Voltcraft VC-820

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Voltcraft VC-820

The Voltcraft VC-820 is a 4000 counts, CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.

Hardware

Multimeter:

RS232 cable:

USB cable:

Photos

Multimeter:

  • Device, front

  • Device, back

  • Device, back w/o battery

  • Battery 1

  • Battery 2

  • Device, open

  • Device, open 2

  • Cover 1

  • Cover 2

  • Shielding

  • IR assembly

  • IR PCB, top

  • IR PCB, bottom

  • PCB, front

  • PCB, back

  • PCB, top

  • PCB, light 1

  • PCB, light 2

  • FS9721_LP3

  • Crystal

  • LCD, front

  • LCD, back

  • LCD, all segments

RS232 cable:

See Device cables#UNI-T_UT-D01.

USB cable:

See Device cables#UNI-T_UT-D04.

Protocol

The connection to the PC is done using a cable which converts the optical signal (IR) on the multimeter to RS232.

The serial connection uses 2400 baud (hardcoded, cannot be changed) with 8n1 settings. The multimeter transmits 14-byte data packets periodically, the host can not send any commands whatsoever, only read the transmitted data.

A short protocol description is available from Voltcraft/Conrad.

Resources

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