Manual

Operation ProLab 1000
38
ba75576e04 01/2011
4.5.4 Settings for pH and ORP measurements
Overview The following settings are possible for pH and ORP measurements:
z Resolution
z Calibration interval
z Buffers for calibration
z Unit for zero point
z Unit for slope
z Calibration record (display)
z Calibration history
Settings The settings are made in the measuring menu of the pH/ORP
measurement. To open it, activate the relevant measuring window in
the measured value display and press <MENU/OK>. After completing
the settings, switch to the measured value display with <MODE>.
Menu item Possible setting Description
Calibration /
Calibration record
- Displays the calibration
record of the last
calibration.
Calibration /
Calibration history
- Displays the calibration
history of the last
calibrations.
Calibration /Buffer NIST/DIN
TEC
...
Buffer sets to be used for
pH calibration (see
page 40).
Calibration /
Calibration interval
1 ... 999 d Calibration interval for the
pH electrode (in days).
The meter reminds you to
calibrate regularly by the
flashing CalClock in the
measuring window.
Calibration /Unit for
zero point
mV
pH
Unit for the zero point.
Calibration /Unit for
slope
mV/pH
%
Unit of the slope.
The % display refers to
the Nernst slope of
-59.16 mV/pH
([determined slope/Nernst
slope] x 100).