Difference between revisions of "Tenma 72-7730"
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| image = [[File:Tenma 72-7730.png|180px]] | | image = [[File:Tenma 72-7730.png|180px]] | ||
| name = Tenma 72-7730 | | name = Tenma 72-7730 | ||
| status = | | status = supported | ||
| source_code_dir = | | source_code_dir = serial-dmm | ||
| counts = 20000 | | counts = 20000/2000 | ||
| categories = CAT III (1000V) / CAT IV (600V) | | categories = CAT III (1000V) / CAT IV (600V) | ||
| connectivity = [[Device_cables#UNI-T_UT-D04|USB]] | | connectivity = [[Device_cables#UNI-T_UT-D02|RS232]] / [[Device_cables#UNI-T_UT-D04|USB]] | ||
| measurements = voltage, current, resistance, capacitance, frequency, temperature, duty cycle, diode, continuity | | measurements = voltage, current, resistance, capacitance, frequency, temperature, duty cycle, diode, continuity | ||
| features = autorange, true-rms, data hold, relative, backlight | | features = autorange, true-rms, data hold, relative, backlight | ||
| Line 12: | Line 12: | ||
}} | }} | ||
The '''Tenma 72-7730''' is a 20000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with USB connectivity. | The '''Tenma 72-7730''' is a 20000/2000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity. | ||
It is a rebadged [[UNI-T UT71x series|UT71-B]]. | It is a rebadged [[UNI-T UT71x series|UNI-T UT71-B]]. | ||
See [[UNI-T UT71x series]] for information common to all devices in this series. | |||
== Hardware == | == Hardware == | ||
'''Multimeter''': | |||
* '''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''': [http://www.ti.com/product/msp430f149 Texas Instruments MSP430F149] (markings "TI 14AH00W G4 LSD0007 REV S") ([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]) | |||
* '''PCB markings''': The silkscreen reads "71A V20051010-8", but the correct "B" model indication is apparently added manually by UNI-T using a a sharpie and a sticker. | |||
'''RS232 cable:''' | |||
* See [[Device cables#UNI-T_UT-D02]]. | |||
'''USB cable:''' | '''USB cable:''' | ||
| Line 22: | Line 33: | ||
== Photos == | == Photos == | ||
'''Multimeter''': | |||
<gallery> | <gallery> | ||
File:Tenma 72-7730 PCB front.jpg | File:Tenma 72-7730 PCB front.jpg|<small>PCB, top</small> | ||
File:Tenma 72-7730 PCB | File:Tenma 72-7730 PCB back.jpg|<small>PCB, bottom</small> | ||
File:Tenma 72-7730 PCB | File:Tenma 72-7730 PCB MCU.jpg|<small>TI MSP430F149</small> | ||
</gallery> | </gallery> | ||
'''RS232 cable:''' | |||
See [[Device cables#UNI-T_UT-D02]]. | |||
'''USB cable:''' | |||
See [[Device cables#UNI-T_UT-D04]]. | |||
== Protocol == | == Protocol == | ||
See [[UNI-T UT71x series#Protocol]]. | |||
== Resources == | == Resources == | ||
| Line 41: | Line 62: | ||
[[Category:Device]] | [[Category:Device]] | ||
[[Category:Multimeter]] | [[Category:Multimeter]] | ||
[[Category: | [[Category:Supported]] | ||
Latest revision as of 16:50, 17 October 2015
 | |
| Status | supported |
|---|---|
| Source code | serial-dmm |
| Counts | 20000/2000 |
| IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
| Connectivity | RS232 / USB |
| Measurements | voltage, current, resistance, capacitance, frequency, temperature, duty cycle, diode, continuity |
| Features | autorange, true-rms, data hold, relative, backlight |
| Website | mcmelectronics.com |
The Tenma 72-7730 is a 20000/2000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
It is a rebadged UNI-T UT71-B.
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 14AH00W G4 LSD0007 REV S") (datasheet)
- 128 (32 x 4) pattern multi-function LCD driver': Holtek HT1621B (datasheet)
- PCB markings: The silkscreen reads "71A V20051010-8", but the correct "B" model indication is apparently added manually by UNI-T using a a sharpie and a sticker.
RS232 cable:
USB cable:
Photos
Multimeter:
PCB, top
PCB, bottom
TI MSP430F149
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.