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Date: | 22 Feb 1997 06:42:45 -0700 |
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From: Knowles, Ed on Sat, Feb 22, 1997 6:42 AM
Subject: Soldering
To: TechNet
During a recent audit, it was suggested that we verify the temperature
of our soldering irons periodically. We have always verified the idle
and set temperatures of new models (±5°C idle and ±15°C set temps.) to
verify they were capable of meeting our requirements, and have relied
on operator training to recognize any abnormalities in production
soldering irons. We feel that verification of irons using a
calibrated instrument would be time consuming and not value added. It
is our contention that cold or overheated solder is inspectable and
that trained operators would realize if their iron was running too hot
or cold by the behavior of the solder. We have not had any history of
bad irons causing a failure. Besides, we tried verifying soldering
irons some years ago, but gave it up because they kept failing due to
oxidation. The tester basically had to get the iron in new condition
to get a test to pass. I would appreciate any comments for or against
this practice. The auditor feels it is absolutely necessary for
process control.
PS: We do verify resistance to ground and voltage of the iron tip
every 2 weeks.
Thanks.
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