HACH 3422 Series Contacting Conductivity Sensors User Manual

HACH 3422 Series Contacting Conductivity Sensors

Section 1 Specifications

Specifications are subject to change without notice.

outer electrode for extended sensor body style used with ball valve assembly), PTFE insulator, and treated FKM/FPM O-ring seals

3433 series —Graphite electrodes, Ryton body, and FKM/FPM O-ring seals

3444 series —316 stainless steel and titanium electrodes, PEEK insulator, and fluoroelastomer O-ring seals

3455 series —316 stainless steel electrodes, PTFE insulator, and perfluoroelastomer O-ring seals

Sensor cable| 4-conductor (plus 2 shields), 6 m (20 ft); rated at 150 °C (302 °F)
Measuring range| Cell constant 0.05 —0–100 μS/cm Cell constant 0.5 —0–1000 μS/cm Cell constant 1 —0–2000 μS/cm Cell constant 5 —0–10,000 μS/cm Cell constant 10 —0–200,000 μS/cm
Response time| 90% of reading within 30 seconds of step change
Repeatability/precision (0–20 μS/cm)| ±0.1 μS/cm
Repeatability/precision (20–200,000 μS/cm)| ±0.5% of reading
Maximum flow rate| 0–3 m/s (0–10 ft/s)
Specification| Details
---|---
Pollution degree| 2
Overvoltage category| I
Protection class| III
Altitude| 2000 m (6562 ft) maximum
Operating temperature| -20 to 60 °C (-4 to 140 °F)
Storage temperature| -20 to 70 °C (-4 to 158 °F)
Weight| Approximately 1 kg (2.2 lbs)
Wetted materials| 3422 series —Titanium electrodes (316 stainless steel outer electrode for extended sensor body style used with ball valve assembly), PTFE insulator, and treated FKM/FPM O-ring seals 3433 series —Graphite electrodes, Ryton body, and FKM/FPM O-ring seals 3444 series —316 stainless steel and titanium electrodes, PEEK insulator, and fluoroelastomer O-ring seals 3455 series —316 stainless steel electrodes, PTFE insulator, and perfluoroelastomer O-ring seals
Sensor cable| 4-conductor (plus 2 shields), 6 m (20 ft); rated at 150 °C (302 °F)
Measuring range| Cell constant 0.05 —0–100 μS/cm Cell constant 0.5 —0–1000 μS/cm Cell constant 1 —0–2000 μS/cm Cell constant 5 —0–10,000 μS/cm Cell constant 10 —0–200,000 μS/cm
Response time| 90% of reading within 30 seconds of step change
Repeatability/precision (0–20 μS/cm)| ±0.1 μS/cm
Repeatability/precision (20–200,000 μS/cm)| ±0.5% of reading
Maximum flow rate| 0–3 m/s (0–10 ft/s)

Section 2 General information

In no event will the manufacturer be liable for damages resulting from any improper use of product or failure to comply with the instructions in the 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

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 soley 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.

D A N G E R 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 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.

Product overview

This sensor is designed to work with a controller for data collection and operation. Different controllers can be used with this sensor.
This document assumes sensor installation and use with an SC4500 Controller.
To use the sensor with other controllers, refer to the user manual for the controller that is used.
Optional equipment, such as mounting hardware for the sensor, is supplied with installation instructions. Several mounting options are available, allowing the sensor to be adapted for use in many different applications.

Sensor styles

The sensor is available in different styles. Refer to Figure 1.

Figure 1 Sensor styles

Boiler/condensate

Section 3 Installation

Mounting

W A R N I N G

Explosion hazard. For installation in hazardous (classified) locations, refer to the instructions and control drawings in the controller Class 1, Division 2 documentation. Install the sensor according to local, regional and national codes. Do not connect or disconnect the instrument unless the environment is known to be non-hazardous.

W A R N I N G

Explosion hazard. Make sure that the mounting hardware for the sensor has a temperature and pressure rating sufficient for the mounting location.

