Controller Operation
9.10 Probe Parameters Menu 9
9-11
To accept the new cut-out set-point press “SET”.
Accept cut-out set-point
The next function is the configuration menu. Press “EXIT” to resume displaying
the bath temperature.
9
.9 Controller Configuration
The controller has a number of configuration and operating options and
calibration parameters which are programmable via the front panel. These are
accessed from the secondary menu after the cut-out set-point function by
pressing “SET.” There are 5 sets of configuration parameters — probe
parameters, operating 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 Menu
The probe parameter menu is indicated by,
PrObE Probe parameters menu
Press “SET” to enter the menu. The probe parameters menu contains the
parameters, DO and DG, which characterize the transfer function of the
linearized thermistor control probe. These parameters may be adjusted to
improve the accuracy of the bath. This procedure is explained in detail in Section
11.
The probe parameters are accessed by pressing “SET” after the name of the
parameter 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 DO
This probe parameter refers to the temperature at which the control probe out-put
would be 0. Normally this is set for −25.229.
9.10.2 DG
This probe parameter refers to the temperature span of the probe between 0 and
100 % output. Normally this is set for 186.974.
9.11 Operating Parameters
The operating parameters menu is indicated by,
PAr Operating parameters menu