6
OPERATIONAL GUIDE
INITIAL PREPARATION
The instrument is supplied complete with batteries. For placing the
batteries inside the meter, see page 14.
To prepare the instrument for use, connect the Fluoride and the
reference electrodes to the input sockets on the top of the instrument.
Connect the temperature probe to the temperature socket too. The
temperature probe is used in conjunction with the F
+
electrode for F
+
temperature compensation, but it can also be used independently to
take temperature measurements. If the probe is disconnected, 25.0
°C (72.0 °F) is displayed with °C or °F symbol blinking.
Turn the instrument ON by pressing
On/Off
.
At start-up the display will show all
the used segments for a few seconds (or
while the button is held), followed
by the percentage indication of the
remaining battery life. The meter is
now ready to operate.
After measurement switch the instrument off, and remove the electrodes.
Rinse the
HI 4010
electrode with deionized water, dry it with a non
abrasive cloth, and store it dry. The
HI 5313
reference electrode should
be kept wet. After use, rinse it with deionized water, and store it with
a few drops of
HI 7082
solution in the protective cap.
The auto-off feature turns the instrument off after a set period
(default 20 min) to save battery life. To set another period or to
disable this feature, see SETUP menu on page 11.
MEASUREMENT OF FLUORIDE ION CONCENTRATION
Ensure the meter is calibrated prior to proceeding any further. In
order to obtain accurate results, calibrate the meter at a temperature
no more than ±3°C away from the sample to be measured
subsequently.
Notes
: If the fluoride electrode is new, or it has not been used for a
few days, it must be soaked in a solution of
HI 4010-10
(10
ppm fluoride so TISAB) for at least 3 hours
for at least 3 hours
for at least 3 hours
for at least 3 hours
for at least 3 hours
prior to measurement.
prior to measurement.
prior to measurement.
prior to measurement.
prior to measurement.
If the instrument was not calibrated (at least 1 point) or the
calibration was cleared, the LCD will display
“----”
on the first
LCD line.