Brymen BM869
Jump to navigation
Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
 | |
| Status | supported |
|---|---|
| Source code | brymen-bm86x |
| Counts | 50000, 500000(DCV), 99999(Hz) |
| IEC 61010-1 | CAT IV (1000V) |
| Connectivity | Infrared (USB) |
| Measurements | voltage, current, frequency, duty cycle, resistance, continuity, conductance, diode, capacitance, temperature |
| Features | autorange, data hold, min/max/avg, crest, backlight, true-rms, dBm, %4-20mA, VFD |
| Website | brymen.com |
The Brymen BM869 is a 50000 counts (500000 DC), CAT IV (1000V) dual display handheld digital multimeter with USB connectivity.
Hardware
Multimeter:
- Multimeter IC: BTC AD-85-4 (hidden under metal shielding)
- Precision +2.5V Voltage reference: Analog Devices REF43
- True RMS-to-DC converter: Analog Devices AD636
- 4 Kb EEPROM: Seiko S-24CS04A.
- J-FET input op-amp: Three NMJ062 chips marked 062-JRC.
- Rail-to-Rail op-amp: Two Microchip MCP6021 probably dedicated to the two temperature sensors.
Cable: The Brymen BC-86X cable is designed to be used with the Brymen BM867 and BM869. See Device_cables#Brymen_BU-86X.
Photos
Multimeter:
Unboxing
Mughsot
Device back
Holster removed, front
Holster removed, back
Battery compartment
Opened, PCB top
Opened, PCB bottom
Separated PCB
PCB details
LCD segments
LCD Backlight
Cable:
Cable hookup
Cable hookup, closeup
Protocol
It is described by Brymen in a document named 500000count-professional-dual-display-DMMs-protocol.pdf which is part of their BM860-Bs86x windows software distribution.