16
ONE-POINT CALIBRATION
Two SETUP selectable options are available: “
Pnt
” and “
OFFS
”.
If the “
Pnt
” option is selected, the new calibration point overrides an
existing one. The adjacent slopes will be reevaluated.
If the “
OFFS
” option is selected, an electrode offset correction is
performed.
The adjacent slopes will remain unchanged.
• Proceed as described in “FOUR, THREE or TWO‑POINT CALIBRATION”
section.
• Press
CAL
after the first calibration point was confirmed. The instru‑
ments will memorize the one‑point calibration data and return to
measurement mode.
Notes:
• If the value measured by the instrument is not close to
the selected buffer, “
WRONG
” “ ” and “
WRONG
” “ ” tags will
blink alternately. Check if the correct buffer has been used, or clean
the electrode by following the Cleaning Procedure (see page 53). If
necessary, change the buffer or the electrode.
• When a custom buffer is displayed, the “
Cust.
” tag is
displayed. To change the custom buffer value in accordance with the
buffer temperature proceed as described in “WORKING WITH CUSTOM
BUFFERS” (see page 17).
• If the buffer temperature or the manual temperature
exceeds the temperature limits of the buffer, “
WRONG
” tag and
temperature reading will blink.
• If “
WRONG
”, “
Buff.
” tags and “
OLd
” message are
displayed blinking on the secondary LCD line, an inconsistency be‑
tween new and previous (old) calibration is detected. Clear calibration
parameters and proceed with calibration from the current calibration
point. The instrument will keep all confirmed values during current
calibration.
• To clear calibration parameters for all uncalibrated buffers
starting with current buffer, press
CLR
. The calibration will continue
from the current point. If this procedure is performed while calibrating
in the first calibration point, the instrument returns to measurement
mode.
• Press
RANGE
to toggle between pH
buffer, calibration buffer number and temperature
reading.