c. Drill a 7/16” hole and tap a 1/4” NPT port to a location
downstream from the filter and upstream from any
chemical introduction points. Install a tubing connector
(included) and flex tubing to be connected to the left
side flow cell port containing the flow switch. The in-line
filter will also be installed in this line and mounted to a
horizontal pipe with band clamps (included).
Note:
Verify
that the filter is installed with directional arrows pointing
in the direction of the flow.
d. Drill a 7/16” hole and tap a 1/4” NPT port to a location that
is subject to vacuum or reduced pressure. Install a tubing
connector (included) and flex tubing to be connected to
the right side flow cell port.
Note: We recommend that
this tubing connector be installed into the drain hole on
the suction side of the pump for best performance.
e. Cut a 3” - 6” length of flex tubing and insert into the flow
cell’s sample stream port (center).
3. pH and ORP Sensors
Note: Carefully unpack the pH and ORP sensors and set aside in a
clear area until ready to install into the flow cell.
a. Verify that the M720 controller power is OFF.
b. Carefully remove the plastic protective caps from the
sensors and store in a separate location for future re-use.
c. Slide the glass end of each sensor (pH and ORP) into their
corresponding compression fittings located at the top of
the flow cell. Ensure that the tip is submerged into the
water to within 1/2” from the bottom of the flow cell.
Hand tighten each nut fitting.
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M720 pH/ORP Controller Owner’s Manual