Thermocouple sensors generating emf/mv and rtd sensors giving the change in resistance value with respect to the change in temperature are having non linear characteristic, hence to indicate the temperature within the accuracy of 0.1oc or 1oc throughout the measurable range, the need arises to linearize these curves. Libratherm offers various models of linearized temperature indicator / controller for accurate indication of temperature within the accuracy of ± 1 c or ± 0.1 c in spite of non-linear behavior of the thermocouple and rtd [pt-100] sensors. The linearized indication is achieved by software linearization technique, where the data`s are stored in the high-density memory. Along with the digital linearized indications, the single or dual set point control is also available. The control action may be on/off [through relay/ssr/triac] or proportional [through [4-20] ma/ [0-5] v etc.] one of the application areas of this controller is to use it as the safety controller [or police protection] along with the sophisticated pid or ramp/soak program controller where the indicating accuracies of both are matched without any ambiguity. Also,for higher temperature measurement up to o 1800 c, using r, s or b type, these instruments o gives guaranteed indicating accuracies of ± 1 c.
Features of the linearized temperature indicator / controller are:
Available in din size.
Highly accurate and sturdy in operation.
Accuracy better than ± 0.1 % of the full scale.
Elegant looks and very easy to operate.
Control output of relay or traic or dc pulse or [4-20] ma/[0-5] v.
Uses high quality potentiometer and membrane switch, push type coded switch for adjusting the set points.
Operates on 230 vac / 110 vac ± 10%, 60 / 50 hz
Application:
Heat treatment 4 furnace / oven control
Star / delta change over of heating coils 4 police protection with pid/program controller
Constant temp. Bath 4 environmental chambers
Research & dev. Centers. 4 cold storage and chilling plants
Laboratory equipment etc.
