有可编程变送器 可编程变送器那里的好

　　　　　　　　　哪里有可编程变送器？可编程变送器那里的好？


深圳供应商代理销售德国原装进口Roessel可编程制变送器，型号：Model RT-H

Programmable Transmitter Type RT-H 
HART-Communication Two-wire transmitter for mounting in sensor-heads, field-housings or control panels. 

Transmitters convert the low-level ** from thermocouple or resistance thermometer into a high-level standard **. The non-linear input from temerature sensors is converted into a temperature or EMF - linear output **, depending on programming, of 4 ... 20mA. The transmitter uses the HART - protocol and frequency shift keying on the 4 - 20 mA current output loop. 

This system ensures either a multi - drop communication with up to 15 units or full operation as a - wire transmitter in a 4 - 20 mA current loop. The microcomputer-controlled system reduce type and range variety, usual with analog transmitters, to only one model. Significant lowered inventory costs, universal use, short change - over and shut - down times are the advantages. 

For maximum operational safety and reliability in harsh ambient conditions like vibrations no mechanical components (potentiometers) are involved whereever possible. Extensive calculations like drift/offset compensation, linearisation limit comparision are done ''on site'' which means immediately close to the sensor. For the transmitter configuration a HART - interface as well as f.e. the measuring value, limits, cool joint temperature and so on without affecting the analog output of 4 to 20 mA