Emerson Process Management 3000 - Manual (Page 132)

Instruction Manual
Appendix B Rev. 2.2
January 1997
B-8 Appendices Rosemount Analytical Inc. A Division of Emerson Process Management
World Class 3000
SERVICE AND NORMAL MAINTENANCE
B-5 OVERVIEW
This section describes service and routine
maintenance of the HPS 3000 Heater Power
Supply Field Module. Replacement parts re-
ferred to are available from Rosemount. Refer to
Table B-2 of this manual for 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.
B-6 FUSE REPLACEMENT
The heater power supply mother board (12,
Figure B-7) contains four identical 5 amp fuses.
Refer to Table B-1 for replacement fuse specifi-
cations. To check or replace a fuse, simply un-
screw the top of the fuseholder with a flat head
screwdriver and remove fuse. After checking or
replacing a fuse, reinstall fuseholder top.
B-7 TRANSFORMER REPLACEMENT
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.
a. Turn off power to system.
b. Loosen captive screws retaining HPS cover.
Remove cover.
c. Remove hex nut (25, Figure B-7) from top of
transformer assembly. Remove retaining
plate (24) and gasket (22).
d. Disconnect transformer harness plug from
mother board.
e. Remove old transformer. Place new trans-
former in position and reconnect harness
plug as noted in step d.
f. Place gasket and retaining plate on trans-
former.
g. Tighten hex nut only enough to firmly hold
transformer in place.
h. Reinstall HPS cover.
B-8 MOTHER BOARD REPLACEMENT
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.
a. Turn off power to system.
b. Loosen captive screws retaining HPS cover.
Remove cover.
c. Remove hex nut (25, Figure B-7) from top of
transformer assembly. Remove retaining
plate (24) and gasket (22).
d. Disconnect transformer harness plug from
mother board.
e. Remove screws on either side of terminal
strip covers (2). Remove terminal strip cov-
ers (4 and 8).
f. Unplug ribbon cable from the receptacle on
the daughter board (7).
g. Unscrew stand offs on either side of the
daughter board. Remove daughter board
(7).
h. Unscrew four stand offs that supported the
daughter board.