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Low Insulation Battery/Earth/Fault/Locator

Description | Features | Operation | Specifications


Low Insulation Faults can not be detected by normal TDR method but needs special technique. This machine is used for location of Low Insulation / Battery/ Earth faults. One good pair & one faulty pair are connected to the unit. The good pair is shorted at the far end. One leg of the faulty pair is connected to the good pair at far end. The unit indicates the distance of the good pair & the distance to the fault (in meters). Unit is chargeable battery operated.


  • Battery operated, light weight
  • Easy to use operation
  • Direct measurement
  • Use of high speed circuitry
  • Digital display
  • Very low power requirement
  • Capable of giving more than five hours of uninterrupted working
  • Built in battery charger
  • Improved minimum and maximum fault location ranges
  • Tests any type of telecom cable
  • Low insulation fault distance measurement with bridge method
  • Low battery indication


Pairs are tested first on MDF Test board & then one of the good pair out of it is connected to the machine. It is looped at far end. Similarly faulty pair (of low insulation / Battery / Earth type fault) is connected to this machine. Its far end is looped to good pair at same far end spot. Good pair distance is entered into the machine. In Null made Null pot is set to get 0 reading on display. Then In DF X1 mode we get direct distance of fault in meters.


Fault Distance Ranges15 km
Measurement ModesDirect reading
Accuracy± 0.5%
Pulse Width500 msec
Pulse Amplitude30 V Pulse modulated
Cable Constant (VOP) Range70 to 99
Display ReadoutDigital
Power Supply12 V rechargeable battery 2.5 Ah capacity
Weight1.2 kg
Dimensions200 mm x 175 mm x 70 mm
AccessoriesOperation/Service manual, Mains cable, Testing leads, Carrying case
Environmental Spec.Operation: 0 C to 50 C, Storage: -10 C to 60 C
Working Temperature0 C to 55 C