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Digital Temperature Controller

PRIMA 1SP

PRIMA 1SP is a Digital Temperature Indicator and Controller. Its single input accepts J-type (Iron/Constantan) and K-type (Chromel/Alumel) thermocouples, Pt100 RTD and linear (millivolt or milliamp) input. A large LED display on the front of the unit indicates either the process value or the user-defined setpoint, which is easily adjusted via coarse and fine potentiometers or membrane keyswitches on the front of the unit. PRIMA 1SP’s single relay triggers heating, cooling, or high and low alarms for its single setpoint. This is a highly accurate controller, with an error as low as 0.1% for linear inputs and no more than 1% for thermocouples. It also retransmits a 4-20 mA output signal to other devices such as a Programmable Logic Controller (PLC) or Solid-State Relay (SSR). PRIMA 1SP is conventionally an ON-OFF controller that outputs a discrete signal, but can also be used in Time-Proportioning Mode which turns the actuator on and off for periods proportional to the desired control effort, to emulate a continuous actuator that can generate a control effort between 0 and 100%. By including input terminals in the excitation loop, PRIMA 1SP provides power for two-wire 4-20 transmitters. The controller’s modular design has zero-wiring making it virtually shockproof.

  • J, K thermocouples, Pt100 RTD, mV, 4-20 mA inputs
  • Membrane or Potentiometer adjustment for 1 setpoint
  • Accuracy
  • ON-OFF and Time Proportional Control
  • 4-20 mA retransmission output
  • Transmitter excitation supply
  • Modular, zero wiring high reliability design
  • Hysteresis or reset control on front panel

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