Hanna Instruments electrodes Manuel D’Utilisation

PLASTIC BODY

pH ELECTRODE

GLASS BODY

pH ELECTRODE

Fill Hole

Screw

Reference

Fill Hole

Sensitive

Wire

Reference

Wire

Feel Hole

Sleeve Cover

Sensitive

Wire

Reference

Fill Hole

Reference

Fill Hole

Reference

Wire

Reference

Junction

Reference

Junction

Glass Bulb

Glass Bulb

Reference

Wire

Reference

Wire

Sensitive

Wire

Sensitive

Wire

Reference

Junction

Reference

Junction

Platinum or

Gold tip

Platinum or

Gold tip

PLASTIC BODY

ORP ELECTRODE

GLASS BODY

ORP ELECTRODE

Inspect the electrode for any scratches or cracks. If any present,
replace the electrode.

Rinse off any salt deposits with water.

Drain the reference chamber with a syringe and refill it with fresh
electrolyte (HI7071 for single junction or HI7082 for double junction
electrodes). Allow the electrode to stand upright for 1 hour.

Follow the Storage Procedure above.

General - Soak in Hanna Solution HI7061 for approximately 1
h o u r .

Removal of films, dirt or deposits on the membrane/junction:
- 

Protein - Soak in Hanna Solution HI7073 for 15 minutes.

- 

Inorganic - Soak in Hanna Solution HI7074 for 15 minutes.

- 

Oil and grease - Rinse with Hanna Solution HI7077.

IMPORTANT: After performing any of the cleaning procedures rinse
the electrode thoroughly with distilled water, drain and refill the refer-
ence chamber with fresh electrolyte, (not necessary for GEL filled
electrodes) and soak the electrode in HI70300 Storage Solution for at
least 1 hour before taking measurements.

pH Meter: Follow attentively the meter's operating and calibration
procedures from the instruction manual.

Electrode: Evaluate your electrode performance based on the follow-
ing possibilities.

Noise (Readings fluctuate up and down) could be due to:
- Clogged/Dirty Junction: Refer to Cleaning Procedure above.
- Loss of shielding due to low electrolyte level (in refillable elec-
trodes only): Empty electrolyte with a syringe and refill with fresh
HI7071 for single junction or HI7082 for double junction electrodes.

Dry Membrane/Junction: Soak in Storage Solution HI70300 for at
least 1 hour.

Drifting: Soak the electrode tip in warm Hanna Solution HI7082 for
one hour then flush tip with distilled water. Refill with fresh HI7071
for single junction electrodes and HI7082 for double junction elec-
trodes.

Low Slope: Refer to Cleaning Procedure above.

No Slope: Check electrode for cracks in glass stem or bulb and
replace the electrode.

Slow Response/Excessive Drift: Soak the tip in Hanna Solution
HI7061 for 30 minutes, rinse thoroughly in distilled water and then
follow Cleaning Procedure above.

HI70300 / HI80300 Storage Solution (230 or 460 mL)
HI7061 / HI8061

General Cleaning Solution (230 or 460 mL)

 Protein Cleaning Solution (230 or 460 mL)

Inorganic Cleaning Solution (230 or 460 mL)

Oil and Fat Cleaning Solution (230 or 460 mL)

3,5M KCl + AgCl Electrolyte Solution, 4X50 mL

1M KNO

3 

Electrolyte Solution, 4X50 mL

3,5M KCl Electrolyte Solution, 4X50 mL

1M KCl + AgCl Electrolyte Solution, 4X50 mL

Check with your nearest Hanna Dealer for more information.

Remove the protective cap. DO NOT BE ALARMED IF ANY SALT
DEPOSITS ARE PRESENT. This is normal with electrodes and
they will disappear when rinsed with water.

Shake the electrode down as
you would do with a clinical ther-
mometer to eliminate any air
bubbles inside the glass bulb.

If the bulb and/or junction are
dry, soak the electrode in
HI70300 Storage Solution for at
least one hour.

If  the fill solution (electrolyte) is
less than 1 cm (½") below the fill
hole, add HI7082 for double junc-
tion or HI7071 for single junction
electrodes.

For a faster response lower the
rubber sleeve (or unscrew the fill
hole screw).

If the wires are extended, they
should not touch (short cir-
cuited). Maximum recom-
mended length  is 15 m (50'), however cables can be extended.

If the electrode does not respond to pH changes, the battery is run
down and the electrode should be replaced.

With Process Instrumentation connect the blue wire to the glass
terminal and the white wire to the reference terminal of the meter.

With electrodes terminating in spade lugs, make sure the lugs do not
touch each other otherwise the battery life will be drastically reduced.

Rinse the electrode tip with distilled water.

Immerse the tip in the sample and stir gently for approx. 30 seconds.

For a faster response and to avoid cross contamination of the
samples, rinse the electrode tip with a few drops of the solution to be
tested, before taking measurements.

To minimize clogging and ensure a quick response time, the glass
bulb and the junction should be kept moist and not allowed to dry out.

Replace solution in the protective cap with a few drops of HI70300
Storage Solution or, in its absence, Filling Solution (HI7071 for
single junction or HI7082 for double junction electrodes). If none of
the above is available, tap water may also be used for a very short
period  (couple of days). Follow Preparation above before taking
measurements.

Note: NEVER STORE THE ELECTRODE IN DISTILLED WATER.

 IstrElec 05/95