Thermo Fisher Scientific Ion Selective Electrodes Cyanide - Manual (Page 16)

Cyanide Electrode Instruction Manual
16
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 unplug electrodes and reset
plugged in properly
reference electrode be sure reference electrode
not filled is filled
air bubble on membrane remove bubble by
re-dipping electrode
electrodes not in solution put electrodes in solution
Noisy or Unstable defective meter
check meter with shorting
Readings (readings strap
continuously or
rapidly changing) air bubble on membrane
remove bubble by
re-dipping electrode
electrode exposed soak electrode in
to interferences cyanide standard
ISA not used use recommended ISA
meter or stirrer not ground meter or stirrer
grounded
defective electrode replace electrode
Drift (reading
samples and standards allow solutions to come to
slowly changing at different room temperature before
in one direction) temperatures measurement
electrode exposed check section entitled
to complexing agents
Complexation
incorrect reference use recommended
filling solution filling solution