Instruction manual

Instruction Manual
760006-A
September 2001
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 7-1
Model NGA 2000 Platform
SECTION 7
MAINTENANCE AND SERVICE
DANGER.
ELECTRICAL SHOCK HAZARD
Do not operate without doors and
covers secure. Servicing requires
access to live parts which can cause
death or serious injury. Refer serv-
icing to qualified personnel. For
safety and proper performance this
instrument must be connected to a
properly grounded three-wire source
of power. Platforms with two power
supplies require disconnection of
BOTH power cords to remove power
from the platform.
WARNING.
POSSIBLE EXPLOSION HAZARD
This equipment may contain mod-
ules used in the analysis of sample
gases which may be flammable. If
used for analysis of such gases, the
module must be protected by a con-
tinuous dilution purge system in ac-
cordance with Standard ANSI/NFPA
496-1993, Chapter 6.
WARNING.
PARTS INTEGRITY
Tampering or unauthorized substitu-
tion of components may adversely
affect safety of this product. Use
only factory documented compo-
nents for repair.
CAUTION.
STATIC-SENSITIVE COMPONENTS
Circuit boards in this instrument are
static-sensitive. Take all static pre-
cautions when handling them.
7-1 MAINTENANCE OVERVIEW
The components that may require removal or
replacement during the life of the Platform in-
clude:
• Fuses (Power Input Module)
• Power Supply Board (Backplane)
• Platform Controller Board (Back-
plane)
• Front Panel Assembly
• I/O Modules
Analyzer modules are covered under their
own manuals.
7-2 FUSE REPLACEMENT
To replace the general protection fuses of the
Platform, do the following:
1. Remove the power cord from the back of
the Platform. (Remove both power cords
in the case of the dual Platform.)
2. Open the fuse holder door located on the
base of the AC power cord socket on the
Power Input Module.
3. Remove the current fuses by pressing
each individual restraining tab toward its
holder and pulling. There are two indi-
vidual fuse holders in the receptacle.