Section 2: General operation
2606B System SourceMeter® Instrument Reference Manual
2-38
2606B-901-01 Rev. B / May 2018
To minimize the drift, a reference and zero measurement should be made immediately before the
critical test sequence. The ONCE setting can be used to force a refresh of the reference and zero
measurements used for the current aperture setting.
Autozero settings
Autozero setting
Description
OFF
Turns automatic reference measurements off.
ONCE
After immediately taking one reference and one zero
measurement, turns automatic reference measurements off.
AUTO
Automatically takes new acquisitions when the 2606B determines
reference and zero values are out-of-date.
Front-panel autozero
To change autozero from the virtual front panel:
1. Press the
CONFIG
key.
2. Press the
MEAS
key.
3. Turn the navigation wheel to select
AUTO-ZERO
, and then press the
ENTER
key or the
navigation wheel .
4. Turn the navigation wheel to select the mode (
OFF
,
ONCE
, or
AUTO
), and then press the
ENTER
key or the navigation wheel .
5. Press the
EXIT (LOCAL)
key to return to the previous display.
Remote command autozero
To set autozero from a remote interface:
Use the autozero command with the appropriate option shown in the following table to set autozero
through a remote interface (see
(on page 7-192)). For example, send the
following command to activate channel A automatic reference measurements:
smua.measure.autozero = smua.AUTOZERO_AUTO
Autozero command and options
Command
Description
smu
X
.measure.autozero = smu
X
.AUTOZERO_OFF
Disable autozero. Old NPLC cache values are
used when autozero is disabled (see
(on page 2-39)).
smu
X
.measure.autozero = smu
X
.AUTOZERO_ONCE
After immediately taking one reference and one
zero measurement, turns automatic reference
measurements off.
smu
X
.measure.autozero = smu
X
.AUTOZERO_AUTO
Automatically takes new acquisitions when the
2606B determines reference and zero values are
out-of-date.