User Guide

5
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1.5V
1.5V
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1.5V
1.5V
SCREW
POTS
RESET
HI 7669/2W
TEMPERATURE
PROBE
COMBINATION
pH ELECTRODE
WITH BNC CONNECTOR
pH
ON/OFF
OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied
complete with batteries.
Remove the back cover, un-
wrap the batteries and in-
stall them while paying at-
tention to the polarity.
PROBES CONNECTION
To prepare the
instrument for
use, connect the
pH electrode to
the BNC connec-
tor located on the
top of the instru-
ment.
Connect the temperature probe to the appro-
priate connector.
The temperature probe can be used indepen-
dently to take temperature measurements, or
it can be used in conjunction with the pH
electrode to utilize the meter's ATC capabil-
ity.
If the temperature probe is
left disconnected, the meter
defaults to a temperature of
"25°C" (77°F).
To switch the meter on, press
the ON/OFF key.
To maximize battery life, the display is auto-
matically switched off after 5 minutes (for
HI 931300) or 10 minutes (for HI931301) of