Locating Active Duct Probes (Sondes) - 3M Dynatel 2250M Series Operator's Manual

Locating Active Duct Probes (Sondes)

Turn the Receiver on [1].
Press Locate [5]
Press Cable/Pipe [SK].
Press Mode [SK Toggle] to select Special Peak (SplPk).
Press Freq [SK]
Press Active [SK Toggle] to select the 33kHz frequency (for a 33 KHz
Sonde or ADP)
Press Locate [5].
With the receiver handle perpendicular to the conduit path, locate the ADP
position by moving along the path until the strongest signal is found. Adjust
Gain Up/Down [4] when the bar graph remains either fully open or fully
closed.
Refer to the ADP operating instructions for further information.
Determining ADP Depth
Place the tip of the receiver on the ground directly above the located ADP
position.
Maintain the handle orientation perpendicular to the target path.
Press Depth [SK] in the Press Sonde Depth [SK] to
Locate Screen. read ADP Depth
The depth to the ADP is displayed in units, as specified in the receiver set
up menu.
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