Difference between revisions of "MASTECH MS8250D"

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{{Infobox multimeter
{{Infobox multimeter
| image          = [[File:P1040343.jpg |100px]]
| image          = [[File:Mastech ms8250d mugshot.png|180px]]
| name            = MASTECH MS8250D
| name            = MASTECH MS8250D
| status          = in progress
| status          = in progress
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== Hardware ==
== Hardware ==
'''Multimeter''':
* 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]


* 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


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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 / Serial interface</small>
File:P1040388.jpg|<small>USB / serial interface</small>
</gallery>
</gallery>


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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

MASTECH MS8250D
Mastech ms8250d mugshot.png
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

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.

Resources