4-3
The C
alibration Kit contains a ZERO gas scrubber which can be used in
place of a ZERO gas cylinder if the ambient air around the Chillgard RT
contains little or no refrigerant.
CAUTION
The zero gas scrubber must be replaced periodically. The
frequency of replacement depends on the concentration of
the ambient refrigerant vapors.
The SPAN or ZERO cylinders (if needed) may be included with the
Calibration Kit; cylinders shown in TABLE 4-1 are available from MSA:
Table 4-1. RP C
alibration Gases
DESCRIPTION CONCENTRATION PART NO.
R-11 in Nitrogen 100 PPM 803499
R-12 in Nitrogen 100 PPM 804866
R-123 in Nitrogen 100 PPM 803498
R-134A in Nitrogen 100 PPM 803500
R-22 in Nitrogen 100 PPM 804868
R-113 in Nitrogen 100 PPM 804870
Pentane in Nitrogen 0.75% 804532
substitute for Ammonia
Zero Air for CHILLGARD RT only 100% 10028042
R-11 in Nitrogen 30 PPM 812785
R-12 in Nitrogen 30 PPM 812823
R-113 in Nitrogen 30 PPM 813368
R-114 in Nitrogen 30 PPM 813369
R-123 in Nitrogen 30 PPM 812784
R-134a in Nitrogen 30 PPM 812787
R-22 in Nitrogen 30 PPM 812786
R-500 in Nitrogen 30 PPM 813370
R-502 in Nitrogen 30 PPM 813371
100 PPM 803500 R-404a (use R-134a in
Nitrogen as substitute)
Become familiar with the Calibration Kit components (FIGURE 4-1).
Chillgard RT identification
You must identify your unit as a single-point monitor or a multi-point
monitor for proper calibration gas connection. Refer to FIGURE 4-2 to
help identify your unit.
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