• Install the sensor where the sample that comes into contact with the sensor is representative of the entire process.
• Refer to Replacement parts and accessories on page 18 for the available mounting hardware.
• Refer to the instructions supplied with the mounting hardware for installation information.
• Calibrate the sensor before use. Refer to Calibrate the sensor on page 10. For examples of sensors in different applications, refer to Figure 2. Mounting hardware for T-mount, end of pipe immersion and wall insertion is customer-supplied.
  Always consider the temperature and pressure rating of the mounting hardware that is used to install the sensor. The hardware material usually limits the temperature and pressure rating of the system.

Figure 2 Mounting examples

1 Flow-thru T-mount, ¾ or ½-in. NPT tee| 4| End of pipe immersion| 7 Ball valve insertion, compression-style sensor with extended sensor body
---|---|---|---
2 Non-metallic sensor, flow-thru T- mount, ¾-in. NPT| 5| Sanitary (CIP) flange mount
3 Non-metallic sensor, end of pipe immersion| 6| Boiler wall insertion mount

Connect the sensor to an SC Controller

Use one of the options that follows to connect the sensor to an SC Controller:

• Install a sensor module in the SC Controller. Then, connect the bare wires of the sensor to the sensor module. The sensor module converts the analog signal from the sensor to a digital signal.
• Connect the bare wires of the sensor to an sc digital gateway, then connect the sc digital gateway to the SC Controller. The digital gateway converts the analog signal from the sensor to a digital signal.
  Refer to the instructions supplied with the sensor module or sc digital gateway.

Section 4 Operation

W A R N I N G

Fire hazard. This product is not designed for use with flammable liquids.

User navigation

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

Configure the sensor

Use the Settings menu to enter a sensor name and select the type of sensor. Change options for measurement, calibration, data handling and storage.

1. Select the main menu icon, then select Devices. A list of all of the available devices shows.
2. Select the sensor and select Device menu > Settings.
3. Select an option.
   • For sensors connected to a conductivity module, refer to Table 1.
   • For sensors connected to an sc digital gateway, refer to Table 2.

Table 1 Sensors connected to conductivity module

measurement screen. The name is limited to 16 characters in any combination of letters, numbers, spaces or punctuation.
Sensor S/N| Lets the user enter the serial number of the sensor. The serial number is limited to 16 characters in any combination of letters, numbers, spaces or punctuation.
Measurement type| Changes the measured parameter to Conductivity (default), TDS (total dissolved solids), Salinity or Resistivity. When the parameter is changed, all other configured settings are reset to the default values.
Format| Changes the number of decimal places that are shown on the measurement screen to Auto (default), X.XXX, XX.XX, XXX.X or XXXX. When Auto is selected, the decimal places automatically change.
Unit| Changes the units for the selected measurement—conductivity: μS/cm (default), mS/cm, μS/m, mS/m or S/m; resistivity: MΩ (default), kΩ, Ωcm or Ωm; TDS: ppm (default) or ppb; salinity: 0/00 (ppt)
Temperature| Sets the temperature units to °C (default) or °F.
T-compensation| Adds a temperature-dependent correction to the measured value—Linear (default: 2.0%/°C, 25 °C), Ammonia, Temperature compensation table, None, Natural water or Pure water.

When Temperature compensation table is selected, the user can enter x,y (%/°C, °C) points in ascending order.

Note: The Natural water and Pure water options are not available when the Measurement type setting is set to TDS.

TDS (total dissolved solids)| Note: The TDS (total dissolved solids) setting is only available when the Measurement type setting is set to TDS.
Sets the factor that is used to convert conductivity to TDS—NaCl (default) or Custom (enter a factor between 0.01 and 99.99 ppm/µS, default: 0.49 ppm/µS).
Cell constant parameters| Select the cell constant K.—Sets the cell constant range to 0.05, 0.5, 1.0 (default), 5.00, 10.0, or 0.01, 0.1, 1.0 Polymetron.
Cell constant—Enters the actual certified K value from the label on the sensor cable. When the certified K value is entered, the calibration curve is defined.
Cable length| Sets the actual length of the sensor cable to improve measurement accuracy (default: 20 ft (Polymetron sensors default: 5 ft)).
Temperature element| Sets the temperature element for automatic temperature compensation to PT100, PT1000 (default) or Manual. If no element is used, set to Manual and set a value for temperature compensation (default: 25 °C).

