Section 2: General operation
2606B System SourceMeter® Instrument Reference Manual
2-66
2606B-901-01 Rev. B / May 2018
Normal output-off mode
The normal output-off mode is the default output-off mode setting. When the source-measure unit
(SMU) is in the normal output-off mode, you can select either the current or the voltage output-off
function (see
(on page 2-67)). You can also specify current and voltage output-off
limits (
Output-off limits (compliance)
(on page 2-68)).
When the output is turned off, the output goes to either 0 V or 0 A, depending on the selected
output-off function. Voltage is the default output-off function.
High-impedance output-off mode
For the high-impedance output-off mode (HI-Z), the output relay opens when the output is turned off.
This disconnects external circuitry from the input/output of the source-measure unit (SMU). To
prevent excessive wear on the output relay, do not use this output-off state for tests that turn the
output off and on frequently.
Zero output-off mode
The 2606B is configured as described below when it is in the zero output-off mode.
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. 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 2606B can be used as a current meter when it is in zero output-off mode because it outputs 0 V,
but measures current.
To configure the output-off mode from the virtual front panel:
1. Press the
CONFIG
key.
2. Press the
OUTPUT ON/OFF
control.
3. Select
OFF-STATE
.
4. Select
MODE
.
5. Select the output-off mode:
HI-Z
(high-impedance),
NORMAL
, or
ZERO
.
6. Press the
EXIT
key to return to the normal display.