Hanna Instruments hi 931700 Benutzerhandbuch

19

18

Remove the protective cap.

DO NOT BE ALARMED IF ANY SALT DE-
POSITS ARE PRESENT.

This is normal with electrodes and they will
disappear when rinsed with water.

During transport tiny bubbles of air may have
formed inside the glass bulb. The electrode

Reference
Filling Hole

Reference
Filling Hole

Fill Hole
Screw

Sensitive

Wire

Reference

Wire

Reference

Junction

Glass

Bulb

Glass
Bulb

Reference
Junction

Reference
Junction

Reference

Junction

Platinum or
Gold tip

Platinum or

Gold tip

Reference
Wire

Reference
Wire

Sensitive
Wire

Glass Body

pH Electrode

Plastic Body

pH Electrode

Plastic Body

ORP Electrode

Glass Body

ORP Electrode

Reference

Wire

In the event that measurements are per-
formed with solutions containing sulfides or
proteins, the cleaning of the diaphragm of
the reference electrode must be performed
(see page 21, "Cleaning Procedure").

In order to have a correct functioning of the
ORP electrode, immerse it into HI 7020 and
measure the response; the obtained value
should be within 200 and 275 mV.

After this functional test, it is suggested to
wash the electrode thoroughly with water
and proceed to the oxidizing or reducing
pre-treatment before taking measurements.

When not in use, the electrode tip should be
kept moist and far from any type of me-
chanical stress which might cause damage.
For this reason , the use of the protective
cap supplied with the electrode is advised.