When Temperature element is set to PT100 or PT1000, refer to Adjust the T-factor for non-standard cable lengths on page 10 to set the Temperature factor setting.

Note: If Temperature element is set to Manual and the sensor is replaced or the sensor days are reset, Temperature element automatically changes back to the default setting (PT1000).

constant calculates the average value during a specified time—0 (no effect, default) to 200 seconds (average of signal value for 200 seconds). The filter increases the time for the sensor signal to respond to actual changes in the process.
Data logger interval| Sets the time interval for sensor and temperature measurement storage in the data log— 5, 30 seconds or 1, 2, 5, 10, 15 (default), 30, 60 minutes
Reset to default values| Sets the Settings menu to the factory default settings and resets the counters. All sensor information is lost.
Option| Description
---|---
Name| Changes the name that corresponds to the sensor on the top of the measure screen. The name is limited to 12 characters in any combination of letters, numbers, spaces or punctuation.
Measurement type| Changes the measured parameter to Conductivity (default), Resistivity, TDS (total dissolved solids) or Salinity. When the parameter is changed, all other configured settings are reset to the default values.
Unit| Changes the units for the selected measurement—conductivity: μS/cm (default) or mS/cm; resistivity: MΩ (default) or kΩ; TDS: ppm (default) or ppb; salinity: 0/00 (ppt)
Temperature| Sets the temperature units to °C (default) or °F.
Format| Changes the number of decimal places that are shown on the measurement screen to X.XXX, XX.XX, XXX.X or XXXX (default).
Filter| Sets a time constant to increase signal stability. The time constant calculates the average value during a specified time—0 (no effect, default) to 60 seconds (average of signal value for 60 seconds). The filter increases the time for the sensor signal to respond to actual changes in the process.
Data logger interval| Sets the time interval for sensor and temperature measurement storage in the data log— Disabled, 5, 10, 15, 30 seconds, 1, 5, 10, 15 (default), 30 minutes or 1, 2, 6, 12 hours
TDS (total dissolved solids)| Note: The TDS (total dissolved solids) setting is only available when the Measurement type setting is set to TDS.
Sets the factor that is used to convert conductivity to TDS—NaCl (default) or User defined entries (enter a factor between 0.01 and 99.99 ppm/µS, default: 0.492 ppm/µS).
Cell constant parameters| Select the cell constant K.—Sets the cell constant range to 0.01, 0.05, 0.10, 0.5 (default), 1.0 HACH, 1.0 Polymetron, 5.00 or 10.0.
Cell constant—Enters the actual certified K value from the label on the sensor cable. When the certified K value is entered, the calibration curve is defined.
T-compensation| Adds a temperature-dependent correction to the measured value—Linear (default: 2.0%/°C, 25 °C), Ammonia, Natural water, User compensation table or None.
When User compensation table is selected, the user can enter x,y (%/°C, °C) points in ascending order. Note: The Natural water option is not available when the Measurement type setting is set to TDS.
Temperature sensor| Sets the temperature element for automatic temperature compensation to Manual, PT100 or PT1000 (default). If no element is used, set to Manual and set a value for temperature compensation (default: 25 °C).

When Temperature sensor is set to PT100 or PT1000, refer to Adjust the T-factor for non-standard cable lengths on page 10 to set the Factor selection setting.

Note: If Temperature sensor is set to Manual and the sensor is replaced or the sensor days are reset, the Temperature sensor setting automatically changes back to the default setting (PT1000).

the best noise rejection. Options: 50 or 60 Hz (default).
Reset setup| Sets the Settings menu to the factory default settings and resets the counters. All sensor information is lost.

