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78-9000-0192-2 Rev C 23
2. 3M™ Dyna-Coupler Method
! WARNING
This WARNING applies to the following 3M Dyna-Couplers;
• 3" (75 mm) - Part number 3001
• 4.5" (114 mm) - Part number 4001
• 6" (150 mm) - Part number 1196
• All accessory kits containing any of the listed Dyna-Couplers - Part numbers 3019, 4519,
1196/C
A potential for electrical shock exists when using the Dyna-Coupler on cables energized with
electrical power. Use appropriate safety procedures.
DO NOT USE ON CABLES CARRYING IN EXCESS OF 600 VOLTS RMS.
Use a ground extension cable,
or wire, and ground rod set-up
between a target pipe/cable and
a gas meter valve/box, or cable/
electrical meter box. This will isolate
the locate signal to the target pipe/
cable section below the meter/box,
between the grounding points. This
provides a good return path for the
tracing signal. Insulating coupling
above a gas meter valve on a pipe
will isolate the returning signal from
ground and may make locating
more difficult.
• Connect the Dyna-Coupler to the transmitter Output Jack [T-6] using the coupler
cable (9011).
• Clamp the Dyna-Coupler around the cable or pipe, below any bonds, just before it
enters the earth. The jaws of the coupler must fully close.
• Press Trace [T-3] to turn on the transmitter. Press again to select 8 kHz, 33 kHz,
82 kHz or 200 kHz.
Note: When using a Dyna-Coupler, always select high, or maximum, output power
level by pressing Output Level [T-5] key on the transmitter.