TPS MC-81 - Warranty

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pH and mV Troubleshooting, continued...
Inaccurate readings,
even when
calibration is
successful.
Reference junction blocked. Clean reference junction, as per
instructions supplied with the
electrode.
Displays 7.00 for
all solutions.
Electrical short in connector. 1. Check connector. Replace
if necessary.
2. Replace electrode.
Displays 4-5 pH for
all solutions.
Glass bulb or internal stem
cracked.
Replace electrode.
10.4 Temperature Troubleshooting
Symptom Possible Causes Remedy
Displays “Man” in
pH/Temperature
mode and
Temperature mode
when conductivity
sensor is connected.
1. Faulty temperature sensor
in conductivity sensor.
Fit new conductivity sensor.
NOTE: Conductivity readout
may still be accurate.
Displays “OVR
o
C”
in Conductivity/
Temp. and Salinity/
Temp. modes when
conductivity sensor
is connected.
1. Faulty temperature sensor
in conductivity sensor.
2. Faulty instrument.
Fit new conductivity sensor.
NOTE: Conductivity readout
may still be accurate.
Return instrument to factory
for repair.
Temperature
inaccurate and
cannot be
calibrated.
1. Faulty connector.
2. Faulty temperature sensor
in conductivity sensor.
3. Faulty instrument.
Check the connector and
replace if necessary.
Fit new conductivity sensor.
NOTE: Conductivity readout
may still be accurate.
Return instrument to factory
for repair.