Digital Temperature Controller

PRIMA 2SP 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 setpoints, which are easily programmed via 10-turn potentiometers or membrane keyswitches on the front of the unit. PRIMA 2SP’s two programmable relays trigger heating, cooling, or high and low alarms for its 2 setpoints. This is a highly accurate controller, with an error as low as 0.1% for linear inputs and no more than 1% for thermocouples. PRIMA 2SP 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 2SP provides power for two-wire 4-20 transmitters. The controller’s modular design has zero-wiring making it virtually shockproof.