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pH and mV Troubleshooting, continued…
Unstable readings.
1.
Reference junction blocked.
2.
Glass bulb not clean.
3.
Bubble in glass bulb.
4.
Faulty connection to meter.
5.
Reference junction not
immersed.
6.
KCl crystals around
reference junction, inside
the electrolyte chamber.
Clean reference junction as per
instructions supplied with the
sensor.
Clean glass bulb as per
instructions supplied with the
sensor.
Flick the sensor to remove
bubble.
Check connectors. Replace if
necessary.
Ensure that the bulb AND the
reference junction are fully
immersed.
Rinse electrolyte chamber with
warm distilled water until
dissolved.
6.2 Temperature Troubleshooting
Symptom Possible
Causes
Remedy
Meter reads
“
-1
” in
Temperature mode.
Temperature sensor is
connected, but is faulty.
Check the temperature sensor
connector and replace if
necessary.
Replace temperature sensor
(part no 121245) if problem
persists.
Temperature
readings do not vary
and
Manual Temp
control is active
when temperature
sensor is plugged in.
1.
Faulty connector.
2.
Incorrect temperature
sensor.
3.
Faulty temperature sensor.
Check the connector and
replace if necessary.
Fit new temperature sensor, part
number 121245.
Fit new temperature sensor, part
number 121245.
Temperature
inaccurate and
cannot be
calibrated.
1.
Faulty connector.
2.
Faulty temperature sensor.
Check the connector and
replace if necessary.
Fit new temperature sensor, part
number 121245.
