SRS Labs CTC100, User Manual

Page: 31 / 177

Operation 19
CTC100 Programmable Temperature Controller
C ontrol a temperature
The CTC100 can control the temperature of one or more external devices with a resistive heater
and a temperature sensor.
Each of the CTC100 channels can use proportional-integral-differential (PID) feedback
software to monitor a temperature sensor and determine how much power to send to the heater.
The PID feedback has three adjustable gain factors that determine how much and how quickly the
heater power is adjusted if the temperature deviates from its desired value. These gain factors must
be properly set before the CTC100 can control the temperature of your system.
Start by plugging the heater and temperature sensor into the CTC100
must be in thermal contact with the heater the better the thermal contact is, the more precise
the temperature control will be.
Enable the low pass filter
The stability of the feedback loop can usually be dramatically improved by lowpass-filtering the
temperature reading. To do this, first select the channel to be filtered by pressing Select
ouching the relevant channel to highlight it. Although
could also select the output channel at this point, since you will need to set it up next. If any other
channels are highlighted, touch them to de-select them.
ve selected
temperature sen and
Now p Setup ey. At the top of the screen are three blue tabs: a for
configuring system-wide parameters like the RS-232 baud rate and the display brightness, and a tab
for each of the channels you selected. Touch the tab