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Compressor Calorimeter

Tescor’s Automotive A/C Compressor Calorimeters are designed in accordance with Ashrae Standard 23 and ISO Standard 917. The calorimeters are provided with a secondary refrigerant calorimeter vessel and Micro Motion coriolis mass flow sensor to provide accurate and repeatable determination of compressor capacity.

Tescor’s calorimeter system provides the customer with control of such parameters as compressor speed, discharge pressure, liquid temperature or sub-cooling, suction temperature or superheat, and suction pressure. In addition, Tescor offers as an option an oil control loop that allows the user to precisely and accurately control and report the percentage of oil in circulation automatically, in real-time.

The calorimeter systems are designed to provide heat balances within ±2% with a repeatability of ±1%. Tescor offers a standard line of automotive compressor calorimeters up to 16.7 ton capacities.

Refrigerants Tested:

  • R-12, R-134a (Other refrigerants as required)
Capacity Range:

  • Up to 200,000 BTUH (60 Kw) with 10:1 turndown range

Performance Measurement:

  • 2% agreement or better measured mass-flow to calculated mass-flow
  • 1% repeatability of test results


  • Create Tests And Sequences for Automatic Operation
  • User configurable data acquisition channels
  • User configurable calculation channels
  • Loop Calibration Utility
  • Dedicated hardware checkout routine
  • Color coded stability status indicators
  • Stability tolerance adjustment on the fly
  • Time-history graphing capability
  • Automatic Test Report Generation
  • Data File Management and Search Tools

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Compressor Calorimeter