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Dawson DCT220 User Manual

Cable locator
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DCT220
CABLE LOCATOR
User's Manual

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Summary of Contents for Dawson DCT220

  • Page 1 DCT220 CABLE LOCATOR User’s Manual...

  • Page 2: Table Of Contents

    ......6.2 Checking the transmitter's fuse 3.1 One-pole application ..............6.3 Cleaning Dual-pole application ......6.4 Replacing the battery 3.3 Increasing the effective detecting ............radius in charged circuits 6.5 Calibration ....3.4 Non-Contact Voltage detection Contact Dawson........40...

  • Page 3: Open-Case Lnspection

    OPEN-CASE INSPECTION SAFETY INFORMATION When receiving the Cable Locator,please inspect carefully to ensure no damage has occurred during WARNING transport.Control switches and connectors need to be This cable locator is produced in accordance with checked.If there is any obviousdamage or functional safety specifications for electronic testing instruments.
  • Page 4 Attention Please observe the following instructions to ensure safe operation and optimal performace. 1)Preliminary Inspection Check the meter and accessories thoroughly before use. Contact your local distributor if the meter or any components are damaged or malfunction. WARNING Follow all standard safety procedures regarding the use of electrical testing instruments when using the 3)Use cable locator.
  • Page 5 WARNING 1. Operating temperature of the instrument is 1. Measurements near electrical installations should only be 0-40°C (32-104°F). performed by professionals. 2. Always protect the device against exposure 2. Remove test leads from any live circuit before disconnecting to excessive mechanical vibration or leads from transmitter.

  • Page 6: Overview

    1.2 Features • Detecting cables, electrical lines, water/gas supply lines buried in the wall/ground. 1. If the instrument has been stored in unfavorable • Detecting breaks or shorts in cables and electrical lines conditions, place the instrument in a more favorable buried in the wall/ground.

  • Page 7: Description

    1.3 Description 1.3.3 Receiver 1.3.1 Transmitter Receiver Tip LCD Screen Ground(-) Jack Power Button Input/Output(+) Jack Flashlight Button LCD Screen Backlight/Audio Mute Button Power Button Up Button Power Level Select Button Flashlight(under tip) Backlight/Audio Mute Button Manual Sensitivity Button Up Button Non-Contact Voltage Button Start/Stop Tranmission Button Down Button...

  • Page 8: Measurement Precautions

    MEASURING PREPARATION 1.3.5 Receiver's display using different modes 2.1 Measurement Precautions (2) Manual mode (1) Automatic mode 1. Because the transmitter, when connected to a live socket/mains, may generate a small current, the negative side of the transmitter should only be connected to the neutral line.

  • Page 9: Connection Methods

    2.2 Connection Methods Optional connections: 1. Ensure the transmitter is connected in a 1. One-pole connection: Connecting the closed circuit before performing any transmitter using one lead. Because of the function. high-frequency signal generated by the 2. The cable locator can only detect lines transmitter, only one conductor can be that are connected in this manner...
  • Page 10 2.3 Examples of Typical Application Take a 15-20ft piece of multi-core shielded cable with a Make sure the diameter of about 1.5mm and attach the cable to a wall. ground is properly Don't connect the cable to any power source. Make sure installed before the wall is accessible from both sides.Create a break in measurement.

  • Page 11: Using The Meter

    3.1.2 Track and find connected lines/sockets. 3. USING THE METER Must be a dead circuit 3.1 One-pole Application Neutral and ground lines must be correctly connected 3.1.1 Open Circuit and operational. Detecting interruptions in in-wall/buried lines. Connect the "+" end of the transmitter to the hot line and Find/track lines, sockets, junction boxes, switches, etc.
  • Page 12 3.1.3 Finding interruptions 3.1.4 Locating interruptions using two transmitters Must be a dead circuit When using the transmitter to locate an interruption in a Connect adjacent lines to an auxiliary ground like in line, depending on the conditions, finding the interruption fig.
  • Page 13 1. Ensure the ground is connected properly. 2. The transition resistance of the interruption must be higher than 100kΩ. 1. The point at which the signal 3. When tracking interruptions on multi-line cables, all other received by the receiver lines inside the cable's casing/conduit need to be grounded. drops abruptly will be the If not, the transmitter's signal might bleed into other location of the interruption.
  • Page 14 The detection of laid tap water pipe and heating pipe 1. If you don't have a metal tube/flexible conduit, you can use is shown in Fig.3-1-7a and Fig.3-1-7b respectively: a non-conductive tube with a metal wire of at least 1.5mm in diameter in the tube to carry the signal from the transmitter.
  • Page 15 3.1.8 Detecting power supply circuitry on the 3.1.9 Tracking underground circuits same floor Preconditions: When detecting the power supply circuit on the same The circuit CANNOT be charged floor,please take the following steps: Connect the transmitter as shown in fig. 3-1-9 Make sure to properly ground the negative end of the 1.

  • Page 16: Dual-Pole Application

    3.2.2 Find correct breaker 3.2 Dual-pole Applications Connect the transmitter to a socket connected to the 3.2.1 Closed circuits breaker panel under test and adjust the transmitter For use on charged or uncharged circuits power to a suitable level. For uncharged circuits, the transmitter only sends signals Turn off all switches at the breaker box to be received by the receiver.For charged circuits, the Connect the transmitter to the test socket as in fig.
  • Page 17 3.2.3 Finding a short in a circuit 3.2.4 Detecting deeply laid circuits In dual pole applications, if the measured line is made of Preconditions: multiple wires within the same cable (i.e. standard power CANNOT be a live circuit cable), the detection depth can be very limited due to the Connect the transmitter as in fig.

  • Page 18: Increasing The Effective Detecting Radius In Charged Circuits

    1. In this application, the humidity or material of the wall in 1. When switching the connection between core wires, switch comparison to the depth of the line is insignificant. codes to better distinguish between them. 2. When using the receiver, the stronger the signal received, 2.

  • Page 19: Non-Contact Voltage Detection

    3.4 Non-Contact Voltage detection Preconditions: 1. When using the receiver, Must be a charged circuit. the stronger the signal received, the closer the Follow the example as shown in fig. 3-4. transmitter is to the cable. Set the receiver to NCV mode to begin detection 2.

  • Page 20: Other Functions

    4. Other Functions 5. Specifications 4.1 Voltmeter functionality on the transmitter 5.1 Transmitter Specifications Using the test lead jacks on the transmitter, you can Output signal 125kHz connect test leads to a circuit and measure its AC voltage. DC 12~400V±2.5%;AC 12~400V(50~60Hz)±2.5% Voltage test range As long as the voltage present is larger than 12V, the Display...

  • Page 21: Receiver Specifications

    How to check the fuse of the transmitter: delivery; Dawson does not cover damage due to delivery. 1. Disconnect the transmitter from any circuit. 3. There is a fuse within the transmitter. If it blows, 2.

  • Page 22: Cleaning

    1. Make sure all equipment is turned off and instrument is Contact Dawson disconnected from any circuit before replacing the battery. Dawson Tools, Inc. 2. Only use the type of battery specified in the specifications. 1142 S. Diamond Bar Blvd., #858 3.

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