wtw Turb 430 IR/T, Operating Manual

Page: 38 / 72

Operation Turb 430 IR/T
38 ba75507e04 06/2009
Note
Before measuring the third calibration standard of 0.02 FNU/NTU you
can exit the calibration with
<ESC> at any time.
The new calibration data is discarded. The old calibration data is further
used.
3 Align the cell:

Marked cell:
– Align the marking on the cell cap with the marking on the
cell shaft.
– Press and hold the <START/ENTER> key until the
measured value is displayed.

Unmarked cell (see page 33)
– Press and hold the <START/ENTER> key.
– Slowly and in small steps turn the cell by one complete
rotation (by 360 °).
– After each step wait for a short time until the displayed
measured value is stable.
– Turn the cell back to the position with the lowest
measured value.
4 Release the <START/ENTER> key.
Measurement of the calibration standard begins.
5 Repeat the steps 4 - 6 with the calibration standards, 10.0 FNU/
NTU and 0.02 FNU/NTU.
After measuring the 0.02 FNU/NTU calibration standard, the
calibration result is displayed.
Calibration is completed.
6 Confirm the calibration result with <START/ENTER> .
The calibration record is displayed.
7 Confirm the calibration record with <START/ENTER> .
The display shows instructions for the first measurement.
i
Turb. = 1000 FNU/NTU
i
Start calibration
by releasing <START>
Turbidity \ Calibration