TDR-420
Catalog index: WMGBTDR420
Reflectometer
Diagnose faults with TDR-420
The TDR-420 reflectometer is a handy digital Time Domain Reflectometer (TDR) designed to characterize and locate faults in power and telecommunications cables. The Sonel TDR-420 reflectometer allows to measure the length of the cable and to determine the distance to the damage or impedance change in the range from 4 to 6000 m in cables with metal conductors. The shortest measuring range of 7 meters and the dead zone of 0.6 m allows user to locate a damage in a very short distance from the connection point of the device.
Product features
- fault location in power and telecommunication cables
- two independent cursors to indicate two fault locations and the distance between them
- fault location in coaxial cables
- fault location in infrastructure cables
- detection of breaks, short-circuits, damage caused by moisture and other changes in cable impedance
- graphic presentation of cable faults with an indication of the distance to the fault on the display
Application
TDR-420 time-domain reflectometer is designed to detect where faults in metal wires are. This product is designed for:
- electrical wholesalers and cable dealers,
- electrical installation companies,
- maintenance personnel at manufacturing plants,
- building personnel.
This device meets the expectations of all those who have to accurately locate a fault and wire end in either power or telecommunications cables.
Device capabilities
SONEL reflectometer is distinguished for their long operating range of up to 6,000 m, very low margin of error in measurement (in the order of 1%) and the ability to adjust both the velocity of propagation and the impedance of the cable which is under investigation. By using two cursors there should be no problem with determining both the distance to two faults and the distance between them.
Easy readout
The TDR-420 reflectometer is equipped with a readable colour display that, due to its 320 x 240 pixel resolution, allows the fault location to be indicated even more accurately.
Integrated Help
In the TDR-420 device a handy help function has been added to facilitate the interpretation of the result obtained during measurement. Thanks to this function, a user can quickly determine the type of anomaly that is present in the cable segment which is being examined, by comparing the displayed reflectogram with typical fault shapes.
Durable and practical casing
In response to the customers needs the new TDR-420 model has been designed to operate in difficult environmental conditions. A unique casing with the IP67 ingress protection rating ensures that the device is both waterproof and dustproof. An additional advantage is the elastomer coating of the casing that prevents the device from slipping out of the hands and provides protection if it should be accidently dropped.
Specification
Product features
- Possibility damage-free location of impedance changes of tested cables and wires such as:
- shorted conductor,
- open conductor / end of cable – useful during the inventory of warehouses and stores,
- splice,
- splitter,
- water ingress,
- wet splice,
- bridge tap
- or other changes.
- Single measurement mode ONCE,
- Continuously measurement mode CONT,
- Tone signal generator TONE,
- Two cursors to mark two places of damage along with an indication of the distance between them,
- Built-in HELP function for easier interpretation of the reflectogram,
- 11 available measuring ranges from 7 m to 6000 m,
- „dead zone” limited to 0.6 m,
- Color 3,5” LCD TFT display with resolution 320 x 240 pixels,
- manually set of sensitivity in 8 steps GAIN,
- output impedance regulation up to 200 Ω (possibility of measuring pre-insulated pipes),
- Velocity of Propagation set in range from 10% to 99%,
- tight and durable housing with IP67 ingress protection degree.
- Small size and weight.
Technical specification
- Measurement ranges: 7, 15, 30, 60, 120, 250, 500 m, 1, 2, 3, 6 km / 20, 45, 90, 180, 360, 750, 1500, 3000, 6000, 10000, 20000 ft
- Accuracy:1% of selected range
- Resolution: Approx. 1% of selected range
- Min. Cable length: 4 m / (14 ft)
- Velocity of propagation VoP: Adjustable from 10 to…99% or 15…148,5 m/µs
- Output Pulse: 5 Vp-p (open circuit)
- Output Impedance: 25, 50, 75, 100, 120, 200 Ω
- Output Impedance: 3 ns…3 µs (depends of range)
- Scan rate / mode: Up to 3 scans / second (CONT) or single (ONCE)
- Tone generator: 810 … 1110 Hz
- Battery Life: Up to 8 hours of continuous scan
- Power supply: 4 x alkaline batteries 1.5 V type AA or 4 x rechargeable batteries NiMH AA
- Auto-OFF: 1, 3, 5, 10, 15 minutes or deactivated
- Display: Color 3,5” LCD TFT, 320 x 240 pixels
- Voltage protection: 400 V DC / 250 V AC
- Dimensions: 220 x 98 x 58 mm (8.7 x 3.9 x 2.3 inches)
- Weight: 487 g
- Electromagnetic standard compatibility EMC: EN 61326-1
- Water/ Dust Proof: IP67
Nominal condition of use
- Operating temperature: -20..+70°C
- Storage temperature: -30…+80°C at humidity <80%
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