eutech-instruments iodide epoxy User Manual

Instruction Manual

Iodide Electrode

15

TROUBLESHOOTING HINTS

Symptom Possible Causes

Next Step

Out of Range defective meter

check meter with shorting strap

Reading

(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 redipping

electrode

electrodes not

put electrodes in solution

in solution

Noisy or Unstable

defective meter

check meter with shorting strap

Readings (readings
continuously or

air bubble on membrane

remove bubble by re-dipping electrode

rapidly changing)

electrode exposed

soak electrode in iodide standard

to interferences

defective electrode

replace electrode

ISA not used

use recommended ISA

meter or stirrer

ground meter or stirrer

not grounded

Drift (reading

samples and standards

allow solutions to come to room

slowly changing at different temperatures

temperature before measurement

in one direction)

electrode exposed

check section entitled

to complexing agents

Complexation

incorrect reference

use recommended

filling solution

filling solution

Low Slope or

standards contaminated

prepare fresh standards

No Slope

or incorrectly made

ISA not used

use recommended ISA