Operational Guide - Hanna Instruments HI 9812 Instruction Manual

OPERATIONAL GUIDE

OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied complete with a 9V battery. Slide off the
battery compartment cover on the back of the meter (see page 18),
install the battery while paying attention to its polarity.
Connect the probe to the DIN socket on the
top of the meter by aligning the pins with
the socket and pushing in the plug.
Always remove the electrode protective cap before taking any mea-
surements.
Make sure the meter has been calibrated before taking any measure-
ments (see pages 10 and 11 for calibration
procedures).
Turn the meter on by pressing the ON/OFF key.
TAKING PH MEASUREMENTS
If the electrode has been left dry, soak the tip in a pH 7 or pH 4
buffer solution for a few minutes to reactivate it.
• To take a pH measurement simply submerge the tip
(4cm/1½") of the combination pH/EC/TDS electrode
into the sample to be tested.
• Select the pH mode .
• Shake the electrode briefly while submerged
and allow a couple of minutes for the
electrode to adjust and stabilize. The dis-
play will show the pH value.
• If measurements are taken in different samples successively, it is
recommended to rinse (clean) the electrode thoroughly to elimi-
nate cross-contamination. After cleaning, it is recommended to
rinse the electrode with some of the sample to be measured.
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