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78-9000-0192-2 Rev C 37
Step 18. Measure the Depth and Current occasionally to verify target path.
Note: In order to measure the Depth and Relative Current accurately, the operator
must pinpoint the target pipe or cable, and the receiver handle should be in-line with
the target path.
− While in Dir Pk mode, find the highest Signal Strength [9] ([8] for 2550
locator).
− Lower the tip of the receiver to the ground. Twist the receiver left and right
while watching the Signal Strength [9] ([8] for 2550 locator).
− When the highest reading is displayed, the handle of the unit is in line with
the target pipe or cable.
Occasionally a signal will appear on adjacent cables or pipes. Compare the
relative and actual current readings (value that is under the relative current
value and in mA units) over each path to help determine the target path. Current
readings will be significantly less on the adjacent cable/pipe compared to the
target path.
Step 19. As tracing proceeds, remember that the most powerful signal is near the
transmitter. As the receiver gets farther away from the transmitter the Signal
Strength [9] ([8] for 2550) decreases. It may be necessary to readjust the gain
as needed to be sure there is adequate signal for the receiver to operate. Press
the Gain [3] up or down when the Bar Graph [11] ([10] for 2550 locator) is
no longer visible (too little signal) or when the Bar Graph [11] ([10] for 2550
locator) is closed (too much signal).
Step 20. Trace the path until you reach a logical termination point (i.e.: terminal, meter,
cabinet, etc).
11. Locating Active Duct Probes (Sondes)
Step 1. Press On/Off [1] on the receiver.
Step 2. Press Menu/OK [5] (you may have to press Menu/OK [5] twice to toggle to the
LOCATE MENU display).
Step 3. Press Cable/Pipe [SK].
Step 4. Press Mode [SK Toggle] to select Special Peak (Spl Pk).
Step 5. Press Freq [SK].
Step 6. Press Active [SK Toggle] to select the 33kHz frequency (for a 33 kHz Sonde
or ADP (Active Duct Probe)).
Step 7. Press Menu/OK [5].