3) Set the trip point knob to the conductivity measured by the hand held meter
(Fig. 7).
4) Turn the cal knob fully counter clockwise and momentarily activate the test
switch (Fig. 8). If the unit is in continuous mode you will need to wait 10 sec-
onds before slowly turning the cal knob clockwise. If the unit is in the timed
sample mode you will need to wait for the blow down interval to pass, 30 sec.,
1, 2, or 4 minutes before slowly turning the cal knob clockwise. When the con-
trol led turns off stop turning the cal knob, the unit is calibrated.
C. SETTING CONDUCTIVITY TRIP POINT
1) Turn Trip Point Knob to position
pointer on scale to desired trip point.
(See Fig. 9)
NOTE: All standard ABC units have a
differential control that has been
factory set to approximately 6% of
the Trip Point. This important fea-
ture prevents “chattering” (the rapid
on-off switching of the relay when
system conductivity hovers near the
trip point).
The minimum blow down interval in
Continuous Sample Mode is eight
seconds to allow for full movement of
a ball valve.
Fig. 9 Set Trip Point
Fig. 7 Position Trip Point Knob
Fig. 8 Turn Cal Adjust Knob
9
