Badger Meter Positive Displacement - Manual (Page 12)

12
DON’T: Dry paint lines using pressurized air. Flow meters are
designed to flow liquids. Meters should be closed to
air except when air is part of an automated purge
cycle. Do not dry lines after purging.
DON’T: Allow materials to dry inside the meter. When a
meter is removed from the line during maintenance,
the internals should be immediately cleaned,
lubricated and the fluid ports capped.
DON’T: Over tighten the pick-up sensor beyond hand tight.
When installing the pick-up sensor, turn it in lightly to
a hand tight torque. Do not use a wrench on the pick-
up as over tightening may cause a dimple of metal
under the sensor nose to protrude into the gear cavity
and interfere with the gear’s rotation.
DON’T: Use water or solvent for calibration or test purposes.
Water or solvent may not turn the gears at low flow
and may leave the impression that the meter is not
functioning. A calibration factor (K-factor) is issued
with the flow meter which is valid for most fluids
except water or equivalent viscosities.
CALIBRATIONS
Each flow meter is calibrated and given a K-factor using a
standard calibrating fluid at the factory. This number is accurate
for all fluids, with most viscosities, except the most water-like.
There should be no need to change this except for the very lowest
viscosities close to 1.0 cP.
If flow readings are too high: If the display shows significantly
more than the volume actually dispensed or shows flow when
there is definitely no flow, this most likely indicates an electrical
noise problem. In such cases, turn off nearby motors, heaters or
relays, check cable shielding and establish a clean ground
independent of other electrical devices before repeating accuracy