Passive, Digital, and IR sensors are shipped attached to the S5000. Passive and IR Sensors are one-piece sensors. Digital sensors comprise two parts: the
Sensor Body Assembly and the XCell Sensor. Sensor Body Assemblies must be installed and tightened using a strap wrench. Check the sensor details before
attaching to the S5000 housing. The sensor details are listed on the inside of the XCell Sensor. Unscrew the XCell Sensor from the sensor body assembly and
check the label on the inside for gas type, range,
configuration ordered, serial number, and firmware revision number.
3.3 Product Installation Check List
Before Installation
Review national electrical codes
Review local procedural and building codes
Determine optimum transmitter placement
Determine wire requirements
Determine mounting hardware requirements
Review approvals and ensure suitability for installation
Mounting
Attach appropriate sensor to housing or junction box (see 3.4.3 Sensor Orientation for proper sensor orientation)
Mount transmitter or junction box using appropriate mounting hardware
Confirm free air flow around the sensor
3.4 Mounting
Refer to 9 Appendix: General Certification Information before installation. Some toxic gases are provided in a fritless sensor housing. The fritless
sensor housing is labeled as Div 2 or Zone 2 and is approved for Div 2 or Zone 2 installations only. The protection method is Nonincendive or Type n respectively.
Ensure all
Failure to follow this warning can result in serious personal injury or death.
3.4.1 Sensor Mounting Location
The best location for the transmitter and the sensor may not be the same location. Sensors should be placed in a location where a gas leak is most likely to be
detected. When the best sensor placement would not allow the transmitter display to be easily viewed or accessed, a remote junction box can be used to mount
the sensor remotely from the transmitter,
allowing both to be installed in the optimum location. Two main factors should be considered when choosing a sensor location. The first is the density of the
target gas relative to the air. Gases, such as propane, that are heavier than air should be placed near ground level while gases that are lighter than air should be
placed above potential leak sources. Optimum sensor placement will depend on the surrounding processing equipment, such as pipes, valves, or turbines. MSA
offers a gas and flame mapping service that systematically evaluates potential sources of leaks and recommends detector quantity and placement to create the
most effective detection system.
3.4.2 Transmitter Mounting Location
The transmitter display should be mounted so that the screen is visible and easily accessed after installation. The electronics assembly inside the enclosure have
one orientation inside the cylindrical housing. Take care to position the conduit entries and display so that the display is read in the correct orientation.
3.4.3 Sensor Orientation WARNING!
WARNING!
Mount the IR Sensor with the sensor inlet fitting extended horizontally from the main enclosure (see Figure 10 ) to preventthe build-up of particulate or liquid
matter on the monitor’s optical surfaces. Mount the digital sensor with the sensor inlet fitting (see Figure 11 ) pointed downward; otherwise, the inlet may become
clogged with particulate matter or liquids.
Failure to follow this warning can result in serious personal injury or death.
Sensor orientation will depend on the sensor type. If mounting an IR Sensor, whether locally on the transmitter or via remote junction box, the sensor should be
mounted horizontally. If the IR Sensor is not mounted horizontally, the sensor will be prone to more frequent beam blocking issues due to accumulated dust and
condensation on the surface of the
IR Sensor. Figure 10 shows the correct and incorrect mounting orientations for the IR Sensor.
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