Fixed Appliances and Socket Circuits
... connected to the electrical supply. Each appliance is equipped with a plug and a flexible cord which for safety reasons should not be longer than two metres. The plug is pressed into the socket outlet thereby connecting the appliance to the supply. There are two types of socket outlet allowed by the ...
... connected to the electrical supply. Each appliance is equipped with a plug and a flexible cord which for safety reasons should not be longer than two metres. The plug is pressed into the socket outlet thereby connecting the appliance to the supply. There are two types of socket outlet allowed by the ...
Simple temperature measurement using a PT100 loop
... connected to a multitude of control or monitoring equipment. The temperature transmitter’s (4 to 20) mA output current will be configured to represent a range of temperature from the PT100 probe. For example a temperature range of (0 to 100) °C can be represented by (4 to 20) mA by the output of the ...
... connected to a multitude of control or monitoring equipment. The temperature transmitter’s (4 to 20) mA output current will be configured to represent a range of temperature from the PT100 probe. For example a temperature range of (0 to 100) °C can be represented by (4 to 20) mA by the output of the ...
Lab7 Temperature Measurement
... RTD is nearly linear over a wide range of temperatures and can be made small enough to have response times of a fraction of a second. The classical resistance temperature detector (RTD) construction using platinum was proposed by C.H.Meyers in 1932. This requires an electrical current to produce a v ...
... RTD is nearly linear over a wide range of temperatures and can be made small enough to have response times of a fraction of a second. The classical resistance temperature detector (RTD) construction using platinum was proposed by C.H.Meyers in 1932. This requires an electrical current to produce a v ...
The reversing valve is the component of a heat pump system that
... reversing valves. This is most often caused by contaminants in the valve body caused by using unclean refrigerant lines, or excessive flux and solder material. Reversing valves that internally leak also cause problems but are rare. A temperature check at the tubes with an electronic temperature tes ...
... reversing valves. This is most often caused by contaminants in the valve body caused by using unclean refrigerant lines, or excessive flux and solder material. Reversing valves that internally leak also cause problems but are rare. A temperature check at the tubes with an electronic temperature tes ...
Thermostat
A thermostat is a component of a HVAC control system which senses the temperature of a system so that the system's temperature is maintained near a desired setpoint. The thermostat does this by switching heating or cooling devices on or off, or regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature.A thermostat may be a control unit for a heating or cooling system or a component part of or air conditioner. Thermostats can be constructed in many ways and may use a variety of sensors to measure the temperature. The output of the sensor then controls the heating or cooling apparatus. A thermostat may switch on and off at temperatures either side of the setpoint. This prevents equipment damage from frequent switching. Thermostats are also used in many household appliances. A thermostat is an instance of a ""bang-bang controller"" as the heating or cooling system output is not proportional to the difference between actual temperature and the set temperature; the equipment runs at full capacity until the set temperature is reached, then shuts off. Increasing the difference between the thermostat setting and the desired temperature therefore does not shorten the time to achieve the desired temperature.The term is derived from the Greek words θερμός thermos, ""comfortable"" and στατός statos, ""climate controlled"".