Adjust the T-factor for non-standard cable lengths

When the sensor cable is extended or shortened from the standard 6 m (20 ft), the resistance of the cable changes. This change reduces the accuracy of temperature measurements. To correct for this difference, calculate a new T-factor.

1.  Measure the temperature of a solution with the sensor and with an independent, reliable instrument such as a thermometer.

2. Record the difference between the temperature measured from the sensor and from the independent source (actual).
   For example, if the actual temperature is 50 °C and the sensor reading is 53 °C, the difference is 3 °C.

3. Multiply this difference by 3.85 to get the adjustment value. Example: 3 x 3.85 = 11.55.

4. Calculate a new T-factor:

   • Sensor temperature > actual—add the adjustment value to the T-factor that is on the label on the sensor cable
   • Sensor temperature < actual—subtract the adjustment value from the T-factor that is on the label on the sensor cable

5.  Select Settings > Temperature element (or Temperature sensor) > Temperature factor (or Factor selection) and enter the new T-factor.

Calibrate the sensor

W A R N I N G

Fluid pressure hazard. Removal of a sensor from a pressurized vessel can be dangerous. Reduce the process pressure to below 7.25 psi (50 kPa) before removal. If this is not possible, use extreme caution. Refer to the documentation supplied with the mounting hardware for more information.

W A R N I N G

Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets (MSDS/SDS) for safety protocols.
C A U T I O N

Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.

About sensor calibration

Two methods can be used to calibrate the conductivity sensor:

• Dry cal —enter the unique cell constant K and T-factor from the sensor label in the Settings > Cell constant parameters menu to define the calibration curve.
• Wet cal —use air (Zero Cal) and a reference solution or process sample of known value to define a calibration curve. A reference solution calibration is recommended for best accuracy. When the

process sample is used, the reference value must be determined with a secondary verification instrument. Be sure to enter the T-factor in Temperature element of the Settings menu for accurate temperature compensation.

During calibration, data is not sent to the datalog. Thus, the datalog can have areas where the data is intermittent.

Change calibration options

For sensors connected to a conductivity module, the user can set a reminder or include an operator ID with calibration data from the Calibration options menu.
Note: This procedure is not applicable to sensors connected to an sc digital gateway.

1. Select the main menu icon, then select Devices. A list of all of the available devices shows.
2.  Select the sensor and select Device menu > Calibration.
3. Select Calibration options.
4. Select an option.

A reminder to calibrate the sensor shows on the display after the selected interval from the date of the last calibration.
For example, if the date of the last calibration was June 15 and Last calibration is set to 60 days, a calibration reminder shows on the display on August 14. If the sensor is calibrated before August 14, on July 15, a calibration reminder shows on the display on September 13.
Operator ID for calibration| Includes an operator ID with calibration data—Yes or No (default). The ID is entered during the calibration.

Zero calibration procedure

Use the zero calibration procedure to define the unique zero point of the conductivity sensor. The zero point must be defined before the sensor is calibrated for the first time with a reference solution or process sample.

1.  Remove the sensor from the process. Wipe the sensor with a clean towel or use compressed air to make sure the sensor is clean and dry.
2. Select the main menu icon, then select Devices. A list of all of the available devices shows.
3. Select the sensor and select Device menu > Calibration.
4. Select Zero calibration (or 0-point 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
   Active| The sensor output value is held at the current measured value during the calibration procedure.
   Active| The sensor output value is held at the current measured value during the calibration procedure.
6. Hold the dry sensor in the air and push OK.
7. Do not push OK until the calibration result shows on the display.
8. Review the calibration result:
   • “The calibration was successfully completed.”—The sensor is calibrated and ready to measure samples. The slope and/or offset values are shown.
   • “The calibration failed.” —The calibration slope or offset is outside of accepted limits. Repeat the calibration with fresh reference solutions. Clean the sensor if necessary.
9. Push OK
10. Proceed to the calibration with a reference solution or process sample.

