Idiomas disponibles
Idiomas disponibles
3 Features and Functions
Measurement Input
The DAQ970A/DAQ973A allows you to combine a DMM (either internal or external) with multiplexer channels to
create a scan. During a scan, the instrument connects the DMM to the configured multiplexer channels one at a time
and makes a measurement on each channel.
Any channel that can be "read" by the instrument can also be included in a scan. This includes any combination of
temperature, voltage, resistance, current, frequency, or period measurements on multiplexer channels. A scan can
also include a read of a digital port, a read via the sense channel, or a read of the totalizer count on the multifunction
module.
The internal DMM
A transducer or sensor converts a physical quantity being measured into an electrical signal which can be measured
by the internal DMM. To make these measurements, the internal DMM incorporates the following functions:
– Temperature (thermocouple, RTD, and thermistor)
– Voltage (DC and AC up to 300 V)
– Resistance (2-wire and 4-wire up to 1GΩ)
– Current (DC and AC up to 1 A)
– Frequency and Period (up to 300 kHz)
The internal DMM provides a universal input front-end for measuring a variety of transducer types without the need
for additional external signal conditioning. The internal DMM includes signal conditioning, amplification (or
attenuation), and a high resolution (up to 22 bits) analog-to-digital converter. A simplified diagram of the internal
DMM is shown below:
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Keysight DAQ970A/DAQ973A User's Guide
