Specifications

Heated Flame Ionization Detector Analyzer Module
Rosemount Analytical NGA 2000
748414-A
August 1999
19
STARTUP AND OPERATION
3
The self-test can be repeated at any time by activating the TEST softkey in the Self
Test Results menu.
8. Set the desired oven setpoint in the range of 93°C to 204°C (200°F to 400°F).
9. Wait for the Purge Air green LED to illuminate.
10. Introduce the remaining supply gases. Perform leak check. (See Specifications page(s)
in the Preface section of this manual)
11. Set and verify the internal gas pressures.
INTERNAL PRESSURE REGULATOR TYPICAL OPERATING PRESSURES
B
URNER
A
IR
965 to 1103 hPa-gauge (14 to 16 psig)
F
UEL
1516 to 1723 hPa-gauge (22 to 25 psig)
S
AMPLE
(
NON
-
ADJUSTABLE
)
206 to 290 hPa-gauge (3.0 to 4.0 psig)
Purge air of the following specifications must be present:
F
LOW
: 16 to 18 L/min.
S
UPPLY
P
RESSURE
: 689 to 1378 hPa-gauge (10 to 20 psig)
Noncompliance could cause damage to the module. At the very least, the module's
safety system, which requires a certain volume of purge air flowing through the case
before allowing burner ignition, will not allow the instrument to operate. The lowest
purge air flow/pressure setting possible during burner operation is preferable. Thus, the
user should set the external purge air pressure initially at 689 hPa-gauge (10 psig).
Check the Miscellaneous Control Parameters screen under Technical Diagnostics, and
note whether the Purge Gas (switch) variable is "ON." If it is "OFF," increase purge air
supply by 69 hPa-gauge (1 psig), and recheck the Purge Gas variable until it reads
"ON." DO NOT EXCEED 1378 hPa-GAUGE (20 PSIG). If the maximum setting is
reached, and the Purge Gas variable does not read "ON," contact factory. If the safety
system is initiated successfully (Purge Gas variable is "ON"), continue with the
remainder of the startup procedure.
NOTE
Do not restrict the PURGE OUT port and the pressure relief valve. They must be
vented to atmospheric pressure.