Chapter 2: Overview; Pool Chemistry Overview; The Hydroguard Solution; Features And Modules - Blue I HydroGuard HG-302 Manual De Uso

Chapter 2: Overview

The HydroGuard HG-302 Water Quality Controller continuously monitors and automatically controls chemical
levels in pool water. HydroGuard automates chlorine, pH, ORP (Redox), temperature, and other water
quality tests (i.e. turbidity, total chlorine, etc.), administering pool chemicals as required, according to the
results of these tests.
2.1

Pool Chemistry Overview

Pool chemistry is the science of controlling the concentration of chemicals used to purify swimming pool
water under changing conditions. Chlorine is commonly used to kill dangerous bacteria and other organisms
that grow in pool water. Acid or base chemicals maintain proper pH values for the comfort of bathers and to
effectively disinfect the water. These chemicals must be in a high enough concentrations to effectively kill
water-borne bacteria. In overly high concentrations, however, these same chemicals may also be dangerous
to swimmers who bathe in the pool. Various methods have been developed over the years to monitor and
control the concentration and balance of chemicals used in pool water.
detect the level of acidity (pH), and electronic pH monitors have been used more recently.
2.2

The HydroGuard Solution

The older manual methods of monitoring chemical balance are neither objective nor effective. HydroGuard
measures free (and optionally total) chlorine levels with a digital photometer, which has many advantages
over other types of sensors. Digital photometer testing is completely objective. It is not dependent on
lighting conditions or the operator's eyesight, and is far more accurate.
calibration and is compatible with all types of disinfectant systems. HydroGuard performs colorimetric testing
in a closed reading cell. It is the only system that automatically and accurately measures free chlorine using
small amounts of reagent.
Once installed and calibrated, HydroGuard is fully automatic. It controls dosing systems directly, releasing
the proper quantity of chemicals based on frequent automatic measurements. HydroGuard is simple to use.
Its straight-forward control panel and parameters menu make chemical balance control an easy task. All
basic information can be viewed at a glance, and changing settings is as simple as scrolling through the
menu and adjusting the current settings.
2.3

Features and Modules

The HydroGuard unit measures four basic parameters that indicate pool water quality. Four optional modules
may also be added. Details about the optional components are not included in this manual; Additional
manual sections will accompany the optional features.

2.3.1 Standard Modules

• Free Chlorine
• pH
• ORP (Redox)
• Temperature
Litmus paper was originally used to
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It does not require frequent