Operational Guide - Hanna Instruments HI 9811-5 Instruction Manual

OPERATIONAL GUIDE

INITIAL PREPARATION
Each meter is supplied complete with a 9V battery. Remove the
battery compartment cover on the back of the meter and 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 and make sure the meter has been calibrated before
taking any measurements.
Turn the meter on by pressing the ON/OFF key.
TAKING pH MEASUREMENTS
If the probe has been left dry, soak the tip in HI 70300 storage
solution for a few minutes to reactivate it.
• To take a pH measurement simply submerge the
tip (4cm/1½") of the probe into the sample to
be tested.
• Select the pH mode.
• Stir briefly and wait a couple of
minutes for the reading to adjust
and stabilize. The display shows
the pH value.
• If measurements are taken in different samples successively, it is
recommended to rinse (clean) the probe thoroughly to eliminate
cross-contamination. After cleaning, it is recommended to rinse
the probe with some of the next sample to be measured.
TAKING EC/TDS MEASUREMENTS
• Immerse the tip of the probe (4cm/1½") into the
sample to be tested. If possible, use plastic beakers
or containers to minimize any EMC interference.
• Tap the probe lightly on the bottom of the
beaker to remove any air bubbles which may be
trapped inside the tip.
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• Select the appropriate measurement range (EC or TDS).
• Wait a couple of minutes for the temperature sensor to reach
thermal equilibrium. The display will then show the measurement
automatically temperature compensated for temperature with the
appropriate indication among the following:
"µS" symbol indicates the meter is
in EC mode;
no symbol indicates the meter is in
TDS mode.
TAKING TEMPERATURE MEASUREMENTS
(for HI 9811-5 only)
• Submerge the tip (4cm/1½") of the
probe into the sample to be tested.
• Select the °C mode.
• Stir briefly and wait a couple of
minutes for the reading to adjust
and stabilize. The display shows the
temperature value.
Note: If the display shows only a "1"
on the far left hand side, the
reading is out of range.
Note: It is recommended to clean often the probe with HI 700661
Cleaning Solution.
Note: After measurements have been completed, the instrument
should be switched off, and the probe cleaned and covered
with the protective cap.
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