Difference between revisions of "MASTECH MS8250D"
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{{Infobox multimeter | {{Infobox multimeter | ||
| image = [[File: | | image = [[File:Mastech ms8250d mugshot.png|180px]] | ||
| name = MASTECH MS8250D | | name = MASTECH MS8250D | ||
| status = in progress | | status = in progress | ||
| Line 17: | Line 17: | ||
== Hardware == | == Hardware == | ||
* CP2102 USB to UART bridge controller | |||
* HY11P14 embedded 18-Bit Σ∆ADC 8-Bit RISC-like mixed signal microcontroller ([http://www.hycontek.com/wp-content/uploads/HY11P14_EN.pdf datasheet]) | |||
* DTA0660L multimeter chip | * DTA0660L multimeter chip | ||
* ATMLH538 EEPROM | * ATMLH538 EEPROM | ||
| Line 33: | Line 29: | ||
File:P1040378.jpg|<small>PCB, front</small> | File:P1040378.jpg|<small>PCB, front</small> | ||
File:P1040348.jpg|<small>Device, inside</small> | File:P1040348.jpg|<small>Device, inside</small> | ||
File:P1040388.jpg|<small>USB / | File:P1040388.jpg|<small>USB / serial interface</small> | ||
</gallery> | </gallery> | ||
| Line 39: | Line 35: | ||
The chip periodically sends 18-byte packets at 2400 baud, 8n1. There is no checksum or CRC in the packet. | 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. | The payload is composed of a 1-1 mapping of the LCD segments. | ||
Revision as of 22:38, 26 April 2018
 | |
| Status | in progress |
|---|---|
| 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.