Technical Manual

XNX Universal Transmitter
Section 3 - Calibration
96
Sensor Reading
at Current Settings
Calibration Gas
Concentration
Figure 210. Span adjustment calculation
7. Select ✓
✖
to return to the Gas Calibration menu. If the
calibration is not successful, the Span Failed screen will be
displayed.
Arrow indicates
gas values too low
Selecting ‘✔’ returns to
the Span Concentration
screen
Figure 211. Span Failed screen
Select ✓
✓
to return to the Span Concentration screen to repeat
the span calibration.
Select
✖
to exit Span Calibration and return to main
Calibrate screen. If Span Calibration is exited, the previous
calibration values will be used. Select
✓
✓ to return to the Span
Concentration screen.
If the calibration is successful, the Span Passed screen will be
displayed.
Figure 212. Span Passed screen
8. Exit the Calibration Menu. After the zero and span
calibrations have been successfully completed, the user will
be prompted to:
• Exit and turn alarm and fault inhibit off,
• Exit and leave the transmitter in inhibit mode. or
• Not exit
Figure 213. Calibration exit options
Warning: When the XNX transmitter is placed in Inhibit Mode, alarms are
silenced. This will prevent an actual gas event from being reported. Inhibit Mode
must be limited to testing and maintenance only. Exit Inhibit Mode after testing
or maintenance activities.