GREEN INSTRUMENTS G4130 NOX/O2, Руководство пользователя, Страница: 20 / 32

G4130 NO
x
/O
2
Analyzing System
19
5 System Operation
5.1 Calibration Mode
In the calibration mode (both
Zero
and
Span
), the selector valve must stay at the
Calibration
position.
For zero calibration
Turn the selector valve to Zero position.
Check that the instrument air (zero NO
X
gas) is connected to the air supply
filter regulator.
The pressure of the zero NO
X
gas must not exceed 8 bar and should be re-
duced to 0.3…1 bar at the air supply filter regulator station. The flow of
zero NO
X
gas should be approximately 0.5…1 l/min. which can be adjust-
ed at the calibration flow meter.
For span calibration
Turn the selector valve to
Span
position.
Check that the span NO
X
gas is connected to the span NO
X
gas connection.
The pressure of the span NO
X
gas should be approximately 1 bar. The flow
of the calibration gases should be approximately 0.5…1 l/min. which can
be adjusted at the calibration flow meter, or at the fixed flow valve of the
test gas bottle.
After calibration, remember to turn both selector valves back to the Operation
position.