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The
PC permits the monitoring of actual temperature, set temperature,
percent of power applied to the load, and alarm status. It allows
selection of the set temperature, turning the power on or off,
canceling an alarm condition by silencing the PC audio alarm, tuning
the controller setting parameters and displaying the current sensor selection.
Controller
tuning parameters consist of proportional bandwidth (P), integral
gain in repeats per minute (I), and the derivative rate (D) for
selecting P, PI, PD, or PID operation. An on/off operating mode with
an adjustable hysteresis may also be selected. A controller
configuration command allows for additional optional settings.
The
configuration mode allows the operator to select the applicable type
thermocouple or +/-100 millivolt input, type of optional auxiliary
input, set control limits for the application, give the controller an
identifying name, select either heating or cooling mode, plus select
and enable a protective password.
The
three thermocouple selections have an operating temperature range of
0 degrees C. to +750 C. for type J, -200 C. to +1250 C. for type K
and 0 C. to +1450 C. for type S.
Alarm
selections consist of no alarm function, a fixed high and/or low
temperature alarm or tracking alarms. These alarms can be selected
for either latching or non-latching operation. Reset of the alarms is
accomplished via the PC communications interface or an optional local switch. |