wtw inoLab 740, Operating Manual

Page: 142 / 274

Dissolved oxygen (D. O.)
142
8.2.1 Settings
Calibration interval The calibration interval is used to determine after how many
days you want to be reminded that a D. O. calibration is due.
8.2.2 Calibration
Proceed as follows to calibrate the measuring system:
Preparatory
activities
Note
The sponge in the air calibration vessel must be moist (not
wet). Follow the instructions in the OxiCal
®
-SL operating
manual.
1 Switch to the Menu mode.
2 Use
46
to select the main Cal menu.
3 Select the Cal Int. ... menu item with
82
.
4 Confirm the Cal Int. ... menu item with
g
.
The input field for the calibration interval appears.
5 Option:
Select a digit with
46
.
6 Set the required interval (days) with
82
.
7 Confirm the calibration interval entered with
g
.
8 Use [ESC] to leave the input field.
1 Connect the D. O. probe to the measuring module.
2 Keep the OxiCal
®
-SL air calibration vessel ready.