HP 34970A manual Current Measurement Configuration

Chapter 4 Features and Functions

Current Measurement Configuration

Current Measurement Configuration

To connect a current source to the module’s screw terminals, see page 21.

This section contains information to help you configure the instrument for making current measurements on the HP 34901A multiplexer module. This module has two fused channels for direct dc and ac current measurements on the measurement ranges shown below.

10 mA

100 mA

1 A

Autorange

NCurrent measurements are allowed only on channels 21 and 22 on the HP 34901A module.

UW f

The instrument uses three different ac filters which enable you to either optimize low frequency accuracy or achieve faster ac settling times.

The instrument selects the slow, medium, or fast filter based on the input frequency that you specify for the selected channels.

Applies to ac current and ac voltage measurements only.

Input Frequency	Default Settling Delay	Minimum Settling Delay
3 Hz to 300 kHz (Slow)	7 seconds / reading	1.5 seconds
20 Hz to 300 kHz (Medium)	1 second / reading	0.2 seconds
200 Hz to 300 kHz (Fast)	0.12 seconds / reading	0.02 seconds

∙The instrument selects the medium filter (20 Hz) when the function is changed or after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting.

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