Troubleshooting And Repair; Troubleshooting List - Waltron 9065C Instruction Manual

7 TROUBLESHOOTING AND REPAIR

TROUBLESHOOTING LIST

7.1
Problem
Nothing is displayed on the
screen when a button is
pressed.
The temperature
measurement gives HHH or
LLL.
Error message
Battery voltage too low.
Measurement aborted.
Charging voltage too high.
Check adaptor.
A measurement is not possible
during charging of the battery.
Questionable calibration.
Old calibration restored.
O sensor - calibrate or replace
2
symbol
O
2
on the display
O sensor values are unstable.
2
O value is outside
2
measurement range.
Waltron User Manual
9065C Portable Luminescent Dissolved Oxygen Analyzer
Cause
The batteries are discharged.
The measurement value is
outside of the measurement
range. LLL indicates the value
is too low. HHH indicates that
the value is too high.
Cause
The battery is discharged.
The power supply has the
wrong voltage.
For safety reasons, you cannot
carry out any O
2
measurements whilst the
battery pack is being charged.
The difference between the
measured oxygen signal at the
zero point and at the high
calibration point is too small.
The maximum number of
exposures has been reached
and the oxygen sensor
deviation at the zero point is 5
ppb.
The set oxygen content was
not stable during the
calibration.
You are trying to calibrate the
sensor at an oxygen
concentration level that is in
excess of its measurement
range.
The oxygen sensor
measurement signal is
unstable.
The measured oxygen content
is too high or too low.
Troubleshooting and Repair
Solution
Recharge the battery pack.
The electronic connection to the main
electronics has been broken. Contact your
local representative or Waltron.
Solution
Charge the battery.
Check the power supply.
Charge the battery pack and then disconnect
the power supply.
Check if gases with different O
concentrations are being used during the
calibration. Use a calibration gas with a higher
O content.
2
Calibrate or replace the oxygen sensor.
Recalibrate this calibration point and make
sure the oxygen value is stable before carrying
out the calibration.
Use a calibration gas that lies within the
oxygen sensor's measurement range.
Contact your local representative or Waltron.
Check whether you are measuring within the
sensor's measurement range. If you are within
the measurement range, recalibrate the oxygen
sensor.
2
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