Precautions
2.2. Temperature (& Humidity) Control and Instrumentation
2.2.1. Temperature (& Humidity) Control
The Criterion Series employs a BTHC system to control temperature and humidity. “BTHC”
stands for Balanced Temperature and Humidity Control.
The BTHC system balances temperature and humidity inside the chamber to reproduce the
desired conditions. This is done by continuously controlling the capacity of a cooler
(dehumidifier) of high heat load, and a heater and humidifying heater * of low heat load, in real-
time.
The central unit, which controls everything, is the temperature (& humidity) controller. The
instrumentation acts as the user interface.
*Not provided on Temperature-Only chambers
Fig. 2.1. Principle of BTHC System
Temp/Humid
Sensor
Heater
Motor
Cooler
Humidifier
Summary of Contents for BTL-433
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Page 17: ...Criterion Series Benchtop User s Manual 14...
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Page 48: ...Criterion Series Benchtop User s Manual 45 8 Appendix 8 1 Specifications...