Products > Test Equipment
Brymen BM789
joeqsmith:
Showing the Radio Shack clamp attached to the BM789. I bought a Kline tools PN 69409 line splitter for a debunk video I made. I am using the 10X side of the splitter.
First I tried it with a simple light bulb. The Kill-A-Watt EZ measures 0.48A. This is a standard filament bulb so PF=1. The BM789 measures 2.172mA. The probe is 1mA = 2A. So 2.172*2/10X = 434.4mA
Next I tried it with my heat gun. Again, it's a resistive load so the power factor is one. The Kill-A-Watt EZ measures 3.72 Amps. The BM789 measures 17.447mA. Again 17.447 * 2/10 = 3.4894A.
I'm not sure how accurate the Kill A Watt, meter or probe are. The probe is +/-0.6A at 50/60Hz for 1-2A. They show no data below 1A. But 600mA of error on a 1A signal seems suspect. We are doing much better than that.
+/-(4% + 1A) at 50/60Hz for 2-300A. At the 3.5A, again we are much tighter.
J-R:
--- Quote from: Astray on June 23, 2024, 01:02:03 pm ---Curious, does anyone know if there's an accessory that would allow me to use a BM786 or BM789 similar to a clamping multimeter?
I understand there's an Electrical Field detection feature already available but it would be nice if there was a clamp I could attach to the multimeter's inputs to have it estimate the current in a wire, instead of buying a whole new multimeter just for the clamping function.
--- End quote ---
To start, you could consider various accessory clamps from Fluke and AEMC (Chauvin Arnoux), such as the Fluke Y8100 and 80i series, and AEMC SL2xx series (and Fluke and AEMC in general).
Also, there is some overlap in this area between DMMs and oscilloscopes. Converting from BNC to banana jacks (or vice versa) is trivial.
However, despite having the PDI CA60 and some others, for portable DMM use I can't say it's worth it. For the money and size/weight of the current clamp accessory, you could simply buy an entire clamp DMM and carry that in addition (or instead). For the compact form factor, there is the famous Uni-T UT-210 series, the Brymen 03x series and many others. Which to choose will come down to features and range/accuracy requirements.
TomKatt:
--- Quote from: J-R on June 24, 2024, 12:27:41 am ---However, despite having the PDI CA60 and some others, for portable DMM use I can't say it's worth it. For the money and size/weight of the current clamp accessory, you could simply buy an entire clamp DMM and carry that in addition (or instead). For the compact form factor, there is the famous Uni-T UT-210 series, the Brymen 03x series and many others. Which to choose will come down to features and range/accuracy requirements.
--- End quote ---
That’s an excellent point - while these products do exist, it’s more cost efficient to just purchase a clamp meter. Plus, they eliminate any conversion calculations by displaying the actual current.
Astray:
Thank you guys for the info about the clamp!
Also I made a discovery concerning the BM786 and BM789 and made another post about it that might be of interest to some.
sonpul:
Greetings to all. Question.
What is this pictogram (((D))) and why is it there?
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