TE Technology TC-24-25 - Manual (Page 10)

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If the controller is configured as described in the “NOTE” in section 2.6, then -100% power will
correspond to full-power cooling.
3.3 PROPORTIONAL BANDWIDTH is the temperature band in which 0% to 100% power will be
applied to the cooler. The acceptable bandwidth values that may be entered are 1° to 100°. See
Appendix E “PID Tuning” for additional information on settings.
3.4 INTEGRAL GAIN is used to slowly change the output power until the difference between the
actual temperature and set temperature is zero. This value is expressed in repeats per minute, and
the acceptable values that may be entered are 0.01 to 10 repeats per minute.
3.5 DERIVATIVE GAIN senses the rate of rise or fall of the system temperature and adjusts the cycle
time of the controller to minimize overshoot or undershoot. This value is expressed in cycle rates
per minute, and the acceptable values that may be entered are 0.01 to 10 cycles per minute.
3.6 CONTROL DEADBAND is the temperature band where the controller is turned on and off by
either rising or falling temperatures where no heating or cooling takes place. This band is expressed
in degrees, and the acceptable values that may be entered are 0.1 to 100.
3.7 Review the tuning parameters for correctness and then click the Send Box Values button to
download these constants to the controller.
4.0 Calibration
4.1 The CALIBRATE section provides additional variables that can be used to fine-tune your system’s
operation. You may want to try controlling with the initial settings prior to entering values in this
section.
4.2 INPUT 1 OFFSET is a manual method of compensating for the sensor 1 temperature and actual
control temperature.
4.3 INPUT 2 OFFSET is a manual method for compensating for the sensor 2 temperature and actual
temperature.
4.4 HEAT SIDE MULTIPLIER is a 0.01 to 2.00 numerical multiplier that compensates for the non-
symmetrical response of the thermoelectric cooler between the heat and cool modes.
4.5 If you have entered values in the CALIBRATE box and they are desired settings, click the Send
Box Values button to download these constants to the controller.
5.0 Controller Operation
5.1 Initial set-up of the TC-24-25 controller is complete.
5.2 Select ON in the OUTPUT ON/OFF menu key located in the CONFIGURE section. Then click the
Send Box Values in the CONFIGURE section to turn the controller on.