INFICON Crystal 12 Sensor - Manual (Page 40)

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Crystal12 Sensor Operating Manual
6 Add the air fitting to the tube which has the female thread adapter installed.
7 Connect 1/8" diameter tubing from the valve output (A) to the feedthrough
fitting.
CAUTION
Use of more than 80" (2 meters) of 1/8" tubing between
the valve with the orifice and the bellows may cause a
switcher failure because of the time required to bleed out
sufficient air during de-pressurization. If tubing greater
than 1/8" in diameter is used, the maximum length must
be reduced proportional to the additional volume.
8 Attach the valve’s supply (normally closed (NC) port) to the 80-90 PSIG (5.5 bar
- 6.2 bar) [550 kPa - 620 kPa] source of air. Verify that the orifice (IPN 059-189)
has been installed into this NC valve port. (See Figure 3-1b of
Figure 3-1 on
page 3-3 .)
3.2 Installation with 2 3/4” Feedthrough
Installation of the solenoid valve requires a 2 3/4" feedthrough inclusive of two
coaxial feedthroughs (IPN 002-080, see
Figure 5-2 on page 5-2 ). The second
coaxial feedthrough is not used, and should be protected from damage as a result
of process material. Follow the steps below:
1 Install the Feedthrough.
2 Add the valve bracket (modified) to the desired location as illustrated in Figure
3-3 on page 3-5 .
3 Tighten the feedthrough bolts.
4 Install the air fitting to the female thread adapter.
5 Connect 1/8" diameter tubing from the valve output (A) to the feedthrough
fitting. See the CAUTION in
section 3.1 above.
6 Attach the valve’s supply (P) (normally closed (NC) port) to the 80-90 PSIG (5.5
bar - 6.2 bar) [550 kPa - 620 kPa] source of air. Verify that the orifice (IPN
059-189) has been installed into this NC valve port. (See Figure 3-1b of
Figure
3-1 on page 3-3 .)
NOTE: Maximum temperature for the solenoid valve assembly is 105 °C for
bakeout and operation.