wtw Turb 555, Operating Manual

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Turb 555 / Turb 555 IR Operation
39 ba41113e07 04/2009
4.4.4 Five-point calibration
Calibration
sequence
For the five-point calibration according to the calibration pro-
gram, the instrument is calibrated with the following calibra-
tion standards in the following sequence:
0.02 > 1750 > 10000 > 100 > 10 > 0.02 NTU
Note
If, after the end of a calibration step, you do not continue the
calibration within 5 minutes, the instrument automatically re-
turns to the normal measuring mode. It will then continue to
work with the previous calibration data.
Calibration To calibrate your measuring instrument using the calibration
program, proceed as follows:
1 In the normal measuring mode, press the
8
or
2
key
until the
c
indicator appears on the left part of the
display.
2 If necessary, enter the calibration code (section
4.3 A
CCESS CODES
).
3 Press
1
.
In the lower display line, the instrument asks you to
insert the 0.02 NTU calibration standard.