Sterling SDAA 25-100 specifications Process Air Temperature Controller

Process Air Temperature Controller

Our dryers use a microprocessor-based PID temperature controller for maintaining process air temperature. The controller is a modular, self-contained unit you can remove from the mounting housing. All parameters except for the process air set point are factory set and adjusted; normally, no field adjustment to the internal controls is necessary.

Figure 5: Typical Process Air Temperature Controller

PV

SV

Identifying Process Air Temperature Controller LED Indicators

Indicator	Name	Description
PV	Process Value	During normal operation, the process value (PV)
	Numeric LED	numeric LED indicator displays the process
8.8.8.8
		temperature at the To Process thermocouple. It
		also lists parameters during setup and error
		messages if any errors occur.
SV	Set Value	During normal operation, the set value (SV)
	Numeric LED	numeric LED indicator displays the process set
8.8.8.8
		point temperature selected for the dryer. The dryer
		then maintains this set point temperature. This
		LED indicator also displays parameter and pre-set
		function values during configuration setup.
OUT1	Out 1 LED	Lit when Control Output 1 is on. The Out1
		indicator lights when the controller signals the
		process heaters to be energized.
OUT2	Out 2 LED	Lit when Control Output 2 is on. Not used in
		this application.
AT	AT LED	Flashes during auto-tuning in process value (PV)
		screen.

Dehumidifying Dryers Chapter 4: Operation 26 of 59