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XNX Universal Transmitter Quick Start Guide

This section describes how to calibrate MPD ﬂammable sensors ﬁtted to the

XNX. The calibration adjustments are made on the XNX’s display and gassing is

performed at the sensor. This may be locally or remotely located.

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.

Figure 49. Flow adaptor

Reverse the cap removal procedure. The following diagram shows the Flow

Adaptor accessory ﬁtted to the MPD.

Figure 50. MPD with ow adaptor

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8.1forbothZeroandSpan

calibrations.

Honeywell XNX User Manual

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