Difference between revisions of "Voltcraft VC-870"
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| connectivity = [[Device_cables#UNI-T_UT-D02|RS232]] / [[Device_cables#UNI-T_UT-D04|USB]] | | connectivity = [[Device_cables#UNI-T_UT-D02|RS232]] / [[Device_cables#UNI-T_UT-D04|USB]] | ||
| measurements = voltage, resistance, diode, continuity, capacitance, frequency, current, temperature, loop current, power + apparent power, power factor + frequency, effective voltage + current | | measurements = voltage, resistance, diode, continuity, capacitance, frequency, current, temperature, loop current, power + apparent power, power factor + frequency, effective voltage + current | ||
| features = autorange, hold, relative, backlight, min, max, minmax, true-rms | | features = autorange, hold, relative, backlight, min, max, minmax, true-rms, bargraph | ||
| website = [http://www.conrad.de/ce/de/product/124603/Hand-Multimeter-digital-VOLTCRAFT-VC870-CAT-III-1000-V-CAT-IV-600-V-Anzeige-Counts-40000 conrad.de] | | website = [http://www.conrad.de/ce/de/product/124603/Hand-Multimeter-digital-VOLTCRAFT-VC870-CAT-III-1000-V-CAT-IV-600-V-Anzeige-Counts-40000 conrad.de] | ||
}} | }} | ||
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'''Multimeter''': | '''Multimeter''': | ||
* ... | |||
We don't have teardown photos yet, but [http://www.all-electronics.de/texte/anzeigen/43807/Digitalmultimeter-VC870 this article] (see also [http://www.all-electronics.de/upl/text/43/43807/media/23736.jpg this photo]) claims that the DMM contains the following components: | |||
* '''4 3/4 and 5 3/4 digits ADC''': [http://www.cyrustek.com.tw/product-1-44000.htm#ES51966 Cyrustek ES51966] ([http://www.cyrustek.com.tw/spec/ES51966A.pdf datasheet]) | |||
* '''Microcontroller''': Texas Instruments MSP430 | |||
* '''Voltage regulators''': TPS76301, 7201u55 | |||
* '''EEPROM''': Atmel "748" | |||
* '''True RMS-to-DC converter''': [http://www.analog.com/en/special-linear-functions/rms-to-dc-converters/ad737/products/product.html Analog Devices AD737] ([http://www.analog.com/static/imported-files/data_sheets/AD737.pdf datasheet]) | |||
'''RS232 cable:''' | '''RS232 cable:''' | ||
| Line 43: | Line 49: | ||
Some (partially incorrect and also incomplete) [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/124603-in-01-en-Interfaceprotokoll_VC_870_DMM.pdf protocol docs] are available from the vendor. | Some (partially incorrect and also incomplete) [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/124603-in-01-en-Interfaceprotokoll_VC_870_DMM.pdf protocol docs] are available from the vendor. | ||
The interface parameters for the [[Device cables#UNI-T_UT-D02|UNI-T UT-D02]] serial cable are '''9600/8n1'''. | |||
A packet consists of 23 bytes. | |||
Notes: | |||
* The bargraph value (only shown on the LCD for voltage, current, and resistance mode) is '''not''' contained in the protocol. | |||
* The auto-poweroff feature which powers the device off after 15 minutes is always disabled when the PC interface is "active" (i.e. the user pressed the REL/PC button for 1 second). Thus the respective "auto-poweroff" bit/flag, which '''is''' contained in the protocol, always has the same value. | |||
* The backlight status (on/off) '''is''' contained in the protocol. | |||
== Resources == | == Resources == | ||
| Line 48: | Line 63: | ||
* [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/124603-an-01-ml-VOLTCRAFT_VC_870_DMM_de_en_fr_nl.pdf Manual] | * [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/124603-an-01-ml-VOLTCRAFT_VC_870_DMM_de_en_fr_nl.pdf Manual] | ||
* [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/124603-up-01-ml-VC_870_Ver_4_2_6_von_XP_bis_WIN7.zip Vendor software] | * [http://www.produktinfo.conrad.com/datenblaetter/100000-124999/124603-up-01-ml-VC_870_Ver_4_2_6_von_XP_bis_WIN7.zip Vendor software] | ||
* [http://www.all-electronics.de/texte/anzeigen/43807/Digitalmultimeter-VC870 all-electronics.de: Voltcraft VC-870 review with photos] (German) | |||
[[Category:Device]] | [[Category:Device]] | ||
[[Category:Multimeter]] | [[Category:Multimeter]] | ||
[[Category:Planned]] | [[Category:Planned]] | ||
Revision as of 20:53, 29 December 2014
| File:Voltcraft vc870.png | |
| Status | planned |
|---|---|
| Source code | serial-dmm |
| Counts | 40000 |
| IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
| Connectivity | RS232 / USB |
| Measurements | voltage, resistance, diode, continuity, capacitance, frequency, current, temperature, loop current, power + apparent power, power factor + frequency, effective voltage + current |
| Features | autorange, hold, relative, backlight, min, max, minmax, true-rms, bargraph |
| Website | conrad.de |
The Voltcraft VC-870 is a 40000 counts, CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
Hardware
Multimeter:
We don't have teardown photos yet, but this article (see also this photo) claims that the DMM contains the following components:
- 4 3/4 and 5 3/4 digits ADC: Cyrustek ES51966 (datasheet)
- Microcontroller: Texas Instruments MSP430
- Voltage regulators: TPS76301, 7201u55
- EEPROM: Atmel "748"
- True RMS-to-DC converter: Analog Devices AD737 (datasheet)
RS232 cable:
USB cable:
Photos
Multimeter:
RS232 cable:
See Device cables#UNI-T_UT-D02.
USB cable:
See Device cables#UNI-T_UT-D04.
Protocol
Some (partially incorrect and also incomplete) protocol docs are available from the vendor.
The interface parameters for the UNI-T UT-D02 serial cable are 9600/8n1.
A packet consists of 23 bytes.
Notes:
- The bargraph value (only shown on the LCD for voltage, current, and resistance mode) is not contained in the protocol.
- The auto-poweroff feature which powers the device off after 15 minutes is always disabled when the PC interface is "active" (i.e. the user pressed the REL/PC button for 1 second). Thus the respective "auto-poweroff" bit/flag, which is contained in the protocol, always has the same value.
- The backlight status (on/off) is contained in the protocol.