Difference between revisions of "Voltcraft VC-840"
Jump to navigation
Jump to search
Uwe Hermann (talk | contribs) m |
|||
| Line 6: | Line 6: | ||
| counts = 4000 | | counts = 4000 | ||
| categories = CAT IV (600V) | | categories = CAT IV (600V) | ||
| connectivity = [[Device_cables#UNI-T_UT- | | connectivity = [[Device_cables#UNI-T_UT-D02|RS232]] / [[Device_cables#UNI-T_UT-D04|USB]] | ||
| measurements = voltage, capacitance, continuity, diode | | measurements = voltage, capacitance, continuity, diode, frequency, temperature, current, duty cycle | ||
| features = hold, relative | | features = autorange, true-rms, hold, relative | ||
| website = [http://www.conrad.de/ce/de/product/123295/VOLTCRAFT-VC840-DMM/SHOP_AREA_17622&promotionareaSearchDetail=005 conrad.de] | | website = [http://www.conrad.de/ce/de/product/123295/VOLTCRAFT-VC840-DMM/SHOP_AREA_17622&promotionareaSearchDetail=005 conrad.de] | ||
}} | }} | ||
| Line 39: | Line 39: | ||
File:Voltcraft vc840 battery1.jpg|<small>Battery 1</small> | File:Voltcraft vc840 battery1.jpg|<small>Battery 1</small> | ||
File:Voltcraft vc840 battery2.jpg|<small>Battery 2</small> | File:Voltcraft vc840 battery2.jpg|<small>Battery 2</small> | ||
File:Voltcraft vc840 pcb front.jpg|<small>PCB, front</small> | |||
File:Voltcraft vc840 pcb back.jpg|<small>PCB, back</small> | File:Voltcraft vc840 pcb back.jpg|<small>PCB, back</small> | ||
File:Voltcraft vc840 ad737j.jpg|<small>Analog Devices AD737J</small> | File:Voltcraft vc840 ad737j.jpg|<small>Analog Devices AD737J</small> | ||
File:Voltcraft vc840 fs9721 lp3.jpg|<small>Fortune Semi. FS9721_LP3</small> | File:Voltcraft vc840 fs9721 lp3.jpg|<small>Fortune Semi. FS9721_LP3</small> | ||
| Line 55: | Line 55: | ||
== Protocol == | == Protocol == | ||
See [[Multimeter_ICs#Fortune_Semiconductor_FS9721_LP3]]. | See [[Multimeter_ICs#Fortune_Semiconductor_FS9721_LP3]] for the DMM IC protocol. | ||
Depending on the cable, additional decoding is needed, though. | |||
TODO: Serial cable vs. the two USB HID based cables. | |||
A [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/123295-da-01-en-RS232_Protocol_VOLTCRAFT_VC840_DMM.pdf short protocol description is also available from Voltcraft/Conrad]. And [http://www2.produktinfo.conrad.com/datenblaetter/100000-124999/121112-da-01-en-Digitalmultimeter_VC840_Schnittstellenp.pdf another one]. | A [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/123295-da-01-en-RS232_Protocol_VOLTCRAFT_VC840_DMM.pdf short protocol description is also available from Voltcraft/Conrad]. And [http://www2.produktinfo.conrad.com/datenblaetter/100000-124999/121112-da-01-en-Digitalmultimeter_VC840_Schnittstellenp.pdf another one]. | ||
| Line 61: | Line 65: | ||
== Resources == | == Resources == | ||
* [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/123295-an-01-ml-VOLTCRAFT_VC840_DMM_de_en_fr_nl.pdf Manual] | |||
* [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/123295-up-01-en-Win7_32_64_Bit_VC840_DMM.zip Vendor software] | |||
* [http://www.gecius.de/linux/vc840/ gecius.de: Multimeter VC840] | * [http://www.gecius.de/linux/vc840/ gecius.de: Multimeter VC840] | ||
* [http://cw.kolleegium.ch/vc840/ kolleegium.ch: VC 840 Recorder] | * [http://cw.kolleegium.ch/vc840/ kolleegium.ch: VC 840 Recorder] | ||
Revision as of 16:27, 15 December 2012
 | |
| Status | planned |
|---|---|
| Counts | 4000 |
| IEC 61010-1 | CAT IV (600V) |
| Connectivity | RS232 / USB |
| Measurements | voltage, capacitance, continuity, diode, frequency, temperature, current, duty cycle |
| Features | autorange, true-rms, hold, relative |
| Website | conrad.de |
The Voltcraft VC-840 is a 4000 counts, CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
Hardware
Multimeter:
- Multimeter IC: Fortune Semiconductor FS9721_LP3 (datasheet)
- Low power, True RMS-to-DC converter: Analog Devices AD737J (datasheet)
- Unknown SO-8 chip: ?
- Crystal: likely 4MHz (not verified, though)
- Fuses: 10A/250V and 500mA/250V (one glass fuse, one HRV fuse)
RS232 cable:
USB cable:
Photos
Multimeter:
Device, front
Device, back
Device, back w/o battery
Battery 1
Battery 2
PCB, front
PCB, back
Analog Devices AD737J
Fortune Semi. FS9721_LP3
RS232 cable:
See Device cables#UNI-T_UT-D02.
USB cable:
See Device cables#UNI-T_UT-D04.
Protocol
See Multimeter_ICs#Fortune_Semiconductor_FS9721_LP3 for the DMM IC protocol.
Depending on the cable, additional decoding is needed, though.
TODO: Serial cable vs. the two USB HID based cables.
A short protocol description is also available from Voltcraft/Conrad. And another one.