help with Hanna phosphate checker

[Magickiwi]

Originally Posted by straightrazorguy

I know, but the difference between 0.10 and 0.17 puts it in the same ballpark. It's not an order of magnitude difference.

Where did the 3 minute rule come from? It takes me longer than 3 minutes to dissolve all the reagent floaties.

The meter shuts off automatically after three minutes. Convenient huh?

[straightrazorguy]

Originally Posted by Magickiwi

The meter shuts off automatically after three minutes. Convenient huh?

I know, but you can pre-mix your vial before you even turn the meter on. That's what I do....

[lastlight]

they give you two vials. if they were both equally clean you could in theory zero the meter with the first and already have the second mixed with the reagent. but i'm wondering if the vials being different could mess with the result.