Tempco TEC-2500, Instruction Manual

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47
3–16 PV1 Shift
In certain applications it is desirable to shift the controller display value from its actual value. This can easily be
accomplished by using the PV1 shift function.
Enter the configuration menu and press the "scroll" key to bring up the parameter SHIF. The value you adjust
here, either positive or negative, will be added to the actual value. The SHIF function will alter PV1 only.
Here is an example. A process is equipped with a heater, a sensor, and a subject to be warmed up. Due to the
design and position of the components in the system, the sensor could not be placed any closer to the part.
Thermal gradient (different temperature) is common and necessary to an extent in any thermal system for heat
to be transferred from one point to another. If the difference between the sensor and the subject is 35°C, and
the desired temperature at the subject to be heated is 200°C, the controlling value or the temperature at the
sensor should be 235°C. You should input -35°C so as to subtract 35°C from the actual process display. This
in turn will cause the controller to energize the load and bring the process display up to the set point value.