TERM DEFINITION
Onzen Spa Boy is an advanced salt water maintenance system designed to data log pH and ORP
readings and self manage the ORP level within the specified range (545-550mV).
Onzen Output Electrode Five plate platinum-iridium Titanium electrode - equipped salt cell converts the saltwater
solution to sanitizer, and as this solution reverts back to its natural form (salt) after sani-
tizing. Unless large volumes of water are added to the spa you never have to add more
salt. The five plate electrode plastic outer casing is grey in color.
Note: When the Onzen System has activated the Output Electrode to generate sanitizer, the
electrode gives off smoke effect.
Onzen Output Electrode Version Modification status of the electrode fitted to the spa.
Calcium Hardness (CH) Calcium Hardness is a measure of the total amount of dissolved calcium salts in the water.
CH helps determine how scaling or corrosive the water is. It is believed that calcium helps
control the corrosive nature of water.
Calcium has two major problems in Hot Water Chemistry:
1. CH has a tendency to precipitate (fall out of suspension in high temperatures, ,
where pH is above 7.8ppm)
2. High pH will cause calcium to precipitate. The problem with calcium falling out of
suspension is that it collects on the heater and pump, and shortens their life. High pH
also reduces the life of the Onzen Output Electrode.
Any natural corrosiveness in the water can be combated by maintaining a slightly higher
Total Alkalinity Level.
Alkalinity
Total Alkalinity (TA)
A measure of how stable the pH is (a measure of the total levels of carbonates, bicarbon-
ates, hydroxides, and other alkaline substances in the water).
TA is referred to as the water’s “”pH buffer””. In other words, it’s a measure of the ability
of the water to resist changes in pH level.
If the TA is too low, the pH level will fluctuate widely from high to low. Fluctuations in
pH can cause corrosion or scaling of the spa components.
Low TA can be corrected by adding Arctic Pure, Perfect Balance to the spa water.
If the Total Alkalinity is too high, the water will be more susceptible to scale and high
pH. High pH may be difficult to bring down.
Note: Salt systems naturally drive pH levels to increase.
High TA can be lowered by adding Arctic Pure, Adjust Down to the spa water.
Once the TA is Balanced, it normally remains stable, although some sanitizers, and the
addition of more water with a high or low alkalinity will raise or lower the TA reading of
the water.
1.8 Definitions of Terms
Onzen Owners Manual
82
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