View and design
2
gas-lab
Q1
Page 7
The pressure regulators with integrated safety shut-off/pressure relief valves for
the process and calibration gases are necessary, as the maximum absolute inlet
pressure of the gases must never exceed 1,250 mbars. The pressure regulators
have been set by the manufacturer to a control pressure of 80 mbars (gauge).
The integrated pressure relief valve starts to vent at an overpressure of about
110 mbars and above. The safety shut-off valve has been set to a tripping
pressure of 142 mbars (gauge) by the manufacturer.
2.2 Evaluation computer
The housing of the
gas-net
Q1 evaluation computer is designed as plug-in unit
for a 19”-frame and is available in two housing sizes, i.e. with a mounting width
of 1/3 for up to three process boards or a mounting width of 1/2 for up to six
process boards.
The device front includes one 8x32 characters-LCD, one keypad with 16 keys,
one status LED and the calibration switch. The DSS data interface is also
located on the device front. It serves the connection of a PC or laptop for
servicing purposes.
The following illustration shows, as an example, the front view of a
gas-net
Q1 in
the narrow design with a mounting width of 1/3:
0
9
8
7
,
6
5
4
_
3
2
1
Q1
gas-lab
Status
Cal.-
switch
close open
DSS
Gas Quality Meter
Data
interface
Key pad
Calibration
switch
Status LED
Display