3M 2273M Benutzerhandbuch

 32 

78-8130-6150-0 Rev G

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 3M

™

 Dynatel

™

 Transmitter 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]