Chain Adjustment Question - Define "Slack"

[positivecarry]

Easy question...when measuring slack in your chain, which is measured to compare to spec:

1) Slack when pushed down AND pushed up from where it naturally lies?

or

2) Slack when pushed up from where it naturally lies (will obviously be smaller measurement than #1)

I read this guide (http://www.ducatisuite.com/chain.html) to imply that you only measure the chain slack when pushed up from where the chain sits naturally.

The shop manual text seems to agree, but I've read conflicting advice on this forum.

[Ddan]

I measure it from where it hangs on its own.

[64duc]

 Assuming there is no slack in the top run of the chain, you measure pushing up.  I push down and up.

[Howie]

Assuming there is no slack in the top run of the chain, you measure pushing up.  I push down and up.

Xakly.

It is also better to err on the side of loose.

I measure it from where it hangs on its own.

Me too.

[J5]

push up and down

measurement is the full deflection

remember to check in several spots as when chains stretch you get tight spots and that ends badly