Instruction manual

TROUBLESHOOTING HINTS

Symptom Possible Causes Next Step

Out of Range defective meter perform meter checkout procedure

Reading (see meter instruction manual)

defective inner body refer to

Checking the Electrode

Inner Body

electrode not unplug electrode and reset

plugged in properly

internal filling fill outer body of electrode with proper

solution not added amount of internal filling solution

air bubble on membrane remove bubble by re-dipping

electrode

electrode not in solution put electrode in solution

Noisy or Unstable insufficient fill outer body of electrode with proper

Reading (readings internal filling solution amount of internal filling solution

continuously or

randomly changing.) defective meter perform meter checkout procedure

(see meter instruction manual)

bottom cap loose ensure that bottom cap is screwed on

tight enough to close gap between

bottom cap and body

defective inner body refer to

Checking the Electrode

Inner Body

air bubbles on membrane remove bubbles by redipping electrode

meter or stirrer check meter and stirrer for

improperly grounded grounding

Drift (reading slowly internal filling ensure that membrane is installed

changing in one solution leakage properly

incorrect internal refill outer body of electrode using

filling solution filling solution shipped with electrode

total sample level dilute sample of dissolved species

above 1M

electrode in sample reduce surface area to volume ratio,

too long; NH

loss slow down rate of stirring, avoid