model 2704 controller installation and operation handbook - Soliton

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Controller Applications 2704 Controller 10.3.3. Temperature Control Of An Environmental Chamber The temperature of an environmental chamber is controlled as a single loop with two control outputs. The heating output time proportions electric heaters, usually via a solid state relay. The cooling output operates a refrigerant valve which introduces cooling into the chamber. The controller automatically calculates when heating or cooling is required. 10.3.4. Humidity Control Of An Environmental Chamber Humidity in a chamber is controlled by adding or removing water vapour. Like the temperature control loop two control outputs are required, i.e. Humidify and Dehumidify. To humidify the chamber water vapour may be added by a boiler, an evaporating pan or by direct injection of atomised water. If a boiler is being used adding steam increases the humidity level. The humidify output from the controller regulates the amount of steam from the boiler that is allowed into the chamber. An evaporating pan is a pan of water warmed by a heater. The humidify output from the controller humidity regulates the temperature of the water. An atomisation system uses compressed air to spray water vapour directly into the chamber. The humidify output of the controller turns on or off a solenoid valve. Dehumidification may be accomplished by using the same compressor used for cooling the chamber. The dehumidify output from the controller may control a separate control valve connected to a set of heat exchanger coils. 10-10 Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00
2704 Controller Controller Applications 10.4. TO VIEW AND ADJUST HUMIDITY PARAMETERS Do This This Is The Display You Should See Additional Notes 1. From any display press as many times as necessary to access the page header menu This selects the page header which contains the humidity parameters 2. Press or to select ‘HUMIDITY’ 3. Press to display the parameter list Read only display of Dew Point 4. Press or to scroll to the required parameter in the list 5. Press to select the parameter 6. Press or to change the value 7. Repeat this procedure for all Humidity parameters . The full list of parameters available under this list header is shown in the following table … Installation and Operation Handbook. Part No HA026502 Issue 1.0 Apr-00 10-11
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2704 Controller Contents MODEL 2704
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2704 Controller Introduction 1. Cha
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2704 Controller Introduction ➃
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2704 Controller Introduction 1.4.1.
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2704 Controller Installation 2. CHA
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model 2704 controller installation and operation handbook - Soliton

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