Lake Shore Cryotronics 121, User Manual

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3.4 Display Brightness
The front panel 6-digit LED display brightness can be adjusted for opti-
mal viewing. The default value, 8, is recommended for most applications.
A setting of zero turns the display off, which may reduce noise in sensi-
tive measurements. This can only be configured through the computer
interface. Refer to Chapter 4.
Menu Navigation
Brightness: 0 to 15
Default: 8
Interface Command:
BRIGT
3.5 Output Current Setup
This section explains how to configure the output current through the
keypad. Refer to Chapter 4 for information on the computer interface
commands. The Model 121 has been optimized to drive resistive sensors
(such as Cernox and Platinum Sensors), diode sensors, and Hall genera-
tors.
3.5.1 Enable/Disable
The Model 121 allows the user to turn on or turn off the output current
by pressing . When this key is pressed, the display will either read
“off” for the disabled state, or the display will show a numeric value for
the enabled state. The output current will always power on in the dis-
abled state. In this state the instrument will not output any current.
Menu Navigation
Output: Enabled or Disabled
Default: Disabled
Interface command:
IENBL
3.5.2 Range Change
The Model 121 allows for the user to change ranges via the

and

keys. The range can be changed to any of the 13 fixed ranges or the
user current range using these keys. The user current range can be
accessed by pressing

when in the 100 mA range. The range does not
wrap around. For example, when in the USER current range, pressing

will do nothing.