalHist All sensor calibration history was reset.

ResetCL2Sensor The CL2 calibration data (sensor days, calibration history and

calibration data) was reset to the default.

ResetpHSensor The pH calibration data (sensor days, calibration history and

calibration data) was reset to the default.

ResetTempSensor The temperature calibration data (sensor days, calibration history

and calibration data) was reset to the default.

ResetAllSensors All sensor calibration data (sensor days, calibration history and

calibration data) was reset to the default.

Flow Detection The state of the proximity sensor has changed (sufficient or not

sufficient flow).

7.2 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.

PH TOO LOW The pH value is less than 0 pH. Calibrate or replace the pH sensor.

PH TOO HIGH The pH value is more than 14 pH.

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Table 2 Error list for the sensor (continued)

Error Description Resolution

PH SLOPE FAIL The slope is outside of the -45 to

-65 mV/pH range.

Clean the pH sensor, then repeat the

calibration with a fresh buffer or sample,

or replace the sensor.

PH OFFSET

FAIL

The offset is outside of ±60 mV. Clean the pH sensor and then repeat

the calibration with a fresh buffer or

sample, or replace the sensor.

PH OFFSET

FAIL

The offset is outside of ±60 mV. Clean the pH sensor and replace the

salt bridge and standard cell solution.

Repeat the calibration with a fresh

buffer or sample, or replace the sensor.

TEMP TOO

LOW

The temperature is less than 0 °C. Calibrate the temperature or replace the

pH sensor.

TEMP TOO

HIGH

The temperature is more than 100 °C.

TEMP FAIL The offset is higher than 5.0 °C or

lower than -5.0 °C.

Calibrate the temperature or replace the

pH sensor.

NO FLOW The flow level is too low. Increase the flow.

7.3 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 key and select Sensor Diag, Warning List. A list of possible warnings is shown below.

Table 3 Warning list for the sensor

Warning Description Resolution

CL CAL RECD A chlorine and/or pH calibration is

recommended.

The chlorine and/or pH measurement has

changed enough to cause a Cal Watch warning

alarm to occur. Refer to the sensor manuals for

more information.

Calibrate the chlorine sensor

and/or pH sensor.

CL CAL RECD A chlorine calibration is recommended.

Chlorine calibration data is not available (sensor

with default calibration data).

Calibrate the chlorine sensor.

PH CAL RECD A pH calibration is recommended.

pH calibration data is not available (sensor with

default calibration data).

Calibrate the pH sensor.

TEMP CAL

RECD

A temperature calibration is recommended.

Temperature calibration data is not available

(sensor with default calibration data).

Calibrate the temperature.

CL CAL TO DO The Sensor Days value for the chlorine sensor

is greater than the Cal Reminder value.

Calibrate the chlorine sensor.

PH CAL TO DO The Sensor Days value for the pH sensor is

greater than the Cal Reminder value.

Calibrate the pH sensor.

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Table 3 Warning list for the sensor (continued)

Warning Description Resolution

TEMP CAL TO

DO

The Sensor Days value for the temperature

sensor is greater than the Cal Reminder value.

Calibrate the temperature.

CL MAINT

RECD

Chlorine sensor maintenance is recommended.

The slope is 30 to 45% of default or the slope is

250 to 300% of default.

The default slope is 100 mV/ppm (100%).

Do sensor maintenance and

then repeat the calibration, or

replace the sensor.

CL MAINT

RECD

Chlorine sensor maintenance is recommended.

The offset is -50 mV to 45 mV or the offset is

45 mV to 50 mV.

Do sensor maintenance and

then repeat the calibration, or

replace the sensor.

PH MAINT

RECD

pH sensor maintenance is recommended.

The slope is outside of the -50 to -61 mV/pH

range.

Clean the pH sensor, then

repeat the calibration with a

fresh buffer or sample, or

replace the sensor.

PH MAINT

RECD

pH sensor maintenance is recommended.

The offset is outside of ±45 mV but within

±60 mV.

Clean the sensor and then

repeat the calibration, or

replace the sensor.

PH MAINT

RECD

pH sensor maintenance is recommended.

The offset is outside of ±45 mV but within

±60 mV.

Clean the sensor and replace

the salt bridge and standard

cell solution and then repeat

the calibration, or replace the

sensor.

T MAINT RECD The temperature offset is outside of ±3 °C but

within ±5 °C.

Calibrate the temperature.

Section 8 Replacement parts and accessories

W A R N I N G

Personal injury hazard. Use of non-approved parts may cause personal injury, damage

to the instrument or equipment malfunction. The replacement parts in this section are

approved by the manufacturer.

Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to

the company website for contact information.

Parts

Description Item no.

Cable, gateway to controller, 1 m 6122400

Cable assembly, 4 pin, shielded, flow sensor, 2 m 9160900

Cable assembly, 5 pin, shielded, M12, chlorine sensor, 1 m 9160300

Fitting, inlet port for chlorine flow cell

9159200 (1/4 in.)

9196400 (6 mm)

Fitting, speed fit, outlet port for chlorine flow cell or inlet port for pH flow cell

9159300 (3/8 in.)

9196500 (10 mm)

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