The mean roughness Ra matches the arithmetical mean of the absolute. values related to the profile deviation y within the reference length l. Max. profile valley depth Rmax (DIN 4768) The max. profile valley depth Rmax counts for the most significant single. roughness depths Zi within the total length lm.
Benefits. Every 500 Nectar points you redeem is Â£2.50 off your total, which means more money to spend on the goods you want. You can also save further Nectar points for each Argos purchase you make, simply by presenting your card at the checkout. Simply present your Nectar card at the till and the cashier will swipe your card to automatically deduct the points from your account (subject to system availability). 2  Any remaining balance will need to be paid in full by cash, debit or credit card on the day.
You can use a Nectar card to collect points with hundreds of retailers including, Sainsbury's, BP, Homebase, Expedia or when you pay your bills with EDF energy. However, there are ways in which you can maximise your points.We run through the Nectar card scheme and how you can make the most from it.oints can be spent on thousands of things from cinema trips to days out, but the value of the points varies. For example, a Nectar point spend in-store at Sainsbury's is worth 0.5p, yet many other Nectar Card redemptions work out better than this.