Calibration with the process sample

The sensor can remain in the process sample, or a portion of the process sample can be removed for calibration. The reference value must be determined with a secondary verification instrument.
Note: If the sensor is calibrated for the first time, be sure to complete the zero calibration first.

1. Select the main menu icon, then select Devices. A list of all of the available devices shows.

2. Select the sensor and select Device menu > Calibration.

3. Select Calibration (or 1-point value calibration).
   Note: Use the Measurement type setting to change the parameter that is calibrated.

4.  Select the option for the output signal during calibration:
   Option| 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. With the sensor in the process sample, push OK.
   The measured value is shown.

6.  Wait for the value to stabilize and push OK.
   Note: The screen may advance to the next step automatically.

7. Measure the conductivity (or other parameter) value with a secondary verification instrument. Use the arrow keys to enter the measured value and push OK.

8. Review the calibration result:

   • “The calibration was successfully completed.”—The sensor is calibrated and ready to measure samples. The slope and/or offset values are shown.
   • “The calibration failed.” —The calibration slope or offset is outside of accepted limits. Repeat the calibration with fresh reference solutions. Clean the sensor if necessary.

9. Push OK to continue.

10. Return the sensor to the process and push OK.
    The output signal returns to the active state and the measured sample value is shown on the measurement screen.

Temperature calibration

The instrument is calibrated at the factory for accurate temperature measurement. The temperature can be calibrated to increase accuracy.

1. Put the sensor in a container of water.
2. Measure the temperature of the water with an accurate thermometer or independent instrument.
3. Select the main menu icon, then select Devices. A list of all of the available devices shows.
4. Select the sensor and select Device menu > Calibration.
5. Select 1-point temperature calibration (or Temperature adjustment).
6. Enter the exact temperature value and push OK.
7. Return the sensor to the process.

Exit calibration procedure

1. To exit a calibration, push the back icon.
2. Select an option, then push OK.

start from the beginning.
Return to calibration| Return to the calibration.
Leave calibration (or Exit)| Exit the calibration temporarily. Access to other menus is allowed. A calibration for a
second sensor (if present) can be started.

Reset the calibration

The calibration can be reset to the factory default settings. All sensor information is lost.

1. Select the main menu icon, then select Devices. A list of all of the available devices shows.
2. Select the sensor and select Device menu > Calibration.
3. Select Reset to default calibration values or Reset to calibration defaults (or Reset setup) , then push OK.
4. Push OK again.

Modbus registers

A list of Modbus registers is available for network communication. Refer to the manufacturer’s website for more information.

Section 5 Maintenance

W A R N I N G
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the document

W A R N I N G
Explosion hazard. Do not connect or disconnect the instrument unless the environment is known to be non-hazardous. Refer to the controller Class 1, Division 2 documentation for hazardous location instructions.

W A R N I N G
Fluid pressure hazard. Removal of a sensor from a pressurized vessel can be dangerous. Reduce the process pressure to below 7.25 psi (50 kPa) before removal. If this is not possible, use extreme caution. Refer to the documentation supplied with the mounting hardware for more information.

W A R N I N G
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets (MSDS/SDS) for safety protocols .

C A U T I O N
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and national regulations.

Clean the sensor

Pre-requisite: Prepare a mild soap solution with warm water and dishwashing detergent, Borax hand soap or a similar soap.
Examine the sensor periodically for debris and deposits. Clean the sensor when there is a buildup of deposits or when performance has degraded.

1.  Use a clean, soft cloth to remove loose debris from the end of the sensor. Rinse the sensor with clean, warm water.
2. Soak the sensor for 2 to 3 minutes in the soap solution.
3. Use a soft bristle brush to scrub the entire measuring end of the sensor.
4. If debris remains, soak the measuring end of the sensor in a dilute acid solution such as < 5% HCl for a maximum of 5 minutes.
5. Rinse the sensor with water and then return to the soap solution for 2 to 3 minutes.
6. Rinse the sensor with clean water.
   Always calibrate the sensor after maintenance procedures are done.

