Keithley 2182, User Manual, Page: 173 / 339

Analog Output 10-5
Operation
Analog output connections
The analog output is accessed from the rear panel BNC connector that is labeled “ANALOG
OUTPUT.” This connector requires a cable that is terminated with a standard male BNC connector.
Output resistance — The output resistance of Analog Output is 1k Ω ±5%. To minimize the
effects of loading, the input resistance of the device connected to Analog Output should be as
high as possible. For example, with a device with an input resistance of 10M
Ω , the error due to
loading will be approximately 0.01%.
Configure and control analog output
1. Press SHIFT and then AOUT to display the Gain (M) factor:
M +1.0000000^ (factory default)
2. Gain can be set from -100e6 to 100e6. The and keys control cursor position and
the and range keys increment and decrement the digit value. To change range,
place the cursor on the multiplier and use the and keys (m = × 0.001, ^ = × 1,
K = × 1000, and M = × 1,000,000). With the cursor on the polarity sign, the and
keys toggle polarity.
3. Press ENTER to enter the Gain value and display the Offset value:
B: +00.000000 (factory default)
4. Key in the Offset value.
5. Press ENTER to enter the Offset value and enable Analog Output. The instrument
returns to the normal display state.
6. To disable Analog Output, press SHIFT and then AOUT.
Analog output rel
With analog output enabled, Analog Output Rel is used to automatically reference the analog
output voltage to zero. When Analog Output Rel is turned ON, the present analog output voltage
is used as the Rel value. This sets the analog output voltage to zero. Subsequent analog output
readings will be the difference between the actual analog output and the Rel value.
To enable Analog Output Rel, press SHIFT and then OUTPUT. The message “AOUT REL
ON” will be displayed briefly to indicate that it is enabled. To disable Analog Output REL, press
SHIFT and then OUTPUT a second time. The message “AOUT REL OFF” will be displayed
briefly.
NOTE A new Rel value for analog output can be established at any time by first disabling
Analog Output Rel and then re-enabling it.