General Information
1-4 Rev 2/01
Figure 1-1. eFlow EF-Series Flow Computer
The built-in Liquid Crystal Display (LCD) provides the ability to look at data and configuration
parameters while on site without using the local operator interface (LOI) and a PC. The LCD display
is factory-mounted directly to the Main Electronics Board and visible through the window on the front
panel. Through this display, you can view pre-determined information stored in the unit. Up to 16
items can be defined for display. The display automatically cycles through the configured list of items
displaying a new value approximately every three seconds.
A Motorola 32-bit CMOS microprocessor runs at 14.7 MHz and has low-power operating modes,
including inactivity and low battery condition. The EF-Series Unit comes standard with 512K of built-
in, super capacitor-backed static random access memory (SRAM) for storing data and history. The
unit also has 512K of programmable read-only memory (flash ROM) for storing operating system
firmware, applications firmware, and configuration parameters.
The built-in inputs and outputs (I/O) on the EF-Series Unit consist of a port for the Sensor, a 4-wire
Resistance Temperature Detector (RTD) input interface, and a discrete output (DO). Three diagnostic
inputs are dedicated to monitoring battery voltage, charger voltage, and enclosure/battery temperature.
Refer to Section 2 for more information.
Mounting Flange
Display
Cover
Operator
Interface
Connector
Sensor
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