Difference between revisions of "UNI-T UT71C"
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{{Infobox multimeter | {{Infobox multimeter | ||
| image = [[File: | | image = [[File:Ut71c mugshot.png|180px]] | ||
| name = | | name = UNI-T UT71C | ||
| status = | | status = supported | ||
| source_code_dir = | | source_code_dir = serial-dmm | ||
| counts = 40000/4000 | | counts = 40000/4000 | ||
| categories = CAT III (1000V) / CAT IV (600V) | | categories = CAT III (1000V) / CAT IV (600V) | ||
| Line 9: | Line 9: | ||
| measurements = voltage, resistance, diode, continuity, capacitance, frequency, duty cycle, current, temperature | | measurements = voltage, resistance, diode, continuity, capacitance, frequency, duty cycle, current, temperature | ||
| features = autorange, hold, relative, min/max, bargraph, backlight, true-rms | | features = autorange, hold, relative, min/max, bargraph, backlight, true-rms | ||
| website = [http://uni-trend.com/UT71C.html | | website = [http://uni-trend.com/UT71C.html uni-trend.com] | ||
}} | }} | ||
The ''' | 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 == | == Hardware == | ||
'''Multimeter''': | '''Multimeter''': | ||
* [http://www. | * '''44000/440000-count dual-slope ADC''': [http://www.cyrustek.com.tw/product-1-44000.htm#ES51966 Cyrustek ES51966P] ([http://www.cyrustek.com.tw/spec/ES51966A.pdf 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''': [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(1KV FUSE) V20051010-10", but the correct "C" model indication is apparently added manually by UNI-T using a sharpie. | |||
** '''Other known variants''': [http://www.eevblog.com/forum/testgear/uni-trend-ut71c/?action=dlattach;attach=61486;image "71A(1KV FUSE) V20051010-8"], [http://www.eevblog.com/forum/testgear/hacking-the-uni-t-ut71c-%28wipneed-help%29/msg440238/#msg440238 "71A V20051010-8"], [http://www.eevblog.com/forum/testgear/uni-trend-ut71c/?action=dlattach;attach=43032;image "71A V20051010-6"], [http://cache.amobbs.com/bbs_upload782111/files_26/ourdev_532885.JPG "V20051010-4"] | |||
'''RS232 cable:''' | |||
* See [[Device cables#UNI-T_UT-D02]]. | |||
'''USB cable:''' | '''USB cable:''' | ||
| Line 26: | Line 34: | ||
<gallery> | <gallery> | ||
File:Ut71c pcb backside.jpg | File:Ut71c pcb front.jpg|<small>PCB, top</small> | ||
File:Ut71c pcb backside lower.jpg | File:Ut71c pcb backside.jpg|<small>PCB, bottom</small> | ||
File:Ut71c pcb backside upper.jpg | File:Ut71c pcb backside lower.jpg|<small>PCB, bottom low</small> | ||
File:Ut71c pcb backside upper.jpg|<small>PCB, bottom high</small> | |||
</gallery> | </gallery> | ||
'''RS232 cable:''' | |||
* See [[Device cables#UNI-T_UT-D02]]. | |||
'''USB cable:''' | '''USB cable:''' | ||
* See [[Device cables#UNI-T_UT-D04]]. | |||
See [[Device cables#UNI-T_UT-D04]]. | |||
== Protocol == | == Protocol == | ||
See [[ | See [[UNI-T UT71x series#Protocol]]. | ||
== Resources == | == Resources == | ||
| Line 46: | Line 55: | ||
* [http://uni-trend.com/manual2/UT71CDE%20Eng%20Manual.pdf Manual] | * [http://uni-trend.com/manual2/UT71CDE%20Eng%20Manual.pdf Manual] | ||
* [http://uni-trend.com/software/UT71C_D_E%20setup.exe Vendor software] | * [http://uni-trend.com/software/UT71C_D_E%20setup.exe Vendor software] | ||
* [http://www.eevblog.com/forum/testgear/uni-trend-ut71c/msg297042/#msg297042 eevblog.com: Uni-Trend UT71C] (teardown) | |||
* [http://www.amobbs.com/thread-3876959-1-1.html amobbs.com: UT71C] (teardown) | |||
* [http://www.amobbs.com/forum.php?mod=viewthread&tid=3876959&page=1&authorid=32351 amobbs.com: UT71C] (another teardown) | |||
[[Category:Device]] | [[Category:Device]] | ||
[[Category:Multimeter]] | [[Category:Multimeter]] | ||
[[Category: | [[Category:Supported]] | ||
Latest revision as of 22:26, 15 October 2015
 | |
| 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)