Products > Test Equipment
Siglent SDM3045X mA current measurement - weird behaviour
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tautech:

--- Quote from: ahope on November 13, 2018, 07:14:56 am ---
--- 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

--- End quote ---
Can you please get the codes for the internal fuse ? .........I'll check my 3065X

See reply #45
rf-loop:

--- Quote from: ahope on November 13, 2018, 07:14:56 am ---
--- 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

--- End quote ---

You have checked. How?
Do you  believe it is fast or do it have marking what it IS fast and how fast.
If there is mark for speed class, what it is. (ref Tautech next msgs)




rf-loop:

--- Quote from: tautech on November 13, 2018, 07:35:58 am ---
--- 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.

--- End quote ---

Rear panel fuse really have speed class marking T ?

Oh what a total mess.

Normally T = Slow Acting (Trage)

Not TT, not T, not M.... Only acceptable is F or FF and really from trusted manufacturer.
Qw3rtzuiop:
At my SDM3045X the internal Fuse is a ceramic LF T12AH250VP. The rear one is marked LF T10L250V.
HKJ:
I have just published a review of this meter: https://lygte-info.dk/review/DMMSiglent%20SDM3045X%20UK.html
Including a tear down.
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