Review: PeakTech 3440 True Graphics Multimeter

The PeakTech 3440's Graphics Mode

Measurements can also be executed in the graphic mode. To do this, press button F1 to get into the graphics menu. The measurement sampling rate can be set from 0.2 s to 10 s intervals using buttons F2 and F3 and then button F1 can be used to start measuring. Button F4 (cancel) exits the graphics menu.

A running measurement can be stopped using F4. You can then save the results using F1 or return with F4 again.

The real highlight of this multimeter is its ability to connect to a PC. To do this, you must install the enclosed software on the PC, plug in the included USB Bluetooth stick to a spare USB port on the PC and activate its driver. Now you only have to turn on Bluetooth on the multimeter under Settings. After starting the PC software you still need to pair the multimeter with the PC.

On the left of the screen you can see a similar representation of the multimeter display.
The graphic representation can be started using the ‘Play’ symbol. In addition to the graph you can also view statistical data (Min, Max, Average values).
After stopping the measurement, you can save the result in various formats (for example as .txt, .csv or .xls) for further processing and documentation.

For some measurements, I noticed there were transmission errors (OL) occurring when range changes occur. The same thing happens when using DMM Tool, another piece of PC software from Peaktech. When the measurement ranges are switched manually there are no such errors. The graphics shown on the multimeter are always error-free.

Running on my admittedly aged PC under Windows 7, it was not possible to display all five readings per second when sampling at the fastest rate; it usually only managed to show three out of five.