Lake Shore Model 321 Autotuning Temperature Controller User’s Manual
Operation
3-21
Press the
Enter
button. This completes the definition of the analog output. The 0 to 10 volt output will
now correspond to 2 K to 300 K.
3.4.3 Factory Default Settings
The controller can be reset to factory default settings by pressing and holding the
Escape
button for
≈
5 seconds. An alternate method is to turn off the unit, and press and hold the
Escape
button while
turning the controller on. In either case, the user will see the following display.
CAUTION:
Any User or SoftCal Curves and Zone Settings are erased when the
controller is initialized.
Use either the
s
or
t
button to cycle the selector arrow (
→
) between choices. Select No followed by
the
Enter
button if you do not wish to reinitialize the memory. Select Yes followed by the
Enter
button
if you do wish to initialize the memory. After briefly flashing a “RAM Initialized” message, the
controller will then be returned to factory settings as follows.
Heater ..................Off
Setpoint................0.0
Units.....................K
Input Type............Determined by Model Number
Filter.....................Off
TempComp..........Off
Ramp Rate...........Off
Curve ...................Determined by Model Number; User and SoftCal Curves erased
SoftCal .................V selected but not implemented
Zone Settings.......Erased
Baud ....................300
Analog Out...........Default (0 V = 0 K, 10 V = 1000 K)
AutoTune .............Auto PID selected
P ..........................50
I............................20
D ..........................100