IPS Controllers M820 User Manual

I. Introducon
A. Water Chemistry
Water chemistry is a complex science that contains many variables.
These variables not only aect the water environment itself, but
they can have adverse eects on your equipment as well as your
health. These are only some of the factors which we follow closely
to ensure the most healthy water interacons:
pH is the measurement of the acidity or basicity in an aqueous
soluon. A measurement below 7 is considered acid, while a
measurement above 7 is base or alkaline. It is a signicant factor
in determining the water quality as it aects sanizer levels, water
color, and human reacon to the water.
ORP (Oxidaon Reducon Potenal) is the measurement of the
oxidizing capacity present in water. ORP cannot be fooled by the
eects of pH, total dissolved solids (TDS), stabilizers, and non-
chlorine oxidizers. A typical ORP sensor measures Hypochlorous
Acid (HOCI), which is the more eecve component of free
chlorine. A higher ORP reading equates to the sanizer working
more eecvely.
Water balance is comprised of pH, calcium hardness, total
alkalinity, temperature, and TDS. When water is balanced, the
Langelier Saturaon Index is 0. Values above +0.3 lead to scaling
and cloudy water, while values below -0.3 can cause corrosion of
pool equipment and surfaces. If the water balance is not xed in
a mely manner, secondary eects can lead to rapidly declining
water condions that can aect the health of the water occupants.
pH and ORP work conversely to one another, and are aected by
other factors such as temperature, Cyanuric Acid, and TDS that can
increase the negave impacts of unbalanced water.
2
M820 pH/Dual ORP Controller Owner’s Manual

IPS Controllers M820 Specifications

General

Brand	IPS Controllers
Model	M820
Category	Controller
Language	English