EDI LMD222 Operation Manual - Page 4

Browse online or download pdf Operation Manual for Monitor EDI LMD222. EDI LMD222 14 pages. Inductive loop monitor

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1.1 DESCRIPTION

The LMD222 two channel and LMD224 four channel rack-mounted inductive Loop Monitor

with DEFLECTOMETER

44 pin edge connectors for connection of power, loop inputs and call outputs. The

DEFLECTOMETER

requirements of the Caltrans specifications. The LMD222 and LMD224 are compatible with

all 332 type Input Files and is intended as a plug-in upgrade for the Model 222 and 224.

The LMD222 meets or exceeds the applicable performance requirements of the California

Department of Transportation (Caltrans) specifications TEES March 2009.

Each channel has individual controls for setting up sensitivity, operational mode and

frequency on the front panel. Two high intensity front panel LEDs indicate vehicle detection

and fault monitoring status for each channel. Call outputs are available in either relay or

optically-isolated solid-state transistor form.

1.2 OVERVIEW

A dynamic Overview of the LMD operation which includes an LMD Simulator is available on

the EDI Web Site; www.EDItraffic.com.

1.3 DEFLECTOMETER

The LMD Series Loop Monitor introduces a concept to the inductive loop detector field that

revolutionizes the process of installing and programming a loop detector. The new user

interface of the LMD Series provides the feedback necessary to the signal technician to

quickly and accurately program the parameters of the detector exactly to the loop plus lead-

in system characteristics.



The DEFLECTOMETER

while a vehicle is in the detection zone. This provides feedback that the

unit is optimally tuned to detect vehicles of all sizes.



Setting the sensitivity level of the detector can be easily done in one step

with

DEFLECTOMETER

changed. See section 2.1.1.



The simple push-button interface is intuitive and eliminates many of the

reliability problems found with tiny DIP switches of conventional detectors.



Operational mode, Frequency, and Sensitivity are all programmed and

displayed using the push-button interface. Settings are stored in non-

volatile memory.

Loop diagnostic capabilities incorporated within the LMD Series Loop Monitor enable the

detection of short or open circuit loops and sudden changes of inductance exceeding 25

percent of the nominal inductance. Each type of fault is signified by the fault indicator

emitting a different flash sequence. This information can greatly assist the user in the

diagnosis of loop related problems.

Eberle Design Inc.

LMD222 and LMD224 Series

Operations Manual

Section 1

GENERAL

Series is built on the international card format with double-sided

push-button user interface far exceeds the DIP switch based

FEATURE

Why guess when you can know!

display shows the relative strength of the call

"typical"

vehicle

display updates dynamically as the sensitivity level is

parked

the

detection

zone.

The

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