Table 4-1. RP Calibration 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
Become familiar with the Calibration Kit components (FIGURE 4-3).
Exercise care during the span calibration to ensure that the unit can
accurately detect refrigerant gas. Improper calibration can cause improper
readings across the full-scale range of the monitor.
Calibration Procedures
Preparation for Calibration
To verify the instrument is operating properly and to make initial
calibration adjustments, perform the following:
1. Remove the light gray cover to open the enclosure.
Do not remove the cover unless the instrument is protected from
splashing, spraying, or dripping water; otherwise, damage to the internal
components may result.
2. Deactivate the equipment connected to the outputs, or disconnect
the wiring to the outputs.
If any control instruments connected to the Chillgard LS Refrigerant
Monitor are wired to external devices (e.g., horns, exhaust fans, and fire
suppression systems), these devices may activate while adjustments or
repairs are performed during the following procedures.
To prevent activating these devices while adjusting the Chillgard LS
Refrigerant Monitor, disconnect the wiring from the relay. Return all wiring
to the relay when the calibration procedure is completed.
"!
CAUTION
"!
WARNING
"!
CAUTION
4-8
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