Xylem ProLab 1000 BENCH TOP pH METER - Manual (Page 48)

Operation ProLab 1000
48 ba75576e04 01/2011
Note
For single-point calibration, the meter uses the Nernst slope
(-59.16 mV/pH at 25 °C) and determines the zero point of the
electrode.
Continuing with two-
point calibration
(Buffer: NIST/DIN)
6 Wait for the end of the measurement with Stability control or
accept the calibration value with <MENU/OK>.
The calibration display for the next buffer appears.
7 For single-point calibration, select Exit with one point
calibration with <
▲><▼> and confirm with <MENU/OK>.
The calibration is completed as a single-point calibration.
The new calibration values are displayed as a message ([
i]).
You have the following options:
z Accept the new calibration values with <MENU/OK>.
Subsequently, the calibration record is displayed and
downloaded to the interface at the same time.
z To switch to the measured value display without accepting
the new calibration values, press <MODE> or <ESC>.
[ i] Buffer series NIST/DIN
[ i] Immerse sensor in buffer 2
Exit with one point calibration
Continue
pH <CAL>
8 Thoroughly rinse the electrode with distilled water.
9 Immerse the electrode in buffer solution 2.
10 If the Set temperature menu item appears, measure and enter
the temperature of the buffer manually (measurement without
temperature sensor).
11 Select Continue with <
▲><▼> and press <MENU/OK>. The
buffer is measured.
The measured value is checked for stability (Stability control).