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Instruction Manual
748374-F
March 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Appendix A. Menu Structure 7-3
Model NGA2000 TO2
From the Analyzer Diagnostics menu, all ana-
lyzer health diagnostic information can be ac-
cessed. Calibration controls are also accessible
from this menu.
The Primary Variable Parameters screen pro-
vides details on the sensor, and advises the cur-
rent status of the sleep mode. If the oxygen
concentration exceeds 100 ppm, the sleep
mode timer begins counting. At the end of 45
minutes, if the concentration has not dropped
below 100 ppm, the Analyzer Module will go into
sleep mode to protect the sensor from damage
due to high oxygen exposure.
The Advanced / Expert Calibration menu al-
lows access to user calibration screens, and the
factory calibration data screens for viewing and
data entry. The Gas Scale Factor menu is also
accessed from this menu.
It is not recommended to conduct user zero and
span calibration functions since the sensor is
factory calibrated and does not exhibit detect-
able degradation of calibration over time. The
risk of erroneous calibration due to inaccurate
gases is greater than the potential of factory
calibration change.