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| Siglent SDM3045X mA current measurement - weird behaviour |
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| tautech:
SDM3065X Rear panel fuse: 5x20 glass LF (Littlefuse) marking: T10AL250VP Internal PCB fuse: 5x20 HRC LF (Littlefuse) marking: T12A250VP |
| rf-loop:
--- Quote from: tautech on November 12, 2018, 10:29:00 pm ---SDM3065X Rear panel fuse: 5x20 glass LF (Littlefuse) marking: 10AL250VP As per datasheet spec this should be FB fuse. Internal PCB fuse: Later when more time available............ but already we know it's ceramic. --- End quote --- "10AL250VP" Is it possible there is installed wrong fuses? (Need ask because China and fuses - I do not wonder anything. I have seen there with my own eyes so much...) Where is speed identifier? It need be before current. Here is Littelfuse 5x20 cap marking Littelfuse product catalog and design guide, small fuse "bible" |
| rf-loop:
--- Quote from: ahope on November 12, 2018, 07:31:07 pm ---A little background on the blown fuse. The instrument was almost unused, bought new a couple of montgs before. I was probing inside a chassis and accidentally touched the 220v and poof! it blew. quite a bang actually, those fuses dont go quietly, The internal fuse is a 12A slow ceramic, the rear fuse a fast 10A. makes absolutley no sense that the internal should blow before the rear fuse. This is the one and only fuse I have had to replace on this instrument. --- End quote --- Do you still have this original rear panel 10A (not blown) fuse what was there installed at this time when internal 12A fuse blow. |
| ahope:
--- Quote from: rf-loop on November 13, 2018, 06:33:56 am --- --- Quote from: ahope on November 12, 2018, 07:31:07 pm --- --- End quote --- Do you still have this original rear panel 10A (not blown) fuse what was there installed at this time when internal 12A fuse blow. --- End quote --- Yes. I have checked it and it is indeed a 10A fast glass fuse |
| tautech:
--- Quote from: rf-loop on November 13, 2018, 05:58:29 am --- --- Quote from: tautech on November 12, 2018, 10:29:00 pm ---SDM3065X Rear panel fuse: 5x20 glass LF (Littlefuse) marking: 10AL250VP As per datasheet spec this should be FB fuse. Internal PCB fuse: Later when more time available............ but already we know it's ceramic. --- End quote --- "10AL250VP" Is it possible there is installed wrong fuses? (Need ask because China and fuses - I do not wonder anything. I have seen there with my own eyes so much...) Where is speed identifier? It need be before current. Here is Littelfuse 5x20 cap marking Littelfuse product catalog and design guide, small fuse "bible" --- End quote --- Rear panel fuse # corrected, it does indeed have T but maybe F or FF would be best. |
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