Instruction manual

Instruction Manual
HAS64E-IM-HW
September 2008
NGA 2000 HFID
3 - 5OperationEmerson Process Management GmbH & Co.OHG
3-4 CALIBRATION PROCEDURE
The HFID analyzer module may require periodic cali-
bration with known zero and span gases in order to main-
tain a desire level of analytical accurancy. It is recom-
mended, after initial startup, that the HFID Analyzer Mod-
ule is calibrated at least once every eight hours.
This practice should continue until evidence indicates
that some other interval is more appropriate depending
on the analytical accurancy required.
Calibration is the process of flowing known zero or span
calibration gas into the analyzer for a specified period
(averaging time), after which the analyzer will automati-
cally set its zero or span factors so that the concentra-
tion measurement equals the calibration gas value. A
limit can be set, beyond which any attempt by the ana-
lyzer to reset its concentration measurement will cause
a warning alarm. In this case, user intervention would
be required to reset the alarm and attempt another cali-
bration.
a. Calibration Setup
Calibration Gas List
This menu is used to set the concentration values of the
calibration gases for each range, the Operational Sample
Pressure and the Calibration Gas HC Response Fac-
tor.
Main (Menu)...
Analyzer and I/O expert controls & setup...
Analyzer module setup...
Calibration gas list...
Common HC factors are:
Methane (CH
4
): 1.0
Ethane (C
2
H
6
): 1.9
Propane (C
3
H
8
): 3.0
These factors are not used to compensate the reading,
but are used to select the proper preamp sense resis-
tor.
In case that measuring ranges differ from ordering code,
put in the measuring ranges:
Main (Menu)...
Analyzer and I/O, expert controls & setup...
Analyzer module setup...
Gas measurement parameters...
Range settings...
Figure 3-4: Range Settings Menu
NOTE
In case that only one measuring range is in use,
we suggest to set all other measuring ranges to
the same value to prevent calibration failure. When
doing so, set also all test gas values to the same
value.
Figure 3-3: Calibration Gas List
Range Settings
Minimum Range:
Maximum Range:
Range 1 lower limit:
Range 1 upper limit:
Range 2 lower limit:
Range 2 upper limit:
Range 3 lower limit:
Range 3 upper limit:
Range 4 lower limit:
Range 4 upper limit:
Line#1
HOME ESCAPE INFO
0.000 ppm
10.0 ppm
1000.0 ppm
0.0 ppm
10.0 ppm
0.0 ppm
25.0 ppm
0.0 ppm
100.0 ppm
0.0 ppm
250.0 ppm
Pressure limits...
Line#1
HOME ESCAPE INFO
0.000 ppm
Calibration Gas List
Zero gas - range 1:
Span gas - range 1:
Zero gas - range 2:
Span gas - range 2:
Zero gas - range 3:
Span gas - range 3:
Zero gas - range 4:
Span gas - range 4:
Calibration gas HC response factor:
Operational sample pressure:
Calibration...
0.00 ppm
10.00 ppm
0.00 ppm
25.00 ppm
0.00 ppm
100.00 ppm
0.00 ppm
250.00 ppm
1.00
344 hPa