This subsystem configures AC voltage, DC voltage, and ratio measurements.
[SENSe:]VOLTage:{AC|DC}:NULL[:STATe]
[SENSe:]VOLTage:{AC|DC}:NULL:VALue
[SENSe:]VOLTage:{AC|DC}:NULL:VALue:AUTO
[SENSe:]VOLTage:{AC|DC}:RANGe:AUTO
[SENSe:]VOLTage[:DC]:APERture:ENABled
[SENSe:]VOLTage[:DC]:IMPedance:AUTO
[SENSe:]VOLTage[:DC]:RATio:SECondary
[SENSe:]VOLTage[:DC]:RESolution
[SENSe:]VOLTage[:DC]:SECondary
[SENSe:]VOLTage[:DC]:ZERO:AUTO
Sets the bandwidth for AC voltage measurements.
The instrument uses three different AC filters that enable you either to optimize low frequency accuracy or to achieve faster AC settling times following a change in input signal amplitude. The instrument selects the slow (3 Hz), medium (20 Hz) or fast (200 Hz) filter based on the cutoff frequency specified by this command. Specify the lowest frequency that you expect to encounter.
Parameter | Typical Return |
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{3 Hz|20 Hz|200 Hz}. Default: 20Hz. | +2.00000000E+01 |
Make and read an AC voltage measurement. Use the 3 Hz filter bandwidth: CONF:VOLT:AC 100 |
Input Frequency | Default Settling Delay |
---|---|
3 Hz - 300 kHz (Slow) | 2.5000 s/measurement |
20 Hz - 300 kHz (Medium) | 0.6250 s/measurement |
200 Hz - 300 kHz (Fast) | 0.0250 s/measurement |
Enables or disables the null function for AC or DC voltage measurements.
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This parameter setting is not shared between AC and DC measurements. The parameters are independent for AC and DC measurements. |
Parameter | Typical Return |
---|---|
{ON|1|OFF|0}. Default: OFF. | 0 (OFF) or 1 (ON) |
Configure AC voltage measurements, using the null function to subtract 100 mV from the measurements. Make and read two measurements: CONF:VOLT:AC Typical Response: +1.04530000E+00,+1.04570000E+00 |
Stores a null value for voltage measurements.
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This parameter setting is not shared between AC and DC measurements. The parameters are independent for AC and DC measurements. |
Parameter | Typical Return |
---|---|
-1200 to +1200 V. Default: 0. | +1.00000000E-02 |
Configure AC voltage measurements, using the null function to subtract 100 mV from the measurements. Make and read two measurements: CONF:VOLT:AC Typical Response: +1.04530000E+00,+1.04570000E+00 |
Enables or disables automatic null value selection for AC voltage or DC voltage measurements.
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This parameter setting is not shared between AC and DC measurements. The parameters are independent for AC and DC measurements. |
Parameter | Typical Return |
---|---|
{ON|1|OFF|0}. Default: OFF. | 0 (OFF) or 1 (ON) |
Configure AC voltage measurements, using the null function to subtract 100 mV from the measurements. Make and read two measurements: CONF:VOLT:AC Typical Response: +1.04530000E+00,+1.04570000E+00 Make a second set of measurements using automatic null value selection: Typical Response: +0.00000000E+00,+0.01420000E+00 |
Selects a fixed measurement range for AC and DC voltage measurements and DC ratio measurements.
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This parameter setting is not shared between AC and DC measurements. The parameters are independent for AC and DC measurements. |
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The maximum range parameter (MAX) is 1000 V. However, the SAFETY LIMIT on the front and rear HI/LO input terminals is 750 VAC (rms). The rms voltage is waveform dependent. A sine wave is limited to 750 VAC (rms), but a 1000 Vpk square wave is safe. Connection to AC mains power is further limited to CAT II (300 V). See Safety and Regulatory Information for more information on the safety features and the safe operation of this instrument. |
Parameter | Typical Return |
---|---|
<range>: {100 mV|1 V|10 V|100 V|1000 V} AC default: 10 V |
+1.00000000E+01 |
Configure AC voltage measurements using the 100 V range. Make and read two measurements: Typical Response: +3.24530000E+01,+3.24570000E+01 |
Disables or enables autoranging for AC and DC voltage measurements and for DC ratio 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.
