25
4.12.3 NO-Measurement
4.12.4 Mounting a new NO-Sensor
This menu is used to check the NO
measuring sensor.
Start the NO test by pressing E or by
double-clicking the mouse.
Zero calibration now takes place.
After zero calibration, the data of the NO
measuring sensor are displayed.
Limit values with air:
NO < 20ppm NO
Voltage 3.290 V
+ 0.040 V
Current 10 µA
+ 10µA
If the limit values are not complied with,
perform trouble-shooting as described in
Section 10.20.
Return to the NO menu by clicking Back
or by pressing Alt + B.
i See Section 10.20 for sensor
installation
After the NO measuring sensor has been installed, it must be calibrated. The date of
calibration is written in the flashprom, enabling the age of the NO measuring sensor to be
determined subsequently at any time.
The same calibrating gas is used for calibrating the NO measuring sensor as for
recalibration.
Before commencing calibration, connect the BEA to the calibrating-gas bottle as shown
in the illustration below.
1 Calibrating-gas bottle
2 Flow meter (rotameter)
3 Shutoff valve
4 Tee
5 Test-gas inlet
Best.- Nr.
Typ
Geräte - Nr.
FD U ( V )
P ( W ) F ( Hz )
Made in Germany
088
Best. Nr. 1687 022 768 FD xxx
AF 1
O
2
GF 3 GF 2
cal
459737/25Ha
NO
2
1
4
3
5
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