Hanna-instruments HI 84529 Manual de usuario descargar pdf (Pagina 46)

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46

Maintenance

Symptoms Problem Solution

Slow response/excessive

drift.

Dirty pH or reference

electrode.

Soak the electrode tip HI 70640

solution for 30 minutes and

follow the cleaning procedure.

Rell reference electrode with

new ll solution.

Reading uctuates up and

down (noise).

Clogged/dirty junction.

Low electrolyte level

(reference electrode).

Cable connection.

Clean the pH electrode. Rell

reference electrode with fresh ll

solution. Check cable connection

to meter and verify protective

cap is o.

While in pH reading mode,

-2.00 or 16.00 pH is displayed

blinking.

Reading out of range.

Check cable connection to meter

and verify protective cap is o.

Check the quality of the sample.

Clean the electrodes. Rell with

fresh ll solution.

The meter does not accept

the pH buer solution for

calibration.

Broken pH or reference

electrode.

Follow the electrode cleaning

procedure. If the error persists

replace the electrode or contact

your local Hanna Representative.

The pump calibration can't be

performed.

Broken pump tubing.

Wrong or contaminated

pump calibration solution.

Broken pH electrodes.

Verify tubing, valve, syringe

are intact and solution passes

when pump is primed and no air

bubbles are present. Check the

pump calibration solution. Verify

electrodes are calibrated. Prepare

another standard, prime the

pump and restart the calibration.

The temperature probe is

connected, but the meter

displays "MTC".

Broken temperature

probe.

Replace temperature probe.

Troubleshooting

Guide

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