Difference between revisions of "Voltcraft VC-840"
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'''Multimeter''': | '''Multimeter''': | ||
<gallery> | |||
File:Voltcraft vc840 device front.jpg | |||
File:Voltcraft vc840 device back1.jpg | |||
File:Voltcraft vc840 device back2.jpg | |||
File:Voltcraft vc840 battery1.jpg | |||
File:Voltcraft vc840 battery2.jpg | |||
File:Voltcraft vc840 pcb back.jpg | |||
File:Voltcraft vc840 pcb front.jpg | |||
File:Voltcraft vc840 ad737j.jpg | |||
File:Voltcraft vc840 fs9721 lp3.jpg | |||
</gallery> | |||
'''RS232 cable''': | '''RS232 cable''': | ||
<gallery> | <gallery> | ||
File:Voltcraft dmm rs232 cable.jpg|<small>Cable</small> | File:Voltcraft dmm rs232 cable.jpg|<small>Cable</small> | ||
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'''USB cable''': | '''USB cable''': | ||
TODO. | TODO. | ||
Revision as of 15:43, 1 July 2012
The Voltcraft VC-840 is a 4000 counts, CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
See Voltcraft VC-840/Info for more details (such as lsusb -vvv output) about the device.
Hardware
Multimeter:
- Multimeter IC: Fortune Semiconductor FS9721_LP3 (datasheet)
- ...
- TODO
- TODO
Photos
Multimeter:
RS232 cable:
Cable
Cable, IR
Cable, open
PCB, front
PCB, back
USB cable:
TODO.
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.
TODO: Optional USB cable.
Resources
TODO.