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| New multimeters from Brymen |
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| RAPo:
I don't see any advantage to the Brymens I already have (BM257s/BM789/BM869s). |
| Fungus:
--- Quote from: RAPo on June 04, 2023, 12:15:48 pm ---I don't see any advantage to the Brymens I already have (BM257s/BM789/BM869s). --- End quote --- The "industrial" meters are smaller and have a very satisfying feel. You should try one. They're also a lot tougher and have recessed screens so you can throw them in toolboxes. Less feature overload on the dial, too. |
| floobydust:
--- Quote from: EEVblog on June 04, 2023, 10:08:19 am ---Kane sent me an EEVblog branded 555 meter, a variation on the 121GW, and they wanted to know if I was keen to sell it. But I didn't understand why they added motor measurement on such an instrument, didn't make much sense :-// --- End quote --- Multimeter OEM's and product line managers have little to no experience in the environments they are targeting. So there are features of no real use that Company A came up with and everybody just copies it, adds it in I think. I've worked with VFD's to 100HP on 480VAC so DC bus is around 850VDC. Connecting a multimeter to that (motor output) being commutated at 6-12kHz PWM carrier freq. is a mind blowing amount of common-mode noise that will cause either erroneous readings, crashing etc. which requires added EMI shielding and added cost and bulk. It's an 850Vpp square-wave and a multimeter will tell you nothing of value doing that risky measurement. It can't help you troubleshoot a VFD or motor. In plant environments there is always moisture, dirt, CNC coolant glycol, coal dust etc. so you need two things - Low Z for voltage measurements and Ohms test current higher than a flea fart. Brymen's designs have dropped down to around 0.3mA which is no good in these environments. It should be at least the usual 1mA or higher i.e. testing a 1,200V 150A IGBT on Ohms to see if it is damaged, you can get misleading readings. --- Quote from: Fungus on June 04, 2023, 10:52:01 am --- --- Quote from: floobydust on June 03, 2023, 09:16:28 pm ---It's missing LowZ on V so kinda crappy for electrician's use. Would not buy a multimeter without LowZ V in a plant or industrial environment, been there done that. --- End quote --- --- Quote from: Fungus on June 04, 2023, 10:52:01 am ---FWIW: The 2807 model has "Single-pole Contact EF-Detection for Precise Indications of Live Conductors" --- End quote --- --- End quote --- This is non-contacting electric-field detection, which is different from Low Z voltage measurements. |
| mwb1100:
--- Quote from: Fungus on June 04, 2023, 11:03:57 am ---This is slightly worrying: Looks like battery life will only be about 150 hours. Surely they could have made it work with 3xAAA. LDOs only cost a few cents. --- End quote --- This is exactly the same as the BM235. Maybe Brymen hasn't been getting much negative feedback on the BM235's battery life? |
| Brumby:
--- Quote from: floobydust on June 04, 2023, 04:10:58 am ---I don't mean to laugh but can someone straighten the banana jacks please :-DD pic from Brymen website. --- End quote --- Yeah ... it is a bit triggering........ Is this better? |
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