Emerson ROSEMOUNT 3000 - Manual (Page 159)

Instruction Bulletin
Appendix E Rev. 4.6
May 2005
Rosemount Analytical Inc. A Division of Emerson Process Management Appendices E-9
World Class 3000
SERVICE AND NORMAL MAINTENANCE
E-5 OVERVIEW
Use the instructions in this section of the ap-
pendix to repair the Intelligent Field Transmitter.
Disassemble the unit only as needed to replace
damaged components. Use the assembly pro-
cedures that apply to install replacement parts
and reassemble the unit.
Replacement parts for the Intelligent Field
Transmitter are available from Rosemount
Analytical. Refer to the parts list at the end of
this appendix for replacement part numbers
and ordering information.
Install all protective equipment covers
and safety ground leads after equip-
ment repair or service. Failure to in-
stall covers and ground leads could
result in serious injury or death.
E-6 REMOVE POWER AND OPEN COVER
Perform the following procedure to remove
power to the Intelligent Field Transmitter and
open the unit cover for service.
Disconnect and lock out power before
working on any electrical components.
There is voltage up to 240 Vac, and
could cause personal injury.
a. Turn off power to the system. Lock out and
tag out power at the main disconnect box.
b. Loosen two captive screws (1, Figure E-6)
and open enclosure cover (2).
E-7 REPLACE FUSE
The power supply board contains six identical
5 amp fuses. Perform the following procedure to
check or replace a fuse.
a. Unscrew fuseholder cap (3, Figure E-6) and
remove fuse (4). Check or replace fuse.
b. Install new fuse (4) and fuseholder cap (3).
E-8 REMOVE ELECTRONICS CHASSIS FROM
ENCLOSURE
Use the following procedure to remove the
electronics chassis (5, Figure E-6) from enclo-
sure (6). Perform this procedure only as needed
to replace damaged components installed on
the chassis.
a. Unplug two ribbon cables (7 and 8).
b. Unplug heater and fan connector plug (9).
c. Loosen screw (10) and washer (11). Slide
microprocessor assembly (12) up and re-
move from electronics chassis (5).
d. Remove protective cover (13).
e. Disconnect power leads L and N from
power input terminals.
f. If connected, remove Heater Power Supply
(HPS) power leads H and N from power
supply terminals.
g. Loosen screws (14). Lift and remove elec-
tronics chassis (5) from enclosure.