Interface; Density; Troubleshooting - Magnetrol E3A Modulevel Installation And Operating Manual

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3.2.3 Interface

E3 MODULEVEL is capable of tracking the interface level
of two immiscible liquids with different densities. Each unit
is custom-made with a displacer specially designed for the
user's application. This allows it to detect the position of a
clean interface or an emulsion layer and convert it into a
stable 4–20 mA signal. Contact the factory for assistance in
specifying an E3 for interface service. Note that for proper
interface detection, the entire displacer must always be
immersed in liquid.

3.2.4 Density

Yet another capability of E3 MODULEVEL is to track the
changing density of a liquid over a known density range and
convert that into a stable 4–20 mA output signal. As the
density of the liquid changes, so does the mass of the liquid
displaced by the specially designed displacer. The resulting
change in buoyancy force on the displacer causes the move-
ment of the LVDT core necessary to convert the density
change to the 4–20 mA signal.
3.3

Troubleshooting

The E3 MODULEVEL displacer transmitter is designed,
engineered and constructed for trouble-free operation over a
wide range of operating and application conditions. Below,
common transmitter problems are discussed in terms of
their symptoms and corrective actions.
WARNING Explosion hazard. Do not remove covers unless power
has been switched off or the area is known to be non-
hazardous.
Use of the included PACTware
recommended and invaluable for troubleshooting and
advanced calibration. A HART RS232 or USB modem
(purchased separately) is required. See MAGNETROL
PACTware ™ bulletin 59-101.
WARNING Other than operation of the push-buttons to enter param-
eter data, live maintenance is not permitted.
™ PC program is highly
48-635 E3 Modulevel ® Displacer Level Transmitter