Manual

48
XXVI. ADDENDUM: NEW ORP PPM FREE CHLORINE FEATURE
For 6Psi ONLY Software V.3.51 and later (see pg. 46).
Contact the Myron L Company for more information:
www.myronl.com
*Given water is sanitized by only chlorine at a pH of 5-9 and a temperature of 20-30ºC
A convenient new feature has been added to the Ultrameter II 6Psi™


most commonly used sanitizer measurement units used in water quality


 and bench testing
performed at the Myron L Company. We have increased the accuracy of low-
range ppm free chlorine readings by extrapolating from the published data.
With this new feature the 6Psi can measure a dynamic range of sanitizer
concentrations that is wider than the range of a colorimetric test kit.
Plot Showing the Conversion Curve between ppm and mV*
Additional ORP Specications
Spec Value
Ranges ± 999 mV
0.20 – 9.99 ppm
Resolution mV resolution: 1 mV
ppm resolution: 0.01 ppm
Accuracy ± 1 mV
± 2.5% of reading ppm*
8
10
6
4
2
0
0 100 200 600500400300 700 800
ORP (mV)
ORP
(ppm
free
chlorine)
ORP mV to ppm Conversion Curve