[SENSe:]{RESistance|FRESistance} Subsystem

This subsystem configures two- and four-wire resistance measurements.

Command Summary

[SENSe:]{RESistance|FRESistance}:APERture

[SENSe:]{RESistance|FRESistance}:APERture:ENABled

[SENSe:]{RESistance|FRESistance}:NPLC

[SENSe:]{RESistance|FRESistance}:NULL[:STATe]

[SENSe:]{RESistance|FRESistance}:NULL:VALue

[SENSe:]{RESistance|FRESistance}:NULL:VALue:AUTO

[SENSe:]{RESistance|FRESistance}:OCOMpensated

[SENSe:]{RESistance|FRESistance}:POWer:LIMit[:STATe]

[SENSe:]{RESistance|FRESistance}:RANGe

[SENSe:]{RESistance|FRESistance}:RANGe:AUTO

[SENSe:]{RESistance|FRESistance}:RESolution

[SENSe:]{FRESistance|RESistance}:SECondary

[SENSe:]RESistance:ZERO:AUTO

 

[SENSe:]{RESistance|FRESistance}:APERture {<seconds>|MIN|MAX|DEF}
[SENSe:]{RESistance|FRESistance}:APERture? [{MIN|MAX|DEF}]

Specifies the integration time in seconds (called aperture time) for resistance measurements.

Use this command for precise control of the DMM's integration time. Use NPLC (see [SENSe:]FRESistance:NPLC) for better power-line noise rejection characteristics (NPLC > 1)..

This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

 

Parameter Typical Return

(Without the DIG option) 200 µs to 1 s (2 µs resolution), default: 100 ms. (With the DIG option)  20 µs to 1 s (2 µs resolution), default: 100 ms.

+1.00000000E-01

Enable aperture, set aperture time to 300 milliseconds:

RES:APER:ENAB ON
RES:APER 300E-03

or

FRES:APER:ENAB ON
FRES:APER 300E-03

[SENSe:]{RESistance|FRESistance}:APERture:ENABled {ON|1|OFF|0}
[SENSe:]{RESistance|FRESistance}:APERture:ENABled?

Enables the setting of integration time in seconds (called aperture time) for resistance measurements. If aperture time mode is disabled (default), the integration time is set in PLC (power-line cycles).

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Enable aperture, set aperture time to 300 ms:

RES:APER:ENAB ON
RES:APER 300E-03

or

FRES:APER:ENAB ON
FRES:APER 300E-03

[SENSe:]{RESistance|FRESistance}:NPLC {<PLC>|MIN|MAX|DEF}
[SENSe:]{RESistance|FRESistance}:NPLC? [{MIN|MAX|DEF}]


Sets the integration time in number of power line cycles (PLC) for all resistance measurements. Integration time is the period that the instrument's analog-to-digital (A/D) converter samples the input signal for a measurement. A longer integration time gives better measurement resolution but slower measurement speed.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
0.02, 0.2, 1, 10, 100. Default: 10 (34460A/61A)
0.02, 0.06, 0.2, 1, 10, 100. Default: 10 (34465A/70A without DIG option)
0.001, 0.002, 0.006, 0.02, 0.06, .2, 1, 10, 100. Default: 10 (34465A/70A with DIG option)
See Range, Resolution and NPLC for more information.
+1.00000000E+01

Configure 4-wire resistance measurements using a 10 PLC integration time. Then make and read one measurement:

CONF:FRES
FRES:NPLC 10
READ?

Typical Response: +6.27530000E+01

[SENSe:]{RESistance|FRESistance}:NULL[:STATe] {ON|1|OFF|0}
[SENSe:]{RESistance|FRESistance}:NULL[:STATe]?

Enables or disables the null function for all resistance measurements.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure 2-wire resistance measurements, using the null function to remove 100 mΩ of wiring resistance. Make and read two measurements:

CONF:RES
RES:NULL:STAT ON;VAL .1
SAMP:COUN 2

READ?

Typical Response: +1.04530000E+02,+1.04570000E+02

[SENSe:]{RESistance|FRESistance}:NULL:VALue {<value>|MIN|MAX|DEF}
[SENSe:]{RESistance|FRESistance}:NULL:VALue? [{MIN|MAX|DEF}]

Stores a null value for all resistance measurements.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return

-120 MΩ to +120 MΩ. Default: 0. (34460A/61A)
-1.2 GΩ to +1.2 GΩ. Default: 0. (34465A/70A)

+1.04530000E+02

Configure 2-wire resistance measurements, using the null function to remove 100 mΩ of wiring resistance. Make and read two measurements:

CONF:RES
RES:NULL:STAT ON;VAL .1
SAMP:COUN 2

READ?

Typical Response: +1.04530000E+02,+1.04570000E+02

[SENSe:]{RESistance|FRESistance}:NULL:VALue:AUTO {ON|1|OFF|0}
[SENSe:]{RESistance|FRESistance}:NULL:VALue:AUTO?

Enables or disables automatic null value selection for all resistance measurements.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure 2-wire resistance measurements, using the null function to remove 100 mΩ of wiring resistance. Make and read two measurements:

CONF:RES
RES:NULL:STAT ON;VAL .1
SAMP:COUN 2

READ?

