54 34410A/11A/L4411A User’s Guide
2 Features and Functions
The following command (similar queries for current, resistance and temperature)
returns whether aperture mode is enabled:
[SENSe:]VOLTage[:DC]:APERture:ENABled?
This query returns a “0” (disabled) or “1” (enabled).
Refer to the Keysight 34410A/11A/L4411A Programmer’s Reference Help for
a complete description and syntax for these commands.
DC Input Impedance
Applies to dc voltage measurements only.
The default setting for the multimeter’s input impedance is fixed at 10 MΩ for all dc
voltage ranges, to minimize noise pickup. To reduce the effects of measurement loading
errors when making low–voltage measurements, this fixed resistance can be set to HI–Z
(>10 GΩ) for the 100 mVdc, 1 Vdc, and
10 Vdc ranges.
• Front Panel Operation: After the function is selected, press .
INTEGRATION > RANGE > INPUT Z
Select 10 M or HI–Z, and then step through or exit the menu.
Note that when HI–Z is selected, the multimeter will set an input impedance of >10
GΩ for the three lowest dc voltage ranges. The input impedance remains 10 MΩ for
all measurement ranges above 10 Vdc.
• Remote Interface Operation: The following command turns on the auto input
impedance function for dc voltage measurements. The AUTO function (equivalent of
setting HI–Z from the front panel) uses 10 MΩ for the 100V and 1000V ranges, and
>10 GΩ for the 100 mVdc, 1 Vdc and 10 Vdc ranges.
[SENSe:]VOLTage:DC:IMPedance:AUTO {OFF>0>ON>1}
The following command queries the auto impedance function setting:
[SENSe:]VOLTage:DC:IMPedance:AUTO?
This query returns a “0” (OFF) or “1” (ON).
Refer to the Keysight 34410A/11A/L4411A Programmer’s Reference Help for
a complete description and syntax for these commands.
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