Difference between revisions of "Voltcraft VC-840"
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[[File:Voltcraft vc840 device front.jpg|thumb|right|Voltcraft VC-840]] | [[File:Voltcraft vc840 device front.jpg|thumb|right|Voltcraft VC-840]] | ||
The [http://www.conrad.de/ce/de/product/123295/VOLTCRAFT-VC840-DMM/SHOP_AREA_17622&promotionareaSearchDetail=005 Voltcraft VC-840] is a CAT IV (600V) handheld digital multimeter with RS232 or | The [http://www.conrad.de/ce/de/product/123295/VOLTCRAFT-VC840-DMM/SHOP_AREA_17622&promotionareaSearchDetail=005 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 about the device. | See [[Voltcraft VC-840/Info]] for more details (such as '''lsusb -vvv''' output) about the device. | ||
== Hardware == | == Hardware == | ||
Multimeter: | '''Multimeter''': | ||
* '''Multimeter IC''': [http://www.ic-fortune.com/eng/new_product3_3.asp Fortune Semiconductor FS9721_LP3] ([http://www.ic-fortune.com/upload/Download/FS9721_LP3-DS-20_EN.pdf datasheet]) | * '''Multimeter IC''': [http://www.ic-fortune.com/eng/new_product3_3.asp Fortune Semiconductor FS9721_LP3] ([http://www.ic-fortune.com/upload/Download/FS9721_LP3-DS-20_EN.pdf datasheet]) | ||
* ... | * ... | ||
[http://www.conrad.de/ce/de/product/125640/VOLTCRAFT-RS-232-SCHNITTSTELLENADAPTER/SHOP_AREA_17626&promotionareaSearchDetail=005 RS232 cable]: | '''[http://www.conrad.de/ce/de/product/125640/VOLTCRAFT-RS-232-SCHNITTSTELLENADAPTER/SHOP_AREA_17626&promotionareaSearchDetail=005 RS232 cable]''': | ||
* TODO | * TODO | ||
[http://www.conrad.de/ce/de/product/120317/Voltcraft-USB-SCHNITTSTELLENADPTER/SHOP_AREA_17626&promotionareaSearchDetail=005 USB cable]: | '''[http://www.conrad.de/ce/de/product/120317/Voltcraft-USB-SCHNITTSTELLENADPTER/SHOP_AREA_17626&promotionareaSearchDetail=005 USB cable]''': | ||
* TODO | * TODO | ||
== Photos == | == Photos == | ||
TODO | '''Multimeter''': | ||
TODO. | |||
'''RS232 cable''': | |||
<gallery> | <gallery> | ||
File:Voltcraft dmm rs232 cable.jpg|<small>Cable</small> | File:Voltcraft dmm rs232 cable.jpg|<small>Cable</small> | ||
| Line 28: | Line 30: | ||
File:Voltcraft dmm rs232 cable pcb back.jpg|<small>PCB, back</small> | File:Voltcraft dmm rs232 cable pcb back.jpg|<small>PCB, back</small> | ||
</gallery> | </gallery> | ||
'''USB cable''': | |||
TODO. | |||
== Protocol == | == Protocol == | ||
Revision as of 12:25, 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: TODO.
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.