Hanna Instruments HI 98710 - Manual (Page 3)

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FUNCTIONAL DESCRIPTION
1) Power adapter plug
2) Temperature probe connectors (1 or 4, depending on model)
3) Liquid Crystal Display
4) PAPER key, to move the paper up
5) ON/OFF key, to turn the meter on or off
6) ALT key, to activate alternate key function
7) CH/TIME key (HI 98740 and HI 98840), to select input chan-
nels, view date & time, and (with ALT) enable backlight;
TEMP/TIME key (HI 98710 and HI 98810), to select tempera-
ture reading, view date & time, and (with ALT) enable backlight
8) LOG key, to store and/or print measurements
9)
LOT INFO key (HI 98810 and HI 98840), to move down or
(with ALT) view logging information;
key (HI 98710 and HI 98740), to move down
10) CFM key, to move right or (with ALT) confirm values
11) FNC key, to move up or (with ALT) select function codes
The log-on-demand function is activated by simply pressing one but-
ton, while for automatic logging, the user can select a time interval
from 1 to 180 minutes.
All logged data can be transferred to a PC by placing the instrument
on the HI 9200 infrared interface, connected to the computer serial
port. The connection is handled with the HI 92000 Windows
® com-
patible software from HANNA instruments ® .
HI 98810 accepts one temperature probe while HI 98840 can be
connected to 4 separate probes at the same time.
All models use the HI 762 series of thermistor probes by HANNA
instruments
® , and can be powered with batteries or with a 12 Vdc
supply.
To prolong battery life, the backlight and printing features are dis-
abled when the batteries are getting low; the "LOBAT" indication is
displayed on LCD to warn the user. However, the meter continues to
measure correctly even when the low battery indication is displayed.
The meter automatically switches itself off when the batteries are too
weak to support proper function.
The meters are equipped with an internal lithium battery that pow-
ers the clock circuit even in the absence of power supplies.
For long term field and lab applications, these meters can be connected
to a 12 Vdc adapter.
Each meter can also be uniquely identified by the user by assigning
an ID code.