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78-8130-6151-8 Rev G
9. Locating Frequencies
A. Active Frequencies
Active frequencies are trace signals supplied by a 3M
™
Dynatel
™
Transmitter 2200
Series (577 Hz, 8 kHz, 33 kHz, or 133 kHz).
1. Select the same frequency that the transmitter is generating
2. Press
Locate/OK
[5].
3. Press
Cable/Pipe
[SK].
4. Press
Freq
[SK].
5. Press
ACTIVE
[SK Toggle] until the desired frequency is displayed in the soft key
command [9] (“Active” 577, 8K, 33K or 133K).
6. Press
Locate/OK
[5] to return to Locate mode.
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.
50:
Best for general locating of passive power.
50H (high harmonic):
If the 50 choice appears to be responding slowly, or poorly, then
50H is the second choice for locating of passive power.
50L (low harmonic):
Third choice for passive power locating. May be used when 50 or
50L is weak or erratic. 50L may be the best choice when locating primary power cables.
100 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” 50, 50L, 50H, or 100).
5. Press
Locate/OK
[5] to return to Locate mode.
All export receivers default to 50 Hz.
To set the receiver to detect 60 Hz signals refer to
Enabling/Disabling Frequencies
(Section 5D) of this manual.
C. Passive Frequencies
The receiver (without a 3M Dynatel Transmitter 2200) 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].
