Mrk engineers offers microprocessor-based pid controllers, which use latest two fuzzy pill control process. Features include auto tuning, two outputs, remote set point input, transmitter output and universal signal input, ie, thermocouples, rtd, m v or ma inputs. Sensor break protection is also provided. Output can be selected from relay, ssr or 4-20 ma. Non-volatile memory in the instrument stores all the programmed parameters. The instruments have self-diagnostic features and offer three-point alarm. It can also have retransmission output and can also provide time temperature profile control. Two patterns of eight segments each can be programmed in the instruments. The ramp and soak are provided with standard model controller without any additional changes. These pid controllers can operate on wide power supply, ie, 85 to 265 v ac. These instruments are suitable for automation industries, plastic machines, furnaces, temperature baths, process control, heat treatment unit, oven, and most process industries where accurate temperature control is most important.
