ES51932_log.zip (1.6 kB - downloaded 46 times.)
ES51932_log.zipJust decided to replace my 40 year old expensive non-auto ranging DMM with 2000 counts for an inexpensive 22000 count meter:
https://www.aliexpress.com/item/4000178957414.htmlSo in conclusion:
- 22000 counts
- Nice big screen
- Rugged pretty sturdy case
- Temperature, in device and with external thermocouple (included in package).
- Manual HOLD
- Chipset documentation online
- Trimmers on the mainboard, so you might be able to calibrate the device yourself.
(please share if you know how TODO this) - Cheap-ass fuses as Dave would say and minimal clearances so keep well below the suggested maximum voltages.
- Only low voltage stuff with RS232 connected. Even though it seems optically isolated.
- DMM Chip-set: ES51932
- UART: CP2102
- Serial Communication protocol: 19200 baud, 7 data-bits, 1 stop-bit, odd parity
Data packet out: 14 Bytes = [ range, digit[4,3,2,1,0], function, status, option[1,2,3,4], CR , LF ]
In the attachment is a little Perl serial decoder script as a proof of concept, it expects device at /dev/ttyUSB0 but you can easily change that.
Example session:
./ES51932_log.pl
...
00060e-4 V DC auto
-22112e-5 V DC
OL V DC
OL Ω auto
00061e-12 F auto
00000e-2 Hz auto
00207e-1 °C
00000e-8 A DC auto
All in all not a bad investment for 50 euro.