I emailed
tech@hannainst.com and here is the response I got:
Quote:
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Originally Posted by Pete
You can use the HI713 on both fresh and salt water samples.
The HI713 meters accuracy is +/-.04 + +/-4% of reading.
For example:
0ppm the accuracy is +/-.04
1ppm the accuracy is +/-.08
2ppm the accuracy is +/-.12
If you are looking for a more precise measurement you should consider using the HI736 Phosphorus Ultra Low Range meter.
This meter +/-5ppb + +/-5% of reading
This meters range is from 0 to 200 ppb (.20ppm) of Phosphorus. You would just have to do some conversion to get the reading into ppm of PO4.
To convert the phosphorus (P) reading on this meter in to phosphate (PO4) you would have to multiply by .003
For example:
Meter reads:
10ppb of P = .03ppm PO4
100ppb = .30ppm PO4
200ppb = .60ppm PO4
Regards,
Pete
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