Pinpointing the Buried Fault | 3M 2250M-iD, 2273M-iD specification

5.Press on: Ohm-meter/Fault Locate/Tone [T-2] to turn the transmitter on and place the transmitter in Ohm-meter mode.

−− The resistance of the fault will be displayed in ohms on the transmitter Digital Display [T-4].

−− Resistance less than 50KΩ = Significant fault exists

−− Resistance 50KΩ to 1.0MΩ = High resistance fault exists (May or may not cause problems yet, but gets worse with time.)

−− Resistance greater than 1.0MΩ = No significant fault exists

Note: The fault locating limit is 2.0MΩ, although the transmitter's ohm-meter mode can display a fault resistance up to 10MΩ.

−− Note: The fault locating limit is 2.0MΩ, although the transmitter's ohm-meter mode can display a fault resistance up to 10MΩ.

6.Press on: Ohm-meter/Fault Locate/Tone [T-2] again, to select Fault Locate mode.

−− The Indicator Flag will turn on under the fault icon in the Digital Display [T-4] (as shown in the illustration below)

B. Pinpointing the Buried Fault

1.Connect the 3M™ Earth Contact Frame (also known as an A-Frame) to the External Jack [14] ([13] on 2250M) of the receiver using the earth frame cable (4 ft. (1.2m) cable).

2.Press On/Off (Power) [1] to power on the receiver. The receiver display screen will display "Fault Calibrating" for about 5 seconds.

3.Press Locate/OK [5].

4.Press Fault [SK] to select Fault mode.

5.Hold the receiver in one hand and the Earth Contact Frame in the other with the solid green-banded leg of the frame toward the test section. Near the location of the ground rod (about one Earth Contact Frame width away from the ground rod, slightly to the side and towards the faulted cable), insert the Earth Contact Frame probes fully into the ground in line with the target path.

6.Press Ref [SK] to record the fault level reference signal. The signal level will be recorded in the box above Ref [SK] on the display. This reference indicates the Signal Strength [10] level at the ground rod. When the operator reaches the major fault location, the Signal Strength [10] indicated on the receiver will be very close (within 12dB) to this reference signal level.

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3M 2250M-iD, 2273M-iD manual Pinpointing the Buried Fault

Contents

3M Dynatel Contents Rev G Rev G Rev G Intended Use Safety Information About This Manual Quick Start Transmitter Battery Installation Receiver Battery Installation Service and Accessories Cleaning 3M Dynatel Transmitter 2273 Keypad and Connector Definitions Maximum Transmitter Output Rechargeable Battery Dynatel 3M Dynatel Receiver 2250M Key Pad and Display Definitions 3M Dynatel Receiver 2273M Key Pad and Display Definitions Main Menu Menu Displays Rev G Rev G Setting the Receiver Clock Configuring The ReceiverSelect Depth Units Selecting a Language Enabling/Disabling Frequencies Menu 6 + More SK4 + Setup SK6 + More SK6d + Tone Freq SK6jCreating User Defined Frequencies Selecting Locating Audio Filtering Power Frequency Interference Direct Connect Method Buried Cables And Pipes Transmitter Connections Rev G Dyna-Coupler Method Induction Method Non-Sweeping Passive Induction Mode Locating Passive Sweeps Sweeping Active Induction Mode Locating One-person Active Induction Mode Sweeps Transmitter Set-up Two-person Active Induction Mode Sweeps Locate/OK 5 + Cable/Pipe SK + Mode SK + DirNull SK Toggle Locate/OK 5 + Cable/Pipe SK + Mode SK + Dir Pk SK ToggleReceiver Modes Directional Peak Dir Pk Special Peak Spl Pk Locate/OK 5 + Cable/Pipe SK + Mode SK + Spl Pk SK Toggle Locate/OK 5 + Cable/Pipe SK + Mode SK + Ind Pk SK Toggle Expanded ModeDepth and Current Estimate Induction Peak Ind Pk Active Frequencies Locating Frequencies Passive Frequencies Power FrequenciesAuxiliary Frequencies Locating in Directional Peak Mode Rev G Determining ADP Depth Locating Active Duct Probes Sondes Transmitter Setup Locating Buried Sheath Faults and Earth Return Faults Pinpointing the Buried Fault Green Band Locating 3M Electronic Markers 3M iD Markers Alert ModeEnabling/Disabling Marker Types Press Locate/OK Single Marker Locate 3M iD Marker Depth Dual Marker Locate Passive 3M Electronic Marker Non-iD Depth Creating New Templates Creating/Editing Templates for 3M iD MarkersMenu 6 + Data/Templat SK2 + User Templat SK2c Rev G Editing Templates Writing 3M iD Markers Menu 6 + Write Mode SK1 Press Start Write SK Modifying Marker Data to be Written Press Menu 6 + Write Mode SK1 Rev G Reading 3M iD Markers Read History Reviewing Marker Read/Write HistoryMenu 6 + Data/Templat SK2 + Read History SK2a GPS Operation Capturing the GPS Coordinates Capture Mode / ModeWrite History SK Communicating with the GPS Device Path Mapping with GPS Menu 6 + COM Setup SK3 + GIS Menu 6 + Com SK3 + GIS SK or PDA SK Creating Trace Templates Additional Applications Aerial Faults Toning Cable Identification Connection Diagrams Menu 6 + More SK4 + Help SK8 Help Mode Menu 6 + More SK4 + Self Test SK7 Self Test Of Receiver Standard Configurations Product Description And Optional AccessoriesProduct Description Direct Connect Cables Earth Contact Frame Optional 3M Accessories for 3M Dynatel Locators Specification Receiver Specifications Detection Depth 3M Non-iD Passive Mode can display a fault resistance up to 10M Ω Transmitter Specifications Rechargeable Battery Information Environmental and Regulatory Specifications Rev G Important Notice Electrical Markets Division