Typical application of digital temperature and humidity sensor
In today’s increasingly high degree of information technology, the computer room that plays the important role of information processing and exchange is the whole information network project
Data transmission center, data processing center and data exchange center. In order to ensure the normal operation of the equipment room and the staff have a
It is essential to monitor the temperature and humidity in the equipment room in a good working environment. A proper and normal temperature and humidity environment ensures that the equipment in the equipment room is normal
An important guarantee for constant operation.
The requirements of the computer room site are mainly based on the national standard “GB2887-89 computing site Technical Conditions”,
Gb9361-88 Safety requirements for computing sites and GB50174-93 Design Specifications for electronic computer rooms. With calculation
With the continuous development of computer technology and the widespread use of computer systems, the environment of the computer room must meet the temperature and humidity of the computer equipment
Technical requirements.
As the necessary conditions for the normal operation of computer equipment, the temperature and humidity of the computer room must be installed in a reasonable location
The temperature and humidity sensor is installed to realize 24-hour real-time monitoring of temperature and humidity, and can be realized on the monitoring host in the central control room
Displays temperature and humidity measurements at each location. Once the value exceeds the preset temperature and humidity upper and lower limits, the monitoring host can
Alarm by changing the value color of the corresponding position. In order to monitor the temperature and humidity of the entire machine room in general, it can be used in the fresh air
The air inlet of the machine and the return air outlet of the main air conditioner are respectively installed with temperature and humidity transmitters to detect temperature and humidity.
Temperature and humidity monitoring in addition to the computer room monitoring, can also be widely used in such as biopharmaceutical, aseptic room, clean workshop, electricity
Information banks, libraries, archives, cultural relics, intelligent buildings and other industries need temperature and humidity monitoring places and fields.
2. Application program characteristics
☆ High performance temperature and humidity transmitter, high accuracy and stability.
☆ Digital signal transmission, easy wiring, long signal transmission distance.
☆ Open communication protocol, easy system expansion.
☆ Configuration software interface, system stability is guaranteed.
☆ The software features rich, practical, easy to maintain and function upgrade.
Third, system hardware configuration
1, host computer hardware requirements:
① Microsoft Windows 2000 (Chinese version) or Windows XP (Chinese version).
(2) IBM PC and its compatible machines, Pentium 500MH CPU, 64 M memory.
③ More than 10G hard disk, more than 200M free hard disk space.
④ SVGA video card PCI or AGP video card, more than 16M video memory
2. On-site hardware configuration:
① RS485/232 Conversion module
② JCJ100N digital temperature and humidity transmitter
③ AC/ DC power converter 220VAC/12VDC 2A or on-site 12DC/2A DC power supply
Fourth, system structure
① The system uses the COM1 serial port to connect to the RS485/232 converter to realize data collection.
② System communication mode: RS485/232, two-wire Data+,Data-, baud rate: 9600BPS
③ Working voltage: 220VAC±10%, or 12VDC± 102A
5. System configuration
1, JCJ100N digital temperature and humidity transmitter
The JCJ100N digital Temperature and Humidity sensor sampling card has A ten-point two-channel sequential approximation A/D converter, standard RS-232 or
485 Communication port. This product uses the recursive average digital software filtering and hardware circuit filtering combined filtering method, so that the outside world
The sampling interference is minimized as much as possible, and the full range accuracy is high, the stability is strong, the consistency is good, and the response speed is fast. JCJ100N
Through the standard 485 serial interface, the multi-point temperature and humidity measurement system can be formed with the computer (up to 256 digital temperature and humidity sensors can be connected).
Description of main parameters:
☆ Working voltage: 12V ~ 24VDC
☆ Temperature range: 0 ~ 50℃ -20 ~ 60℃ -40 ~ 80℃, other indicated.
☆ Accuracy: better than ±0.5℃(0 ~ 50℃)
☆ Humidity range: 0 ~ 100%RH
☆ Accuracy: ±3%RH (20% ~ 90%RH, 23℃); ±2%RH (20%-90%RH, 23℃)
☆ Signal output: standard RS485 interface
☆ Address setting: built-in dip switch, can set 32 address bits (hexadecimal 00 ~ 1F)
2. Data software description
Out of the box: software installation is easy, directly click “Setup.exe” to complete the installation, no other Settings are required
Use, really out of the box.
Various interfaces: with real-time digital display, real-time curve, historical curve, data report, configuration report and other data display side
Style.
Flexible configuration: the picture, text and curve according to the measurement needs, flexible configuration, the picture is specific and vivid.
Data storage: automatic data storage, data export (save) Excel.
Data printing: Support report printing, history curve printing and printing in Excel.
Data query: By entering the query time, you can query the data records and curve records in the corresponding time of the required measured point.
Monitoring alarm: When the monitoring value reaches the alarm condition, the alarm is issued by changing the corresponding data color.
Stable and accurate: the software runs stably, the anti-interference ability is strong, the data acquisition accuracy is high, and the high standard of data monitoring is met
Please.