Honeywell XNX Quick Start Manual page 47

The following equipment is required:
• Flow Housing (Part No: 1226A0411)
• Test gas
• Regulator
Note:
Zero gas and Span gas should be at roughly the same humidity levels to
avoid erroneous cell responses.
1. At the MPD, remove the Weatherproof Cap if equipped.
2. Fit the Flow Adaptor onto the MPD.
Reverse the cap removal procedure. The following diagram shows the Flow Adaptor
accessory fitted to the MPD.
Note
The Gas Calibration menu is for both Zero and Span Calibration.
3. Connect the Flow Adaptor (using either gas pipe) to the regulated cylinder
containing a known concentration of the target gas at approximately the
sensor alarm point (e.g. 50% LEL Methane in air).
WARNING
As some test gases may be hazardous, the Flow Housing outlet should exhaust
to a safe area.
4. Follow the procedure in Section 6.1 for both Zero and Span calibrations.
5. Apply the target gas to the sensor. Pass the gas through the flow housing
at a rate of between 0.7l/m and 1.0l/m.
XNX Universal Transmitter Quick Start Guide
Figure 47. Flow Adaptor
Figure 48. MPD with Flow Adaptor
47