Considerations - Emerson CSI 9420 Reference Manual

1.3

Considerations

General
Electrical vibration sensors, such as accelerometers, produce low-level signals proportional
to their sensed vibration. With simple HART configuration, the transmitter converts the
low-level sensor signal to a wireless-enabled signal.
Commissioning
The transmitter can be commissioned before or after installation. You can commission it
on the bench before installation to ensure proper operation and to be familiar with its
functions.
Make sure the instruments are installed in accordance with applicable field wiring
practices.
The CSI 9420 device is powered whenever the power module is installed. To avoid
depleting the power module, remove it when the device is not in use.
Installation
When choosing an installation location and position, provide ample access to the
transmitter. For best performance, the antenna should be vertical, with some space
between objects in a parallel metal plane such as a pipe or metal framework. Pipes or
framework may adversely affect the performance of the antenna.
Electrical
Smart
Power
Module
External
DC line
power
Sensor
MHM-97408, Rev 15
The power module contains two "C" size primary lithium/thionyl chloride
batteries. Each power module contains approximately 2.5 grams of lithium,
for a total of 5 grams in each pack. Under normal conditions, the power
module materials are self-contained and are not reactive as long as the
batteries and the power module pack integrity is maintained. Take care to
prevent thermal, electrical, or mechanical damage and protect contacts to
prevent premature discharge.
CAUTION!
Use caution when handling the power module. The power module may be
damaged if dropped from heights in excess of 20 feet.
Certain versions of the CSI 9420 are available for connecting to an external
10-28 VDC power source. This is used in place of the power module.
WARNING!
The CSI 9420 may not carry the same hazardous area ratings when operated
with external DC line power.
Make sensor connections through the cable entry at the side of the
connection head. Provide adequate clearance for cover removal.
Introduction
5