Difference between revisions of "Brymen BM857"
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[[File: | {{Infobox multimeter | ||
| image = [[File:Bm_857_mugshot_500000.png|180px]] | |||
| name = Brymen BM857 | |||
| status = supported | |||
| source_code_dir = brymen-dmm | |||
| counts = 50000, 500000(DCV), 999999(Hz) | |||
| categories = CAT III (1000V) / CAT IV (600V) | |||
| connectivity = RS232 | |||
| measurements = voltage, frequency, diode, resistance, continuity, capacitance, current | |||
| features = autorange, data hold, crest, backlight, true-rms, dBmW<sup>1</sup>, %4-20mA | |||
| website = [http://brymen.com/product-html/cata850a/Bm850as.htm brymen.com] | |||
}} | |||
The | The '''Brymen BM857''' is a 50000 counts (500000 DC), CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 connectivity. | ||
<sup>1</sup>: The reference impedance is selectable from 4Ω to 1200Ω. It is not limited to reference impedance of 600Ω. | |||
== Hardware == | == Hardware == | ||
'''Multimeter:''' | '''Multimeter:''' | ||
* TODO | * '''Multimeter IC''': TBD | ||
* '''Precision +2.5V Voltage reference''': [http://www.analog.com/en/special-linear-functions/voltage-references/ref43/products/product.html Analog Devices REF43] | |||
* '''True RMS-to-DC converter''': [http://www.analog.com/en/special-linear-functions/rms-to-dc-converters/ad737/products/product.html Analog Devices AD737] | |||
* '''EEPROM(?)''': Chip marked S24C0. | |||
* '''Unidentified''': Several 062-JRC chips. These appear to be JFET opamps. | |||
* '''Unidentified''': Two QFP64 chips. | |||
* TODO | |||
'''Cable:''' | '''Cable:''' | ||
* TODO | * TODO | ||
See [[User_talk:Mrnuke#BM857_PC_Interface_cable]] | |||
== Photos == | == Photos == | ||
Line 16: | Line 35: | ||
<gallery> | <gallery> | ||
File:Bm857_box_left.png|<small>Box</small> | |||
File:Bm_857_mugshot_500000.png|<small>Mughsot | |||
File:Bm857_back.jpg|<small>Device, back</small> | |||
File:Bm857_package_contents.jpg|<small>Package contents</small> | |||
File:Bm857_cable_clips.jpg|<small>Probe cable storage clips</small> | |||
File:Bm857_lcd_backlit.jpg|<small>LCD Backlight</small> | |||
File:Bm857_front_noholster.png|<small>Holster removed, front</small> | |||
File:Bm857_back_noholster.jpg|<small>Holster removed, back</small> | |||
File:Bm857_opened.jpg|<small>Case opened</small> | |||
File:Bm857 inside backside.jpg|<small>Rear cover</small> | |||
File:Bm857_cover_front.jpg|<small>Front cover</small> | |||
File:Bm857_cover_back.jpg|<small>Rear cover, PCB removed</small> | |||
File:Bm857_upperpcb_top.jpg|<small>Upper PCB, top</small> | |||
File:Bm857_upperpcb_bottom.jpg|<small>Upper PCB, bottom</small> | |||
File:Bm857_lowerpcb_top.jpg|<small>Main PCB, top</small> | |||
File:Bm857_lowerpcb_bottom.jpg|<small>Main PCB, bottom</small> | |||
File:Bm857_hv_slots.jpg|<small>High voltage isolation slots.</small> | |||
File:Bm857_hv_walls.jpg|<small>High voltage isolation walls, designed to fit in the isolation slots.</small> | |||
File:Bm857_input_circuit.jpg|<small>Input circuit near the V jack</small> | |||
File:Bm857_mcu+lcdc.jpg|<small>Microcontroller (right), and LCD controller (left)</small> | |||
File:Bm857_mcu+lcdc_2.jpg|<small>Microcontroller (right), and LCD controller (left)</small> | |||
File:Bm857_lcdc.jpg|<small>LCD controller and connector</small> | |||
File:Bm857_ICs.jpg|<small>ICs on the main PCB</small> | |||
File:Bm857_ICs_2.jpg|<small>More ICs</small> | |||
</gallery> | </gallery> | ||
'''Cable:''' | '''Cable:''' | ||
This can use either the BC-85X or the BC-85X-1 cables. See [[Device_cables#Brymen_BC-85X(-1)]]. | |||
Currently, mrnuke is working on an improvised USB-to-infrared converter cable. See [[User_talk:Mrnuke#BM857_PC_interface_cable]] for more details. | |||
<gallery> | |||
File:Brymen_br85x_dmm_hookup_all.jpg|<small>Cable hookup</small> | |||
File:Brymen_br85x_dmm_hookup_side.jpg|<small>Cable hookup, detail</small> | |||
File:Brymen_br85x_dmm_hookup_angle.jpg|<small>Cable hookup, closeup</small> | |||
File:Brymen_br85x_dmm_hookup_top.jpg|<small>Cable hookup, top detail</small> | |||
</gallery> | |||
== Protocol == | == Protocol == | ||
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[[Category:Device]] | [[Category:Device]] | ||
[[Category:Multimeter]] | [[Category:Multimeter]] | ||
[[Category:Supported]] |
Revision as of 18:51, 2 February 2013
Status | supported |
---|---|
Source code | brymen-dmm |
Counts | 50000, 500000(DCV), 999999(Hz) |
IEC 61010-1 | CAT III (1000V) / CAT IV (600V) |
Connectivity | RS232 |
Measurements | voltage, frequency, diode, resistance, continuity, capacitance, current |
Features | autorange, data hold, crest, backlight, true-rms, dBmW1, %4-20mA |
Website | brymen.com |
The Brymen BM857 is a 50000 counts (500000 DC), CAT III (1000V) / CAT IV (600V) handheld digital multimeter with RS232 connectivity.
1: The reference impedance is selectable from 4Ω to 1200Ω. It is not limited to reference impedance of 600Ω.
Hardware
Multimeter:
- Multimeter IC: TBD
- Precision +2.5V Voltage reference: Analog Devices REF43
- True RMS-to-DC converter: Analog Devices AD737
- EEPROM(?): Chip marked S24C0.
- Unidentified: Several 062-JRC chips. These appear to be JFET opamps.
- Unidentified: Two QFP64 chips.
- TODO
Cable:
- TODO
See User_talk:Mrnuke#BM857_PC_Interface_cable
Photos
Multimeter:
Cable:
This can use either the BC-85X or the BC-85X-1 cables. See Device_cables#Brymen_BC-85X(-1).
Currently, mrnuke is working on an improvised USB-to-infrared converter cable. See User_talk:Mrnuke#BM857_PC_interface_cable for more details.
Protocol
TODO
Resources
TODO