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CablePipeFault Advanced Locator 2250M2273M Series User Manual

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Page 31

78-8130-6150-0 Rev G 31
 
− There are two options for measuring depth. 
Live depth is a continuous measurement. 
1-Shot Depth is an averaging of the depth 
reading over a short period of time. When in 
1-Shot mode, the unit will average the depth 
reading for three seconds, and then display 
the result on the display. Press Depth [SK] to 
alternate between the two modes.
 
− Five depth readings can be saved with the 
time, date and relative current measurements.
3.  Pressing  Save [SK] will place each...

Page 32

 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...

Page 33

78-8130-6150-0 Rev G 33
4. Press  Aux [SK Toggle] until the desired frequency is displayed in the softkey 
command [9] (“Aux” 512, 560, 333 Hz, or user defined frequencies).
5.  Press  Locate/OK  [5] to return to Locate mode.
10. Locating in Directional Peak Mode
The following are instructions for locating a buried pipe or cable using the direct connect 
method and the directional peak (Dir Pk) mode. Other methods of connection and 
tracing modes/features are explained in previous sections.
1.  Insert...

Page 34

 34 78-8130-6150-0 Rev G
12. Set the Frequency and mode of the receiver.
a. Press  Freq [SK]
b.  Select the same frequency on the receiver 
as the transmitter by pressing Active  [SK 
Toggle].
c.  Press  Locate/OK  [5] to save the setting and 
return to locate mode.
d.  Press  Mode  [SK Toggle] until Dir Pk is 
displayed.
13.  Stand away from the suspected target path and adjust the Gain  [4] down until the 
bar graph opens completely.
14.  Walk in a wide circle with your back toward the transmitter...

Page 35

78-8130-6150-0 Rev G 35
Note: In order to measure the depth and 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 [10].
 
− Lower the tip of the receiver to the ground. Twist the receiver left and right 
while watching the signal strength.
 
− When the highest Signal Strength [10] reading is displayed, the handle of the 
receiver is in line with the target...

Page 36

 36 78-8130-6150-0 Rev G
4. Press  Sonde Depth [SK] to read ADP Depth
 
− The depth to the ADP is displayed in units, 
as specified in the receiver set up menu.
 
− Five Sonde depth readings can be saved 
with the time and date measured. Press Mem 
Select [SK] after the Sonde depth displays.
 
− Press Mem Select [SK] to select a specific 
memory location (M1-M5) or select Save 
[SK]. Save [SK] will place each entry in 
sequential order in memory (M1–M5) until 
five readings have been stored. The unit...

Page 37

78-8130-6150-0 Rev G 37
5. Press  on: Ohm-meter/Fault Locate/Tone [T-2] to turn the transmitter on and place 
the transmitter in Ohm-meter mode.
 
− The resistance of the fault will be displayed in ohms on the transmitter Digital 
Display [T-4].
 
− Resistance less than 50KΩ = Significant fault exists
 
− Resistance 50KΩ to 1.0MΩ = High resistance fault exists (May or may not 
cause problems yet, but gets worse with time.)
 
− Resistance greater than 1.0MΩ = No significant fault exists
Note: The fault...

Page 38

 38 78-8130-6150-0 Rev G
7. Continue along the cable path, re-inserting the 3M™ Earth Contact Frame probes 
every few steps while watching the receiver bar graph. The bar graph on the 
receiver will fill toward the right side of the display (green Fault Finding Direction 
Indicator [13] (See illustration below)), indicating that the fault is ahead of the 
operator (in the direction of the green-banded leg of the Earth Contact Frame).
Transmitter Signal
Ground Fault location
Green Band...

Page 39

78-8130-6150-0 Rev G 39
10. After a fault is located and pinpointed, move the 3M™ Earth Contact Frame about 
one Earth Contact Frame width away from the fault and insert it in the ground with 
the green-banded leg towards the fault. Compare the numeric signal level with the 
fault level reference signal indicated in the lower left box labeled  Ref. If the reading 
is within 12 dB of the reference signal, the operator has found the major fault. If 
the fault reading does not fall within 12 db of the...

Page 40

 40 78-8130-6150-0 Rev G
 
− The receiver display will add the Alert bar 
graph and the type of marker to the display 
with a prompt to adjust the marker gain.
4.  Press the Gain [4] until only a small mark on 
the marker bar graph is visible.
5.  Press  Locate/OK  [5] to save the marker gain 
setting.
 
− The display will return to Special Peak Cable 
Locate / Alert On.
 
− If the selected type of utility marker is 
detected, a second audio tone will emit from 
the unit and the marker bar graph will...
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