Instruction manual

Instruction Manual
HAS64E-IM-HW
September 2008
NGA 2000 HFID
3 - 9OperationEmerson Process Management GmbH & Co.OHG
3-5 ROUTINE OPERATION
a) Operation
After case, oven, and sample temperature stabilization,
calibration, and binding, proceed as follows:
Supply heated sample gas to SAMPLE INLET. Adjust
external flow controller or throttle valve so that the sample
inlet pressure is between 345 to 620 hPa-gauge (5 to 9
psig.), 485 hPa-gauge (7 psig.) nominal. The reading
on the SAMPLE pressure gauge and sample and oven
temperatures should be the same as that used during
adjustment of the zero and span calibration gas control.
Adjust the Range Number setting. The Analyzer Mod-
ule will now automatically and continously output the
measured hydrocarbon content of the sample. Output
is in terms of particular hydrocarbon present in the span
gas. Note that readings obtained during operation de-
pend on the concentration of total hydrocarbons in the
sample.
The Analyzer Module will not allow the user to increase
the upper limit of a range beyond the "maximum range"
software setting.
Figure 3-10: Measure Mode Display
After starting up the Analyzer Module, the Measure Mode
Display is displayed as shown in figure 3-10.
After initial startup, or startup following a prolonged shut-
down, the Analyzer Module requires about one day´s
continous operation to stabilize. For several days after-
wards, calibrate daily. The frequency of subsequent
calibrations can be reduced as experience dictates,
consistent with the accurancy requirements of the par-
ticular application.
To now check back physical parameters of the HFID
Analyzer Module with the values defined in your Test
Data Sheet, that you received with the analyzer, you
have to select the "Physical Measurements"-Menu.
You will find excerpt of a Test Data Sheeta as an ex-
ample on the next page in figure 3-12.
Enter the diagnostics menu "Physical Measurements"
as follows, using the softkeys F1 through F5:
Main (Menu)...
Expert Controls and Setup...
Analyzer Module Controls...
Physical Measurements...
Figure 3-11: Physical Measurements Display
The menu "Physical Measurements" lets you monitor
physical measurement parameters of the HFID analyzer.
b) Sensitivity
If maximum sensitivity is required from the HFID Ana-
lyzer Module, use an optimum combination of settings
on the FUEL, and AIR pressure regulators. Settings must
be determined experimentally, but the curves in Figures
3-14 and 3-15 may be used as guides.
c) Shutdown
During shutdown, always turn off fuel gas first, then the
air and sample gases. The flame can also be turned off
by setting Ignition System Enable to "Off" on the Light
Flame menu (under Basic Controls, Figure 3-7). Sub-
sequently, remember to set Ignition System Enable to
"On" before attempting to ignite the flame.
Line#1
HOME ESCAPE INFO
0.000 ppm
1996 ml/min
400 ml/min
2000 ml/min
340 hPa
1600.3 hPa
1041 hPa
691 hPa
54.0 C
Physical Measurements
Bypass Sample Flow:
Flow lower limit:
Flow upper limit:
Sample Pressure:
Fuel Supply Pressure:
Burner Air Pressure:
Purge Gas Pressure:
Case temperature:
HFID
7.50
ppm THC
0.00 10.00Range 1
340 hPa
51.4 C
524401
Display Status... Main... Channel BasicCal
Sample pressure:
Case temperature:
Flame status:
Raw signal:
490.0
61.0
ON
900000
50.0
47.0
100000