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Model 2657A High Power System SourceMeter® Instrument Reference Manual
Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012
7-191
Details
If you attempt to perform a contact resistance measurement when any of the following conditions exist, an error
will be generated.
When the output is on and any of the following:
•
SMU is a current source with current range set to less than 1 mA (error code 5065, "I range too low for
contact check")
•
SMU is a voltage source with current limit set to less than 1 mA (error code 5050, "I limit too low for
contact check")
When the output is off and any of the following:
•
The output off mode is High-Z (error code 5048, "Contact check not valid with HIGH-Z OUTPUT off")
•
The output off mode is Normal with the
smu
X
.source.offfunc
attribute set to
smu
X
.OUTPUT_DCVOLTS
and the off current limit set to less than 1 mA (error code 5066,
"source.offlimiti too low for contact check")
•
The output off mode is Normal with the
smu
X
.source.offfunc
attribute set to
smu
X
.OUTPUT_DCAMPS
and the source range is less than 1 mA (error code 5065, "I range too low for
contact check")
Example
if not smua.contact.check() then
smua.contact.speed = smua.CONTACT_SLOW
rhi, rlo = smua.contact.r()
print(rhi, rlo)
exit()
end
Check contacts against threshold.
Set speed for SMU channel A to slow.
Get resistance readings.
Output contact resistances to the host.
Terminate execution.
Also see
(on page 2-51)
(on page 2-37)
(on page 7-189)
(on page 7-191)
smuX.contact.speed
This attribute stores the speed setting for contact check measurements.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Attribute (RW)
Yes
Instrument reset
SMU reset
Recall setup
Not saved
0 (smuX.CONTACT_FAST)
Usage
speedSetting
= smu
X
.contact.speed
smu
X
.contact.speed =
speedSetting
speedSetting
The speed setting. Set to one of the following:
0
or
smu
X
.CONTACT_FAST
1
or
smu
X
.CONTACT_MEDIUM
2
or
smu
X
.CONTACT_SLOW
X
Source-measure unit (SMU) channel (for example,
smua.contact.speed
applies
to SMU channel A)
Содержание 2657A
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