Section 3: Functions and features
Series 2600B System SourceMeter® Instrument Reference Manual
3-68
2600BS-901-01 Rev. C / August 2016
Front panel
To enable high-capacitance mode from the front panel:
1. Press the
CONFIG
key.
2. Press the
SRC
key and then select
HIGHC-MODE
.
3. Select
SRC-ENABLE
and then press the navigation wheel (or the
ENTER
key).
4. Select
ENABLE
and then press the navigation wheel (or the
ENTER
key).
5. Press the
EXIT (LOCAL)
key to back out of the menu structure.
Command interface
Turning on High-C mode has the following effects on the SMU* settings:
•
smu
X
.measure.autorangei
is set to
smu
X
.AUTORANGE_FOLLOW_LIMIT
and cannot be
changed.
•
Current ranges below 1
µ
A are not accessible.
•
If
smu
X
.source.limiti
is less than 1
µ
A, it is raised to 1
µ
A.
•
If
smu
X
.source.rangei
is less than 1
µ
A, it is raised to 1
µ
A.
•
If
smu
X
.source.lowrangei
is less than 1
µ
A, it is raised to 1
µ
A.
•
If
smu
X
.measure.lowrangei
is less than 1
µ
A, it is raised to 1
µ
A.
*
smu
X
: For Models 2601B, 2611B, and 2635B, this value is
smua
(SMU Channel A); for Models
2602B, 2604B, 2612B, 2614B, 2634B, and 2636B, this value can be
smua
(for SMU Channel A)
or
smub
(for SMU Channel B).
Measuring current
The following inputs are required to test leakage using the factory leakage script, as shown in the
script example below.
•
SMU:
Sets the Series 2600B source-measure unit to use
•
levelv:
Sets the output voltage level
•
limiti:
Sets the current limit for discharging or charging the capacitor
•
sourcedelay:
Solve the following equation to determine the amount of time before taking a current
reading:
i C
∆
v
∆
t
------
=
Where:
i
is the
limiti
setting (current limit)
•
measurei:
Sets the current measure range
•
measuredelay:
Defines the delay to wait after lowering the current limit before taking the measurement
Script example
Use the
smu
X
.source.highc
attribute to set and control the options for high capacitance mode.
The programming examples (and figure) below illustrate how to enable high-capacitance mode on
SMU A.
1. To enable high-capacitance mode, send:
-- Enables high-capacitance mode.
smua.source.highc = smua.ENABLE
