Hanna Instruments HI 9811 - Manual (Page 6)

6
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 observing 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
measurements 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 30 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.
O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E O P E R A T I O N A L G U I D E