Typical Response: +1.04530000E+02,+1.04570000E+02

Make a second set of measurements using automatic null value selection:

RES:NULL:VAL:AUTO ON
READ?

Typical Response: +0.00000000E+00,+0.01420000E+00

[SENSe:]{RESistance|FRESistance}:OCOMpensated {OFF|ON}
[SENSe:]{RESistance|FRESistance}:OCOMpensated?

Enables or disables offset compensation. Offset compensation removes the effects of small dc voltages in the circuit being measured. The technique involves taking the difference between two resistance measurements, one with the current source set to the normal value, and one with the current source set to a lower value. Enabling Offset Compensation approximately doubles the reading time.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure low-power 2-wire resistance measurements. Enable offset compensation. Make and read two measurements:

RES:POW:LIM ON
RES:OCOM ON
SAMP:COUN 2
READ?

Typical Response: +4.05451008E-03,+4.97391062E-03

[SENSe:]{RESistance|FRESistance}:POWer:LIMit[:STATe] {OFF|ON}
[SENSe:]{RESistance|FRESistance}:POWer:LIMit[:STATe]?


Enables or disables low-power resistance measurements (either 2- or 4-wire).

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
{ON|1|OFF|0}. Default: OFF. 0 (OFF) or 1 (ON)

Configure 4-wire resistance measurements using a 10 PLC integration time. Enable low-power 4-wire resistance measurements. Then make and read one measurement:

CONF:FRES
FRES:NPLC 10
FRES:POW:LIM ON
READ?

Typical Response: +6.27530000E+01

[SENSe:]{RESistance|FRESistance}:RANGe {<range>|MIN|MAX|DEF}
[SENSe:]{RESistance|FRESistance}:RANGe? [{MIN|MAX|DEF}]

Selects a fixed measurement range for all resistance measurements.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
{100 Ω|1 kΩ|10 kΩ|100 kΩ|1 MΩ|10 MΩ|100 MΩ|1 GΩ}. Default: 1 kΩ. +1.00000000E+03

Configure 2-wire resistance measurements using the 10 kΩ range. Then make and read one measurement:

CONF:RES
RES:RANG 10E3
READ?

Typical Response: +6.27530000E+03

See Also

[SENSe:]{RESistance|FRESistance}:RANGe:AUTO

[SENSe:]{RESistance|FRESistance}:RANGe:AUTO {OFF|ON|ONCE}
[SENSe:]{RESistance|FRESistance}:RANGe:AUTO?

Disables or enables autoranging for all resistance measurements. Autoranging is convenient because it automatically selects the range for each measurement based on the input signal. Specifying ONCE performs an immediate autorange and then turns autoranging off.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return

{ON|1|OFF|0}. Default: ON.

0 (OFF) or 1 (ON)

Configure 2-wire resistance measurements and perform an immediate autorange.  Make and read two measurements:

CONF:RES
RES:RANG:AUTO ONCE
SAMP:COUN 2
READ?

Typical Response: +1.04530000E+03,+1.04570000E+03

[SENSe:]{RESistance|FRESistance}:RESolution {<resolution>|MIN|MAX|DEF}
[SENSe:]{RESistance|FRESistance}:RESolution? [{MIN|MAX|DEF}]

Selects the measurement resolution for all resistance measurements. Specify the resolution in the same units as the selected measurement function, not in number of digits.

Note This parameter is common to 2-wire and 4-wire resistance measurements. Using the FRESistance version of this command or query is identical to using the RESistance version.

Parameter Typical Return
<resolution>: See Resolution Table or Range, Resolution and NPLC. The default is equivalent to 10 PLC. Specify <resolution> in the measurement's units (V, A, Hz, Ω, and so on). +3.00000000E+00

Configure 2-wire resistance measurements with a 3 Ω resolution. Then make and read one measurement:

CONF:RES 1E6
RES:RES 3
READ?

Typical Response: +6.27531500E+05

See Also

[SENSe:]{RESistance|FRESistance}:NPLC

[SENSe:]{FRESistance|RESistance}:SECondary {"OFF"|"CALCulate:DATA"}
[SENSe:]{FRESistance|RESistance}:SECondary?

Selects the secondary measurement function for all resistance measurements.

Parameter Typical Return

{"OFF"|"CALCulate:DATA"}, default "OFF"

"CALC:DATA"

Configure resistance and secondary measurements. Make resistance measurement and retrieve secondary measurement.

CONF:RES AUTO,MAX
RES:SEC "CALC:DATA"
READ?;DATA2?

Typical Response: +3.01566373E-10;,+9.91000000E+3

[SENSe:]RESistance:ZERO:AUTO {OFF|ON|ONCE}
[SENSe:]RESistance:ZERO:AUTO?

Disables or enables the autozero mode for 2-wire resistance measurements.

Parameter Typical Return
{OFF|ON|ONCE} 0 (OFF) or 1 (ON)

Configure 2-wire resistance measurements and perform an immediate autozero.  Make and read two measurements:

CONF:RES 1E4
RES:ZERO:AUTO ONCE
SAMP:COUN 2
READ?

Typical Response: +1.04530000E+03,+1.04570000E+03