User Guide

37
TROUBLESHOOTING GUIDE
Symptoms Problem Solution
Defective ATC
probe
Defective pH
electrode
The electrode is
not working or
the reference
junction is
clogged
Defective pH
electrode
Defective pH
electrode
Out of range-pH
scale
Out of range-°C
scale or probe
not connected
Out of range-mV
scale
Erroneous
buffer solution
used for offset
calibration
Defective
electrode
Erroneous
buffer solution
used for 1
st
slope calibration
Defective
electrode
Replace the probe
Replace the electrode
Leave the electrode in
a storage solution after
cleaning the junction. If
problem persists,
replace the electrode
Follow the cleaning
procedure. If this
doesn't work replace
the electrode
Replace the electrode
a) Check the calibration
b) Assure the pH sample
is in the range 0 to 14
c) Check the level of
electrolyte and the
state of the electrode
itself
Make sure the °C is within
0-100° and temperature
probe is plugged
Electrode not connected
Make sure the buffer
solution used is pH7 and
replace if necessary
Replace the electrode
Use fresh buffer solution
Replace the electrode
The meter does
not work with the
temperature probe
The meter fails to
calibrate or gives
faulty readings
The meter is slow
in responding or
gives faulty
readouts
The meter does
not accept the 2
nd
buffer solution for
calibration
The reading drifts
Display reads
"--.--" in the pH
mode
Display reads "°C"
blinking
Display reads "E3"
"--.--" in the mV
mode
"WRONG
1
BUF
"
and/or
"WRONG "
"WRONG
2
BUF
"
and/or
"WRONG "