RTD PT100 Transmitter

Advertise in delabs

This is a RTD Pt-100 Transmitter, It can Convert Thermocouple mV or RTD mV to 4-20 mA Current Transmitter. The part numbers on Circuit and silk screen may not match. But the PCB may be usable. The output is a current source and not a current sink. It goes to a 4-20mA Mux with a common ground. The Circuit RTD-Pt-100-Transmitter Circuit.

RTD Transmitter 4-20 mA

This low-cost transmitter was made to send RTD information in a 4-20mA over long distance. The 4-20mA was the input to a Analog-Mux which interfaced to a GE-Fanuc PLC system and a 486 Computer. The Analog Multiplexer Built around CD4051 was was controlled by PLC to get data from numerous channels. This reduced the cost of the System. This is ok when Real-Time Acquisition is not required. The Analog 4-20 to 4-20 Mux-Buffer circuit can be seen at Industrial Process Control Circuits.

This was done as customer budget could not afford dedicated analog input modules for every channel. There were more than 50 Inputs. The thermal inertia of system did not need a real time or fast correction.

The PNGs of PCB is 600dpi 16 color. It is to be scaled appropriately.

  • Stellaris SBC Intelligent Display Kit – TI
    On a Stellaris LM3S9B92 this RDK is a complete, open-tool graphical touch-screen user interface design solution for control, automation, and instrumentation applications. Stellaris SBC Intelligent [...]
  • Closed Loop Control System and Runaway Process
    A Closed Loop Control System is the most important aspect of Maintenance, Regulation and Stability in any Live Process. Nature itself is self regulated in [...]
  • Thermocouple and Pt-100 RTDThermocouple and Pt-100 RTD
    The easiest way to measure temperature is with a glass diode like 1N4148 or a metal Transistor like 2N2222. These have a small temperature range, [...]
  • Types of Capacitors
    Capacitors are as simple as two plates of metal separated by a insulator called dielectric. When you make large values of capacitors, just two films [...]
  • Self Tuning or Trainable Fuzzy Controllers
    A closed loop controller is the heart of an Industrial Automation System. Right from an On-Off Hysteresis Controller to a Auto Tune PID Controller, we [...]
  • Multi-Instrument Digital Assistant – PIC16F84A
    Multi-Instrument Digital Assistant – PIC16F84A “It contains four instruments in one unit: logic probe, single channel logic state analyzer, frequency counter and serial code receiver.” [...]
  • Dictabird and the FlintstonesDictabird and the Flintstones
    First time in the history of AI in the year 1994 they recreated Stone age History in the form of the Flintstones Movie. This is [...]
  • MPC8569E for Broadband Access Equipment – Freescale
    MPC8569E for Broadband Access Equipment – Freescale “The MPC8569E PowerQUICC III family is designed to address the increasing performance requirements for broadband access equipment including [...]
About delabs 419 Articles
delabs is a web-service for product design and development.

Be the first to comment

Leave a Reply