Troubleshooting Hints - EUTECH INSTRUMENTS IODIDE EPOXY Instruction Manual

Instruction Manual

TROUBLESHOOTING HINTS

Symptom
Out of Range
Reading
electrode
Noisy or Unstable
Readings (readings
continuously or
rapidly changing)
Drift (reading
slowly changing
in one direction)
Low Slope or
No Slope
Possible Causes
defective meter
defective electrode
electrodes not
plugged in properly
reference electrode
not filled
air bubble on membrane
electrodes not
in solution
defective meter
air bubble on membrane
electrode exposed
to interferences
defective electrode
ISA not used
meter or stirrer
not grounded
samples and standards
at different temperatures
electrode exposed
to complexing agents
incorrect reference
filling solution
standards contaminated
or incorrectly made
ISA not used
Next Step
check meter with shorting strap
(see meter instruction manual)
check electrode operation
unplug electrodes and reset
be sure reference electrode
is filled
remove bubble by redipping
put electrodes in solution
check meter with shorting strap
remove bubble by re-dipping electrode
soak electrode in iodide standard
replace electrode
use recommended ISA
ground meter or stirrer
allow solutions to come to room
temperature before measurement
check section entitled
Complexation
use recommended
filling solution
prepare fresh standards
use recommended ISA
15
Iodide Electrode