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Physical Location
You can locate your TDC4 on a normal workbench surface. You will need access to the rear of the
instrument because all cable connections are made from the rear. The TDC4 is not restricted to operation
in a flat position. You can operate it on its side, or even upside down.
Differences Between an Omega CSi8D and a TDC4
There are only two hardware differences between an unmodified Omega CSi8D temperature controller
and a Gamry TDC4.
1) A new connector has been added to the rear panel. It is a 3-pin connector used for a 3-wire
100 Ohm platinum RTD. This connector is placed in a panel opening that is normally used for
an optional Ethernet connection.
2) A jumper has been installed between pins 4 and 5 of the rear panel input terminal strip. This
jumper configures the RTD input for 3-wire operation.
The RTD connector is wired in parallel with the input terminal strip on the Omega CSi8D. You can still
make use of the full range of input connections.
If you make other input connections:
•
Be careful to avoid connecting two input devices, one to the 3-pin Gamry connector and one to
the terminal strip. Unplug the RTD from its connector if you connect any sensor to the input
terminal strip.
•
You must reconfigure the controller for the alternate input. Consult the Omega manual for
additional details.
The firmware configuration settings for the PID (proportional, integrating and derivative) controller in the
TDC4 are changed from the Omega defaults. See Appendix B for details. Basically, Gamry’s controller
setup includes:
•
configuration for operation with a 3-wire 100 Ohm Platinum RTD as the temperature sensor,
•
PID tuning values appropriate for a Gamry Instruments Flexcell with a 300 W heating jacket and
active cooling through the Flexcell’s heating coil.
AC Line Connection
The TDC4 is designed to operate at AC line voltages between 90 and 240 VAC, 50/60 Hz. You must use a
suitable AC power cord to connect the TDC4 to your AC power source.
Your TDC4 was shipped with a USA type AC power input cord. If you need a different power cord, you
may obtain one locally or contact Omega Engineering Inc (
http://www.omega.com
).
The power cord using with the TDC4 must terminate with a CEE 22 Standard V female connector on the
instrument end of the cable and must be rated for 10 amp service.
Summary of Contents for TDC4
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