As a result of worldwide concerns about ozone depletion and global warming, refrigerants and the people who work with them have come under increasing regulation…
Author: matt
another major environmental concern (Figure 3-2). Do not confuse ozone depletion with global warming. These are two entirely different environmental problems. When compared to ozone…
Ozone is found both in the Earth’s troposphere, which extends from ground level to 7 miles up, and in the stratosphere, which is 7 to…
Magnehelic® differential pressure gauges provide a direct reading of pressure and/or air velocity. These gauges are used to measure filter resistance, air velocity, and furnace…
Manometers (Figures 1-37 and 1-38) are used to measure velocity and static air pressures and gas pressures. Pitot tubes and static pressure tips are probes…
Hygrometers (Figure 1-36) are used to measure the relative humidity in a controlled space. Hygrometers are also commonly called relative humidity meters. See Item 16…
Psychrometrics is the study of air and its properties, including temperature, pressure, moisture, and other characteristics. Control o f these properties is essential for human…
Velometers (Figure 1-32) are used to measure the velocity of airflow. Like the anemometers described previously, velometers are used when evaluating the operation and/or balancing…
Anemometers are used to measure the velocity of airflow. Measurement of air velocity must be performed when evaluating the total operation of an air distribution…
The hermetic compressor analyzer (Figure 1-28) is a single test instrument used to make multiple tests on hermetic compressors. This device eliminates the need for…