Hanna Instruments HI 9828, Инструкция по эксплуатации

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Cigarette lighter supply
With HI 710046 it is possible to recharge HI 9828 with a car.
It is sufficient to connect the cable to the meter and to the Cigarette lighter of car.
• On display the message “Battery charging in progress” appears and then the
battery icon.
• For complete batteries recharging 14 hours are necessary.
NOTE: It is possible to recharge batteries with the meter ON; if Auto shut-off
feature is enabled, the meter will switch off automatically when the fixed
time is expired.
1.5 PROBE DESCRIPTION & INSTALLATION
HI 9828 is supplied with HI 769828DO, probe for Dissolved
Oxygen, Temperature and Conductivity measurents.
In the probe body it is also possible to insert a pH or pH/
ORP sensor; please see Appendix A for the order codes.
The galvanic D.O. sensor with the built-in thermistor allow
to have stable temperature compensated readings in few
seconds. The thin permeable membrane isolates the sensor
elements from the testing solution, but allows oxygen to en-
ter. Oxygen that passes through the membrane causes a
current flow, from which the oxygen concentration is deter-
mined.
Before installing the probe, it is necessary to activate the D.O.
sensor; see paragraph 1.5.1 for procedure.
The concuctivity sensor is a 4 rings system that allows stable
and linear readings without interferences in all the range.
1.5.1 D.O. sensor activation
The D.O. probe is shipped dry. To hydrate the probe and prepare it for use pro-
ceed as follows:
• Remove the black & red plastic cap. This cap is used for shipping purposes
only and can be thrown away.