5
Functional description
Page 50
gas-lab
Q1
5.1.5 Purging
After having exchanged a gas cylinder with a flammable content, always make
sure that no air gets into the sensor system. This is why a purge must be
initiated manually after each cylinder change. This also applies if air may have
entered in a gas path connected to the sensor system.
The following reactions of the evaluation
computer are indicating the status of the
test gas injection:
The last valid gas quality values are maintained via measurement outputs,
provided any values are available at all.
The
Revision status
will not be indicated.
Proceed as described below:
1. Connect the gas cylinder to the relevant gas path. Set the pressure of the
cylinder regulator output to 1 - 5 bars and the pressure of the downstream
precision pressure regulator to 80 mbars.
2. Press the key while menue being in
the main display, select the p
urging
command and confirm it by pressing
the key enter.
3.
Gas-channel 1
appears on the
display.