V&A VA18B

Mastech VA18B

The Mastech VA18B a.k.a. V&A VA18B (V&A is a brand of Mastech) is a CAT II (1000V) handheld digital multimeter with USB connectivity.

See Mastech VA18B/Info for more details (such as lsusb -vvv output) about the device.

Model overview

It seems there have been at least two different revisions of the multimeter (or at least of the PC-Link cable). The older one used a Sunplus SPCP825 USB-to-serial chip (see here, also the software from here), the newer revisions use a Prolific PL2303 chip. Both should work fine with sigrok, as long as the respective driver creates a "virtual COM port" / serial port device sigrok can connect to.

Models:

Mastech VA17B
...

Rebranding of Mastech multimeters in this series:

Velleman DVM1000 (no PC connectivity)
Velleman DVM1100 (no PC connectivity)
Velleman DVM1200 (USB), this is a rebranded Mastech VA18B (running "strings" on "PC-LINK.chm" reveals "VA17B", but that's also the case for the software that ships with the VA18B)
Velleman DVM1400 (no PC connectivity)
Maxwell MX-25328 (USB), this is a rebranded Mastech VA18B (Maxwell wrote their own PC software though, apparently; we confirmed that is works fine with the Mastech VA18B, you just need to select "25328" as device in the Maxwell software)
Peaktech P3375 (USB), very likely a rebranded VA18B (1, 2, 3)