Section 6 Troubleshooting

Intermittent data

During calibration, data is not sent to the datalog. Thus, the datalog can have areas where the data is intermittent.

Test the conductivity sensor

If a calibration fails, first complete the maintenance procedures in Maintenance on page 13.

1. Disconnect the sensor wires.
2. Use an ohmmeter to test the resistance between the sensor wires as shown in Table 3.
   Note : Be sure that the ohmmeter is set to its highest range for all infinite (open circuit) resistance readings.

Table 3 Conductivity resistance measurements

If one or more of the measurements is incorrect, call technical support. Supply technical support with the serial number of the sensor and the resistance values measured.

Diagnostics/Test menu

The Diagnostics/Test menu shows current and historical information about the sensor. Refer to Table 4. Push the main menu icon, then select Devices. Select the device and select Device menu
> Diagnostics/Test.

Table 4 Diagnostics/Test menu

only—Shows the version and the serial number of the conductivity module.
Sensor information| For sensors connected to a conductivity module—Shows the sensor name and the serial number entered by the user.

For sensors connected to an sc digital gateway—Shows the sensor model number and the sensor serial number. Shows the software version and driver version installed.

Last calibration| For sensors connected to a conductivity module only—Shows the number of days since the last calibration was done.
Calibration history| For sensors connected to a conductivity module—Shows the date and time of the previous calibrations.
For sensors connected to an sc digital gateway—Shows a list of the calibrations and the details for each calibration.
Reset the calibration history| For sensors connected to a conductivity module only—For service use only
Sensor signals

(or Signals )

| For sensors connected to a conductivity module only—Shows the current sensor signal and the measurement range.
For sensors connected to an sc digital gateway—Shows the conductivity counter value and temperature sensor resistance.
Sensor days

(or Counter )

| Note: The Sensor days (or Counter ) option is not available for contacting conductivity sensors that are connected to an sc digital gateway.

Shows the number of days that the sensor has been in operation.
For sensors connected to an sc digital gateway—Select Counter to show the number of days that the sensor has been in operation. To reset the counter to zero, select Reset. Reset the Sensor days counter when the sensor is replaced.

Reset| For sensors connected to a conductivity module only—Sets the Sensor days counter to zero.
Reset the Sensor days counter when the sensor is replaced.
Factory calibration| For sensors connected to a conductivity module only—For service use only

Error list

When an error occurs, the reading on the measurement screen flashes and all outputs are held when specified in the Controller > Outputs menu. The screen changes to red. The diagnostics bar shows the error. Push on the diagnostic bar to show the errors and warnings. As an alternative, push the main menu icon, then select Notifications > Errors.

A list of possible errors is shown in Table 5.

Table 5 Error list

• The measured value is not within the range selected for the Conductivity unit setting.

| Make sure that the sensor is configured for the correct cell constant.
|

•  The measured value is > 2,000,000 µS/cm, 1,000,000 ppm or 20,000 ppt.

|
Conductivity is too low.| The measured value is < 0 µS/cm, 0 ppm or 0 ppt.| Make sure that the sensor is configured for the correct cell constant.
Zero is too high.| The zero calibration value is > 500,000 counts.| Make sure that the sensor is held in air during zero calibration and is not located near radio frequency or electromagnetic interference.

Make sure that the cable is shielded by metal conduit.

