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I just soldered new battery wires in my 3435a. The thru-hole is large and I didn't have the small plastic pieces: they would have prevented the new wire to "fall through" the hole while soldering.
What purpose does the little plastic washer serve?
This device doesn't have a fan, or ventilation openings. So while it might not be dust-proof in an IP code sense, very little dust gets in. Gold plated or flashed PCBs will look pristine for many decades, maybe even centuries, when stored dry.
as there's still no answer: This washer ensures that the wire isolation has enough distance to the solder joint during soldering.
Quote from: dom0 on August 06, 2015, 07:48:54 amThis device doesn't have a fan, or ventilation openings. So while it might not be dust-proof in an IP code sense, very little dust gets in. Gold plated or flashed PCBs will look pristine for many decades, maybe even centuries, when stored dry.Right - the case is totally enclosed. One of these meters came to me smelling like nicotine and was very nasty on the outside, but inside it was clean. Looked just like it came off the factory floor.