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SETPOINT ADJUSTMENTS
• Move the display selector switch to SET.
• With a small screwdriver adjust the SET COARSE trimmer to
display a value close to the desired setpoint e.g. 7.00.
• Adjust the SET FINE trimmer to display the exact setpoint value.
• Once the desired setpoint is achieved, move the display selector
switch back to MEASURE.
ACID OR BASE SELECTION (BL 7916 only)
If an acid chemical is to be dosed, move the
ACID/BASE switch to ACID. This means that
the pump will dose when pH measurements
are higher than the setpoint.
If an alkaline chemical is to be dosed, move
the ACID/BASE switch to BASE. This means
that the pump will dose when pH measure-
ments are lower than the setpoint.
REDUCING OR OXIDIZING SELECTION (BL 7917 only)
If a reducing chemical is to be dosed, move
the RED./OXID. switch to RED. This means
that the pump will dose when redox mea-
surements are higher than the setpoint.
If an oxidizing chemical is to be dosed, move
the RED./OXID. switch to OXID. This means
that the pump will dose when the redox
measurements are lower than the setpoint.
The wires and cables needed for all connections can be fed through
the two cable fittings located below the terminals. It is important to
attach these cables properly because pump vibrations could loosen
them. Replace the transparent cover and fasten the screws.
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