Zero is too low.| The zero calibration value is < –500,000 counts.
Temperature is too high.| The measured temperature is > 130 °C.| Make sure that the correct temperature element is selected. Refer to Configure the sensor on page 8.
Temperature is too low.| The measured temperature is < –10 °C.
ADC failure| The analog to digital conversion failed.| Power off and power on the controller. Contact technical support.
Sensor is missing.| The sensor is missing or disconnected.| Examine the wiring and connections for the sensor and for the module (or digital gateway). Make sure that the terminal block is fully inserted into the module, if applicable.
Measurement value is out of range.| The sensor signal is outside of the accepted limits for the cell constant that is used (0.01 and 0.05: 100 µS/cm; 0.5: 1000 µS/cm; 1: 2000 µS/cm; 5: 10,000 µS/cm; 10: 200,000 µS/cm).| Make sure that the sensor is configured for the correct cell constant.

Warning list

A warning does not affect the operation of menus, relays and outputs. The screen changes to an amber color. The diagnostics bar shows the warning. Push on the diagnostic bar to show the errors and warnings. As an alternative, push the main menu icon, then select Notifications > Warnings. A list of possible warnings is shown in Table 6.

Table 6 Warning list

sure that the sensor is held in air during zero calibration and is not located near radio frequency or electromagnetic interference.
Make sure that the cable is shielded by metal conduit.
Zero is too low.| The zero calibration value is < –300,000 counts.
Temperature is too high.| The measured temperature is > 100 °C.| Make sure that the sensor is configured for the correct temperature element.
Temperature is too low.| The measured temperature is < 0 °C.
Calibration is overdue.| The Cal Reminder time has expired.| Calibrate the sensor.
Warning| Description| Resolution
---|---|---
The device is not calibrated.| The sensor has not been calibrated.| Calibrate the sensor.
Replace a sensor.| The Sensor days counter is more than the interval selected for sensor replacement. Refer to Configure the sensor on page 8.| Replace the sensor. Reset the Sensor days counter on the Diagnostics/Test > Reset menu (or Diagnostics/Test > Counter menu.
Calibration is in progress…| A calibration was started but not completed.| Return to calibration.
Outputs on hold| During calibration, the outputs were set to hold for a selected time.| The outputs will become active after the selected time period. As an alternative, remove and then supply power to the controller.
Linear temperature compensation is out of range.| The user-defined linear temperature compensation is out of range.| The value must be between 0 and 4%/°C; 0 to 200 °C.
Temperature compensation table is out of range.| The user-defined temperature compensation table is out of range.| The temperature is above or below the temperature range defined by the table.

Event list

The diagnostic bar shows current activities such as configuration changes, alarms, warning conditions, etc. A list of possible events is shown in Table 7. Previous events are recorded in the event log, which can be downloaded from the controller. Refer to the controller documentation for data retrieval options.

Table 7 Event list

expired.
The calibration failed.| The calibration failed.
The calibration is high.| The calibration value is above the upper limit.
K is out of range.| The cell constant K is out of range for the current calibration.
The reading is unstable.| The reading during calibration was unstable.
Change in configuration float value| The configuration was changed—floating point type.
Change in configuration text value| The configuration was changed—text type.
Change in configuration int value| The configuration was changed—integer value type.
Change in configuration| The configuration was reset to the default options.
Power is on.| The power was turned on.
ADC failure| The analog to digital conversion failed (hardware failure).
Flash erase| The flash memory was erased.
Temperature| The recorded temperature is too high or too low (-20 to 200 °C).
The sample calibration was started.| Start of calibration for conductivity
Event| Description
---|---
The sample calibration is completed.| End of calibration for conductivity
The zero calibration was started.| Start of zero calibration
The zero calibration is completed.| End of zero calibration

Section 7 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.

Consumables

Parts and accessories

Description Item no.

Sanitary tee, 1½-inch 9H1388
Sanitary tee, 2-inch 9H1310

Accessories

Accessories for C1D2 locations

5796001
Digital extension cable with two connector safety locks, 15 m (50 ft)| 5796101
Digital extension cable with two connector safety locks, 30 m (100 ft)| 5796201
Safety lock for quick-connect fitting, Class 1 Division 2 installations| 6139900

References

• Geräte und Reagenzien für die Wasserqualitätsanalyse | Hach
• Hach | Hach

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