Temperature and humidity controller use

Temperature and humidity controller use

Temperature and humidity controllers include a variety of specifications to control temperature and humidity of different parameters.

Temperature and humidity controller hot spot resistance Pt100: The change of resistance value is achieved by sensing the change in temperature

The temperature and humidity controller calculates the current temperature by confirming the difference in resistance, and the corresponding output standard signal (4-20mA) value can be changed according to the range of hot spot resistance.

Temperature change - resistance - resistance change - temperature transmitter - 4 ~ 20mA signal, the range of Pt100 is -199.9 degrees -600.0 degrees, the temperature and humidity controller converts it into a standard signal, and then corresponds to it. 4 mA is -199.9 degrees and 20mA is 600.0 degrees, and the current temperature can be determined by determining the current output of the transmitter.

There are many types of humidity and temperature controller transmitters. In general, the transmitter sends a signal to the secondary instrument to display the measurement data.

A device that converts a physical method measurement data signal or ordinary electrical signal into a standard electrical signal through output or can be output in a communication network protocol management manner. Generally, it is mainly divided into: temperature/humidity sensor transmitter, pressure transmitter, differential pressure transmitter, liquid level transmitter, current transmitter, power transmitter, flow transmitter, weight transmitter, etc.

Humidity and temperature controller transmitters follow the laws of physics (or experimental mathematical models) to convert changes in physical quantities into standard signals. During normal operation, the current flowing into the protector does not exceed 0.1mA, which does not affect the normal operation of the current transformer. When the voltage between A (or B, C) and N exceeds 150V, BT-CTB shorts A (or B, C) and N. The contact capacity of the relay is greater than 15A, so the CT secondary side can be reliably shorted in the event of a fault. The relay contact has the function of holding a Chinese position, and pressing the "reset" button can effectively release labor protection. If the fault state is lifted, the device is automatically reset after a failure. The device provides a pair of normally open contacts and a pair of normally closed contacts, which can be connected to various audible and visual alarms or provide comprehensive protection

After the temperature and humidity controller is turned on, press the set key to display 1-xx in the first line, indicating the lower temperature limit, press the up button (increase) and the down key (decrease) to select the lower limit data, then press the OK key to display 2-xx in the first line, indicating the upper temperature limit, press the up button (increase) and the down key (decrease) to select the upper temperature limit data, press the OK key after selection, display 3-xx in the first line, indicate the lower limit of humidity, press the OK key after selecting according to the above method, display 4-xx in the first line to indicate the upper limit of humidity, Press the above method to select the end of the key to complete all settings, and return to the temperature and humidity data display status

If the temperature and humidity controller needs to observe a certain data for a long time, you can press the standby button (lock key), and the controller will always display the current two data. After observation, you can press the standby button to unlock, and the controller will display the temperature and humidity data of each channel in turn.