12
• To clear calibration parameters for all buffers starting with
current buffer, press and hold down
CFM,
then press
CAL.
The calibration will continue from the current point. If
this procedure is performed while calibrating in the first
calibration point “
CLr ALL
” message is displayed for a few
seconds then the instrument
returns to measurement.
• Press
RANGE
(
u
for
HI 2212
)
to toggle between pH buffer and
temperature reading.
• Each time a buffer is confirmed, the new calibration data
replaces the old calibration data of the corresponding buffer.
If current confirmed buffer has no previous data stored and
the calibration is not full (three buffers), the current buffer
is added to the existing data. If the existing calibration is
full, the instrument asks which buffer to replace.
Press the
ARROW
keys to select another buffer to be replaced.
Press
CFM
to confirm the buffer that will be replaced.
Press
CAL
to leave calibration without replacing.
Note
: If the replaced buffer is outside the ±0.2 pH window,
around each of the calibrated buffers, it is possible to
select this buffer for next calibration during current
calibration.
WORKING WITH CUSTOM BUFFERS
If a custom buffer was set in SETUP menu, it can be selected for calibration
by pressing the
ARROW
keys. The “
BUFFER pH
” tag will blink.
Press
SETUP
if you want to adjust the buffer value. The buffer value will
start blinking.
Use the
ARROW
keys to change the buffer value.
After 5 seconds the buffer value is updated. Press
SETUP
if you want to
change it again.
Note
: Custom buffer value can be adjusted in a ±1.00 pH window,
around the set value.
