Emerson Net Safety Millennium, Reference Manual

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The use of conductive grease is recommended on the threads.
The sensor can be mounted in a number of configurations to ensure that air particulate will
pass through the optical path of the sensor. It is recommended that the APM be mounted
horizontally to ensure that build-up of dirt, dust, and debris will not affect the operation of
the sensor.
2.5.6 Faceplate rotation
In some applications, it is necessary for the Millennium transmitter to be mounted in a
non-standard orientation. To accommodate such installations and ensure that the display
will appear at the correct angle for viewing, the PCB assembly can be rotated inside the
transmitter’s housing.
Figure 2-8 outlines non-standard orientations of the Millennium
transmitter.
Non-standard Orientation Figure 2-8:
WARNING!
Do not open the transmitter, sensor, or junction box enclosure when in a classified area or
when an explosive atmosphere may be present unless the power to the transmitter has been
removed.
The following section describes the steps required to rotate the Millennium transmitter
faceplate. Refer to
Figure 2-9 for the components in the transmitter housing. The boards
may be susceptible to ESD. Refer to Chapter 6 for further information on proper handling of
this equipment.
Procedure
1. Remove the transmitter housing cover.
2. Turn the power to the transmitter off.
3. Unscrew both the knobs marked Pull Here .
4. Lift the transmitter faceplate from the housing and allow to the faceplate to hang
from the ribbon cable.
5. Unscrew the two metal standoffs.
6. Carefully remove the PCB assembly from the housing.
7. The rotator plate is secured to the bottom of the housing and is accessible after the
PCB assembly has been removed.
Installation
12