PURPOSE

 UD4-94-ОKО-02 multi-channel flaw detector (as a part of mechanized and automated complexes of non-destructive testing as well) is used for ultrasonic testing of product quality during its manufacture and operation in various branches of industry.

Application fields:

Mechanized and automated testing of:

1. Castings, forged pieces, rolled metals.
2. Welded joints.
3. Pipes during manufacture and used pipelines.
4. Rolling stock of rail transport.
5. End products and  semi-manufactured articles.
6. Objects of nuclear power and thermal power engineering.

 ADVANTAGES OF UD4-94 ОKО-02 FLAW DETECTOR

• application versatility and possibility to form any configuration of NDT multi-channel system on the basis of the flaw detector;
• precise measurements in registering friendly signals and low noise level due to the usage of complex processing algorithms and quality and reliable element base of the instrument;
• instrument control using both the keyboard and the “special scroll”;
• channels quantity increase up to 32;
• flaw detector usage both as a separate NDT system and as a part of stationary NDT system only for acquisition, primary treatment and transfer of data via Ethernet channel in the hardware and computing complex of the system;
• automatic measurement of conditional and equivalent dimensions of discontinuities;
• registration of all testing results and advanced data analysis;
• operation of the flaw detector with max. number of channels from the storage battery – 8 hours.

 DISTINCTIVE FEATURES OF THE FLAW DETECTOR

• lLarge color high-contrast TFT display;
• ALARM system: 16 three-color LEDs, sound alarm;
• convenient menu navigation with the help of a “special scroll”;
• various scanning units manipulation;
• sound comments recording for all types of stored data;
• instrument connection to local computer network Ethernet, USB slave;
• keyboard and PS/2 mouse connection;
• software implementation for different testing tasks: ring welded joints testing, rolled metals testing, thicknesses mapping (corrosive damages) etc.;
• any sounding schemes carrying out in automatic and manual modes;
• automatic plotting of DGS curves for all channels;
• automatic measurement of sound velocity in a testing object and automatic calibration of probe parameters;
• various A-scan display forms: RF /full wave./+half wave /-half wave /Envelope;
• information display forms: А-scan, B-scan, orthogonal views, corrosion map;
• taking account of the real probe position in a scanner for correct processing of testing results when working with scanning devices.

