3M Advanced Cable Locator 2250 User Manual

August 2014
78-8097-6518-9 Rev D
3M™ Dynatel™
Advanced Cable 
Locator 2250
3M 

Table of ConTenTs
Introduction ........................................................................\
........................ 2
Installing or Replacing the Batteries  .......................................................... 2
Initial Receiver Configuration  .................................................................... 3
Receiver Battery Test ........................................................................\
......... 3
Transmitter Battery Test...

InTroduCTIon
The 3M™ Dynatel™ Advanced Cable Locator 2250 consists of a Transmit-
ter and a Receiver for locating buried cables or Active Duct Probes (sondes).  
It also measures and pinpoints conductor faults in aerial cables.  The 
Transmitter provides four frequencies to accommodate varying factors such\
 
as distance, cable type, or soil conditions. If desired, all four freque\
ncies 
may be transmitted at once.  The Transmitter also provides a separate Tone 
function for identifying cables and...

InITIal reCeIver ConfIguraTIon
Display depth units (inches, feet and inches, or centimeters) may be c\
hanged 
while holding 
 and pressing .  For each press, one of three units 
will display. To change the passive Power frequency, press and hold 
 
then press 
 to toggle between 50 or 60 Hz as displayed in the lower 
left corner of the display.
To change the Null bar graph display mode, press and hold 
then  
press  to toggle between normal Null bar graph display (Null flag will 
flash) and inverse Null...

TransMITTer baTTery TesT
To test the Batteries, press and hold .   Listen to the tone and watch the 
display.
    • solid tone and 'OK' indicates batteries good;
    • beeping tone and 'LO' indicates batteries low;
    • no tone and '- -' indicates replace batteries. 
Note:   The battery test indicates battery condition for normal output levels.  
If the unit resets when the high output level is selected, use the normal out -
put level or replace the batteries.
usIng exTernal dC...

loCaTIng a burIed Cable
Transmitter setup
Perform a battery test and then connect the Transmitter using one of the 
three methods below to put tracing signal on a cable.
Note:  Key descriptions can be found inside the Transmitter lid. 
DaNger!
Voltage greater than 240 volts will damage equipment and cause personal 
injury and death.  Make all direct test connections before turning on the 
Transmitter.  Then activate the Transmitter in the Ohms mode and check 
the display for voltage readings.  Follow...

Make sure the Transmitter is off. Plug the direct connect cable into the front 
panel jack.  Connect the Black clip to the ground rod.  Place the ground rod 
in the earth perpendicular to the suspected cable path.  If necessary, extend 
the black lead with the Ground Extension Cable.  Next, remove the ground\
 
bonding and attach the Red clip to the shield.
Press 
 to turn the Transmitter on in the Ohms mode .  It will mea-
sure the continuity of the cable under test.  The results are displayed in ohms...

Press  to select Trace mode.  Press again to select one or all of the 
four frequencies. The display will alternate between displaying the selected 
frequency and the output signal current.  It is best to choose the lowes\
t 
frequency for direct connect with far-end ground and a high frequency for 
direct connect with no far-end ground.
Press 
 to  select high output level for longer tracing distances and 
deep cables.     
Transmitter setup is finished, now go to  LoCatiNg a BurieD CaBLe 
- 
ReceiveR...

3M™ dyna-Coupler Method
Cable Path
Connect the Dyna-Coupler to the Transmitter front panel jack using the 
coupler cable.  
Clamp the Dyna-Coupler around the cable below any bonds just before the 
cable enters the earth. The jaws of the coupler must fully close.
Press  to turn Transmitter on. Press again to select 8, 33, or 200 kHz.
Select high output level by pressing  . 
 Transmitter setup is finished,  now go to LoCatiNg a BurieD CaBLe  
- ReceiveR Setup (Page 10).
Page 8 

Induction Method
Place the transmitter on the ground over the target cable with the lid hinge in 
line with the cable path.  Press 
 to turn the Transmitter on.  
Press again to select either 33 kHz or 200 kHz. For greater tracing rang\
e, 
select high  output level by pressing  
.
Note:  If the Receiver is less than 50 feet from the Transmitter, it can pick 
up signal through the air.  For best results, keep the Receiver away from the 
Transmitter by at least that distance.
Transmitter setup is...