Chapter 8 Troubleshooting - Thermo Scientific Alpha pH 560 Manual

Thermo Scientific Alpha pH 560
1.800.561.8187
Chapter 8
Troubleshooting
Cause
Problem
Power on, but a) Loose connections
no display
b) Incorrect output
Unstable pH a) Dirty electrode
reading
b) Electrical noise
Oscillating a) Electrical noise
temperature
readings
Slow response a) Dirty / Oily
electrode
Blinking ATC a) No temperature
Blinking a) Error in calibration
electrode
annunciator
Or (pH) a) pH electrode is not
Or a) Temperature probe
(Temperature)
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Solution
a) Ensure cables make
good contact
voltage of the b) Use an power
power adaptor adaptor with
specified output
voltage
a) Clean electrode and
recalibrate
interference b) Switch to Symmetric
mode
a) Ensure shield wire is
interference properly connected
to pin 7
a) Clean electrode
a) Ensure temperature
probe connection sensing cable makes
during ATC mode good contact
a) Ensure calibration
standard solution is
not contaminated.
Ensure electrode is
clean.
a) Ensure electrode
connected makes good contact
with Transmitter
a) Ensure electrode
is not connected makes good contact
when ATC enabled with Transmitter
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