The next function is the configuration menu. Press “EXIT” to resume display-
ing the bath temperature.
9.9
Controller Configuration
The controller has a number of configuration and operating options and calibra-
tion parameters which are programmable via the front panel. These are ac-
cessed from the secondary menu after the cutout set-point function by pressing
“SET.” There are 5 sets of configuration parameters — probe parameters, oper-
ating parameters, serial interface parameters, IEEE-488 interface parameters,
and controller calibration parameters. The menus are selected using the “UP”
and “DOWN” keys and then pressing “SET”.
9.10
Probe Parameters
The probe parameter menu is indicated by,
PrObE
Probe parameters menu
Press “SET” to enter the menu. The probe parameters menu contains the pa-
rameters, R0 and ALPHA, which characterize the resistance-temperature rela-
tionship of the platinum control probe. These parameters may be adjusted to
improve the accuracy of the bath. This procedure is explained in detail in
Sec-
tion 11
.
The probe parameters are accessed by pressing “SET” after the name of the pa-
rameter is displayed. The value of the parameter may be changed using the
“UP” and “DOWN” buttons. After the desired value is reached press “SET” to
set the parameter to the new value. Pressing “EXIT” will cause the parameter to
be skipped ignoring any changes that may have been made.
9.10.1
R
0
This probe parameter refers to the resistance of the control probe at 0°C. Nor-
mally this is set for 100.000 ohms.
9.10.2
ALPHA
This probe parameter refers to the average sensitivity of the probe between 0
and 100°C. Normally this is set for 0.00385°C
-1
.
9.11
Operating Parameters
The operating parameters menu is indicated by,
PAr
Operating parameters menu
6020 Series Calibration Bath
User’s Guide
48
