Hanna Instruments HI 2216 - Manual (Page 8)

8
RELATIVE mV MEASUREMENTS
• Press RANGE until “rEL” message and “mV” tag are displayed for
one second. After one second the temperature will be displayed on
the secondary LCD and the “
mv” tag will blink.
The reading displayed by the instrument is equal to the difference
between the current mV input value and relative mV offset established in
the relative mV calibration.
ISE MEASUREMENT
To perform ion concentration measurements, connect an optional ISE
electrode to the instrument input (BNC or BNC and REF if separate
reference electrode is used). Enter the ISE mode by pressing
RANGE key
until the display changes to ppm. Select the corresponding ion charge in
the SETUP menu.
Submerse the ISE electrode (reference electrode) and
temperature probe (3 cm/1¼”) into the sample to
be tested and wait a few seconds for the reading to
stabilize.
The ppm reading will be displayed on the primary
LCD and the current temperature value on the
secondary LCD.
In order to take accurate ISE measurements, make sure that the
appropriate ion charge was set in the SETUP menu and the instrument
was calibrated (see ISE CALIBRATION for details, page 15).
Notes: • When the reading is out of range, the display will flash the
closest full-scale value.
• The instrument will display “ ----” on the primary LCD if it is
not calibrated. Perform at least a one-point calibration if the
ion charge is
-1, 1, -2, 2 or a two-point calibration for the
“ undF” option selected in SETUP menu in order to take ISE
measurements.
3 cm
(1¼")