Automatic temperature and humidity regulation – Thermostatic – With indicator or alarm
Patent
1985-07-02
1986-05-27
Tapolcai, William E.
Automatic temperature and humidity regulation
Thermostatic
With indicator or alarm
73 1R, 165 111, G05D 2300
Patent
active
045910936
ABSTRACT:
The present invention calibrates air flow controllers by simulating pneumatic signals present in typical heating, ventilating and cooling systems. The controllers receive pneumatic status signals and in response, operate dampers in the air ducts. Each controller must be set to move the damper among positions for air flow rates between calibrated minimum and maximum air flow positions in the duct. The apparatus connects through air piping to the controller to be calibrated. A variable regulator adjusts a supply of constant pressure air to simulate the pneumatic signal from a thermostat while a second variable regulator simulates the differential pressure signal. Gauges register the simulated signals. A third gauge registers the damper control signal generated by the controller. To calibrate a controller, the thermostat and differential air pressure signals are communicated to the controller. The controller dial is then adjusted to provide a pneumatic signal which operates the damper.
REFERENCES:
patent: 3890836 (1975-06-01), McKenzie
patent: 4334275 (1982-06-01), Levine
patent: 4352349 (1982-10-01), Yoho
E-Zee Company
Tapolcai William E.
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