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Related Manuals for Excel Technology LTM-2000
Summary of Contents for Excel Technology LTM-2000
- Page 1 PRODUCT USER GUIDE LTM-2000 IN-PAVEMENT LOOP TEST METER ETC_PUGM_LTM2K_v1.0...
- Page 2 Disclaimer 1 DISCLAIMER Excel Technology Co Pty Ltd (ETC) reserves the right to make changes to the technology described in this document without notice and advises its clients to obtain the latest version of the relevant information prior to placing an order. Excel Technology Co Pty Ltd warrants its products to the specification detailed...
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Page 3: Warning
RED or BLACK test leads • Do not connect the RED or BLACK terminal leads to any sensitive electronic equipment during the insulation test as it may damage the equipment. 3 CONTACT EXCEL TECHNOLOGY CO Email: enquiries@exceltech.com.au Website: www.exceltech.com.au... -
Page 4: Table Of Contents
LTM-2000 Contact Excel Technology Co 4 CONTENTS DISCLAIMER .............................. I WARNING ..............................1 CONTACT EXCEL TECHNOLOGY CO ......................1 LTM-2000 IN-PAVEMENT LOOP TESTER ....................3 ..............................4 ERMINALS ............................4 NCLUDED ABLES 5.2.1 Red and Black Test Leads ........................4 .................................... -
Page 5: Ltm-2000 In-Pavement Loop Tester
• Audible beep when loop detected. The LTM-2000 is entirely portable with 30 - 250 hours of battery life using a 2600 mAh rechargeable Li-ion battery with 5 Vdc 1A Micro-USB charging. The LTM-2000 features a transflective graphical LCD display with a toggled white backlight for use in any light conditions. -
Page 6: Terminals
4. Micro USB 5V charging port. CAUTION The LTM-2000 Q Meter and Insulation Test functions are used for testing de-energised in-pavement inductive loops only. All terminals have TVS ESD protection up to 30 kV and clamping voltage up to 14.5V. Do not connect red and black alligator clips to live voltages >5 Vdc for prolonged periods as this may cause damage... -
Page 7: Usage
LTM-2000 Usage 6 USAGE 6.1 POWER 6.1.1 T EVICE To power on the device, short press the RED Power Button. • The following start-up logo will be displayed for a short period of time: • The Loop Test Meter start menu will then be displayed with the following warning message: Note: Holding the Power Button when the device is off will turn the device on for a short period of time before turning it off again. -
Page 8: Critical Battery Shut-Down Before Start Up
ATTERY NDICATOR The LTM-2000 features a rechargeable 2600 mAh Li-Ion battery with a working supply voltage between 3.6 Vdc at minimum discharge level to 4.2 Vdc at maximum charge level. The battery voltage level is indicated by a battery charge icon in the top left of the display:... -
Page 9: Usb Charging
6.2.2 USB C HARGING The LTM-2000 can be charged by simply connecting a standard USB power supply via a Micro USB charging cable to the charging port located at the bottom of the device. Maximum estimated charging time from absolute minimum discharge 0 mAh to full 2600 mAh is 5 hours. - Page 10 LTM-2000 Usage Loop Vehicle Detection Basics The loops used for vehicle detection are continuous lengths of wire embedded into the roads surface. The loop is connected via a feeder cable to the vehicle detector system in a nearby cabinet. The vehicle detector system powers the loop with an oscillating AC signal which produces a magnetic field in the loop area.
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Page 11: Instructions For Calibrating Lead Resistance
LTM-2000 Usage 6.3.1 I NSTRUCTIONS FOR ALIBRATING ESISTANCE The resistance of the loop under test can be measured between 0.10 Ω and 50.00 Ω. • Resistance of the alligator test leads may be up to 1 Ω and is calibrated during factory testing. -
Page 12: Instructions For Measuring Loop Characteristics
LTM-2000 Usage 6.3.2 I NSTRUCTIONS FOR EASURING HARACTERISTICS Step 1 Ensure that the loop is de-energised by disconnecting both ends of the loop feeder cable from the rack. A loop that is still connected to a rack may interfere with loop characteristic measurements. -
Page 13: Status Definitions
LTM-2000 Usage 6.3.3 S TATUS EFINITIONS Table 1 – Q Meter Status Definitions Resonant Status Resistance Screenshot Status LED Frequency Detected Q Meter has detected a loop LOOP with resistance between 0.10 Green Ω and 50.00 Ω resistance Yellow The resistive load between... -
Page 14: Insulation Test
‘Megger’ test where typically 500 Vdc is applied to the RED and BLACK output terminals for a short, pre-set period while the LTM-2000 monitors the resistance to earth. The test is an automated sequence, and an indicative measurement of the insulation resistance will be displayed on the LCD prior to the test completion. - Page 15 LTM-2000 Usage Step 5 The LTM-2000 can check for the following incorrect connections and will not allow the user to initiate the test until incorrect connections are resolved: • Short Circuit: If the resistance between the RED and BLACK terminals is < 50 ohms: Note: Performing the Insulation test on low impedance loads (<...
- Page 16 LTM-2000 Usage Step 8 The results are displayed on the following screen: Test Voltage Insulation Resistance Insulation Resistance Log Scale The following are example readings: Poor Resistance <10 MΩ Poor Resistance 10 MΩ Okay Resistance 100 MΩ Good Resistance >200 MΩ...
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Page 17: Loop Finder
This method of loop finding requires the operator to walk out on the road surface in the general area that a loop is located. The operator will be distracted by the LTM-2000 display and may lose awareness of approaching vehicles. This test is only to be carried out if the operator is in no danger of moving vehicles. - Page 18 NOTE: The resonant frequency of the loop detected using the loop finder may differ from the resonant frequency found using the Q Meter on the same loop due to changes in oscillating circuitry in the LTM-2000 Q Meter and vehicle detector equipment. •...
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Page 19: Locate Exact Position Of Loop Windings
LTM-2000 Usage 6.5.2 L OCATE XACT OSITION OF INDINGS • The signal will dip when the probe is directly over the loop winding wire. At this point the magnetic field lines of the loops will be parallel to the surface of the road and the probe coils and therefore no current will be induced in the probe •... -
Page 20: Locate In-Pavement Loops From A Moving Vehicle
This method should be performed using both a driver and an observer. The driver should be focused only on driving the vehicle and should not be distracted by the LTM-2000. The driver should drive in a safe manner, maintaining lane position and adhering to speed limits. The observer should take note of where along the road the loop is detected.
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