Sony Multiscan CPD-1304S, Руководство по обслуживанию

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4 Structure of GasLab Q2
Page 22 of 135 G a s Q u a l i t y A n a l y z e r GasLab Q2
The figure shows the gas path with opned valves during normal operation, which is called
analysis.
Figure 4.3: Gas path during analysis function
The sensor block consists of parts with gas channels, attached to electronics and sensors. An
integrated pressure regulator reduces the inlet pressure for the measurement.
Then the gas is supplied to a sensor measuring chamber. The infrared sensor and the thermal
conductivity sensor analyze the gas there, and a pressure transmitter measures the pressure of
the gas.
In order to get stable results, the block is heated electrically to 70°C. A mounted fan prevents an
excessive rise in temperature. A temperature sensor measures this block temperature, called
TSB, and gives it to the control.
The complete control, regulation and measurement logging is done in the sensor electronics. The
signals are transmitted digitally. After recording, the measured gas is supplied back into the lower
housing part.
The measuring system typically operates at a gauge pressure of about 15 KPa. The typical flow
is 30 - 60 l/h. The flow can be changed depending on the application (30 l/h standard; 60 l/h fast).