Guangzhou Hui Ding Electronic Technology Co., Ltd.   

        temperature and humidity meter to measure and control the temperature and humidity of the estate will use instruments of Guangzhou Hui Ding Electronic Technology Co., Ltd. products: HD series of temperature and humidity meter temperature and humidity meter technical specifications: a first input specifications: thermocouple:   K, S, Wr, E, J, T, B, N  etc.. Heat resistance:   Pt100, Cu50 etc.. Electric     resistance:   0~80 Omega, Omega 0~400 etc.. Electric     pressure: 0~20mV ......   0~1V, the input impedance is greater than or equal to 5M, 0~5V is more than or equal to the input impedance of 100K omega. Electric     flow: 4~20mA, 0~20mA, input resistance less than 250 ohm, 0~10mA, input resistance less than 500 ohm. Second input specifications:   electric pressure: 0~20mV   ......   0~1V, the input impedance is more than 5M Omega, 0~5V, input impedance is more than 100K omega. Electric     flow: 4~20mA, 0~20mA, input resistance less than 250 ohm, 0~10mA, input resistance less than 500 ohm. Measuring range: 1999~+9999.                               measuring accuracy: 0.5 (+ 0.5FS) or 0.2 (+ 0.2FS). Note: the instrument of thermocouple B indexing, can be measured in the temperature range of 0~600, but the precision can not reach the 0.2 level, in the     to ensure that the 0.2 level measurement precision 600~1800 temperature range. Because of tungsten rhenium thermocouple accuracy and consistency is low, instrument of WRe3WRe25  the measurement precision is only 0.5 level. Alarm output: relay contact switch output (normally open and normally closed contact capacity +), 220VAC/2A or 24VDC/2A. The alarm accuracy is + - 1 DEG or + 1 defined unit. Transmission range: 0~22mA, 0~10VDC.           transmission accuracy: 0.3 (+ 0.3FS). Communication interface: RS485 serial communication interface, RS232C serial communication interface. Power output: 24VDC (voltage and input isolation instrument), the maximum output current of 25mA, can be used for passive transmitter. Temperature compensation: 0~50 C digital automatic temperature compensation. The use of the environment: the environment temperature of     0~50 C, relative humidity     less than 85, to avoid the corrosive gas. Electric         switch power source:     90~260VAC (50HZ/60HZ), 24VDC + 2V, power consumption is less than or equal to 10W. Heavy         weight: less than 1000g. Note the temperature and humidity instrument use: instrument must be in accordance with the instrument wiring diagram for the correct wiring before use (please pay special attention to the power supply wiring). After power on, must to the instrument input / output parameters are set correctly, can be put into use. The supplier can set the instrument parameters according to user requirements, please specify when ordering user input / output specifications and requirements. Company address: Guangzhou City, Tianhe District     Mu Po Industrial Park   5   3   Building 2 floor;   Tel: 02032031081  customers are welcome to inquire!