Hi. I'm Daniel Bogdanoff from Keysight, and today we're going to take a quick look
at the 34460 and 34470 Series Truevolt DMMs
and learn how to get quick, accurate measurements with help from built-in graphical displays.
DMMs are the tool of choice if you need to make highly accurate measurements,
especially for low-level signals.
These Truevolt DMMs have a few helpful bonus features built in.
In addition to the standard digits view of your measurements,
you can also add in a bar meter mode, a trend chart, and a measurement histogram view.
The bar meter gives you an analog-style meter display,
giving you a way to do a quick visual check of your measurements.
The histogram mode gives you a statistical view of your measurements over time.
Or if you're not a fan of the histogram, you may still find the built-in data-logging mode useful.
The data-logging tool allows you to record and export data into BenchVue
or the analysis tool of your choice.
How do you get your data to the PC?
Use the USB interface that comes standard on all models,
the LXI LAN connection that comes standard on most models,
or the optional GPIB module.
These ports are all on the back of the DMM,
where you'll also find a second set of connection terminals.
With these DMMs, you can also be confident you are measuring the actual signal
and not instrument error.
Truevolt DMMs have 30% less injected current than other alternatives.
For those of you who aren't familiar with the concept,
injected current in a DMM is a low-level current
that comes from the DMM's internal earth reference circuitry, like the transformer.
Since the DMM has floating inputs, this current does not normally affect your measurements.
However, injected current can appear when your device under test's signal
is also earth referenced.
The injected current will affect your AC measurements
if your signal is earth referenced or if your signal is poorly isolated from earth ground.
Like I said, the Keysight 34460 and 34470 Series Truevolt meters
have 30% less injected current than other alternatives.
These meters also use a direct sampling technique to make AC RMS measurements.
That means you get a faster response time than other 6.5- or 7-digit meters,
which all use the standard analog RMS converter infrastructure.
The direct sampling approach used here means the meter will respond more quickly
to a change in signal.
It also allows for crest factors of up to 10 without additional error terms.
Crest factor, by the way, is the ratio of a signal's peak value to its RMS value.
A signal with high frequency spikes will often have a high crest factor,
which can cause issues for a lot of DMMs.
With Keysight's unique patented sampling architecture, though,
this isn't the case.
Get 5,000 readings a second for DC voltage, DC current, and resistance measurements;
up to 250 measurements a second per AC voltage or AC current measurements;
and up to 800 measurements per second for frequency and period.
Of course, all Truevolt DMM specs are tested for compliance with ISO / IEC 17025 standards,
so you get an accuracy guarantee.
Speaking of accuracy, get down to 16 ppm voltage accuracy on the 34470A
and 30 to 75 ppm on the 34460 Series DMMs.
Complete your DMM setup with a 34138A test set lead, a 34190A rack-mount kit,
and BenchVue control software.
You can find more information and model-specific specs in the data sheet.
As we wrap up here, make sure to check out the white papers covering DMM safety tips
and DMM damage-prevention tips.
Links for those are in this video's description.
Thanks for watching.
For configuration questions or for a demo, contact your local Keysight representative.