Thermo Fisher Scientific Ion Selective Electrodes Copper - Manual (Page 23)

23
Try to determine the composition of the samples prior to testing
to eliminate a problem before it starts. See Measuring Hints,
Sample Requirements
, and Interferences.
Technique
Be sure that the electrode's limit of detection has not been
exceeded.
Be sure that the analysis method is clearly understood and that
Good Laboratory Practice has been followed.
Refer to the instruction manual again. Read GENERAL PREPARATION
and ELECTRODE CHARACTERISTICS.
TROUBLESHOOTING HINTS
Symptom
Possible Causes Next Step
Out of Range
defective meter check meter with
Reading shorting strap
(see meter
instruction manual)
defective
check electrode
electrode operation
electrode(s) not unplug electrode(s)
plugged in properly and reset
reference electrode be sure reference
not filled electrode is filled
air bubble on remove bubble by
membrane redipping electrode
electrode(s) not put electrode(s)