765 Laboratory pH Meter
18
Operation
Calibration level
Calibration adjusts the pH meter to the electrode in
use. It is adjusted for zero and slope of the elec-
trode.
You only have to select the used buffer set once on
the Parameter level. The patented Calimatic
®
then
automatically recognizes the buffer solution in use,
calculates zero point and slope of the electrode and
adjusts correspondingly. In addition, the Model 765
measures the electrode response time during cali-
bration.
Activating calibration
Press
to exit measuring mode and access the
Calibration level. You can stop calibration at any
time by pressing
.
The meter can only operate properly when the
buffer solutions used correspond to the buffer set
selected on the Parameter level. Other buffer solu-
tions, even those with the same nominal values,
may demonstrate a different temperature behavior.
This leads to measurement errors.
Immerse the electrode and temperature probe in
the first buffer solution. This can be any of the
selected solutions. Press
or
to start cal-
ibration. If you do not want to calibrate, select CAL1
NO using
and press
to exit Calibration
level.
The response time of the electrode and tempera-
ture probe is considerably reduced if the electrode
is first moved about in the buffer solution and then
held still. The values will stabilize more quickly.
cal
