The Internal Multipoint Sequencer Unit - MSA Chillgard RT Instruction Manual

• Allows refrigerant gas detection in applications where contaminants
or interferants preclude use of other techniques
• Provides a digital display; if it is a multi-point monitor, it also shows
the point number currently being sampled by the unit
• Is also used for applications requiring long-term stability and low
maintenance
• Is factory-calibrated to the full scale value of refrigerant gas
• Is compensated for the relative humidity of the gas to give
excellent zero stability and enable alarms at refrigerant gas levels
as low as 3 ppm.
• Operates over a wide temperature range
• Has front-panel windows for viewing:
• Gas concentration
• Diagnostics
• Alarm Conditions
• Is highly selective to enable operation in:
• Areas with varying humidity
• Areas containing other contaminants.
• Comes standard with:
• Four sets of relay contacts
• Two completely independent outputs:
0-10 V
4-20 mA
• One input: 4-20 mA, assignable to the ALARM relay
• RS 232 output (see Appendix C for more information).

The Internal Multipoint Sequencer Unit:

• Allows a single Chillgard RT unit to monitor up to four or eight
areas or locations, if equipped
• Each point is capable of sampling from remote areas up to 500
feet (152 m) from the Chillgard RT unit
• Contains all necessary flow components (excluding end-of-line filter
and sampling line) to properly sample four or eight areas and
indicate the gas or vapor concentrations.
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