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INSTALLATION, OPERATION & SERVICE
2.1 INSTALLATION & REMOVAL/REPLACEMENT OF THE LPI
2.1.1 Installation/Removal of the Loop Powered Indicator
The following parts are provided for field installation of the Loop Powered Indicator option:
One (1) - O-Ring, Size - 149
Two (2) - Standoffs, #4 M/F Shoulder
Two (2) - Standoffs, 4-40 x .750 M/F
One (1) - Meter Motherboard Ass'y.
One (1) - Meter/Display Board Ass'y.
Two (2) - Standoffs, 4-40 x .375 M/F
Four (4) - Screws, 4-40 x 1⁄4 Pan Head
One (1) - 2808 Display Cover Ass'y.
Never attempt to service a Model 2808 Transmitter while
it is operating in a hazardous environment. Either the
area must be made safe or the unit must be unwired,
unmounted, and taken to a safe, non-hazardous area.
Never attempt to install or remove any components (PCBs
or Field Wiring.) while the unit is running. Doing so can
cause sudden electrical transients or imbalances that
are capable of causing damage to the module or
component in question, as well as other associated
circuit boards. Always turn off ANY Transmitter to
Instrument circuits (at the instrument or External DC
Power Source) before changing or adding any com-
ponents.
Place any related critical processes under manual or
auxiliary control prior to shutting down or performing
any of the steps discussed herein.
To install the Loop Powered Indicator (LPI) option into a Model 2808 Transmitter, follow
steps 1 through 9 below. To remove the LPI see step 10. Note: The LPI is loop powered and
may only be used with Model 2808's configured in the "4-20mA" mode.
1. Remove the appropriate Cover Assembly from the instrument (see Figure 2-1). The
Cover Assembly is factory installed "hand tight," i.e., there is no torque required.
Appendix B
Section 2
WARNING
WARNING
CAUTION
Page 3
Loop Powered Indicator
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