Nova-Tech Digi-Sense Termperature Controller RS (Standard Models) - Manual (Page 6)

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FIGURE 3. TEMPERATURE CONTROLLER, BACK PANEL
(230 V MODEL)
APPLICATION DATA
Applications for the Temperature Controller include heating and cooling of
solids, liquids, and gases. For all applications, there are certain set-up opera-
tions that should be made carefully to assure optimum and safe performance.
The power and type of heater, the positioning of the sensor, the amount of
thermal insulation, the flash point of the heated material and the many con-
troller set-up menu options are among the many variables to be considered in
setting up the controller.
One of the most important of these considerations is the heater sizing. A heater
that is too low powered may not be able to raise or even maintain the material at
the desired set point. A heater that is too high powered will not maintain precise
temperature control and may be unsafe. Because of the many system vari-
ables, optimum heater sizing must be determined experimentally; however, an
approximation can be made through a few calculations. These calculations are
included in a software program available from your dealer.
DESCRIPTION
GENERAL
The Temperature Controller is designed to maintain a constant, pre-set pro-
cess temperature. It uses a temperature sensor to detect the temperature of
the process. Using a microprocessor software algorithm, it adjusts a heater or
cooler by varying the output duty cycle. The Temperature Controller is a single-
loop controller intended for laboratory or industrial applications. The unit can
control loads of up to 10 amperes (A).
The Temperature Controller is housed in a rectangular metal enclosure, with
plastic bezels on the front and back. All connections are made on the rear of
the unit. The display and keypad are on the front. A bail bar, or tilt stand, is
used to elevate the front display panel for easy viewing and operation. The
unit can also be mounted in a panel with the use of an optional panel mount