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MEASUREMENT OPERATION
TMPM5200-2
5-261
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Advanced Temperature Control dialog
Sample Holder
Select the holder type attached to the instrument.
Indication
Select which temperature to display, Celsius or Fahrenheit.
COM Port
Specify the communication-port (COM port) number of the PC with which the
temperature controller communicates. Usually, use COM1 for communicating with the
lock-in amplifier, and COM2 for communicating with the temperature controller.
Connect the RS-232C cable, with which the temperature controller connects, to the
specified COM port of the PC. The RS-232C communication settings are as follows:
Communication speed:
9,600 bps
Data
length:
7
bit
Parity:
Even
Stop
bit:
1
bit
P Gain / I Gain / D Gain
These set the PID parameters for controlling temperature. Although the exact parameter
values differ depending on the unevenness of the holder, specimen size and specimen
temperature, the default values are as follows:
P
Gain:
27.4
I
Gain:
9
D
Gain:
2
For more details on the PID control, refer to the instruction manual or other
explanatory books.
Temperature Offset
The temperature measurement is performed by measuring the resistance of the
temperature sensor (platinum thin-film resistance pair). The resistance sometimes
increases a little owing to the contact resistance of screws attached to the holder, cable
