PST PST-UM-2010-EN-02, Руководство пользователя

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Minox i Oxygen Transmitter User Manual
ProcessSensing.com 9
This will ensure calibration is accurate, and avoid over-pressurizing the oxygen sensor.
Figure 7. Calibration for Minox i %
2. Allow one to two minutes for the output to stabilize (i.e reach its ambient air concentration
value and remain at the value). An independent portable oxygen analyzer can be used to
check this.
3. Observe the O
2
concentration on your oxygen analyzer display. It should read 20.9 %
volume O
2
.
4. Place the MagTip on the Minox i main housing, adjacent to the red indicator LED, as shown
in
Figure 8
below.
The indicator LED will begin to flash rapidly.
Figure 8. Minox i with MagTip calibration tool
5. When calibration is complete, the indicator LED will resume flashing at a steady pulse.
For the standard 0...25 % O
2
range, the 4...20 mA output will be automatically adjusted to
17.376 mA.
O
²
To customer control
system interface
Cylinder oxygen (20.9%)
or ambient air
Typical in-situ pipeline
calibration application
Electrical signal cable
Indicator LED
MagTip calibration tool