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8
TROUBLESHOOTING
Problem
Power on, but no display
Unstable pH reading
Oscillating temperature
readings
Slow response
Blinking ATC
Blinking electrode
annunciator
Or (pH)
Or (Temperature)
Cause
a)
Loose connections
b)
Incorrect output voltage of
the power adaptor
a)
Dirty electrode
b)
Electrical noise
interference
a)
Electrical noise
interference
a) Dirty / Oily electrode
a)
No temperature probe
connection during ATC
mode
a)
Error in calibration
a)
pH electrode is not
connected
a)
Temperature probe is not
connected when ATC
enabled
- 35 -
Solution
a)
Ensure cables make good
contact
b)
Use an power adaptor with
specified output voltage
a)
Clean electrode and
recalibrate
b)
Switch to Symmetric mode
a)
Ensure shield wire is
properly connected to pin 7
a) Clean electrode
a)
Ensure temperature sensing
cable makes good contact
a)
Ensure calibration standard
solution is not contaminated.
Ensure electrode is clean.
a)
Ensure electrode makes
good contact with
Transmitter
a)
Ensure electrode makes
good contact with
Transmitter
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