Difference between revisions of "Brymen BM857"

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[[File:Bm_857_mugshot_500000.png|thumb|right|Brymen BM857]]
{{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 [http://brymen.com/product-html/cata850a/Bm850as.htm Brymen BM857] is a 50000 counts (500000 DC), CAT IV handheld digital multimeter with infrared connectivity.
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 ==
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<gallery>
<gallery>
File:Bm_857_mugshot_500000.png|<small>Mugshot</small>
File:Bm857_box_left.png|<small>Box</small>
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_package_contents.jpg|<small>Package contents</small>
File:Bm857_cable_clips.jpg|<small>Probe cable storage clips</small>
File:Bm857_cable_clips.jpg|<small>Probe cable storage clips</small>
File:Bm857_front_noholster.png|<small>Front, holster removed</small>
File:Bm857_lcd_backlit.jpg|<small>LCD Backlight</small>
File:Bm857_back_noholster.jpg|<small>Front, holster removed</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_opened.jpg|<small>Case opened</small>
File:Bm857 inside backside.jpg|<small>Rear case and components</small>
File:Bm857 inside backside.jpg|<small>Rear cover</small>
File:Bm857_cover_front.jpg|<small>Front cover</small>
File:Bm857_cover_front.jpg|<small>Front cover</small>
File:Bm857_cover_back.jpg|<small>Back 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_top.jpg|<small>Upper PCB, top</small>
File:Bm857_upperpcb_bottom.jpg|<small>Upper PCB, bottom</small>
File:Bm857_upperpcb_bottom.jpg|<small>Upper PCB, bottom</small>
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'''Cable:'''
'''Cable:'''


We don't have a cable (BC-85Xa) for this device. Currently, mrnuke is working on an improvised USB-to-infrared converter for development purposes. If you have a BC-85Xa you'd like to donate, contact mrnuke on #sigrok.
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:Planned]]
[[Category:Supported]]

Revision as of 17:51, 2 February 2013

Brymen BM857
Bm 857 mugshot 500000.png
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