Keithley 2651A Reference Manual page 82

Section 2: General operation
When the V-Source is the selected source:
•
The programmed V-Source value remains on the display.
•
Internally, the V-Source is set to 0 V.
•
The current compliance setting remains the same as the output-on value. Real compliance
detection remains active.
•
Measurements are performed and displayed.
When the I-Source is the selected source:
•
The programmed I-Source value remains on the display.
•
Internally, the V-Source is selected and set to 0 V.
•
Current compliance is set to the programmed Source I value or to 10 percent full-scale of the
present current range, whichever is greater.
•
Measurements are performed and displayed.
The Model 2651A can be used as an I-Meter when it is in ZERO output-off mode because it will
output 0 V, but measure current.
Selecting the output-off mode
Setting the output-off mode from the front panel
To configure the output-off mode from the front panel:
1. Press the CONFIG key.
2. Press the OUTPUT ON/OFF control. The CONFIGURE OUTPUT A menu displays.
3. In the CONFIGURE OUTPUT A menu, select OFF-STATE to display the OUTPUT OFF-STATE
A menu.
4. With the OUTPUT OFF STATE A menu displayed, select MODE to open the OFF MODE A
menu.
5. Select the desired output-off mode: HI-Z (high-impedance), NORMAL, or ZERO.
Remote configuration of the output-off mode
To select the normal output-off mode:
smua.source.offmode = smua.OUTPUT_NORMAL
To select the high-impedance output-off mode:
smua.source.offmode = smua.OUTPUT_HIGH_Z
To select the zero output-off mode:
smua.source.offmode = smua.OUTPUT_ZERO
2-60
Model 2651A High Power System SourceMeter® Instrument Reference Manual
2651A-901-01 Rev. A / March 2011