Hanna calibration kits - Page 2

Reef Pilot · #1 01-12-2015, 02:47 PM

Yes, the phosphorus checker is the most accurate for ultra low range. It was not available from local vendors when I bought my phosphate checker.

However, the phosphate one is more than adequate for my needs esp when compared to the color chart test kits. Despite the 0.04 accuracy spec, I usually get zero readings until my GFO starts getting stale and needs changing. Then I start getting readings above zero, and when it gets to about 0.04, I stir up my GFO in my reactor. Usually after that it drops back down to zero. If it doesn't, I change my GFO, and then it does drop back down to zero. So with those kinds of readings that follow my actions, am more than happy with my phosphate checker accuracy.

George · #2 01-12-2015, 05:09 PM

Quote:

Originally Posted by Reef Pilot

Yes, the phosphorus checker is the most accurate for ultra low range. It was not available from local vendors when I bought my phosphate checker.

However, the phosphate one is more than adequate for my needs esp when compared to the color chart test kits. Despite the 0.04 accuracy spec, I usually get zero readings until my GFO starts getting stale and needs changing. Then I start getting readings above zero, and when it gets to about 0.04, I stir up my GFO in my reactor. Usually after that it drops back down to zero. If it doesn't, I change my GFO, and then it does drop back down to zero. So with those kinds of readings that follow my actions, am more than happy with my phosphate checker accuracy.

Your experience is called consistent. It has nothing to do with accuracy. In order to know if your device is accurate, you have to calibrate it against a known standard. For argument's sake, your actual PO4 could be 0.2 before and 0.1 after (even though your device reports 0.04 and 0).

Bblinks · #3 01-13-2015, 02:59 AM

Quote:

Originally Posted by davej

Picked up a set to check my low range phosphate checker. Read exactly 1.00 like it should have. Good to know it's working right.

Not sure if you are using it correctly, I might have to borrow the calibration fluids and check it out in my Hanna.....

davej · #4 01-13-2015, 06:54 PM

Quote:

Originally Posted by Bblinks

Not sure if you are using it correctly, I might have to borrow the calibration fluids and check it out in my Hanna.....

Rich you would be more than welcome, but..
It's a one time use kit.
Comes with two vials one at 0.0 that you put in first to calibrate the meter C1
Then you take second vial that comes preloaded with phosphate level at 1.00, add the little powder pack and mix. After the three minutes you get second reading C2 which in my case was bang on 1.00
If you want I can bring my calibrated meter over and we can test your water with both. If reading is the same then we know yours is accurate as well.
Let me know

Bblinks · #5 01-13-2015, 08:29 PM

Quote:

Originally Posted by davej

Rich you would be more than welcome, but..
It's a one time use kit.
Comes with two vials one at 0.0 that you put in first to calibrate the meter C1
Then you take second vial that comes preloaded with phosphate level at 1.00, add the little powder pack and mix. After the three minutes you get second reading C2 which in my case was bang on 1.00
If you want I can bring my calibrated meter over and we can test your water with both. If reading is the same then we know yours is accurate as well.
Let me know

Oh I get it. I thought it was premixed and all you had to do is put it in but didn't realize you had to add powder to it still. Interesting.

If you ever have time, I would love for you to come by and do a test. Thanks very much!

Treebeard · #6 01-14-2015, 01:13 AM

Quote:

Originally Posted by davej

Rich you would be more than welcome, but..
It's a one time use kit.
Comes with two vials one at 0.0 that you put in first to calibrate the meter C1
Then you take second vial that comes preloaded with phosphate level at 1.00, add the little powder pack and mix. After the three minutes you get second reading C2 which in my case was bang on 1.00
If you want I can bring my calibrated meter over and we can test your water with both. If reading is the same then we know yours is accurate as well.
Let me know

What if the second reading is not 1.00? Is there a way to adjust it?

Treebeard · #7 01-17-2015, 10:46 PM

So, I just tested my tank water. Phosphates = 0.
So I tested the reject water from my RO/DI, phosphates = 0.
Has anyone seen these calibration kits in Canada? If not I will order from BRS and have it shipped to a friend in Chicago and have her ship it to me.