21
20
For HI 9214 and HI 931000:
To take a pH
measurement simply submerge the tip (4cm/
1½") of the combination pH/temperature
electrode into the sample to be tested.
Turn the instrument ON. Select the pH mode
(
HI 8314
and
HI 8915
only) or press the
RANGE key until the display changes to pH
(
HI 8424
and
HI 9622
only).
Shake the electrode briefly and allow a couple
of minutes for the electrode to adjust and
stabilize. The display will show the pH value
compensated for temperature.
For HI 9214 and HI 931000:
After submerging the electrode into the sample
to be tested, wait until the stability indicator
"
∆
" stops blinking. The pH readout is also
temperature compensated.
In order to take accurate pH measurements, make sure that the
instrument is calibrated for pH before use (see page 25).
For a faster response time when using
refillable electrodes
,
unscrew the refill hole cap.
If measurements are taken in different samples successively, it is
recommended to rinse clean the electrode thoroughly to eliminate
cross-contamination. After cleaning, it is recommended to rinse the
electrode with some of the sample to be measured.
TEMPERATURE COMPENSATION
The pH reading is directly affected by temperature. In order for the
meter to measure the pH accurately temperature must be taken into
consideration.
HI 9214
and
HI 931000
use an electrode with a built-in tempera-
ture sensor and therefore no additional temperature probe is needed.
To use the Automatic Temperature Compensation feature of
HI 8314
,
HI 8424
,
HI 8915
and
HI 9622
, submerge the temperature probe
into the sample as close to the electrode as possible and wait for a
couple of minutes. The displayed pH reading is compensated for the
temperature variance associated with the effects of temperature upon
the electrode.
If you know the temperature of the sample you can also manually
4 cm
(1
½
")
RANGE
pH
∆
For HI 931000:
Attach the pH/°C electrode to the DIN socket on the top of the meter,
tighten the retainer ring and turn the meter on by pressing ON/OFF.
TAKING pH MEASUREMENTS
For HI 8014:
To take a pH measurement simply submerge
the tip (4cm/1½") of the electrode and a
ChecktempC (or an accurate thermometer) into
the sample to be tested.
Turn the rotary knob to the °C position to
display temperature setting on the LCD.
Measure the temperature of the sample with a
ChecktempC (or an accurate thermometer), e.g.
25°C.
Using the provided screwdriver, turn the temperature trimmer to
display the measured temperature value.
Turn the rotary knob to the pH position to
display the pH measurement.
Shake the electrode briefly and allow a couple
of minutes for the electrode to adjust and
stabilize. The display will show the pH value
compensated for temperature.
For HI 8314, HI 8424, HI 8915, HI 9214, HI 931000 and
HI 9622:
To take a pH measurement simply submerge
the tip (4cm/1½") of the electrode and the
temperature probe into the sample to be
tested.
ins rum n s
CFM
°C
CAL
OFF
ON
pH
HI 931000
ON
OFF
°C
4 cm
(1
½
")
OFF
mV
°C
pH
OFF
mV
°C
pH
pH
4 cm
(1
½
")
°C
ºC