Main specifications
Overall dimensions of the flaw detector without a handle and with one ultrasonic unit and power unit	no more than 320×210×130 mm
Weight of the flaw detector with one ultrasonic unit and power unit	no more than 6 kg
Keyboard	English, Russian
Languages	English, Chinese, Russian
Number of ultrasonic units	max. 4
Number of ultrasonic channels in the ultrasonic unit	8 channels
Connector types	Lemo-00, BNC
Data storage	flash card
Independent power source	NiMH storage battery of rated voltage 12 V and rated capacity 9 А∙h
Operation time	8 hours
Power supply	AC mains with voltage (220 V ± 10%) and frequency (50 ± 1)Hz;
Flaw detector electric power consumed from AC mains	no more than 30 V·А
Time of flaw detector operation mode setup	no more than 1 min.
Display type	NL8060BC21-03 (800×600 pixels)
Screen size (width, height, diagonal)	170 mm × 130 mm, 214 mm
Warranty	1 year
Interfaces
USB Port	USB slave, USB host
RS – 232	available
PS/2	two inputs
LAN	Ethernet 100 Mbit
Trigger I/O	available
Headphones	available
Encoder output	single-coordinate encoder
Main metrological performances
The limits of admissible main absolute error of the flaw detector during the measurement of depth dН  and coordinates , of defects depth	dН    =  ±(0,5+0,02НY) mm  =  ±(0,5+0,02Х) mm  =  ±(0,5+0,02Y) mm
The limits of admissible main absolute error during the measurement of signals amplitudes ratio ∆N at the reception path input in the gain range from 20 dB to 70 dB	∆N = ±(0,2+0,03N) ∆N - main absolute error during signals amplitudes ratio measurement, dB N - numeric value of signals amplitude ratio, dB
Time instability of the flaw detector reception path sensitivity	± 0,5 dB for 8 hours of continuous operation
Protection level in operation	IP 64
Ambient temperature	from minus 100 to +400 °С
Atmospheric pressure	from 84 to 106,7 kPa
Relative humidity	(93 ± 3) % at the temperature 25 ºС
Flaw detector in the shipping package is resistant to the influence of	vibrations strokes with the peak shock acceleration value 98 m/s2, pulse duration 16 ms, number of strokes 1 000±10 for each direction
Flaw detector retains its parameters when it is influenced by electromagnetic interferences which do not exceed the following norms	harmonic interferences of magnetic field in the frequency band from 30 Hz to 50 kHz with the effective value of field intensity from 130 to 70 dB harmonic interferences of electric field in the frequency band from 10 kHz to 30 МHz with the effective value of field intensity 120 dB
Full average flaw detector lifetime	no less than 10 years
Probability of no-failure operation	no less than 0,9 for 2 000 h
Generator
Initial pulse type	short pulse of negative polarity
Initial pulse frequency	from 10 Hz  to 2000 Hz  with a step of 1,10,100,1000 Hz
Amplitude	180 V
Duration	60±10 ns
Rising edge duration	no more than 20 ns
Triggering type	from an initial pulse, from an encoder
Receiver
Gain	from 0 to 100 dB with a step of 0.1, 1, 10 dB
Input signal	no more than 2 V from peak to peak
Input reception path resistance	no more than 300 Ω
Pass band	from 0.2 to 15 МHz at the level of 6 dB
Digital filter	6 standard digital filters with central frequencies 0.4, 1.25, 1.8, 2.5, 5, 10 MHz
Rectifier	radio frequency, envelope
Setups modes
Automatic setups	calibration of time delay in the probe wedge sound velocity measurement in a testing object
Measurements	mm, µm
Testing range	from 0 to 18000 mm, with a step of 0.1, 1, 10, 100 mm at the sound velocity 6000 m/s
Velocity	from 1500 m/s to 8000 m/s, with a step of 1, 10, 100, 1000 m/s
Delay in a wedge	from 0 to 100 µs, with a step of 0.001, 0.01, 0.1, 1 µs
Range delay	from 0 to 6000 µs, at the velocity 6000 m/s, with a step of 0.1, 1, 10, 100 µs
Refracted angle	from 0 to 900, with a step of 10, 100
Cycles/gates
Cycles amount	max. number of cycles 32
Cycle duration	min. cycle duration 0.5 ms
Number of gates in a cycle	max. number of gates 3
Gate start	from 0 to 5000 µs, with a step 0.1, 1, 10, 100 µs
Gate width	from 0 to 15000 mm, with a step 0.1, 1, 10, 100 mm at the sound velocity 6000 m/s
Gate fixation level	from 10 % to 80 % of vertical screen scale
ALARM	When the signal goes beyond the acceptance level, when the signal stays within the acceptance level (screen center)
Measurements in A-scan mode
Displayed parameters	4 measuring parameters are displayed in a status bar
Gate 1	А – amplitude of an echo-signal from a defect in relation to the screen center, dB Δ – acceptance level exceeding, dB S – distance “by the beam” to a defect X – defect depth coordinate, mm Y – defect depth coordinate, mm
Gate 2	similarly to Gate 1
Gate 3	similarly to Gate 1
TCG curve	max. number of points 30 per cycle, dynamic range 100 dB, vertical setup step 1 dB, horizontal – 2 mm
Measurements in B-scan mode
“Raw” B-scan	А – max. amplitude of an echo-signal from a defect in relation to the screen center, dB H – distance “by the beam” to a defect an echo-signal from which has max. amplitude, mm dH – conditional length “by the beam”, mm L – coordinate along the scanning path to a defect an echo-signal from which has max. amplitude,  mm dL  – conditional defect length, mm
Orthogonal views of B-scan (top view, front view, side view)	А – max. amplitude of an echo-signal from a defect in relation to the screen center, dB X – depth coordinate of a defect an echo-signal from which has max. amplitude, mm dX –  conditional defect width, mm Y – depth coordinate of a defect an echo-signal from which has max. amplitude, mm dY – conditional defect height, mm L – coordinate along the scanning path to a defect an echo-signal from which has max. amplitude, mm dL – conditional defect length, mm
Corrosion map	L – coordinate along the scanning path, mm X – longitudinal coordinate, mm Y – transverse coordinate, mm H – depth, mm