MKS HPS 947 Series, Operation And Maintenance Manual, Page: 18 / 40

12
HPS
®
Products Series 947 CEP System
To fit the Sensor with the 1 /8" NPT, do not use the case for tightening. The
Sensor's vacuum tubing has 9 /16" hex flats for tightening. Wrap a layer of
Teflon ® tape on the threads of the tubing, in the direction of installation, to
ensure a leak-free seal.
Instead of the NPT fitting, you may opt to use the ½" O-ring compression
seal against the vacuum tubing above the thread, but the O-ring seal cannot
be used for positive pressure applications.
Ensure a solid electrical connection between the Sensor
and the grounded vacuum system to shield the tube
element from external electromagnetic sources. In
applications which the System will be exposed to large
voltage fluctuations, install a centering ring with a screen,
and then ground the screen and tubing.
CEP Controller Installation
Controller Mounting
The Series 947 CEP Controller is designed for either panel mounting or for
stand-alone use. Regardless of the method you choose, assure adequate
ventilation to the Controller with at least a ½ of an inch left open above and
below the perforated panels.
An optional hardware kit is also available for mounting the Controller into a
standard ¼ DIN cutout in a panel up to
3 /
16
-inch thick (see Accessories,
p.26). A dimensioned illustration below shows the required cutout. Leave at
least 3 inches of clearance behind the Controller to accommodate the
connectors and cables.
Mount the Controller into the panel by slipping it through the cutout from the
front. Slide the panel mounting brackets into the slots on either side of the
Controller from the rear, and secure them with the thumbscrews provided.