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EXCEL TECHNOLOGY GROUP
ABN 88 010 990 208
Specification Conformity Declaration
In-pavement Vehicle Detector Loop Tester
Report No: ETG-0512-29/ST
Date Issued 5
th
December 2007
Equipment Type:
LTM-1000 In-pavement Loop Tester
Serial Number ET-0708-029
Equipment Description
The in-pavement loop is a primary source of vehicle detection on the
public road network. The device under test (DUT) excites an in-
pavement loop coil (typically 100micorhenries) to a resonant state
(typically 50khz). Upon detecting resonance and measuring resistance
the device reverse calculates the coil inductance based on frequency
and a preset capacitance reference.
Test Schedule and Compliance Statement
The LTM1000 ‘In-pavement Loop Tester’ Serial Number ET-0708-029
was tested in relation to preset calibrated test loops and in accordance with
the manufacturers product specification LT_IND50-420
is certified as compliant with this specification.
Power Supply
9VDC battery Source
Microcontroller
PIC16F874 / 11.0592 Mhz Oscillator
Road Loops
Typically 4 Turns of wire 2 Metres x 2 Metres Square roadbased
Surge Protection (Lightning Discharge) each roadbased loop
1500 V 1/2 W 100kohms 90V
Inductance A - 128 Microhenries/Res 2.6 ohms
Inductance B - 174 Microhenries/Res 2.1 ohms
Inductance C - 345 Microhenries/Res 1.9 ohms
Inductance D - 420 Microhenries/Res 1.6 ohms
Communication
No Provision - not used
Signature
________________________________
Date
05_ / 12_ / 07
Excel Technology Group Pty Ltd
ABN # 88 010 990 208
18 Staple Street
Seventeen Mile Rocks QLD 4073
Australia
