Keithley 2461 Reference Manual

M
odel 2461 Interactive SourceMeter® Instrument Reference Manual Section 8:
TSP command reference
2461-901-01 A/November 2015 8-105
smu.contact.threshold
This attribute sets the threshold value for contact resistance for the contact check status functions.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW)
Yes
Instrument reset
Power cycle
Not saved
smu.THRESHOLD_50_OHM
Usage
smu.contact.threshold = level
level = smu.contact.threshold
level
The level of threshold resistance above which the contact check functions indicate a
failure:
• 2 Ω: smu.THRESHOLD_2_OHM
• 15 Ω: smu.THRESHOLD_15_OHM
• 50 Ω:
smu.THRESHOLD_50_OHM
Details
The contact check functions indicate a failure when the connection path resistance exceeds the value
specified by this command.
This command can be sent when contact check isn't enabled. However, you must enable contact
check before checking the status of connections.
Example
smu.contact.threshold = smu.THRESHOLD_15_OHM
print(smu.contact.threshold)
Set the contact check function to indicate a
failure if resistance is greater than 15 Ω.
Query the contact check threshold setting.
Output:
smu.THRESHOLD_15_OHM
Indicates that the contact check threshold is
set to 15
Ω.
Also see
smu.contact.check() (on page 8-102)
smu.contact.checkall() (on page 8-103)
smu.contact.enable (on page 8-104)

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV