Thermo Fisher Scientific Ion Selective Electrodes Chloride - Manual (Page 19)

Instruction Manual Chloride Electrode
TROUBLESHOOTING HINTS
Symptom Possible Causes
Next Step
Out of Range defective meter check meter with shorting
Reading strap (see meter
instruction manual)
defective electrode check electrode operation
electrodes not plug electrode into position
plugged in properly and reset meter
reference electrode clean junction
junction clogged
static
electricity wipe plastic meter face with
detergent solution
meter
or stirrer ground meter or stirrer
not grounded
Noisy or Unstable defective meter
check meter with
Readings (readings shorting strap
continuously or
rapidly changing) air bubble on membrane
remove bubble by
re-dipping electrode
ISA not used use recommended ISA
meter or stirrer ground meter or
not grounded stirrer
defective electrode replace electrode
electrode exposed soak electrode in
to interferences chloride standard
Drift (reading
samples and standards allow solutions to come to
slowly changing at different temperatures room temperature before
in one direction) measurement
incorrect reference
use recommended
filling solution filling solution in outer
of reference electrode
membrane dirty or etched polish membrane
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