Model 2450 Interactive SourceMeter® Instrument Reference Manual
Section 6: SCPI command reference
2450-901-01 Rev. B/September 2013
6-49
[:SENSe[1]]:<function>:OCOMpensated
This command enables or disables offset compensation for resistance measurements.
Type
Affected by
Where saved
Default value
Command and query
Recall settings
Instrument reset
Power cycle
Measure configuration list
Save settings
Measure configuration list
0 (OFF)
Usage
[:SENSe[1]]:RESistance:OCOMpensated <b>
[:SENSe[1]]:RESistance:OCOMpensated?
<b>
Turn on offset compensation:
1
or
ON
Turn off offset compensation:
0
or
OFF
Details
The voltage offsets because of the presence of thermal EMFs (V
EMF
) can adversely affect resistance
measurement accuracy. To overcome these offset voltages, you can use offset-compensated ohms.
Example
*RST
:SENS:FUNC "RES"
:SENS:RES:RANG:AUTO ON
:RES:OCOM ON
:COUNT 5
:OUTP ON
:TRAC:TRIG "defbuffer1"
:TRAC:DATA? 1, 5, "defbuffer1", SOUR, READ
:OUTP OFF
Reset the instrument.
Set the measurement function to resistance.
Turn offset-compensated ohms on.
Turn the output on.
Make a measurement.
Turn the output off.
Also see
(on page 2-96)
[:SENSe[1]]:FUNCtion[:ON]
This command selects which type of measurement is active: current, voltage, or resistance.
Type
Affected by
Where saved
Default value
Command and query
Recall settings
Instrument reset
Power cycle
Measure configuration list
Save settings
Measure configuration list
CURR
Usage
[:SENSe[1]]:FUNCtion[:ON] <function>
[:SENSe[1]]:FUNCtion[:ON]?
<function>
A string that contains the measurement function to make active:
•
Current:
CURRent[:DC]
•
Voltage:
VOLTage[:DC]
•
Resistance:
RESistance
