
10
The plastic tubing supplied with the gas should be pushed firmly over
the reducing connector.
Slowly turn the control knob anti-clockwise until the ball in the flow
indicator is between the two marks. This will then supply a gas flow
of approximately 0.25 l/min. Apply this flow for 25 seconds and if
20 ppm
carbon monoxide
in air
Flow
Indicator
Control
Valve
Reducing connector for
for Calibration
Plastic Tubing
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