Emerson NGA 2000 Computer Accessories User Manual


 
5 - 10
NGA 2000
90003749(1) [NGA-e (Software CLD 2.3/MLT 3.1.X)] 04/98
Line of variables "Calibration averaging time":
The value in this line will determine the time range the analyzer will use to get the
calibration average. The precision will be better with longer times.
Options: 0 to 60 s; Standard: 5 s
Line of variables "Calibration failure alarm":
The accuracy of the signals may go down after a long use of the analyzer. If you will set
up "Yes" in the line "Calibration failure alarm", a warning message will display a wrong or
impossible calibration.
Line of variables "Cal. failure error allowed":
If the setpoint will differ more than allowed by the value in this line, a warning message
may be displayed. To enable this warning, "Yes" has to be set up in the line "Calibration
failure alarm".
Options: 5 to 80%; Standard: 50%
Line of variables "Calibration time out":
If the signal will not be stable after the time out set up in this line, a warning message may
be displayed. To enable this warning, "Yes" has to be set up in the line "Calibration failure
alarm".
Options: 0 to 300s; Standard: 60s
Lines of variables "Zero ranges/Span ranges":
TOGETHER: All four ranges will be calibrated automatically one after another by zero
and span gas.
SEPARATELY: Only the range selected will be calibrated by zero and span gas. You
have to set up this parameter, if you want to calibrate with manual factors (see chapter.
5.1.1 p. 5-6/7).
Note: Only, if it is possible to get a span gas setpoint between 10% and 110% of each
end of range, you may calibrate all ranges together. Otherwise, only the ranges with
this condition will be calibrated automatically. The other ranges will be ignored!