Probing powered circuit board with oscilloscope

[dalpets]

As a first venture I want to use my Siglent 1102CML 100Mhz oscilloscope to probe a Velleman EDU06 circuit board, powered by a 240V/9V AC, 2 pole battery.
 I have read Dave's post 279 re earth referencing & related safety issues & I want to make sure that it is safe to do so with this setup, without any additional isolation measures.

Thanks

[thm_w]

Velleman EDU06 circuit board: https://ca.robotshop.com/products/oscilloscope-tutor-board

Assuming the input plug you are powering it with is an isolated wall adapter (most AC adapters are, some DC adapters are some aren't).
There should be no mains reference on the board, which means its safe to connect anywhere. Also the voltage is stepped down to a safe level (9V).