Span Calibration - Honeywell XNX Safety Manual

XNX Universal Transmitter

6.2.2.2 Span Calibration

NOTE:
If a Span Calibration is not required, select
Calibration and return to the Calibration Menu.
1. When the Zero Gas Calibration is complete, the Span
Concentration screen appears. The gas concentration for the
Span Gas Calibration can be changed.
If the Span Calibration is skipped, the Gas Calibration screen
displays.
Figure 7. Span Gas Concentration Screen
2. Enter the concentration of the span gas by selecting
choose the first digit and use the
decrement the values. Use
to the next digit. Continue until all digits have been selected.
Sensor Reading
at Current Settings
Figure 8. Span Calibration Screen
3. Apply the span gas. As the sensor detects the gas and the
concentration increases, the values displayed will reflect the
changing concentration. When the concentration values are
stable select to perform the span. The Span Calibration
✓
process also determines whether the sensor is within the
proper range to accurately detect the target gas.
Proof Testing Procedure
to skip the Span
✖
switches to increment or
to accept the new value and move
✓
Calibration Gas
Concentration
Selecting will cancel the span calibration and return to the
✖
Gas Calibration Menu.
4. When the sensor has completed the calibration and the span
algorithms have determined that it is within range, the Span
Passed screen will appear.
to
✓
9
Figure 9. Span Passed Screen
Adjusting