Thermo Fisher Scientific Ion Selective Electrodes Cadmium - Manual (Page 18)

Cadmium Electrode Instruction Manual
18
TROUBLESHOOTING HINTS
Symptom
Possible Causes Next Step
Out of Range defective meter check meter with
Reading shorting strap
(see meter instruction manual)
defective electrode check electrode operation
electrodes not unplug electrodes
plugged in properly and reset
reference electrode be sure reference
not filled electrode is filled
air bubble on remove bubble by
membrane redipping electrode
electrodes not put electrodes
in solution in solution
Noisy or Unstable
defective meter check meter with
Readings (readings shorting strap
continuously or
rapidly changing)
air bubble on remove bubble by
membrane re-dipping electrode
electrode exposed soak electrode in
to interferences cadmium standard
defective electrode replace electrode
ISA not used use recommended ISA
meter or stirrer ground meter or
not grounded stirrer
Drift (reading
samples and standards allow solutions to come
slowly changing at different to room temperature
in one direction) temperatures before measurement
electrode exposed check section
to complexing agents entitled
Precipitation
and Complexation