Warnings ������������������������������������������������������������������������������5 2�1�1 Mounting The Xnx ® Universal Transmitter - Honeywell XNX Technical Manual

XNX Universal Transmitter
Safety
Read and understand this manual before installing, operating, or
maintaining the XNX Transmitter� Pay particular attention to the
warnings and cautions below� All of the warnings and cautions
shown here are repeated in the appropriate sections of the
manual
�
Warnings: Identify hazardous or unsafe practices which could
result in severe injury or death.
Warnings
• Installation must be in accordance with the recognized standards of the
appropriate authority in the country concerned.
• Access to the interior of the sensor, when carrying out any work, must
only be conducted by trained personnel.
• Before carrying out any work ensure local regulations and site
procedures are followed. Appropriate standards must be followed to
maintain the overall certification of the sensor.
• To reduce risk of ignition of hazardous atmospheres, conduit runs must
have a seal fitting connected within 18 inches (45 cm) of the enclosure.
• To reduce the risk of ignition of hazardous atmosphere, disconnect the
equipment from the supply circuit before opening the sensor enclosure.
Keep assembly tightly closed during operation.
• Never open the XNX enclosure under power unless the area is known to
be non hazardous.
Introduction
• The sensor must be earthed/grounded for Intrinsic Safety, electrical
safety and to limit the effects of radio frequency interference. Earth/
ground points are provided inside and outside the unit. EMI note
for applications using shielded cable: Cable shield terminations
must be made at the cable glands with suitable EMI type glands.
Avoid terminating cable shields at the Earth ground lug inside the
XNX enclosure. In cases where wiring is in pipe, a shielded cable is
not required. The external terminal is only a supplemental bonding
connection where local authorities permit or require such a connection.
• Take care when handling EC sensor cells as they may contain corrosive
solutions.
• Do not tamper or in any way disassemble the sensor cells.
• Do not expose to temperatures outside the recommended range.
• Do not expose the sensor to organic solvents or flammable liquids.
• 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. Do NOT
incinerate sensors as they may emit toxic fumes.
• High off-scale readings may indicate an explosive concentration of gas.
• Verify all outputs, including display, after installation, after service
events, and periodically to ensure the safety and integrity of the system.
• Do not use the XNX Universal Transmitter in oxygen-enriched
atmospheres. Concentrations displayed will be adversely affected by
oxygen depletion.
• After changing parameters with a handheld device, verify that the
parameter settings are correct at the transmitter.
• The factory-set passcodes must be reset to prevent unauthorized
access to the transmitter's menus.
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