EUTECH INSTRUMENTS ?lpha-pH500 Dokumentacja Pobierz pdf (Strona 26)

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8 TROUBLE SH OOTING GUIDE

Problem

Cause

Solution

Power on but no

display

a). Loose connections

b). Cables not in correct

polarity (+ and – position).

a). Check cables are making good

contact.

b). Re-wire loop cables with

correct polarity.

Unstable readings

a). Air bubbles in probe.

b). Dirty probe.

c). Probe not deep enough in

sample.

d). External noise pickup or

induction caused by nearby

electric motor.

e). Severe Reference junction

fouling.

a). Tap probe to remove bubbles.

b). Clean the probe and re-

calibrate.

c). Make sure sample entirely

covers the probe sensors.

d). Switch to Symmetrical mode

and connect PMP.

e). Replace probe.

Slow response

a). Dirty / Oily probe.

a). Clean probe. See “Probe Care

& Maintenance”, Section 7.

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