User Guide

Instruction Manual Lead Electrode

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 re-dipping electrode

electrodes not put electrodes in solution

in solution

Noisy or defective meter check meter with shorting strap

Unstable Readings

(readings air bubble on membrane remove bubble by re-dipping electrode

continuously

or rapidly changing) electrode exposed soak electrode in lead 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 at different temperatures temperature before measurement

changing in one

direction) complexing agents check section entitled

in sample Precipitation and Complexation

incorrect reference use recommended

filling solution filling solution

membrane dirty polish membrane; use

or oxidized methanol-formal dehyde solution