UNI-T UT71C
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 | |
| 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, true-rms |
| Website | uni-trend.com |
The UNI-T UT71C is a 40000/4000 counts, CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
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: Unknown, but likely to be Texas Instruments MSP430 model (based on other UT71x models)
- 128 (32 x 4) pattern multi-function LCD driver: HOLTEK HT1621B (datasheet)
- PCB markings: The silkscreen reads "71A(1KV FUSE) V20051010-10", but the correct "C" model indication is apparently added manually by UNI-T using a sharpie.
- Other known variants: "71A(1KV FUSE) V20051010-8", "71A V20051010-8", "71A V20051010-6", "V20051010-4"
RS232 cable:
USB cable:
Photos
PCB, top
PCB, bottom
PCB, bottom low
PCB, bottom high
RS232 cable:
USB cable:
Protocol
See UNI-T UT71x series#Protocol.
Resources
- Specifications
- Manual
- Vendor software
- eevblog.com: Uni-Trend UT71C (teardown)
- amobbs.com: UT71C (teardown)
- amobbs.com: UT71C (another teardown)