Bacharach PUR-CHEK, Руководство по эксплуатации и обслуживанию

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Pur•Chek
™
Instruction 2100-9000 3
1.5 Functional Overview
Contamination of refrigerants either in storage cylinders or air conditioning systems can lead to component
corrosion, elevated head pressures and system failures when utilized by unsuspecting technicians. The ability
of the technician to determine refrigerant type and purity is severely hampered by the presence of air when
attempting to utilize temperature-pressure relations. The development of various substitute refrigerants further
complicates the ability of a technician to identify refrigerant purity based upon temperature-pressure relation-
ships. The substitute refrigerant blends can also introduce a fl ammability hazard to the technician and the
ultimate end user of the air conditioning system.
The Bacharach Pur•Chek™ Advanced Refrigerant Identifi er provides a fast, easy and accurate means to deter-
mine refrigerant purity in refrigerant storage cylinders or directly in air conditioning systems. The instrument uti-
lizes non-dispersive infrared (NDIR) technology to determine the weight concentrations of refrigerant types R12,
R134A, R22, as well as hydrocarbons. In addition, the unit will indicate the presence of R410A if the refrigerant
tested matches the internal profi le established for virgin R410A. Refrigerant purity is displayed on the LCD
Screen. The user must determine acceptable levels of purity based on their recovery or use standards.
Sample gas is admitted into the instrument through the supplied sample hose and presented to the sensing
device. The instrument provides the user with direct percent by weight concentrations of R12, R134A, R22 and
hydrocarbons. If the sample is determined to be pure R134A, the instrument will provide a direct readout of the
weight percentage of air within the sample. Note that the instrument does not consider air to be a contaminant
since it can be removed by most refrigerant recycling equipment. Since air is not considered to be a contami-
nant, it is possible to read 100% R134A plus 5% air. The instrument only considers the weights of the refriger-
ant and contaminants in the total mixture for R134A as air contamination in R12 and R22 systems causes only
minor performance degradation.
The instrument interfaces with the user with an LCD graphic display, status indicator lamps, push button com-
munication switches and an alarm horn. Alarm indications are provided to alert of instrument fault conditions or
contaminated refrigerant presence. Direct percent by weight concentrations of the sample refrigerant is pro-
vided on the display as well as user directions and prompts. An optional factory-installed printer (Model 2100-
8002) is available to print an on-the-spot analysis report.
The Bacharach Pur•Chek™ Advanced Refrigerant Identifi er provides the refrigerant technician with excellent
knowledge of refrigerant purity and protection against refrigerant contamination and potential fl ammability.