4.0
Reference Information
This section presents an overview of the operation of the Electronic Modulevel Displacer Level
Transmitter, information on troubleshooting common problems, listings of agency approvals, lists
of replacement and recommended spare parts, and detailed physical, functional, and performance
specifications.
4.1
Description
The Digital ES II and Analog EZ Modulevels are advanced, intrinsically safe or explosion proof two-
wire or four-wire instruments utilizing simple buoyancy principles to detect and convert liquid level
changes into a stable 4–20 mA output signal. The linkage between the level sensing element and the
output electronics provides a simple mechanical design and construction. The vertical in-line design of
the transmitter results in low instrument weight and simplifies installation. The instrument comes in
a variety of configurations and pressure ratings for varied applications.
The Digital ES II Modulevel has micro-processor based electronics with HART compatible output,
in addition to the standard 4–20 mA DC output. The Analog EZ Modulevel provides a simple
4–20 mA output.
25
48-618 ES/EZ Modulevel Displacer Level Transmitter (Top Hat Assembly Design)
Terminal
junction box
Electronic enclosure
Printed circuit board
Moving LVDT core
LVDT
External span and
zero adjustment
(EZ models only)
Potted entrance seal
Range spring
Enclosing Tube
Displacer
External cage
Figure 23
Electronic Modulevel
Components
