Hanna Instruments HI 98280 User Manual

Page 11

Cigarette lighter supply

To charge batteries from a vehicle cigarette lighter supply, use HI710046

HI710046

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.

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

HI9828

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 HI70300

HI70300

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.