6 | Operation and maintenance
G 1501
22 / 37
B-H86.0.12.DB2-2.1
8.
Adjust the value corresponding to the buffer solution with the
Up button
and
Down
button
and confirm the entry by pressing the
Function key
.
9.
The
PK.SL
parameter appears in the display.
10.
Place the electrode in the second buffer solution with a value below pH 6 or above
pH 8.
NOTE
A gradient compensation with buffer solutions between pH 6 and pH 8 is not possible.
With entry of the compensation value, the resulting gradient value is calculated imme-
diately and
(AL ERR.2
or
(AL ERR.3
appears in the display instead of the measurement of
the values are invalid.
11.
Wait until the display value is stable.
12.
Adjust the value corresponding to the buffer solution with the
Up button
and
Down
button
and confirm the entry by pressing the
Function key
.
13.
Then, rinse the electrode again with distilled or deionised water.
After successful completion of the calibration, the assessment of the electrode condi-
tion is displayed briefly in percent. Then, the current measurement is shown in the
display again. A low value can be the result of the age of the electrode, contaminated
or old buffer solutions or impurities on the BNC connector.
If the calibration is not completed successfully, an error message is displayed.
(AL ERR.
. Confirm the error mes-
sage pressing the
Function key
. The product restarts and the standard value for the ze-
ro point and gradient are restored.
6.3.1.6
Display the electrode assessment of active calibration
Invoke the menu by pressing and holding the function key as described in chapter 7.
Press the function key to access the parameter “
PK.OF
”. Close the menu by pressing
and holding the function key (Do not change values)
– the electrode assessment in
percent is displayed (“----” if no valid data is available).
Outcome of an action
