TDR-107 – a modern digital reflectometer designed specifically to find and diagnose faults in the power cable lines: open, short, sleeve, cable splice, parallel drainage, wet cable, etc.
TDR-107 reflectometer can be used to search for damage as the pulse method (effective for low-resistance defects), and as part of an electrical laboratory, pulsed-arc method (Arc-Reflection), allows to determine the high-resistance faults to hundreds of megohms.
Purpose
The device TDR-107 is designed for measurements on balanced and unbalanced cables with a characteristic impedance of 25 to 600 ohms using the following methods:
PULSE METHOD (TDR) - the most accurate and safe mode – effective for the diagnosis of low-resistivity damages, searching interruptions and short-circuits:
- cable length measurement;
- measuring distances to the impedance discontinuities or damage;
- measurement of the velocity factor of the line at a certain length thereof;
- determine the nature of injuries.
The effectiveness of the device is significantly increased in the mobile electrical laboratory:
Arc Reflection Technique (Arc-Reflection) – as part of a mobile electrical laboratory can detect high impedance faults with an accuracy of pulse method: the measurement with pulse-arc method on the power cables uses the arc-reflection method that occurs for a short time in high-resistance point of the defect through the use of a high-voltage shock pulse generator. The method does not require the prior isolation burning and particularly effective when working on polyethylene sheath.
Sphere of application
Pulse TDR TDR-107 is used to control when installing or operating the following types of cable lines:
- system Cables Communications;
- signal and control cables;
- power cable;
- aerial cable lines;
- computer Networks;
- television and radio cable line;
- to determine the length of the cable during its manufacture, storage and trade.
Features
- ability to apply two basic modern methods of diagnosis and fault location of cable lines: pulse method and pulse-arc method;
- real time measuring;
- asynchronous interference suppression;
- 5.7 ” display with a resolution of 320×240 pixels;
- non-volatile memory for 100 traces with the digitization of all measurement parameters;
- pointwise subtraction mode to show only differences;
- maximum range – 50 km;
- compare mode with a trace from the device memory;
- preview mode waveforms with text notes from memory;
- built-in table velocity factor of 200 values, with the possibility of replenishment;
- PC data exchange;
- splash proof hermetical body with high mechanical strength (protection class IP67);
Specifications
| Measurement Modes |
|
| Monochrome LCD display | 5.7″ (320×240 pixels) |
| Range measuring distance (delay time) | from 0 to 50000 m (0 to 500 ms) |
| Sub-bands of distance (time delay) | 0 – 250 m (0 – 2.5 ms), 0 – 500 m (0 -5 ms), 0 – 1000 m (0 – 10 ms), 0 – 2500 m (0 – 25 ms), 0 – 5000 m (0 – 50 ms) 0 – 12500 m (0 – 125 ms), 0 – 25000 m (0 – 250 ms), 0 – 50000 m (0 – 500 ms) |
| Distance instrumental error | from 0.04% to 0.4% depending on subband measurements(From 1 m to 20 m, depending on the measurements subband VOP = 1.50) |
| The effective sampling rate | 100 MHz |
| Range concerted resistance | from 25 ohms to 600 ohms |
| Probe pulse duration | from 10 ns to 100 ms |
| The amplitude of the probe pulse | 10 a matched load |
| The sensitivity of the receiving path | better than 1 mV |
| The dynamic range | not less 80 dB |
| The setting range of the velocity factor | VOP = 33.3% … 99.9% (step 0.1%) |
| Time delay adjustment range (pulse-arc method) | from 0 to 4 ms (step 0.2 ms) |
| Synchronization (pulse-arc method) |
|
| Continuous battery operating time | at least 8 hours |
| Time of continuous operating time through the charger | unlimited |
| Dimensions | 70x246x124 mm |
| Operating temperature range | from -20 °C to +40 °C |
| Weight with a battery | not more than 2.5 kg |