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CrystalSix Sensor Operating Manual This page is intentionally blank. IPN 074-155G 2 - 18

CrystalSix Sensor Operating Manual Chapter 3 Installation of the Shutter Control Valve Assembly The shutter control valve assembly (IPN 007-199) and the feedthrough should be installed at the same time. The same valve assembly is used for both the 1" and the (recommended) 2 3/4" feedthroughs. However, if the assembly is to be used with the 2 3/4" feedthrough, you will need to modify the valve bracket as follows. For the following steps, see Figure 3-3 on page 3-5. (DWG. 206-854) 1 Align the score line on the valve assembly bracket over the edge of a table or other square edge. 2 Using pliers, grasp the part of the bracket extending over the edge and push down. The assembly will break along the score line. Use a file to smooth any rough edges which occur along the break. NOTE: In order for the multiple crystal sensor to operate properly, a .022" diameter orifice (IPN 059-189 provided in Kit 750-268) must be installed in line between the air supply and the solenoid valve assembly. This is accomplished by the following procedure. See Figure 3-2 on page 3-4. 1 Unthread the compression fitting attached to the normally closed (N.C.) port of the miniature solenoid valve (Item #5). 2 Install the orifice by threading it into the normally closed (N.C.) port of the miniature solenoid valve. 3 Thread the compression fitting previously removed into the orifice. IPN 074-155G NOTE: Do not install the orifice into the normally open port. This will require a longer time interval for depressurization of the bellows assembly and leads to apparent sensor failure. 3.1 Installation with 1” Bolts Installation of the shutter control valve assembly for the CrystalSix sensor requires one 1" bolt feedthrough (IPN 750-030-G1, See Figure 5-1 on page 5-1). Follow these steps: 1 Ensure that the o-ring is in place on the bolt. Insert the 1" bolt such that the hexagonal shaped end of the bolt is on the vacuum side of the chamber. 2 Add the Bracket. 3 Add the Washer. 4 Add the Nut. 3 - 1

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