3M 2273M-iD, 2250M-iD manual One-person Active Induction Mode Sweeps

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ground. Other passive sources exist, such as Cathodic Protection, LF and CATV cable (with NTSC TV CRT turned on).

Walk in a grid pattern over the sweep area holding the receiver as shown in the following illustration. Stop when there is a response increase, locate the position of the maximum signal, follow the conductor path all the way out of the sweep area while putting location marks on the ground. Resume the sweep until another cable or pipe is detected, or the whole area is completely swept. Switch to another available passive frequency in the receiver and sweep again.

D. One-person Active Induction Mode Sweeps

One-person active induction mode sweeps require that the transmitter be set on the ground over the suspected path of the buried infrastructure. The receiver is used to detect signals induced by the transmitter on buried long conductors. Proper placement and orientation is key to maximize the induced signal in the buried cable or metallic pipe enough to be detectable by the receiver along each path in the swept area. (Note that no signal is induced onto a conductor whose path is perpendicular to the Induction Direction indication.)

•Place the transmitter in the upright (bottom on ground) position for directional optimization when aligned with the Induction Direction shown on the label on the transmitter.

•Tip the transmitter over towards the front, and lay it on it's front surface, for multi- directional wide area induction. (Note that no signal is induced onto a conductor whose path is directly under the transmitter).

•Remove anything plugged into the Output Jack [T-6] (this will place unit in Induction Mode), select highest available frequency (200 kHz) and highest output power level.

•Select the Induction Peak (Ind Pk) mode and 200 kHz frequency on the receiver. When in close proximity to the transmitter in induction mode, there is a direct signal from the induction antenna in the transmitter to the receiver through the air. Induction Peak (Ind Pk) mode is a newly added locate mode for use in closer proximity to a transmitter in Induction mode (<60 ft , 20 m typ.). Special (single) Peak (Spl Pk) would give the highest sensitivity, but is affected by the air signal more than Induction Peak (Ind Pk) mode.

26	78-8130-6150-0 Rev G

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Contents 3M Dynatel Contents Rev G Rev G Rev G Safety Information Intended UseAbout This Manual Transmitter Battery Installation Quick StartReceiver Battery Installation Cleaning Service and Accessories3M Dynatel Transmitter 2273 Keypad and Connector Definitions Rechargeable Battery Maximum Transmitter Output3M Dynatel Receiver 2250M Key Pad and Display Definitions Dynatel3M Dynatel Receiver 2273M Key Pad and Display Definitions Menu Displays Main MenuRev G Rev G Select Depth Units Configuring The ReceiverSetting the Receiver Clock Selecting a LanguageCreating User Defined Frequencies Menu 6 + More SK4 + Setup SK6 + More SK6d + Tone Freq SK6jEnabling/Disabling Frequencies Filtering Power Frequency Interference Selecting Locating AudioBuried Cables And Pipes Transmitter Connections Direct Connect MethodRev G Dyna-Coupler Method Non-Sweeping Passive Induction Mode Locating Induction MethodSweeping Active Induction Mode Locating Passive SweepsOne-person Active Induction Mode Sweeps Two-person Active Induction Mode Sweeps Transmitter Set-upReceiver Modes Locate/OK 5 + Cable/Pipe SK + Mode SK + Dir Pk SK ToggleLocate/OK 5 + Cable/Pipe SK + Mode SK + DirNull SK Toggle Directional Peak Dir PkLocate/OK 5 + Cable/Pipe SK + Mode SK + Spl Pk SK Toggle Special Peak Spl PkDepth and Current Estimate Expanded ModeLocate/OK 5 + Cable/Pipe SK + Mode SK + Ind Pk SK Toggle Induction Peak Ind PkLocating Frequencies Active FrequenciesAuxiliary Frequencies Power FrequenciesPassive Frequencies Locating in Directional Peak Mode Rev G Locating Active Duct Probes Sondes Determining ADP DepthLocating Buried Sheath Faults and Earth Return Faults Transmitter SetupPinpointing the Buried Fault Green Band Enabling/Disabling Marker Types Alert ModeLocating 3M Electronic Markers 3M iD Markers Single Marker Locate Press Locate/OKDual Marker Locate 3M iD Marker DepthPassive 3M Electronic Marker Non-iD Depth Menu 6 + Data/Templat SK2 + User Templat SK2c Creating/Editing Templates for 3M iD MarkersCreating New Templates Rev G Editing Templates Menu 6 + Write Mode SK1 Writing 3M iD MarkersPress Start Write SK Press Menu 6 + Write Mode SK1 Modifying Marker Data to be WrittenRev G Reading 3M iD Markers Menu 6 + Data/Templat SK2 + Read History SK2a Reviewing Marker Read/Write HistoryRead History Write History SK Capturing the GPS Coordinates Capture Mode / ModeGPS Operation Communicating with the GPS DeviceMenu 6 + COM Setup SK3 + GIS Path Mapping with GPSCreating Trace Templates Menu 6 + Com SK3 + GIS SK or PDA SKAerial Faults Toning Additional ApplicationsConnection Diagrams Cable IdentificationHelp Mode Menu 6 + More SK4 + Help SK8Self Test Of Receiver Menu 6 + More SK4 + Self Test SK7Product Description Product Description And Optional AccessoriesStandard Configurations Direct Connect Cables Earth Contact FrameOptional 3M Accessories for 3M Dynatel Locators Receiver Specifications SpecificationDetection Depth 3M Non-iD Passive Transmitter Specifications Mode can display a fault resistance up to 10M ΩEnvironmental and Regulatory Specifications Rechargeable Battery InformationRev G Electrical Markets Division Important Notice