Hello.

I'm looking for some clarification on TM 650 Number 2.6.3.3, Surface
Insulation Resistance, Fluxes.

I am testing no clean fluxes, thus using sample groups B, C, and F (ie
patten down/no clean, pattern up/no clean and control groups).

Looking at the document, I interpret it to mean that I require 6 coupons (3
for each of B and C) for each condition I'm testing, as well as 2 control
coupons.

This amounts to, say, 26 coupons (104 combs) to test 4 conditions.

Does this number sound right, or much too high?  Is the industry norm to
follow the standard to the letter, or to use a reduced number of samples?

Or do I simply need to test 6 combs, 3 per pattern up and down (per
condition)?

Thanks in advance for any advice:-)

Cara Startek

Process Engineering
http://www.leitch.com

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