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BluelabComboMeterV02/Troubleshooting/Version 1:00918_0412
Trouble Reason Correction
Nutrient reading low
Contaminated conductivity/
temperature probe.
Clean conductivity/temperature probe.
Solution temperature low/
high.
Wait 5 to 10 minutes for reading to
stabilize to a constant value.
Temperature reading
inaccurate
Temperature of conductivity/
temperature probe different
to solution temperature.
Wait 5 to 10 minutes for conductivity/
temperature probe to reach solution
temperature.
pH reading inaccurate
Contaminated pH probe. Clean pH probe.
Incorrect calibration.
Ensure calibration solutions are accurate.
Replace if in doubt.
Wait longer for readings to stabilize
before calibrating to a constant value.
Calibration unreliable. Calibrate pH probe
pH probe damaged or old. Replace pH probe.
pH reading does not
change from solution
to solution
Broken glass bulb, tube or
connector.
Check pH probe for damage.
Replace pH probe.
Displays low
battery indicator
Insufficient power to take a
reliable reading.
Replace the batteries.
DO NOT use rechargeable batteries.
No display
Batteries dead or inserted
incorrectly.
Check batteries are inserted correctly.
Replace if necessary.
Display shows ‘Err’
Problem with pH calibration.
See error message descriptions in
section 10 of the Bluelab Combo Meter
Manual.
Or
Ur
While in pH mode
Over range pH.
Under range pH.
Solution > 14.0 pH.
Solution < 0.0 pH.
Check pH probe connection.
pH probe could be faulty.
Combo Meter could be wet inside.
Or
Ur
While in temp mode
Over range temperature.
Under range temperature.
Solution >51 °C / 122 °F.
Solution <0 °C / 32 °F.
Conductivity/temperature probe
or Combo Meter faulty.
Or
While in conductivity/
nutrient mode
Over range conductivity/
nutrient.
Over range conductivity
>9.9 EC, 99 CF, 4950 ppm 500, 6930
ppm 700.
Conductivity/temperature probe or Combo
Meter faulty.
Troubleshooting