Products > Test Equipment
New EEVblog BM786 Multimeter
2N3055:
--- Quote from: rsjsouza on November 19, 2020, 03:29:06 pm ---
--- Quote from: Wytnucls on November 19, 2020, 10:42:32 am ---It might happen more often than you think, with a 400mA fuse in a 60,000 count meter.
--- End quote ---
Yes. Despite the price of HRC cartridges, I saw myself in the situation of occasional sudden spikes in current due to failures or shorts. All low-voltage electronics, but definitely enough to kill a 44/100.
--- End quote ---
As I said, it highly depends on what you do.
MTX3293 has only one current socket and is designed to autorange from 1mA to 100A (20a constant) range at all times. It will also switch to current mode automatically if you plug cable in current socket. So to blow a fuse, you have to go over 20 for some time, or over 100A for a short time...
I quite like it...
Wytnucls:
--- Quote from: Fungus on November 19, 2020, 03:27:14 pm ---
--- Quote from: Wytnucls on November 19, 2020, 10:42:32 am ---It might happen more often than you think, with a 400mA fuse in a 60,000 count meter.
--- End quote ---
What's the relationship between the two?
If anything, 60,000 counts should make it less likely to blow a fuse because you can work more in the amps range.
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The range is 600 mA, protected by a 400 mA fuse. Running 600mA for too long will blow the fuse eventually.
Notice that at 135% of its rated current a North American fuse must open
within one hour while an IEC fuse must be able to carry 150% of its rated
current for at least one hour Cooper Bussmann
bitseeker:
I guess they assume you wouldn't be measuring at full scale for extended periods of time. Nevertheless, an interesting mismatch of values.
AVGresponding:
--- Quote from: bitseeker on November 22, 2020, 10:19:18 pm ---I guess they assume you wouldn't be measuring at full scale for extended periods of time. Nevertheless, an interesting mismatch of values.
--- End quote ---
Especially when you consider that 630mA is a standard fuse value.
EEVblog:
--- Quote from: bitseeker on November 22, 2020, 10:19:18 pm ---I guess they assume you wouldn't be measuring at full scale for extended periods of time. Nevertheless, an interesting mismatch of values.
--- End quote ---
Very common.
The Fluke 70 and 80 series are both 6000 count and use a 440mA fuse.
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