Hanna Instruments HI 504920, Инструкция по эксплуатации, Страница: 11 / 15

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When the batteries are inserted and no power adapter is connected,
the meter can recognize two different batteries charge levels.
1.
Weak batteries - "bAt" indication
is displayed on the secondary LCD
alternating the temperature read-
ing. The meter can still work for
about 10 hours.
2. Dead batteries - meter shuts off
and stops working to avoid errone-
ous readings.
Battery replacement must only take place
in a non hazardous area using 1.5V
alkaline AA type batteries.
In order to replace rundown batteries,
simply remove the two screws of the rear
cover and replace the four 1.5V AA
batteries with new ones, while paying
attention to the correct polarity.
A 12 VDC power adapter can also be used to power the unit (see
accessories).
Note: The instrument uses the following configuration.
It is recommended to purchase the Hanna voltage adapters that use
the proper polarity configuration.
However,
HI 504920 can be used also with other adapters. In this
case, check the correct polarity of the adapter before connecting it to
the meter.
+
-
BATTERY REPLACEMENT
• The LCD will then display the last pH calibration date.
• Press DISPLAY to scan remaining data, in the following order:
last calibration time;
electrode offset value in mV ("OFF" appears on the secondary LCD);
electrode slope in mV/pH ("SLP" appears on the secondary LCD);
first calibration point buffer;
second calibration point buffer (only if a 2-point calibration has
been performed).
If calibration was performed with an old or dead probe, the
message "old probe" or "dead probe" will scroll on LCD.
• The meter then returns to normal mode. Press (ALT+) CAL DATA
to escape before viewing all the data.
To view the mV calibration data
• Press (ALT+) CAL DATA when the meter displays mV reading.
• The LCD will then display the last mV calibration date.
• Press DISPLAY to scan remaining data, in the following order:
last calibration time;
first calibration point;
second calibration point;
third calibration point (only if a 3-point calibration has been
performed).
• The meter then returns to normal mode. Press (ALT+) CAL DATA
to escape before viewing all the data.