Instruction Manual
760000-C
November 2002
2-4 Installation Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA2000 CLD
Zero/span gases should be introduced at
the SAMPLE IN fitting at normal sample in-
let flow rate.
WARNING
At no time should ozonator gas pressure
exceed 2070 hPa-gauge (30 psig). Dam-
age to internal components may occur if
this pressure level is exceeded.
Leak Test
The CLD Analyzer Module is completely
tested at the factory for gas leakage. The
user is responsible for testing for leakage
only at the inlet and outlet fittings on the
rear panel. Periodically, the user should do
an internal leak test (with a test procedure
chosen by the user).
Contaminants
White crystal deposits on the windows of
the reaction chamber, and the clogging of
capillaries and vent are usually due to sam-
ple contaminates such as ammonia reacting
with the high ozone levels and NO compo-
nents.
To eliminate the contaminates, the sampling
system should be reworked or a preventive
maintenance program developed (if dropout
is not excessive). Another source of crystal-
line formation is contaminated air.
2-5 ELECTRICAL CONNECTIONS
NOTE
Electrical installation must be in compliance
with National Electrical Code (ANSI/NFPA
70) and/or any applicable national or local
codes.
Refer to Figure 2-3, page 2-4. Two electrical
connections are required on the Analyzer Mod-
ule: POWER and NETWORK. On the Analyzer
Module, two NETWORK connectors are avail-
able, either of which is appropriate for:
1. Interconnection with the Backplane of the
Platform. (See instruction manual for the
NGA 2000 Platform).
2. "Daisy-chaining" with other NGA 2000 com-
ponents.
Connect Analyzer Module POWER to 24 VDC,
120 Watt power source, either the Platform or
external power source.
Figure 2-3. Front Panel Controls and Electrical Connections
Metering Valve
Flow
Balance
Sample
Regulator
250 V
24V
1 +
2 -
3 GND
LON
1
LON
2
CLD
T 6A
Regulator Adjust
Slot
Network1 Connection
Network2 Connection
Power Connection
Fuse
