Keithley 2601B Reference Manual page 204

Series 2600B System SourceMeter® Instrument Reference Manual
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
4. Select ENABLE and then press the navigation wheel
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:
•
smuX.measure.autorangei is set to smuX.AUTORANGE_FOLLOW_LIMIT and cannot be
changed.
•
Current ranges below 1 µA are not accessible.
•
If smuX.source.limiti is less than 1 µA, it is raised to 1 µA.
•
If smuX.source.rangei is less than 1 µA, it is raised to 1 µA.
•
If smuX.source.lowrangei is less than 1 µA, it is raised to 1 µA.
•
If smuX.measure.lowrangei is less than 1 µA, it is raised to 1 µA.
* smuX: 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:
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 smuX.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
2600BS-901-01 Rev. B / May 2013
∆v
i C
----- -
=
∆t
Section 3: Functions and features
(or the ENTER key).
(or the ENTER key).
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