XNX Universal Transmitter
Section 4 - Maintenance
104
Warning:
When servicing or replacing sensors, reduce the risk of ignition
of hazardous atmosphere by declassifying the area or disconnecting the
equipment from the supply circuit before opening the sensor enclosure.
Keep the assembly tightly closed during operation.
Warning:
Take care when handling sensors as they may contain corrosive
solutions. Do not tamper or in any way disassemble the sensor cell. Do not
expose to temperatures outside the recommended range. Do not expose
the sensor to organic solvents or flammable liquids.
Warning:
At the end of their working lives, sensors must be disposed of in an
environmentally safe manner, in accordance with local waste management
requirements and environmental legislation. Sensors should NOT be
incinerated as they may emit toxic fumes.
Warning:
Verify all outputs, including display, after installation, after service
events, and periodically to ensure the safety and integrity of the system.
Caution:
The following procedure should be followed carefully and
performed only by suitably trained personnel. A fault condition will be
signaled by the sensor if it is removed with the unit under power.
Note:
If the power-on self-test was skipped during maintenance activities,
restart the transmitter.
4.1 MPD Sensor Cartridge Replacement
Using Figure 226 as a guide, follow this procedure:
1� Verify that the label on the new sensor is the correct gas
type�
2� Remove power from the transmitter�
3� Unscrew the weatherproof cover (if equipped), loosen the
retainer locking screw, and unscrew the sensor retainer�
4� Remove the old sensor by pulling without twisting�
5� Slide the replacement cell into the MPD body taking care
to align the tab with the alignment slot, then press the cell
firmly to seat it into the body�
6� Refit the sensor retainer, tighten the locking screw and refit
the weatherproof cover (if equipped)�
7� Recalibrate the sensor following the procedures in
Section
3�2�2
�
Cell Alignment Slot
Sensor Cell
IR or Cat Bead
Sensor Retainer
and Locking Screw
Internal O-ring
(critical to performance times)
Figure 226. Removing the Plug-in Sensor
Summary of Contents for XNX
Page 1: ...Technical Manual XNXTM Universal Transmitter ...
Page 2: ......
Page 6: ...XNX Universal Transmitter Table of Contents 4 Table of Contents ...
Page 11: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 9 1 Introduction ...
Page 91: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 89 3 Calibration ...
Page 104: ...XNX Universal Transmitter Section 3 Calibration 102 ...
Page 105: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 103 4 Maintenance ...
Page 128: ...XNX Universal Transmitter Section 5 Warnings Faults 126 ...
Page 129: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 127 6 Specifications ...
Page 152: ...XNX Universal Transmitter Section 6 Specifications 150 Figure 232 XNX BT Configuration ...
Page 161: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 159 7 Control Drawings ...
Page 162: ...XNX Universal Transmitter Section 7 Control Drawings 160 7 1 XNX UL INMETRO ...
Page 163: ...XNX Universal Transmitter Section 7 Control Drawings 161 ...
Page 164: ...XNX Universal Transmitter Section 7 Control Drawings 162 ...
Page 165: ...XNX Universal Transmitter Section 7 Control Drawings 163 7 2 XNX UL CSA FM ...
Page 166: ...XNX Universal Transmitter Section 7 Control Drawings 164 ...
Page 167: ...XNX Universal Transmitter Section 7 Control Drawings 165 ...
Page 192: ...XNX Universal Transmitter Appendix B Modbus Protocol 190 ...
Page 193: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 191 Appendix C Warranty ...
Page 195: ...XNX Universal Transmitter XNX Universal Transmitter Technical Manual 193 Index ...
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