23
Q.
How do I make sure the ORP sensor is
working properly?
A.
Watch the sensor reading when adding sanitizer. If it
does not respond properly, follow the recommended
cleaning procedures, see Maintenance. If cleaning does
not solve the problem, check the sensor as outlined in
the Maintenance section.
Q.
How should the ORP sensor respond to adding acid?
A.
Adding acid decreases the pH level thus increasing
the ORP.
Q.
How should the ORP sensor respond to adding base?
A.
Adding base increases the pH level thus decreasing
the ORP.
Q.
How should the ORP sensor respond to adding sanitizer?
A.
Depending upon the type of sanitizer used, the ORP
should increase. A sanitizer high in base, such as liquid
chlorine (sodium hypochlorite) or a dry chlorine powder
(calcium hypochlorite), however, can cause the pH level
to rise and the ORP to decrease. The pH level must be
in the ideal range to maintain the proper ORP level.
Q.
Can ORP be used with ozone?
A.
Even though ozone is an excellent oxidizer, it has a
very short lifetime. Therefore, a chlorine or bromine
residual will still be needed in order to maintain the
proper ORP level. When using ozone, the ozone must
be introduced into the system downstream from
the sensors.
Q.
Can ORP be used with UV or metal ions?
A.
Only if the proper chlorine or bromine residual
is maintained.