- Joined
- Feb 8, 2020
- Messages
- 42
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Hi all
Wanted to raise a question about Hanna in general hoping someone may know the scientific answer. Been using Hanna for a while no issues but while sitting around bored today, decided to actually read through the entire manual of the URL phosphate. Would anyone know why they math in the manual for accuracy does not align. For example.The manual for this checker shows
+- .02ppm +- 5% @25c/77f
If for example my phosphate level was 0.8 a 5% variance is .04 and if that is the case why mention the +- .02ppm. Or are you really suppose to be interpreting there results as the min of the .02. Or 5% of result. And vice versa is my reading as .1 a 5% variance is only .005 and therefore then need to max the .005 and .02 to determine which variance to apply to the checker result. Thoughts?
This does seem to be common across other checker and I keep my tank at 78f so would images temp in the vial drops a tick during testing can comes close to the 77f also mentioned.
Thanks
Wanted to raise a question about Hanna in general hoping someone may know the scientific answer. Been using Hanna for a while no issues but while sitting around bored today, decided to actually read through the entire manual of the URL phosphate. Would anyone know why they math in the manual for accuracy does not align. For example.The manual for this checker shows
+- .02ppm +- 5% @25c/77f
If for example my phosphate level was 0.8 a 5% variance is .04 and if that is the case why mention the +- .02ppm. Or are you really suppose to be interpreting there results as the min of the .02. Or 5% of result. And vice versa is my reading as .1 a 5% variance is only .005 and therefore then need to max the .005 and .02 to determine which variance to apply to the checker result. Thoughts?
This does seem to be common across other checker and I keep my tank at 78f so would images temp in the vial drops a tick during testing can comes close to the 77f also mentioned.
Thanks