Difference between revisions of "Tenma 72-7750"
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The '''Tenma 72-7750''' is a 6000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 | The '''Tenma 72-7750''' is a 6000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity. | ||
It is a rebadged [http://www.uni-trend.com/UT60G.html UNI-T UT60G]. | It is a rebadged [http://www.uni-trend.com/UT60G.html UNI-T UT60G]. | ||
See [[Tenma 72-7750/Info]] for more details (such as '''lsusb -v''' output) about the device. | |||
== Hardware == | == Hardware == | ||
* [[Multimeter ICs/Cyrustek ES519xx|Cyrustek ES51986A]] | * '''Multimeter IC''': [[Multimeter ICs/Cyrustek ES519xx|Cyrustek ES51986A]] (markings: "cyrustek.com.tw ES51986A 1216-GH91") | ||
* '''Low-power JFET dual operational amplifiers''': [http://www.st.com/web/en/catalog/sense_power/FM123/SC61/SS1378/PF65352 ST TL062C] (markings: "ST 062C eZ048") ([http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/CD00000486.pdf datasheet]) | |||
* '''Crystal''': 4MHz (markings: "3.999") | |||
* '''Fuses''': F500mA/250V, F10A/H250V (both are glass fuses) | |||
* '''Random PCB silkscreen markings''': "TRMS", "2008.12.10", "0604026" | |||
'''RS232 cable:''' | '''RS232 cable:''' | ||
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== Photos == | == Photos == | ||
'''Multimeter''': | |||
<gallery> | <gallery> | ||
File:Tenma 72-7750 PCB top.jpg | File:Tenma 72-7750 PCB top.jpg|<small>PCB, top</small> | ||
File:Tenma 72-7750 PCB bottom.jpg | File:Tenma 72-7750 PCB bottom.jpg|<small>PCB, bottom</small> | ||
</gallery> | </gallery> | ||
'''RS232 cable''': | |||
See [[Device cables#UNI-T_UT-D02]]. | |||
'''USB cable''': | |||
See [[Device cables#UNI-T_UT-D04]]. | |||
== Protocol == | == Protocol == | ||
See [[Multimeter_ICs# | See [[Multimeter_ICs#Cyrustek_ES51978]] for the DMM IC protocol. Depending on the cable, additional transport-specific decoding is needed, though. | ||
== Resources == | == Resources == | ||
Revision as of 20:54, 3 January 2014
 | |
| Status | in progress |
|---|---|
| Counts | 6000 |
| IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
| Connectivity | RS232 / USB |
| Measurements | voltage, current, resistance, capacitance, frequency, duty cycle, temperature, diode, continuity |
| Features | autorange, true-rms, data hold, relative, backlight |
| Website | mcmelectronics.com |
The Tenma 72-7750 is a 6000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.
It is a rebadged UNI-T UT60G.
See Tenma 72-7750/Info for more details (such as lsusb -v output) about the device.
Hardware
- Multimeter IC: Cyrustek ES51986A (markings: "cyrustek.com.tw ES51986A 1216-GH91")
- Low-power JFET dual operational amplifiers: ST TL062C (markings: "ST 062C eZ048") (datasheet)
- Crystal: 4MHz (markings: "3.999")
- Fuses: F500mA/250V, F10A/H250V (both are glass fuses)
- Random PCB silkscreen markings: "TRMS", "2008.12.10", "0604026"
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 Multimeter_ICs#Cyrustek_ES51978 for the DMM IC protocol. Depending on the cable, additional transport-specific decoding is needed, though.