INFICON Crystal 12 Sensor - Manual (Page 14)

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Crystal12 Sensor Operating Manual
1.1.1 Installation Requirements
1.1.1.1 Feedthrough
Š Qty (1) 2-3/4" ConFlat® with two coaxial feedthroughs, two pass water, one air
IPN 002-080, See Figure 5-2 on page 5-2 or,
Š Qty (1) 1" bolt with 1 coaxial feedthrough, two pass water, one air IPN
750-030-G1, see Figure 5-1 on page 5-1 .
1.1.1.2 Other
Š User to provide mounting structure adequate to support weight of Crystal12
and designed to facilitate removal and replacement with minimal change in
exact position. An optional mounting post kit, IPN 750-670-G1, may be
purchased for this purpose.
CAUTION
Do not mount the Crystal12 unsupported.
Š User to provide vacuum-tight braze joints or connectors for the water and air
tubes.
Š Valve assembly for air, IPN 750-420-G1 (not provided), with a 0.022" restrictor
orifice installed by the user. (Orifice included with Crystal12 accessory kit.) See
Table 1-3 on page 1-4 .
Š XIU or Oscillator designed to interface with the Cygnus controller.
1.1.1.3 Utilities
Š Minimum water flow 150-200 cc/min, 30 °C max (Do not allow water to freeze).
Coolant should not contain chlorides as stress corrosion cracking may occur.
Š Regulated air supply 80-90 PSIG (5.5 bar - 6.2 bar) [550 kPa - 620 kPa]
Š 2 meter maximum length of 1/8" tubing between bellows assembly and the
control valve.
CAUTION
Do not allow water tubes to freeze. This may happen if the
tubes pass through a cryogenic shroud and the fluid’s
flow is interrupted.