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New EEVblog BM786 Multimeter

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Wytnucls:
Keysight 60,000 count meter manual:

Current can be measured at 440 mA continuously, and > 440 mA to 600 mA for 20
hours maximum.
To avoid blowing the multimeter’s 440 mA fuse, use the terminal only if you
are sure the current is less than 440 mA.

No warranty claim there.

wizard69:

--- Quote from: dcac on November 23, 2020, 03:04:29 pm ---Will a blown 400mA fuse in BM786 be covered by the warranty - if customer claims it was only measuring 590mA when it happened?

--- End quote ---

When has a blown fuse ever been covered  by a warranty?   

Brumby:

--- Quote from: wizard69 on November 26, 2020, 03:11:59 am ---
--- Quote from: dcac on November 23, 2020, 03:04:29 pm ---Will a blown 400mA fuse in BM786 be covered by the warranty - if customer claims it was only measuring 590mA when it happened?

--- End quote ---

When has a blown fuse ever been covered  by a warranty?   

--- End quote ---

Quite.

Besides - if the fuse blew, how would they know the current they were measuring?  Might have been a steady state 590mA and blew when a transient hit.

Fungus:

--- Quote from: dcac on November 23, 2020, 03:04:29 pm ---Will a blown 400mA fuse in BM786 be covered by the warranty - if customer claims it was only measuring 590mA when it happened?

--- End quote ---

No.

Kleinstein:

--- Quote from: Wytnucls on November 23, 2020, 03:16:40 pm ---Keysight 60,000 count meter manual:

Current can be measured at 440 mA continuously, and > 440 mA to 600 mA for 20
hours maximum.
To avoid blowing the multimeter’s 440 mA fuse, use the terminal only if you
are sure the current is less than 440 mA.

No warranty claim there.

--- End quote ---

A similar note should be included if the range is larger than the fuse rating.
With a warranty claim, the user could receive this missing bit of text from the instructions.  :-DD
Ideally the fuse values should be noted on the meter directly. I have seen this with some meters though there it was the usual way around, like 400 mA fuse for a 200 mA range.
One could argue to change the nominal range to the fuse rating and treat the extra range only as "over-range" for short time use. Due to thermal effect the accuracy is often anyway relatively poor at the upper end. So the specs for the reduced range could get better.

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