Using Hanna ULR P04?

[Reefltx]

Hey guys

I haven't checked my p04 in over a year. I decided to check it today with my Hanna Check (736) and got a 3 & 1. It's been a while since I last used it. Let me know if I'm doing the test correctly. Since my checker read outs are in ppb I did the test result x 3\1000= ppm??

So, my po4 is .009 & .003ppm..
That seems oddly low especially when I pulled gfo months ago.

 

[Diesel]

How old you said the test kit is?

 

[K100286]

My understanding is that the formula is: reading on meter times 3.066 divided by 1000.
How did you get 2 readings? .009 and .003?

 

[Diesel]

It's been a while since I last used it

I suspect that the tests are expired.

 

[Reefltx]

I suspect that the tests are expired.

The checker itself is atleast 3yrs, but the reagents I just got today.

My understanding is that the formula is: reading on meter times 3.066 divided by 1000.
How did you get 2 readings? .009 and .003?

I ran 2 tests.

 

[RMS18]

Reading x 3.066 / 1000. The box of the reagents have a exp on them if you still have the box.. I have been using this checker for over 2 years never had a bad batch of reagents. The checker has a range of +5 to -5 ppb.

 

[2una]

Beware the new lot of reagents i got 2 reagent packs & they both threw real high - like went blue before you even put them in the checker.
Both are 01/2019 expiry

Luckily still had a few older reagents to double check the new ones were telling porkies