Hanna-instruments HI 98280 Manual do Utilizador descarregar pdf (Página 11)

Cigarette lighter supply

To charge batteries from a vehicle cigarette lighter supply, use

HI710046HI710046

HI710046 cable.

• Simply connect the cable to the meter and to the cigarette lighter plug.

• The message “Battery charging in progress” will appear on the display, fol-

lowed by the battery symbol.

• A complete battery charging will last about 14 hours.

NoteNote

Note Batteries can also be charged with the meter ON; if the auto-off fea-

ture is enabled, the meter turns off automatically after the set time.

1.5 PROBE DESCRIPTION & INSTALLATION

HI9828HI9828

HI9828 is supplied with a multisensor probe for dissolved oxygen, temperature,

conductivity, pH and redox measurements.

1.5.1 Sensor Description

The galvanic DO sensor allows to obtain stable readings in

a few seconds. The thin permeable membrane isolates the

sensor elements from the testing solution, but allows oxygen

to enter. Oxygen that passes through the membrane causes

a current flow, from which the oxygen concentration is de-

termined. Before installing the probe, it is necessary to acti-

vate the DO sensor; see paragraph 1.5.3 for details.

The conductivity sensor uses the 4-ring technology that al-

lows stable and linear readings without any interference in

the whole range.

The pH/ORP sensor features a glass membrane for pH read-

ings and a Pt sensor for redox measurements.

To avoid clogging problems and ensure a fast response, the

pH bulb must be kept moist at any time. Store the electrode

with a few drops of

HI70300HI70300

HI70300 storage solution in the pro-

tective cap.

The EC sensor also works as matching pin

and must be always mounted to have cor-

rect pH readings.

For correct redox measurements, the surface of the elec-

trode must be clean and smooth, and a pretreatment pro-

cedure should be performed to ensure quick response.

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Hanna-instruments HI 98280 Manual do Utilizador Página 11