Difference between revisions of "Voltcraft VC-920"
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* '''16-bit microcontroller''': [http://www.ti.com/product/msp430f149 Texas Instruments MSP430F149] (markings "TI 87E817T G4 LSD0007 REV N") ([http://www.ti.com/lit/gpn/msp430f149 datasheet]) | * '''16-bit microcontroller''': [http://www.ti.com/product/msp430f149 Texas Instruments MSP430F149] (markings "TI 87E817T G4 LSD0007 REV N") ([http://www.ti.com/lit/gpn/msp430f149 datasheet]) | ||
* '''128 (32 x 4) pattern multi-function LCD driver'''': [http://www.holtek.com.tw/english/docum/consumer/1621.htm Holtek HT1621B] ([http://www.holtek.com.tw/pdf/consumer/ht1621v310.pdf datasheet]) | * '''128 (32 x 4) pattern multi-function LCD driver'''': [http://www.holtek.com.tw/english/docum/consumer/1621.htm Holtek HT1621B] ([http://www.holtek.com.tw/pdf/consumer/ht1621v310.pdf datasheet]) | ||
* '''PCB markings''': The silkscreen reads "71A V20051010-6", but the correct "920" model indication is apparently added manually by UNI-T using a sticker. | |||
'''RS232 cable:''' | '''RS232 cable:''' | ||
Latest revision as of 12:46, 30 December 2014
 | |
| Status | supported |
|---|---|
| Source code | serial-dmm |
| Counts | 40000/4000 |
| IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
| Connectivity | RS232 / USB |
| Measurements | voltage, resistance, diode, continuity, capacitance, frequency, duty cycle, current, temperature |
| Features | autorange, hold, relative, min/max, bargraph, backlight |
| Website | conrad.de |
The Voltcraft VC-920 is a 40000/4000 counts, CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
This is a rebadged UNI-T UT71A.
See UNI-T UT71x series for information common to all devices in this series.
Hardware
Multimeter:
- 44000/440000-count dual-slope ADC: Cyrustek ES51966P (datasheet)
- 16-bit microcontroller: Texas Instruments MSP430F149 (markings "TI 87E817T G4 LSD0007 REV N") (datasheet)
- 128 (32 x 4) pattern multi-function LCD driver': Holtek HT1621B (datasheet)
- PCB markings: The silkscreen reads "71A V20051010-6", but the correct "920" model indication is apparently added manually by UNI-T using a sticker.
RS232 cable:
USB cable:
Photos
Multimeter:
PCB, top
PCB, bottom
RS232 cable:
See Device cables#UNI-T_UT-D02.
USB cable:
See Device cables#UNI-T_UT-D04.
Protocol
See UNI-T UT71x series#Protocol.