Hanna Instruments hi 9810 用户手册
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TAKING EC/TDS MEASUREMENTS
• Immerse the tip of the electrode (4cm/1½") into the
sample to be tested. If possible, use plastic beakers
or containers to minimize any EMC interference.
or containers to minimize any EMC interference.
• Tap the electrode lightly on the bottom of the
beaker to remove any air bubbles which may be
trapped inside the tip.
trapped inside the tip.
• Select the appropriate measurement range (EC or TDS).
• Wait for 1-2 minutes for the temperature sensor to attain thermal
equilibrium. The display will then show the measurement auto-
matically temperature compensated for temperature with the
appropriate indication among the following:
µS symbol indicates the meter is in
µS/cm, EC mode
- No symbol indicates the meter is in TDS
mode.
matically temperature compensated for temperature with the
appropriate indication among the following:
µS symbol indicates the meter is in
µS/cm, EC mode
- No symbol indicates the meter is in TDS
mode.
Note: If the case of an erroneous reading, the "E" indication will
appear on the right of the display.
AFTER MEASUREMENTS
After measurements have been completed, the instrument should be
switched off and the probe cleaned and covered with the protective
cap.
switched off and the probe cleaned and covered with the protective
cap.
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 16),
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 8 and 9 for calibration
procedures).
Turn the meter on by pressing the ON/OFF key.
battery compartment cover on the back of the meter (see page 16),
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 8 and 9 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.
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.
into the sample to be tested.
• Select the pH mode .
• Shake the electrode briefly while sub-
merged and allow a couple of minutes
for the electrode to adjust and stabilize.
The display will show the pH value.
for the electrode to adjust and stabilize.
The display 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.
nate cross-contamination. After cleaning, it is recommended to
rinse the electrode with some of the sample to be measured.