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This parameter setting is not shared between AC and DC measurements. The parameters are independent for AC and DC measurements. |
|
The maximum range parameter (MAX) is 1000 V. However, the SAFETY LIMIT on the front and rear HI/LO input terminals is 750 VAC (rms). The rms voltage is waveform dependent. A sine wave is limited to 750 VAC (rms), but a 1000 Vpk square wave is safe. Connection to AC mains power is further limited to CAT II (300 V). See Safety and Regulatory Information for more information on the safety features and the safe operation of this instrument. |
Parameter | Typical Return |
---|---|
{ON|1|OFF|0}. Default: ON. | 0 (OFF) or 1 (ON) |
Configure DC voltage measurements and perform an immediate autorange. Make and read two measurements: Typical Response: +1.04530000E+01,+1.04570000E+01 |
Selects the secondary measurement function for AC voltage measurements.
Parameter | Typical Return |
---|---|
{"OFF"|"CALCulate:DATA"|"FREQuency"|"VOLTage[:DC]"}, default "OFF" |
"CALC:DATA" |
Configure AC voltage measurements using the 100 V range. Select frequency as the secondary measurement. Make and retrieve measurements. CONF:VOLT:AC 100 Typical Response: +8.54530000E+01;+1.00000000E+03 |
Specifies the integration time in seconds (called aperture time) for dc voltage measurements.
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Use this command for precise control of the DMM's integration time. Use NPLC (see [SENSe:]VOLTage[:DC]:NPLC) for better power-line noise rejection characteristics (NPLC > 1). |
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 time mode, set the aperture time to 300 ms: VOLT:APER:ENAB ON |
Enables the setting of integration time in seconds (called aperture time) for dc voltage measurements. If aperture time mode is disabled (default), the integration time is set in PLC (power-line cycles).
Parameter | Typical Return |
---|---|
{ON|1|OFF|0}. Default: OFF. | 0 (OFF) or 1 (ON) |
Enable aperture time mode, set the aperture time to 300 ms: VOLT:APER:ENAB ON |
Disables or enables automatic input impedance mode for DC voltage and ratio measurements.
Parameter | Typical Return |
---|---|
{ON|1|OFF|0}. Default: OFF. | 0 (OFF) or 1 (ON) |
Make all DC voltage measurements with a 10 MΩ input impedance: |
Sets the integration time in number of power line cycles (PLC) for DC voltage and ratio 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.
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 DC voltage measurements using a 10 PLC integration time. Then make and read one measurement: Typical Response: +6.27530000E-01 |
Selects the secondary measurement function for DC ratio measurements.
Parameter | Typical Return |
---|---|
{"OFF"|"CALCulate:DATA"|"SENSe:DATA"}, default "OFF" |
"CALC:DATA" |
Configure the instrument for DC voltage ratio measurements using the 100 V range with 1 mV resolution. Select "SENSe:DATA" as the secondary measurement. Make and retrieve measurements. CONF:VOLT:DC:RAT 100,0.001 Typical Response: +1.05294698E+00;+2.10532098E+00,+1.99945584E+00 |
Selects the measurement resolution for DC voltage and ratio measurements. Specify the resolution in the same units as the selected measurement function, not in number of digits.
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-05 |
Configure DC voltage measurements with a 3 µV resolution. Then make and read one measurement: CONF:VOLT:DC 1 |
Selects the secondary measurement function for DC voltage measurements.
Parameter | Typical Return |
---|---|
{"OFF"|"CALCulate:DATA"|"VOLTage:AC"|"PTPeak"}, default "OFF" |
"CALC:DATA" |
Configure DC voltage measurements using the 10 V range with 1 mV resolution. Select peak-to-peak as the secondary measurement. Make and retrieve measurements. CONF:VOLT:DC 10,0.001 Typical Response: -3.44948894E-03;+9.91000000E+3,+9.91000000E+3 |
Disables or enables the autozero mode for DC voltage and ratio measurements.
Parameter | Typical Return |
---|---|
{OFF|ON|ONCE} | 0 (OFF) or 1 (ON) |
Configure DC voltage measurements and immediately autozero. Make and read two measurements: Typical Response: +1.04530000E+01,+1.04570000E+01 |