Keithley 2657A User Manual

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-192 2657A-901-01 Rev. B/December 2012
Details
This setting controls the aperture of measurements made for contact check. It does not affect the
smuX.measure.nplc aperture setting.
The speed setting can have a dramatic effect on the accuracy of the measurement (see specifications).
Example
smua.contact.speed = smua.CONTACT_SLOW
Configure contact check for higher accuracy
on SMU channel A.
Also see
Contact check connections (on page 2-51)
Contact check measurements
(on page 2-37)
reset()
(on page 7-155)
smuX.contact.check()
(on page 7-189)
smuX.contact.r()
(on page 7-190)
smuX.reset()
(on page 7-211)
smuX.contact.threshold
This attribute stores the resistance threshold for the smuX.contact.check() function.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Instrument reset
SMU reset
Recall setup
Not saved
100 (100 Ω)
Usage
rValue = smuX.contact.threshold
smuX.contact.threshold = rValue
rValue
The resistance above which contact check should fail (measured in ohms)
X
Source-measure unit (SMU) channel (for example, smua.contact.threshold
applies to SMU channel A)
Details
The threshold should be set to less than 1 kΩ.
Example
smua.contact.threshold = 5
Set the contact check threshold for SMU channel A to 5 Ω.
Also see
Contact check connections (on page 2-51)
Contact check measurements
(on page 2-37)
reset()
(on page 7-155)
smuX.contact.check()
(on page 7-189)
smuX.reset()
(on page 7-211)

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English