Meter Maintenance - GPI 03 Series Owner's Manual

Foreign material in liquid can clog the
meter's rotor. If the problem affects
meter accuracy or material coats
the rotor, install screens to filter the
incoming flow.
– For Low Flow meters use a 25
micron or .005 inch screen, 120
mesh.
– For one inch or two inch meters
use a 500 micron or .018 inch
screen, 35 mesh.
For maximum accuracy, the velocity
profile of the flow entering the meter
must be uniform throughout the cross
section of the pipe.
Make sure there are no leaks in the
connections. To seal leaks, remove
and inspect the meter and replace
the thread tape or sealant. Refer to
the Troubleshooting Section.

METER MAINTENANCE

During daily use, these meters are
virtually maintenance-free.
When not in use, rinse and clean
and keep free of liquids to protect
internal components. If liquids have
dried and caked on the rotor, refer to
the Cleaning instructions.
To Remove
WARNING
During meter removal, liquid
may spill. Follow the liquid
manufacturer's safety precau-
tions for clean up of minor spills.
1. Ensure all liquid is drained from
the meter. This could include
draining the hose, meter, nozzle
or pipe.
2. Wear protective clothing as nec-
essary, loosen both ends of the
meter. Use a wrench only on the
meter's flat metal sur faces.
CAUTION
Using a wrench on plastic me-
ters could damage the meter.
6
3. If the meter is not immediately
installed again, cap the hose end
or pipe to prevent spills.
To Clean
During use, the meter should be kept
full of liquid to ensure that drying does
not occur inside the meter. If drying or
caking should occur, the rotor will stick
or drag, affecting accuracy. In this
circumstance, cleaning is required.
To determine if the rotor is stuck or
dragging, gently blow air through the
meter and listen for the quiet whir of
the rotor.
CAUTION
Never blow compressed air
through the meter. It could dam-
age the rotor.
To clean a stuck or dragging rotor,
follow the procedures below.
1. Remove the meter from the hose
or pipe following the direc tions
above.
2. Apply a penetrating lubricant such
as WD-40 or a recommended
®
cleaning solvent on the turbine's
rotor, shaft and bearings. Allow it
to soak for 10 to 15 minutes.
CAUTION
Do not submerge the meter.
3. Carefully remove residue from the
rotor using a soft brush or small
probe such as a screwdriver. Be
careful not to damage the rotor
and support.
4. When the rotor turns freely, install
it again following the Installa-
tion instructions provided in this
manual.
To Store
After thoroughly cleaning the meter,
store it in a dry location.
WARNING
Follow the liquid manufacturer's
instructions for the disposal of
contaminated cleaning solvents.