Functional description
5
gas-lab
Q1
Page 49
To connect a new cylinder, proceed as follows:
5. Secure the new cylinder with a chain or clamp against falling down at first.
6. Remove the protective cap from the cylinder by unscrewing it.
7. Make sure that the main valve on top of the cylinder is closed.
8. Remove the nut from the valve connection now.
9. Make sure that the pressure reducing valve and the shut-off valve of the
high-pressure regulator or cylinder pressure regulator to be connected are
closed. Close the pressure reducing valve by unscrewing its setting screw.
10. Now connect the cylinder connection of the high-pressure regulator or
cylinder pressure regulator to the valve connection of the gas cylinder.
11. Open the main valve of the gas cylinder and adjust the outlet pressure of
the high-pressure regulator or cylinder pressure regulator to the operating
pressure needed by the sensor system for the gas stream you are
preparing just now. (i.e.: 1
– 5 bars if in front of an additional low pressure
regulator (M2R) or only 80 mbars if directly connected to gas path 3 of
sensor system)
To purge the high-pressure or cylinder pressure regulator, proceed as follows:
12. Close the main valve of the gas cylinder and wait until the high-pressure
regulatoror cylinder pressure regulator is almost drained, i.e. until the outlet
pressure has almost dropped down to 0 bar. Now open the gas cylinder
again.
13. Repeat this draining and filling of the high-pressure regulator or cylinder
pressure regulator twice to ensure that the regulator’s dead volume does
not contain gas from the previous use or air.
14. Pay attention to the fact that the gas cylinder must be open finally to make a
calibration or measurement possible.