The first section of the cable tester function introduced
Cable fault tester is to meet the industrial-grade power industry program and the rapid development of the IT era, the original cable fault tester limitations, with the embedded computer platform system, network services, USB communication technology system, greatly improved The use of the instrument functions and the use of value and convenient on-site environment, especially for the growing number of buried cable data provides a unique set of management software.The entire system to meet the People's Republic of China power industry standard "DL / T849.1 ~ DL / T849.3-2004 "special equipment for power equipment special test equipment, the system test by the system host and fault locator and cable path meter composed of three parts for the power cable fault test, cable path, cable buried depth And the daily maintenance and management of cable archives, as well as accurate testing of open circuit and short circuit faults for coaxial communication cables and local telephone cables.
◆ China's first use of industrial embedded computer platform system, the entire system of lithium power supply, easy to carry, easy to test.
◆ China's first 10.4 / 12.1-inch large-screen touch system (both optional), the entire computer XP operating platform integrated software, completely bid farewell to the cable meter era, and with cable fault test software and cable data management software.
◆ using the latest USB communication interface, the acquisition signal stability, the host automatically select the sampling frequency, both to improve the test accuracy, but also to meet the requirements of different lengths of cable testing.
◆ software to achieve fault manual card bit, distance automatic display, double cursor movement can be accurate to 0.15 meters, improve the test accuracy.
◆ powerful waveform processing functions and network services, test the waveform can be compressed, extended, with the screen random display two more close to the standard waveform for you to accurately compare and reduce the error.
◆ Optional a wireless network card, wireless Internet access anytime, anywhere to provide technical services to the user on-site testing to provide timely and accurate waveform analysis and guidance, like expert guidance, so that you worry-free work.
◆ 10G memory multi-class field waveform and on-site physical wiring diagram, you can use a little light, cable data management software can do the perfect cable file management for the cable maintenance work and precise positioning to provide reference and help.
◆ key precision fixed-point instrument part, imitation of German technology, direct digital display testers from the point of failure, is the same kind of fixed-point technology innovation, fast and accurate to find cable failure, reduce power loss provides a strong guarantee.
◆ The latest development of intelligent modular sampler, replacing the cumbersome field wiring, with waveform intuitive, easy to analyze, and completely isolated from high pressure, the host, the operator is absolutely safe features.
First, the tester technical indicators:
1, Can test a variety of different voltage levels, different cross-section, different media and various materials of various types of power cable failure, including: open circuit, short circuit, low resistance, high resistance leakage, high resistance flashover fault.
2, Can measure the length of any known cable in the wave propagation speed.
3, Can test the cable to the depth and depth.
Test distance: Not less than 40km Minimum Test Distance (Blind Zone): 2-5 meters
Precise fixed point error: ± 0.2m Test error: System error less than ± 1%
Resolution: V / 50m; V for the transmission speed m / μs; software cursor 0.15 meters. Instrument sampling frequency: 6.25 MHz, 10 MHz, 25 MHz, 80 MHz, (adaptive pulse width)
Power and power: AC 220V ± 10% 10W; DC 12V (7AH) is not more than 20W
Standby time: Can be used continuously for about 5 hours.
Management: Detailed information on all cables in the user management area: including cable distribution, number, start position, depth and time of embedding, cable media, joint position, maintenance log, cause of failure, test report, cable test record and other information.
two, Path meter technical indicators
Signal frequency: 15KHz sine wave output power: Pomax ≥ 100W
Output impedance: Zo = Zc (cable characteristic resistivity) Oscillation mode: intermittent
Host weight: 8.5kg Ambient temperature: - 10 ℃ ~ +40 ℃
Dimensions: 180mm × 300mm × 400mm Relative humidity: RH ≤ 85% (25 ℃)
1, the output socket: The instrument uses an air outlet to test the signal output of the cable fault.
2, the output range: Used to adjust the input and output pulse amplitude size. Use should be adjusted according to the screen display waveform. Adjust too small, the pulse reflection is very small, or even can not be sampled. Adjustment is too large, the reflection pulse connected with the baseline no intersection and even the baseline will change Into the slash. General sampling before the input amplitude knob rotation 1/3 or so, and then according to the size of the sampling waveform and then adjust, re-sampling.
Section II cable fault tester details
First, the system composition
The cable fault tester consists of test host, path signal generator, path signal receiver and positioner and other components.
Fault test host includes integrated computer, low voltage pulse generation and data processing, used to test the distance of the fault can also be used to measure the length of the cable and the wave propagation speed in the cable.
The path signal generator generates an intermittent sine wave signal with a frequency of 30 kHz and a maximum amplitude of 30 V for finding the cable path.
The path signal receiver is used to receive the path signal for finding the cable orientation and estimating the depth of the cable buried.
The positioner is used for precise positioning of the fault point.
Second, technical performance
1, fault test system
● can test a variety of power cables of various types of failures and coaxial communication cable and the local telephone cable open, short circuit failure.
• The speed at which radio waves can be measured in any cable of known length.
● Test distance: not less than 16 km
● System error: less than 1 meter
● Sampling frequency: 25MHz
● Minimum resolution: 0.2 m
● Test dead zone: less than 16 meters
● Power supply: DC 12V (maintenance-free battery)
● Weight: 5Kg
2, the path signal generator
● Output signal frequency: 30KHz
● Oscillation mode: intermittent
● Output power: 30W
● Power supply: 220V ± 10%
● Weight: 4Kg
3, locator
● Test sensitivity: 50Ω internal resistance of the signal source output 300Hz signal, fixed-point instrument to maintain the output is 2V, the signal is better than 20: 1 case of the input signal is not greater than 10μv.
● Input impedance: not less than 1.2KΩ.
● Use 2 × 2000Ω headphones.
● Working voltage: DC9V ± 10%.
● Ambient temperature: -20 ℃ ~ 70 ℃