Fire Contingency; Scanner Safety Features; Mechanical Safety Features - Honeywell Experion MX Operator's Manual

2.2.4

Fire Contingency

The radiation source assembly is designed with a failsafe to close the shutter in the event
of a fire. A spring-loaded thermal safety nut forces the shutter closed when the sensor
head is heated.
The primary concern should remain with fighting the source of the fire.
Only authorized and qualified personnel are allowed to service the sensors after such an
event. Unauthorized personnel are not permitted to open the head enclosures.
2.3

Scanner Safety Features

To ensure safe operation a number of features have been developed around the
mechanical, electrical, and sensor radiation subsystems. This section provides an overview
of these safety systems to ensure understanding by the user, and continued proper
operation.
2.3.1

Mechanical Safety Features

2.3.1.1 Beam Covers
Description:
Beam covers are comprised of two parts:
Side panels are located on the upstream and downstream sides of the upper and lower
scanner beams. They may be removed by pushing up the bottom edge to allow them to be
unhooked and pulled away from the beam.
Top cap covers saddle the upper and lower beams. They can be removed by pulling the
lower edge away from the beam on either side to unlatch them from the beam gussets and
• In the event of a fire near the scanner, turn the equipment off and put out the fire;
extinguishing the fire is the highest priority. Authorized and qualified service
personnel must examine the equipment before returning it to service.
•
For systems that have been installed with a radiation gate, the shutter closes and
the heads move offsheet each time the radiation gate is opened. Any failure must
be reported to the authorized and qualified service personnel.
•
Authorized and qualified personnel must verify the shutter mechanism and
interlocks for proper operation every six months.
• A site survey must be performed whenever changes are made to the gauge
operating parameters that might affect the radiation field around the sensor.
•
1 m (3.28 ft) -long side panels
•
2 m (6.57 ft) -long top caps
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SCANNER SAFETY AND LOCAL CONTROLS
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