B. Power Frequencies

Power frequencies refer to 50 or 60 Hz signals, and their harmonics, that can be traced without the use of a transmitter.

60:Best for general locating of passive power.

60H (high harmonic): If the 60 choice appears to be responding slowly, or poorly, then 60H is the second choice for locating of passive power.

60L (low harmonic): Third choice for passive power locating. May be used when 60 or 60L is weak or erratic. 60L may be the best choice when locating primary power cables.

120 Hz: Used for locating rectified AC power signals, often found on pipelines using impressed current cathodic protection.

1.Press Locate/OK [5]

2.Press Cable/Pipe [SK]

3.Press Freq [SK]

4.Press Power [SK Toggle] until the desired frequency is displayed in the soft key command [9] (“Power” 60, 60L, 60H, or 120).

5.Press Locate/OK [5] to return to Locate mode.

All U.S. receivers default to 60 Hz.

To set the receiver to detect 50 Hz signals refer to Enabling/Disabling Frequencies section of this manual.

C. Passive Frequencies

The receiver (without a 3MDynatelTransmitter 2200 Series) can be used to detect some CATV cables (31.5 kHz). (A horizontal-scan television NTSC must be turned on to generate this frequency.)

1.Press Locate/OK [5]

2.Press Cable/Pipe [SK]

3.Press Freq [SK]

4.Press Pasv [SK Toggle]

5.Press Locate/OK [5] to return to Locate mode.

D. Auxiliary Frequencies

Auxiliary frequencies are signals generated from remote location transmitters, or frequency generating transmitters.

1.Press Locate/OK [5]

2.Press Cable/Pipe [SK]

3.Press Freq [SK]

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3M 2250M-iD, 2273M-iD manual Power Frequencies, Passive Frequencies, Auxiliary Frequencies