How to Read a Pressure Temperature Chart

Refrigerants are essential to the functioning of an air conditioner.
••• window air conditioner image by Aaron Kohr from Fotolia.com

When repairing refrigerators, air conditioners and other machines that contain refrigerants, service technicians work with pressure temperature, or PT, charts. PT charts show the relationship between pressure and temperature of given refrigerants. By changing the pressure of the refrigerant, the technician can set its temperature to a given level.

    Put the pressure temperature chart in front of you.

    Determine whether temperature or pressure is provided in the left column.

    Determine the units in which temperature and pressure are measured. Temperature can be measured in either Fahrenheit or Celsius. Pressure, in this context, is typically measured in units called psi, which stands for "pounds per square inch."

    Read the values in the cells. If the left column values represent temperature, then the other cells provide the pressure at which a certain temperature is reached by the refrigerant. If the left column represents pressure values, then the other cells give the temperature readings at which a given pressure is reached.

Related Articles

How to Convert mm Hg to in Hg
How to Figure GPM Water Flow on an Existing Chiller
How to Convert Moles to Pressure
How Does a DP Cell Work?
How to Convert 220 Celsius to Fahrenheit
How to Convert Kilopascals to Joules
How to Convert ATM Pressure to Celsius
How to Calculate Heat Loss During Pipeline Depressurization
Five Different Types of Weather Maps
How to Calculate Molar Heat of Vaporization
Living Cell Characteristics
How to Calculate the Number of Moles of Collected Hydrogen...
How to Calculate Standard Errors
How to Calculate a Temperature Range
How to Get the Fraction Equivalent of a Whole Number
How to Convert Steam Flow to Megawatts
How to Write an Equivalent Fraction With a Given Denominator
How to Calculate Volume at STP
How to Subtract Matrices on Excel
How to Convert Hours & Minutes to Decimals

Dont Go!

We Have More Great Sciencing Articles!