INFICON VSC150A absolute switch, passiv - Manual (Page 7)

1.3.3 Switching Amplifier Mode of Operation
A switching amplifier is required for each Vacuum
Switch. The output relay supplied with heavy-duty chan-
ge-over contact is energized when the pressure drops
below the value preset on the Vacuum Switch, i.e. if the
contact between diaphragm and contact pin in the refe-
rence chamber opens by flexing of the diaphragm. The
built-in slide switch (Fig. 5) must be set to the connected
type of Vacuum Switch.
7
7
tina42e1 (2005-03) VSC150.ga
tina42e1 (2005-03) VSC150.ga
1.3.3 Switching Amplifier Mode of Operation
A switching amplifier is required for each Vacuum
Switch. The output relay supplied with heavy-duty chan-
ge-over contact is energized when the pressure drops
below the value preset on the Vacuum Switch, i.e. if the
contact between diaphragm and contact pin in the refe-
rence chamber opens by flexing of the diaphragm. The
built-in slide switch (Fig. 5) must be set to the connected
type of Vacuum Switch.
9
(R) (M)
10
9
(R) (M)
8
7
6
5
4 3 2 1
Fig 1 Schematic diagram of the Vacuum Switches
Key to Fig. 1
1 Adjusting Screw
2 Sensing chamber (M)
3 Diaphragm
4 Adjusting valve
5 Reference volume (R)
6 Contact pin
7 Current leadthrough
8 Electrical connection
9 Vacuum connection flange
10 Differential pressure adapter
9
(R) (M)
10
9
(R) (M)
8
7
6
5
4 3 2 1
Fig 1 Schematic diagram of the Vacuum Switches
Key to Fig. 1
1 Adjusting Screw
2 Sensing chamber (M)
3 Diaphragm
4 Adjusting valve
5 Reference volume (R)
6 Contact pin
7 Current leadthrough
8 Electrical connection
9 Vacuum connection flange
10 Differential pressure adapter