Data Logging and Digitizing with a Digital Multimeter (DMM) — It’s About Time!
應用說明
Automobiles, appliances, and other products are using more and more electronic components. Engineers use digital multimeters (DMMs) to build, characterize, and test these products. Measuring long-term trends (drift) and short-term (transient) events helps engineers understand their impact on product response and quality.
Keysight’s family of Truevolt DMMs provides the accuracy and speed needed to capture events of any duration in a single instrument. From logging drift to digitizing transient events, it’s about time.
The data logging and digitizing features of Keysight’s 34465A 6½-digit and 34470A 7½-digit DMMs operate from the front panel, a simpler alternative to remote programming and data transfer.
Table of contents
- How Do I Use These Features?
- Capturing Data Over Time — Data Logging
- About the sample interval
- Capturing Transient Events — Digitizing
- About the sample rate
- PathWave BenchVue Software Solution
Capturing Transient Events — Digitizing
Digitizing is the process of converting a continuous analog signal into a series of discrete samples or readings, providing additional insights into the signal’s characteristics.
Different from data logging, digitizing often occurs in 1 second or less. The 34465A and 34470A can digitize at a maximum rate of 50,000 readings per second (50 kHz).
When digitizing, you specify the following:
- sample rate
- duration (time or the number of points to digitize)
- specific triggering conditions (level or external triggering, pre-trigger readings)
As with data logging, selecting the DMM’s trend chart display provides a graphic representation of the digitized signal that you can compare to the source (input) signal.