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Chapter 1
General Information
The Chillgard LS Refrigerant Monitor provides a continuous indication of
a refrigerant concentration in air. It is capable of monitoring a refrigerant
from 0 to 1000 parts per million (ppm). Each instrument is factory-
calibrated to a certain full-scale value of a specific refrigerant.
All Chillgard LS Refrigerant Monitors use infrared photo-acoustic
sensors. These sensors give an indication of refrigerant levels without
requiring oxygen to be present. Also, the sensors are not poisoned or
degraded in the presence of most silicon or sulfur compounds.
Each Chillgard LS Refrigerant Monitor is placed in an area where a
refrigerant is anticipated or must be controlled. The Monitor operates in
either the Diffusion style (gas diffuses into the sensor through the
opening located at the bottom of the unit) or the Pumped style (an
internal pump draws the sample into the sensor from a remote location).
The gas sensor determines the refrigerant concentration and outputs an
electrical analog signal proportionate to the concentration.
The Chillgard LS Refrigerant Monitor contains all components
necessary to properly sample an area or duct for a refrigerant.
This manual describes all of the various Chillgard LS Refrigerant
Monitors, although your monitor may not be equipped with all of the
options available.
To help determine what options are on your unit, see the identification
label on the side of the instrument (FIGURE1-1).
Figure 1-1. Identification Label Location
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