Features
To Trace Route of the Buried Cable upto 10 Km. Measurement of Depth of Lay of Cable. Identification of Particular Cable from Bunch in Telecom Cables. Ground Survey.
Principle of Route Location
The system consists of an Audio Frequency Transmitter AFG 8, Audio Frequency Receiver AFR 4, Universal Search Coil SC 4, Transmitter Coil TC 8, Cable Identification Probe CIP-3 and Headphones AH1.
The transmitter injects an A.F. signal into the cable which generates an electromagnetic field around it. This field is concentric to the cable & is present over the entire length. The presence of this field (in turn the cable) is detected by a highly selective and sensitive receiver with a search coil.
Availability of three frequencies 480Hz, 1450Hz and 9820Hz enables to use correct frequency depending on cable length, depth and external interference. Use of 9.82kHz permits operation on a working cable as the frequency does not interfere with normal operations. Using the maximum or minimum of the injected signal routes can be traced for cables up to depth of 5 metres. Bends, loops and tree branches also can be traced. Route of cable running in a bunch of cables and then branching off can be determined.

Determination of Depth of Lay of Cable

Once the route of the cable is traced it is necessary to know the depth at which the cable is laid under the ground. This helps to avoid any damage to the cable while digging. The depth of the cable can be determined by using the same equipment.

Cable Identification

After pit is dug a particular (required) cable from bunch of many cables can be identified with the identification probe CIP-3 used with AFG 8 transmitter and AFR 4 receiver.

Technical Specifications
AUDIO FREQUENCY GENERATOR - AFG8
Output	1-2-4-8 Watts selectable.
Output Frequencies	480Hz - 1.45kHz - 9.82kHz selectable (All frequencies quartz-controlled).
Matching	Matching of the output impedance of the connected cable is carried out in the range 0.5…1000 Ohms.
Indication	Meter indication of – relative transmitted power and charging condition of the accumulators.
Current Supply	Mains connection 230V AC 50Hz, or 12V DC (e.g. car battery) or from built-in accumulators with charging unit.
Operation Time	2.5 hrs. (8W) continuous operation with fully charged accumulators. In case of lower battery drain or intermittent operation, the operating time will be correspondingly longer.
Dimension	255 x 135 x 255 mm.
Weight	4.9 Kg. (approx).
AUDIO FREQUENCY RECEIVER - AFR4 with Active Filter Circuit
Receiving Frequencies	50Hz - 480Hz - 1.45kHz - 9.82kHz.
Gain	Broad-band 100…7000Hz greater than 90dB.
Indication	LCD indication of signal modulation and battery check; recording of the peak value (during acoustic measurement) for approx. 2 seconds.
Dimensions	240 x 155 x 110 mm.
Weight	1.6 Kgs. (approx) with batteries.
UNIVERSAL SEARCH COIL - SC4
Receiving Frequencies	(50Hz-480Hz) - 1.45kHz - 9.82kHz switchable.
Axis of Coil	Can be swiveled 45º/90º.
Dimensions	470 x 80 x 207 mm.
Weight	1.05 Kg. (approx).

Other Models Available
Model Nos.	Power Output
CRT50	5 - 25 - 50 Watts.
CRT200	5 - 50 - 100 - 200 Watts.
CRT500	500 Watts.
PSFI	Power Separation Filter to connect 240V Live Cable.
Apart from locating the exact route of cable, the above models are used for pinpointing the short type of cable faults in power cables.