MASTECH MS8250D
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 | |
| Status | supported |
|---|---|
| Source code | serial-dmm |
| Counts | 6600 |
| IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
| Connectivity | USB/serial |
| Measurements | voltage, current, resistance, capacitance, frequency, duty cycle, diode, continuity |
| Features | autorange, true-rms, data hold, min/max, relative, bargraph, backlight, ncv |
| Website | mastech-group.com |
The MASTECH MS8250D is a 6600 counts, CAT III (1000V) / CAT IV (600V) handheld digital multimeter with USB connectivity.
See MASTECH MS8250D/Info for more details (such as lsusb -v output) about the device.
Hardware
- CP2102 USB to UART bridge controller
- HY11P14 embedded 18-Bit Σ∆ADC 8-Bit RISC-like mixed signal microcontroller (datasheet)
- DTA0660L multimeter chip
- ATMLH538 EEPROM
Photos
Device, front
PCB, front
Device, inside
USB / serial interface
Protocol
The chip periodically sends 18-byte packets at 2400 baud, 8n1. There is no checksum or CRC in the packet.
The payload is composed of a 1-1 mapping of the LCD segments.