Difference between revisions of "V&A VA18B"

From sigrok
Jump to navigation Jump to search
m
Line 7: Line 7:
== Model overview ==
== Model overview ==


There seems to 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 [http://www.mikrocontroller.net/topic/160215#2032176], also the software from [http://www.elv.de/digital-multimeter-va18b-mit-pc-link.html here]), the newer revisions use a Prolific PL2303 chip.
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 [http://www.mikrocontroller.net/topic/160215#2032176], also the software from [http://www.elv.de/digital-multimeter-va18b-mit-pc-link.html 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:
* [http://www.mastech.com.cn/html/en/products-va15-17.htm Mastech VA17B]
* ...


Rebranding of Mastech multimeters in this series:
Rebranding of Mastech multimeters in this series:
Line 13: Line 17:
* [http://www.velleman.eu/products/view/?id=372254 Velleman DVM1000] (no PC connectivity)
* [http://www.velleman.eu/products/view/?id=372254 Velleman DVM1000] (no PC connectivity)
* [http://www.velleman.eu/products/view/?id=372240 Velleman DVM1100] (no PC connectivity)
* [http://www.velleman.eu/products/view/?id=372240 Velleman DVM1100] (no PC connectivity)
* [http://www.velleman.eu/products/view/?id=372236 Velleman DVM1200] (USB), rebranded [http://www.mastech.com.cn/html/en/products-va15-17.htm Mastech VA17B] (run "strings" on some software files)
* [http://www.velleman.eu/products/view/?id=372236 Velleman DVM1200] (USB), this is a [http://www.thebits.info/general/n56fu-172.htm#comment-6052 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)
* [http://www.velleman.eu/products/view/?id=372566 Velleman DVM1400] (no PC connectivity)
* [http://www.velleman.eu/products/view/?id=372566 Velleman DVM1400] (no PC connectivity)


Revision as of 12:18, 23 June 2012

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 [1], 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:

Rebranding of Mastech multimeters in this series:

Hardware

Multimeter:

  • ...

USB cable:

  • Prolific PL2303HX YR0903A
  • 12MHz crystal

Photos

  • Device, front

  • PCB, front

  • PCB, back

  • USB cable

  • USB cable PCB, front

  • USB cable PCB, back

Protocol

14-byte LCD segments over USB-2-serial (Prolific PL2303 chip, 2400 baud, 8n1), see various links below.

To enable output to the PC on the multimeter you have to keep the "Hz/DUTY" key pressed while powering on the device.

Resources

Retrieved from "https://sigrok.org/w/index.php?title=V%26A_VA18B&oldid=2374"