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.
Rating Newest Oldest. Best Answer: You need to have at least 500 Nectar points on your card to use them to get Â£2.50 off your purchase. If you've got 1000 points then you can get Â£5.00 off your purchase, 1500 points = Â£7.50, 2000 points = Â£10.00..and on and so forth.If you have anything less than 500 points then you cannot use them in Argos.And yes you can part pay with points and cash, so if the item was Â£3.00 (perhaps a Â£2.99 pair of earphones) you could get Â£2.50 off that and pay the 50p more in cash.Hope this helps. Source(s): personal knowledge.f you have anything less than 500 points then you cannot use them in Argos. And yes you can part pay with points and cash, so if the item was Â£3.00 (perhaps a Â£2.99 pair of earphones) you could get Â£2.50 off that and pay the 50p more in cash. Hope this helps. Source(s): personal knowledge.