Gc Controller Maintenance; Gc Controller Maintenance; Gc Controller Access - Emerson Daniel Danalyzer 1000 Hardware Reference Manual

MODEL 1000
5.6

GC CONTROLLER MAINTENANCE

The GC Controller is designed to operate for long periods of time without need for preventive or
regularly scheduled maintenance.
SERIOUS PERSONAL INJURY OR DEATH POSSIBLE
The upper purged enclosure should not be opened when the unit is exposed to an
explosive environment. If access to the upper purged enclosure is required, precautions
must be taken to ensure that an explosive environment is not present.
Failure to observe all safety precautions could result in serious injury or death.
Should there be a need to open the upper purged enclosure, first disconnect all AC electrical power
to the unit, and ensure the area is free of explosive gases. Also, prior to opening the GC Controller,
check the operating parameters of the application, with either a PC or the GC Controller's built-in
display, and attempt to isolate or fix any incorrect parameters.
5.6.1

GC Controller Access

To access any of the GC Controller's electrical components, perform all of the following steps
(1) Ensure AC electrical power is disconnected from the unit and the environment is safe.
(2) Inside is the card cage holding the circuit boards. The termination board is held to the card
cage by six screws and is plugged into the System Interface Board near the top edge. Loosen
the screws and pull the termination board out as far as the wires will allow. Let it lie flat
inside the enclosure. Remove the A-C power connector from the front of the termination
board on the lower left hand side.
(3) With a flat-bladed screwdriver at least 8''long, remove two screws at the lower front corners
and two screws at the upper rear corners of the card cage. Carefully lift the card cage up and
out until access is gained to the circuit boards.
MAINTENANCE
SEP 2005
5-31