700 P electronics module
Operation
6.
117
6.3.4
pH calibration
Please note
During pH calibration, the buffer solution and the sample water
should have the same temperature. If the buffer solution and the
sample water are at different temperatures, it is possible to enter
the temperature value of the buffer solution for calibration during
span alignment.
Proceed as follows:
pH7 alignment
1
Starting from the main screen, press the menu field with mea-
suring value “pH”.
2
Select the menu field “Calibration”. The window “pH - Calibra-
tion” appears on the graphic display.
3
Select the "pH 7" parameter.
4
Place the beaker into the bottom clip and fill with the buffer
solution "pH 7.00" or clamp the bag with the buffer solution
"pH 7.00" into the bottom clip.
5
Close the sample water inlet and outlet (for pressurized ver-
sion of the flow cell only) and open the sample taking unit
(drain) briefly. Close the sample taking unit (drain) once more.
6
Pull or unscrew the pH sensor from the cover of the cell body
of the flow cell.
7
Dip the pH sensor through the top clip at least 2 cm (1 inch)
deep into the buffer solution and move slightly until the indi-
cated pH value remains constant.
8
Use the input field to enter the value of the buffer solution to be
calibrated.
9
Confirm the entry with the Enter key.
Slope alignment
10
Remove the buffer solution “pH 7.00” from the bottom clip.
11
Wash the sensor in distilled water to prevent carryover of the
buffer solution.
12
Select the parameter “pH X”.
13
If the sample water and the pH buffer solution are at different
temperatures, the temperature value of the buffer solution
should be entered under “Calibrate at” The value is deleted
again when the menu “pH X” is closed.
14
Place the beaker into the bottom clip and fill with the buffer
solution "pH 4.65" or clamp a bag with the buffer solution "pH
4.65" into the bottom clip.
Please note
If buffer solutions other than those stated are used, the pH value
of the buffer solution must be lower than pH 6 or higher than pH 8.
Содержание WALLACE & TIERNAN 700 P
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Страница 145: ...700 P electronics module Declarations and certificates 10 145 10 2 Certificate of Compliance...
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