wtw TresCon NOx-N, Operating Manual

Page: 84 / 112

Maintenance NOx-N
3 - 36 ba43110e05 01/2011
Preparing the
calibration
To calibrate, you need the following four calibration standards (for
ordering information, see section 6.1 A
CCESSORIES AND MATERIAL
SUBJECT TO WEAR
):
Cleaning solution causes severe corrosion
Do not allow this substance to get into the hands of children. Wear
suitable protective gloves and goggles/face mask when working with
this substance.
If this substance gets into the eyes, rinse thoroughly with water and
consult a doctor.
Starting calibration
Ca 10 mg/l NO3
-
Cb 50 mg/l NO3
-
Cc 150 mg/l NO3
-
Cd 250 mg/l NO3
-
1 Check that the dist. H2O is connected and, if necessary,
connect it. Only use distilled water free of contamination (e.g.
softeners).
2 Pull the sample tubing out of the overflow vessel.
3 Insert the open end of the tube into a collecting container.
1 Measuring mode
Select the NOx-N measuring module with
68
.
2 Call up the Parameters NO
X
-N menu with
3
. The main
menu appears on the display.
3 Select the Service menu item with
68
and confirm with
3
. The service menu appears.
4 Select the Calibration menu item with
68
and confirm
with
3
.
5 Input the PIN digit-by-digit with
68
. Change the digit
with
57
and confirm with
3
. A checklist appears on
the display.