Hach-Lange POLYMETRON 9526 - Manual (Page 19)

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 a 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.
Troubleshooting
Sensor diagnostic and test menu
The sensor diagnostic and test menu shows current and historical information about the instrument.
Refer to
Table 2 .
To access the sensor diagnostic and test menu, push the menu key and select SENSOR
SETUP>DIAG/TEST.
Table 2 Sensor DIAG/TEST menu
Option Description
MODULE INFORMATION Shows information about the sensor module.
SENSOR INFORMATION Shows the name and serial number that was entered
by the user.
CAL DAYS Shows the number of days since the last calibration.
CAL HISTORY Shows a list of all calibrations by date/time stamp. Use
the arrows keys to select a calibration and push enter
to view the details.
RESET CAL HISTORY Resets the calibration history for the sensor (requires
service-level passcode). All previous calibration data is
lost.
POLARIZATION Contacting conductivity sensors only. Shows
information about the electrode polarization, the cable
capacitance and the time before the next
measurement.
SENSOR SIGNALS Shows the current sensor signal information.
MEMBRANE DAYS Shows the number of days that the membrane has
been in operation.
RESET MEMBRANE Resets the number of days that the membrane has
been in operation and resets all calibration data to
defaults.
Error list
Errors may occur for various reasons. An error icon consists of an exclamation point within a circle.
When an error occurs, the error icon and the measurement screen flash alternately in the main
display. All outputs are held when specified in the controller menu. To view errors, push the menu
key and select DIAGNOSTICS. Then select the device to view any problems associated with that
device.
A list of possible errors is shown in
Table 3 .
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