INFICON VSA100A differential to ambient - Handbuch (Seite 13)

tina29d2-b (2004-10) VSA100A.ga
2 Start up
Note
When leak detecting with a helium leak detector,
spraying the pressure switch with helium may result in a
helium proof. This is in general not due to a leak of the
VSA100A, but is permeation of helium through the
EPDM diaphragm.
2.1 Vacuum Connection
The VSA100A is connected to the vacuum system via a
DN 16 KF small flange.
The VSA100A should preferably be mounted standing
on its flange. Inclined mounting is also permissible,
including the horizontal position. Downward installation
is not permissible because in such a case condensate
may collect in the pressure switch. This affects the
measurements and may damage the pressure switch.
Dimensional diagram of VSA100A, see Fig. 1.
2.2 Electrical Connection
The contact assignment is given in Fig. 2.
The VSA100A is supplied with a connected 3 m long
tina29d2-b (2004-10) VSA100A.ga
13
13
72
50
DN16 KF
Ø 48.5
Fig. 1 Dimensional diagram VSA100A
Atmospheric pressure
(rest position)
Fig. 2 Contact assignment of microswitch
1 (black)
1 (black)
3 (brown)
2 (grey)
2 (grey)
3 (brown)
Low pressure
(operating position)
2 Start up
Note
When leak detecting with a helium leak detector,
spraying the pressure switch with helium may result in a
helium proof. This is in general not due to a leak of the
VSA100A, but is permeation of helium through the
EPDM diaphragm.
2.1 Vacuum Connection
The VSA100A is connected to the vacuum system via a
DN 16 KF small flange.
The VSA100A should preferably be mounted standing
on its flange. Inclined mounting is also permissible,
including the horizontal position. Downward installation
is not permissible because in such a case condensate
may collect in the pressure switch. This affects the
measurements and may damage the pressure switch.
Dimensional diagram of VSA100A, see Fig. 1.
2.2 Electrical Connection
The contact assignment is given in Fig. 2.
The VSA100A is supplied with a connected 3 m long
72
50
DN16 KF
Ø 48.5
Fig. 1 Dimensional diagram VSA100A
Atmospheric pressure
(rest position)
Fig. 2 Contact assignment of microswitch
1 (black)
1 (black)
3 (brown)
2 (grey)
2 (grey)
3 (brown)
Low pressure
(operating position)