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5.1
Overview
This section describes various possible problems and the means to correct them.
5.2
Checking the Sensor
Use the troubleshooting section in the instrument instruction manual to determine whether the sensor or
instrument is defective. If the sensor is suspected, check it using the following procedure:
Step
1
Disconnect the sensor from the instrument (or junction box if interconnect cable is used).
2
Clean the sensor using the procedure in Section 6.
With the sensor at a temperature between 23 °C and 27 °C, measure the resistance between the red
3
and yellow wires with an ohmmeter. The reading should be between 1090 and 1105 ohms.
4
Measure the resistance between the white and blue wires. The reading should be less than 5 ohms.
Now measure the resistance between the green and yellow wires. The reading should also be less
than 5 ohms.
5
Place the ohmmeter to its highest range and measure the resistance between the shield and white
wires. The reading should indicate infinity (open circuit).
6
If any one of the resistance checks in the previous steps is not correct, the sensor is probably
defective. Refer to the Honeywell warranty/replacement plan on page ii for details on sensor
replacement. If the resistance checks are correct, the sensor may still be defective. In this case,
more extensive troubleshooting is required. Please consult the Honeywell Customer Service
Department for details.
5.3
Customer Assistance
If you need spare parts, assistance in troubleshooting, or repair servicing, please contact your local
Honeywell representative or Technical Support. See front section of this manual for contact information.
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Series 5000TC Toroidal (electrodeless) Conductivity Sensors - Operation and Maintenance
5. Troubleshooting
Table 5-1 Sensor Troubleshooting Procedure
Action
Troubleshooting
23
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