In past lives I've done exactly what Ron is suggesting, plus we had
a "golden" unit for the start of production shift testing. We tested the
"golden" unit and it should pass, the test jig was then tested and all of
the audible and visual indicators were examined to insure that they all were
operating. The status of both units and tests was inserted into the test log
and initialed by the operator. Same guy that had to indicate the serial
numbers and date of the tests for each of the products.
We have found instances where one or more of the indicators failed
to show a fault. A lamp was burned out etc.
Gary
-----Original Message-----
From: Ron Pickard [mailto:[email protected]]
Sent: Tuesday, September 26, 2000 11:12 AM
To: [email protected]
Cc: [email protected]
Subject: Re: Verifying functionality of the equipment for Production
Safety Testing
Hi Paul,
First, I would caution you from holding the hipot test lead while the tester
is in operation. It
could certainly be hazardous to your health, and all that. I wonder if this
is one of those "don't
try this at home" cases.
Anyway, in another life while undergoing an initial BABT 340 quality system
audit, the auditor asked
us "How do we know that the tester is working properly, and how do you know
the tester will give a
failure indication when expected?" Well, these were questions we had not
anticipated and were
unprepared with a quick answer. To meet the auditor's challenge, however, we
fashioned a setup that
verified the complete tester, including cables. This verification setup
included 2 resistors (one
for hipot and the other for ground continuity). The values for each resistor
were selected so that
the testers would indicate a failure at just over the current trip point of
each tester. To verify
the setup each day, the testers were tested using these resistors (a failure
indication was a pass
and a pass indication was a failure). The resistors and the test equipment
were all placed on a
routine calibration cycle. This satisfied BABT and other safety agencies
that performed the
facility/product audits.
I hope this helps.
Best regards,
Ron Pickard
[email protected]
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Jim Bacher: [email protected]
Michael Garretson: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
-------------------------------------------
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Jim Bacher: [email protected]
Michael Garretson: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
