Badger Meter Positive Displacement - Manual (Page 5)

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Install the meter upstream from control valves and fluid
regulators if possible. See Figure 1. Back pressure from control
valving is beneficial for stable running.
Eliminate all dirt, debris and metal shavings from the piping as
the liquid must be free from any particles larger than allowed by
the manufacturer’s specifications. Any recommended filtration
should be installed before operation as potential plugging most
often occurs at startup.
If possible, install a by-pass around the meter and flush existing
piping with the appropriate solvent before first use. See Figure 1.
Review the pick-up instructional guide prior to installation.
Locate the pick-up and wiring away from A/C motors, actuators,
heaters, relays, etc. Use only shielded cable and do not take
power from the same circuits as other devices. Ensure clean
power supplies which utilize a true earth ground. Intrinsic safety
barriers must be installed if the circuit is intended to be
intrinsically safe.
The pick-up sensor should only be installed hand tight - do not
use wrenches or channel locks. Over tightening may cause a
dimple to protrude into the meter chamber beneath the pick-up
and interfere with the free gear rotation.
Figure 1