8
5. Measuring O
2
and He concentration
The flow limiter with nozzle is used in the basic configuration (see illustration).
Attach the sampler to the compressed gas bottle and use the hose to connect it to the
analyzer. The hose is slightly inserted into both components.
The analyzer switches into the helium and oxygen measuring mode upon activation, so there is
no need for you to set up anything. Open the valve on the bottle to let the gas flow in. The gas
composition is displayed after approximately 5 – 10 seconds. If the pressure inside the bottle
is distinctly lower than 200 bars, the gas flow through the sampler will be slower and the
measuring result will take somewhat longer to determine.
With the
key, you can suspend and, by pressing it again, resume measuring. When measuring
is suspended, the last measured values remain displayed. During measuring, the
key can be
used for temporarily increasing the brightness of the display to maximum (e.g. if the display is
exposed to sunlight).
When the measuring is completed, close the valve on the tank and by loosening the discharge
valve (generally 1/2 turn suffices) discharge the excess pressure of the gas so that the flow
limiter can be unscrewed from the tank valve.
Warning: Do not unscrew the discharge-valve spindle completely; a steal ball is contained
inside which upon opening could be expelled and cause injury or be lost.
Summary of Contents for HE/02
Page 1: ...MANUAL He O2 Analyzer ...
