Lake Monitors Flow Transmitters - Manual (Page 14)

TROUBLESHOOTING & MAINTENANCE
Page 14 / Flow Meters / Lake Manual
TROUBLESHOOTING CHART
Malfunction: Magnet follower sticks in mid-scale and will not
return to the “no flow” position.
Possible Cause:
Horizontal/Vertical Mount
Particulate, Thread seal tape, rust or
other foreign matter is holding the
internal parts form returning.
Horizontal/Vertical Mount
A surge or shock in the fluid flow
moved the internal magnet faster that
the external follower could follow, thus
separating the follower from the magnet.
Corrective Action:
Disassemble and inspect meter for
contamination. Install proper filtration
or problem may reoccur.
Warning: Shut down systems before removing meter from flow line. Remove meter from
system. Tip the meter so the arrow on the flow scale points upward. This should
return the magnet follower to the “no flow” position. Add some type of surge
protection, or problem my reoccur.
Malfunction: Meter scale reading is off an equal amount
at all points and the magnet follower still
moves freely.
Possible Cause:
Reading the scale using the top or
bottom edge of the magnet follower.
Corrective Action:
Be sure to read the scale using the
black reference line which runs around
the magnet follower.
Possible Cause:
Fluid being monitored may not be
compatible with standard meter scale.
Corrective Action:
Standard meters are calibrated for
.873 SP. Gr. oil at 110° (43°C) using
Mobile DTE 25 Medium fluid. Check
your fluid data for a variance, or call
the factory for assistance.
Possible Cause:
All meters are calibrated in the vertical
position.
Corrective Action:
Check with the factory for a correction
factor or for a replacement scale cor-
rected for horizontal use.