Span Calibration - Honeywell XNX Quick Start Manual

Span Calibration

Note:
If a Span Calibration is not required, select the
and return to the Calibration menu.
4. When the Zero Calibration is complete or it is skipped, the Span
Concentration screen appears to indicate the concentration value of the
gas used for calibration.
5. Select
decrement the values. Select
digit. Continue until all 3 digits have been selected.
Sensor Reading
at Current Settings
6. Select
concentration increases, the sensor reading values in the display will change
to reflect the changing concentration.
7. When the concentration values stabilize, the gas concentration as read by
the installed sensor is stable. At this time, the gas readings are taken by the
sensor. The Span Calibration process also determines whether the sensor
is within the proper range to accurately detect the target gas.
8. When the sensor has completed the calibration and the span algorithms have
determined that it is within range, the Span Passed screen will appear.
If the calibration is not successful, the Span Failed screen will display. Selecting
will return to the Span Concentration screen to begin the span calibration again.
will exit Span Calibration and return to the Main Calibrate screen.
Arrow indicates
gas values too low
Once the Zero and Span calibrations are completed successfully, the XNX will exit
the calibration procedure. Before returning to the Gas Calibration menu however,
the user will be prompted to Exit and turn alarm and fault inhibit off. The user can
Exit and leave the XNX in inhibit mode, or do not exit.
44
Figure 44. Span Gas Concentration Screen
to choose the first digit and use the
Figure 45. Span Calibration Screen
then apply the target gas. As the sensor detects the gas and the
Figure 46. Span Calibration Failed
to skip the Span Calibration
to accept the new value and move to the next
Calibration Gas
Concentration
Selecting ' ' returns to
the Span Concentration
screen
XNX Universal Transmitter Quick Start Guide
switches to increment or