Products > Test Equipment
New EEVblog BM786 Multimeter
bc888:
BTW, can anyone direct me where is the BM786 manual download? It's not here now, https://www.eevblog.com/files/BM789-Manual-Original-Final.pdf, and I didn't find it via Eevblog Wiki or search. Didn't find it on Brymens site either:
Nevermind, rooted around and got it here: https://www.eevblog.com/files/BM786-Manual-Original-Jan2021.pdf
schwaggins:
The continuity beep is very responsive on mine i haven't noticed any lag/latching problems at all, i am using different leads with mine maybe its that.
NCV is incredibly sensitive on this meter i was able to detect live wiring in the wall quite easily
schwaggins:
" Continuity beep is not the fastest. Wish it was."
You are probably referring to the Beeplit Diode test, Beeplit Continuity function is the one on the Ohms range which is instantaenous
Frank987:
There is a problem with the 400 mA Fuse: The BM786 manual says a SIBA Fuse 7017240;0.4A/1000V is used for the 600 mA range. In the SIBA datasheet https://download.siba.de/pdf/artikel/SIBA-GSS-7017240.pdf you find that the 400 mA fuse blows typical after 0.1 s at 1,5 * 400 mA = 600 mA. The I²t value of the fuse is 0.07 A²s, giving about 0.2 s at 600 mA. So something must be wrong as it s not possible to do measurements in less than 0.2 s. Either the manual is wrong or the 600 mA current rating of the meter or the meter is supplied with the wrong fuse, should be SIBA 7017240.0,63 with 630 mA.
2N3055:
--- Quote from: Frank987 on February 14, 2021, 10:39:01 am ---There is a problem with the 400 mA Fuse: The BM786 manual says a SIBA Fuse 7017240;0.4A/1000V is used for the 600 mA range. In the SIBA datasheet https://download.siba.de/pdf/artikel/SIBA-GSS-7017240.pdf you find that the 400 mA fuse blows typical after 0.1 s at 1,5 * 400 mA = 600 mA. The I²t value of the fuse is 0.07 A²s, giving about 0.2 s at 600 mA. So something must be wrong as it s not possible to do measurements in less than 0.2 s. Either the manual is wrong or the 600 mA current rating of the meter or the meter is supplied with the wrong fuse, should be SIBA 7017240.0,63 with 630 mA.
--- End quote ---
If you look at that diagram, that dotted line on the left is not the fuse curve. Fuse reaction curves are those two short ones on the right (marked with white and black triangles).
Fuse will blow in 60 msec at 4X of nominal current. At 2,75xIn (nominal current) it will not even blow...
Regards,
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version