The HVACR service technician uses an array of tools and test instruments to diagnose problems and evaluate system performance. One tool that is readily available, inexpensive and yet rarely used to its fullest advantage is the pressure-temperature card or P-T Chart.
Proper analysis of the pressure to temperature relationship can help service technicians diagnose a refrigeration system issue quickly. The ChillMaster P-T Chart allows quick pressure to temperature conversion by providing essential refrigerant data to mobile devices. Download the app today in IOS or Android version
App incorporates a user-friendly design
Contractors and technicians will enjoy the P-T Chart’s user-friendly design and precise calculations based on National Institute of Standards and Technology (NIST) Refrigerant Properties. Other features include the ability to customize screens for certain refrigerants and preferred units of measurement.
More than 70 refrigerants (traditional and natural) are featured in the P-T Chart. Extras included with the app - a training article “Using the P-T Card as a Service Tool.”
P-T Charts - Superheat and Subcooling content
- How refrigerant exists in a system
- Basic principles for P-T charts
- Saturated refrigerant
- Measuring Superheat
- Measuring Subcooling
Refrigerant phase change in a basic system
Other helpful resources: