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Introduction:

 
 
 

The instrument is used to pinpoint the cable faults and can be also used as cable route tracer. The instrument is designed for maximum sensitivity.

 
General Description:
1)
Acoustic Pick-up and sensor : This unit converts the seismic distrubances generated at a fault point because of high energy dissipate by a surge generator/Thumper. The sensor is electrically screened to avoid the effect of external noise. Sensor has an extension handle to facilitiate moving and placing it along the cable route.The sensor base is designed for maximum sensitivity using a tripod arrangement.
2)

Amplifier Unit : Acoustic and magnetic amplifier are housed in seprated screened compartment. These amplifier units have seprarate gain control and display meter to indicate the strength of the input signal.


3)
Head Phones : The high impedance,'Philips'make head phones with excellent LF response are used.
 
 
Extra Features :The instrument has the facility to mute the acoustic. It is required when vehicles/ people passing by, disrubs the operator. The instrument is battery operated having separate batteries both of display of 'magnetic' and acoustic' VU-meter deflection. The batteries are operational only when plug for magnetic/acoustic is engaged in a well-designed female socket in-built,in the receiver.
   
  Techncial Specification
   
  ACOUSTIC AMPLIFIER
 
Signal Input : Balance from Acoustic Pick-up
Supply Voltage : 9 Volts DC
Supply Current : No. Signal:4mA
Controls : Gain control and Muting Switch
Indication :

*Acoustic signal via Headphones

    *Meter indication proportional to signal level
Batteries : 2x9 V Eveready or Equivalent
 
MAGNETIC AMPLIFIER
Supply Voltage : 9 Volts DC
Supply Current : No.Signal:4mA
Controls : Gain Control
Indication : *Acoustic signal via Headphones
  : *Meter indication proportional to signal level
 
ACOUSTIC PICK-UP
Connecting Cable : 1.5 meter terminated by a 6 pin DIN plug
 
HEADPHONES
Impedance : 32 Ohms
Connecting Leads : 1.5 meter terminated by a 5 pin DIN plug
     
TOTAL WEIGHT OF AMPLIFIER UNIT & ACOUSTIC PICK-UP : 3Kg.(Approx.)
Designed by : SME