Emerson 3051S Especificações Página 16

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14
Reference Manual
00809-0100-4803, Rev DA
Section 2: Installation
April 2013
Installation
Cover jam screw
For transmitter housings shipped with a cover jam screw, as shown in 2-3, the screw should be
properly installed once the transmitter has been wired and powered up. The cover jam screw is
intended to prevent the removal of the transmitter cover in flameproof environments without
the use of tools. Follow these steps to install the cover jam screw:
1. Verify that the cover jam screw is completely threaded into the housing.
2. Install the transmitter housing covers and verify that metal contacts metal in order to
meet flameproof/explosion-proof requirements.
3. Using an M4 hex wrench, turn the jam screw counterclockwise until it contacts the
transmitter cover.
4. Turn the jam screw an additional
1
/2 turn counterclockwise to secure the cover.
Application of excessive torque may strip the threads.
5. Verify that the covers cannot be removed.
Figure 2-3. Cover jam screw
Process flange orientation
Mount the process flanges with sufficient clearance for process connections. For safety reasons,
place the drain/vent valves so the process fluid is directed away from possible human contact
when the vents are used. In addition, consider the need for a testing or calibration input.
Cover Jam Screw
(1 per side)
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