7
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 probe protective cap before taking any measurements
or calibrating, and stir briefly the electrode in tap water to remove the
storage solution. Make sure the meter has been calibrated.
Turn the meter on by pressing the
On/Off
key.
TAKING pH MEASUREMENTS
If the probe has been left dry, soak the tip in
HI70300
storage solution
for 30 minutes to reactivate it.
• To take a pH measurement simply
submerge the tip (4 cm/ 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.
OPERATIONAL GUIDE