Products > Test Equipment
Brymen BM786 - Case cracking
Mpegger:
Just picked up my BM786 and noticed that there are 2 cracks on the plastic case portion about 1/6 down from the top of the clear screen, which is starting to encrouch onto the clear screen itself on the left side. This meter has been pretty much babied, never dropped, and if it wasn't for my old eyes, I probably would have noticed these craks earlier. However, the crack starting to form on the clear screen itself are definetely new, as the crack causes the light going through it to have a prismatic effect and is very noticeable, even with poor eyesight, and that was not there last week when I last picked up the meter. Looks like plastic is failing because of a stress or a mounting point for a internal screw? Plastic getting old? The meter is about to be 3 years old as of purchase next month.
J-R:
I checked my BM789 and I can see four potential weak points in the plastic on each side, one of which corresponds to the cracks in your photo. Interesting issue. Even if dropped, I'd expect it to not do that. Dave could probably find a replacement top half and ship it to you or replace the DMM. This would be an easy fix if you had a donor DMM...
joeqsmith:
Looking at the ones I have, there does not appear to be any signs of a clearance issue or cracks. The cracks you show appear to align with the first two divots. I attempted to break the meter's upper shell in my hands without the lower half attached. Should be very weak comparatively speaking.
I wonder if something went wrong when the lens was assembled into the upper shell. That our something was binding when the meter was assembled and someone went ahead and cranked down the screws.
Antrus:
Bm789 - the same, it is 3 years old. The reduction in cost of materials is obvious.
AVGresponding:
It could be the combination of the walls being a bit too thin near stress risers, with repeated heat cycling
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