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TDR.850A Time Domain Reflectometer
Introduction to the TDR.850A:

TDR Low current impulse method: apply to the locating of the low resistance fault. Short circuit fault, open circuit fault. It also can be used in the measurement of the cable length, the intermediate joints, T joints, and cable termination joint.

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ICM/Decay Impulse current method: apply to the high resistance fault, breakdown fault. Use the current coupler to gather signal from the earth wire, it allows the user to be a safe distance from the high voltage source.

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ARM Arc reflection method available on TDR.950 model​

  • Light, compact and easy to operate

  • Main unit for the tried-and-tested pre-location method

  • Compliant with the following standards GB/T 18268,1, DL/T849,1-2019 & JJF1042-2020.

The TDR.850A:
Technical Specifications

Pulse Voltage:

  • 0-300V±15%

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Pulse Width Range:

  • 0.15µS – 10µS

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Voltage-Proof:

  • Up to 400V CAT IV, 50/60 Hz

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Output Impedance:

  • 0 – 50 Ohm

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Input Signal Gain:

  • 0 – 75 dB

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Measurement Range:

  • 0 - 120 km

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Accuracy:

  • 0.1%

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Sampling Rate:

  • 400 MHz

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Resolution:

  • 0.07 m (at v/2 = 80 m/μs)

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Velocity of Propagation (v/2), Adjustable:

  • 50 – 220 m/μs

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Storage Capacity:

  • 8000 LV pulses

  • 250 Flashover waveforms

Communication Interface:

  • USB

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Display:

  • 10.1” TFT, Colour Touch Screen

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Battery Type:

  • Li-ion rechargeable batteries (7.4V)

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Battery Life:

  • Approx. 6h continuous use

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Charger:

  • 110 – 240 VAC, 50/60 Hz

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Operating Temperature:

  • -20℃－+65℃

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Humidity:

  • 5-90％RH

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Elevation:

  • <4500m (750±30mmHg)

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Dimensions (W x H x D):

  • Approx. 284 × 168 × 358mm

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Weight:

  • Approx. 4.7 kg

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Degree of Protection:

  • IP65 Case

Key Features

  • Fully automated measurement and display of the fault distance

  • Test ranges: 100m/300m/500m/1km/3km/5km/10km/25km/50km/100km

  • High measurement resolution thanks to the 400 MHz sampling rate

  • Simple, interactive menu navigation in several languages

  • Touch screen and press key operation

  • Touch operating screen with smart gesture operation

  • Support cursor drag-drop function and double-click function, easy to locate

  • Simple function menus with high performance

  • Large LED touch screen for ease of use

  • Large 10.1-inch colour touch screen for easy operation with a 1024x600 resolution

  • Waveform storage and PC communication

  • Software management, backup and restore in device

  • Waveform storage and communication with computer

  • Internal storage of waveform

  • Mini printer for waveform printing

  • Support connection with PC or laptop

  • Backlight weakens if no operation in 2 min and power off in 10 min if not operational

Included accessories
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