TE Technology TC-24-25 - Manual (Page 7)

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NOTE: Generally, there is approximately a 0.5 to 1.3 V drop from the power supply to the
thermoelectric modules. You may wish to adjust the power supply accordingly to ensure full power
is delivered to the cooler when needed, subject to the 28 V limit.
*NOTE: For operation below 15 V, move the jumper on JP4 so that it connects both pins together.
The will allow proper operation down to 12 V. (See “Controller Wiring Diagram” for JP4 location.)
1.4 Turn power on to both the computer and power supply (which in turn powers up the controller).
The on-board green LED will flash at a steady rate to indicate that the controller is energized
correctly.
1.5 Insert the TC-24-25 software disk into the computer floppy-disk drive. To run the software from the
floppy disk, select START, RUN from your Windows Desktop and then enter A:\TC-24-25.exe.
This will load the software into your computer’s RAM. Alternatively, copy the TC-24-25.exe file to
your hard-disk drive and run the program from there.
1.6 The Main Menu screen will appear on your computer monitor. All selections are made from this
screen. In the PC COMMUNICATIONS section, select the RS-232 port (1 through 4) to which the
controller is connected by using the COMM PORT menu key. Assign a two-digit address code of
"00" to the controller for the initial set-up in the ADDRESS OF CONTROLLER TO ACCESS box.
The "00" code is the universal address which will communicate with all the controllers in a multiple
controller system. Refer to Appendix C “Communications Port Address Assignments” for
additional address code information and on how to install multiple controllers on a serial link. After
making these selections, click on the INITIALIZE button.
1.7 NOTE: If you receive an error message, please refer to Appendix D “RS-485 Troubleshooting
Guide.”
2.0 Configure
2.1 In the CONFIGURE section, the various selections are used to establish the custom operating
criteria for the controller. NOTE: To avoid damage to the thermoelectric cooler, confirm that OFF
is selected in the OUTPUT ON/OFF menu key, and then click the Send Box Values button prior to
proceeding!
2.2 First, select the PWM OUTPUT TIMEBASE menu key. Options for SLOW TIMEBASE 675Hz or
FAST TIMEBASE 2700Hz will appear. Select the option that is appropriate for you. Generally,
675 Hz will work fine, and it is the recommended default.
2.3 Next, click on the SET TEMP TYPE INPUT 2 menu key to reveal the options available.
COMPUTER SET VALUE is to be selected when using the software to set the desired control
temperature. The other selections, POTENTIOMETER SET, 0 TO 5vdc SET, and 0 TO 20ma SET,
are for external set temperature adjustments. Refer to the “Controller Wiring Diagram” and the
“TC-24-25 Block Diagram” for additional information. The controller default setting for these
options is the full range of the thermistor input sensor. The DIFF.SET=INP2+FIXED SET
establishes an actual set temperature that is the sum of the temperature sensed by the optional,