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1. PRESENTATION
STATOP series 15 autotune controllers are remarkably simple to use. Three or four
liquid-tight keys on the front panel are used to select the type of sensor, the scale, the
control mode and its parameters, the alarm mode, the resolution, display in ° F or ° C,
operation in Automatic or Manual mode, etc.
A 4-digit display unit indicates the temperature or the setpoint at a glance. The high
resolution of the analogue/digital converter, the linearization of the input signal, cold
junction compensation, and the P-I-D calculations are performed by the same
microprocessor, using fuzzy logic. All values and parameters are stored in a non-volatile
memory, for more than ten years, even if the controller is disconnected.
The autotune feature determines the best parameters (proportional band, time of
derivative and integral action), for precise control with a minimum of overshoot and of
oscillation about the setpoint. For a given process, if an autotune has been performed, it
remains valid even if the controller has been powered down in the meantime. In other
words, a power outage does not cause any loss of parameters.
Series 15 STATOPs let you program a temperature rise ramp, a timer on the output,
and various alarm modes.
Finally, for security, programming by an uninitiated user can be completely disabled by a
software key.
2. PRELIMINARY INSTRUCTIONS
2.1. Installation precautions
Microprocessor-based devices are vulnerable to interference in an industrial
environment: a few simple precautions can help ensure optimum performance.
Temperature. Check that the climatic conditions remain within the range specified in the
instructions (temperature and relative humidity limits). Take care not to exceed 50° C;
install an air-conditioning device if there is a risk of exceeding this temperature.
Vibrations, shocks. The device must be located in a place protected from shocks and
excessive vibrations; more generally, full precautions should be taken to prevent
physical damage.
Dust. In atmospheres that are very dusty or corrosive (acid vapours, for example), the
device must be enclosed in a box or cabinet, or slightly pressurized with clean dry air or
a neutral gas.
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