Tenma 72-9380A¶


Status	supported
Source code	serial-dmm
Counts	40000/4000
IEC 61010-1	CAT III (1000V) / CAT IV (600V)
Connectivity	RS232 / USB
Measurements	voltage, current, power, resistance, capacitance, frequency, temperature, duty cycle, diode, continuity
Features	autorange, true-rms, data hold, relative, backlight
Website	mcmelectronics.com

The Tenma 72-9380A is a 40000/4000 count CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 or USB connectivity.

It is a rebadged UNI-T UT71-E.

See UNI-T UT71x series for information common to all devices in this series.

Hardware¶

Multimeter:

LSD0007 (possibly TI MSP430 MCU?)
TI MSP430FE425 microcontroller
Cyrustek ES51966 DMM chip
Holtek HT1621 LCD driver
PCB markings: The silkscreen reads "71E (1KV FUSE) V20051120-9", but an additional "E" model indication is apparently added manually by UNI-T using a sticker.

RS232 cable: