1-9
Applications
The Chillgard RT Monitor is factory-calibrated for a particular refrigerant
gas. When calibrated, the Chillgard RT System is used in a wide variety
of industrial applications, such as:
• detection of refrigerant gases leaking into the atmosphere
• ambient air monitoring for health and safety purposes
Sensor Selectivity*
The Chillgard RT Refrigerant Monitor is factory-calibrated for your
particular refrigerant gas (TABLE 1-3). The system is highly selective to
refrigerant gases in air; however, the system also responds to other
gases (interferants). See TABLES 1-2 through 1-11* for typical cross-
sensitivities. Actual cross-sensitivities vary from instrument to
instrument. *Typical cross-sensitivities not verified or investigated by UL.
NOTE: These cross-sensitivity values do not apply to a multi-refrigerant
unit where the optics have been adjusted to detect a variety of
refrigerants.
If it is not known whether the gas to be detected is an interferant gas,
contact MSA at 1-800-MSA-INST.
Table 1-2. Typical Chillgard RT System for
R-11 Cross-Sensitivity Response Data
GAS CONCENTRATION (PPM) EQUIVALENT PPM R-11
Acetone 100 14
Methyl Ethyl Ketone 100 32
Methanol 1000 130
iso-Propanol 500 400
Methylene Chloride 100 0
Xylene 100 0
Ammonia 50 0
R 113 100 25
R 11 100 100
R 22 100 30
R 12 983 490
R 134 A 100 20
R 123 100 3
Propane 0.6% 18
Ethylene 500 20
TEST CONDITIONS: Calibrated 0-1000 PPM R-11 in N
2
; Temperature: 25°C
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