Gamry Instruments TDC4, Operator'S Manual, Page: 19 / 32

3 - 4
Figure 3 -1
Initial Dialog Box Displayed by a TDC4 Script
4) When you select Ok, the script will send configuration data to the TDC4. This process should
take less than one minute.
5) At the end of the transfer process, a second dialog box, similar to Figure 3 -2 appears.
Figure 3 -2
Final Dialog Box Displayed by a TDC4 Script
7) Select Ok to end the reset process.
Automatic versus Manual Tuning
You should automatically tune your TDC4 whenever possible.
Unfortunately, the system response with many electrochemical cells is too slow for auto tuning. You
cannot auto tune if a 5
° C increase or decease in the system temperature takes more than ten minutes.
In most cases, auto tune on an electrochemical cell will fail unless the system is actively cooled.
A full description of the manual tuning of PID controllers is beyond the scope of this manual. However, a
later section of this chapter does give a relatively simple step by step procedure for manually tuning the
TDC4.
The following table contains the tuning parameters for a Gamry Instruments Flex Cell used with a 200 W
heating mantle and switched cooling using water flow though the standard cooling coil. The solution
was stirred.