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4690 Series
Turbidity systems
7 Calibration
24
IM/4690–EN Rev. A
7. Calibrate the sensor as follows:
Sensor Calibration
Press
to advance to next page
or
Press
to advance to next parameter.
Calibration Security Code
Enter the required calibration code number, between 00000 and 19999. If an incorrect value is
entered, access to calibration is prevented and the
SENSOR CAL.
page is displayed.
Dry Standard Calibration
Press the
key to select
Formazine Std.
Zero Calibration
Press the
key. The display changes to
Calibrating Zero
.
Calibrating Zero
After approximately one minute, the display changes to
Fill Span Sol.
if zero calibration is
successful.
If
Cal Fail
is displayed, remove the dry standard and ensure the emitter and receiver lenses are
clean and dry. Refit the dry standard, ensuring it is fitted correctly (see step 6, page 22) and repeat
the procedure.
Note.
Do not touch the light reflecting parts of the standard.
Continued on next page.