7.
Troubleshooting
Fault: Initial AUTO TEST:
Resistivity is not 15 Megohm x cm ± 1 Megohm x cm
When the OPERATE/STANDBY button is first pressed, the unit carries
out an internal check on the accuracy of its resistivity monitoring
system.
The display should show 15 Megohm x cm (+ 1 Megohm x cm) for 4
seconds).
If the value by test is less than 14 Megohm x cm or more than
16 Megohm x cm, then the display will show TEST INCORRECT for 2
seconds.
Then actual resistivity in the system for 4 seconds.
This sequence of TEST INCORRECT/ACTUAL RESISTIVITY is repeated.
This fault may be due to a problem of calibration of temperature
or resistivity.
To Check Test Temperature Calibration
. Put system in STANDBY mode.
. Press TEMPERATURE button - display test temperature.
. The test temperature is 25° C.
. If the display shows anything other than 25° C then
you will need to recalibrate the temperature setting.
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