ОKО-22М-UT ultrasonic flaw detector purpose

The ОКО-22М-UT ultrasonic flaw detector is a standalone electronic unit and is intended for application in high-performance automated multi-channel NDT Systems, transportable systems (mechanized NDT systems) or for manual testing.

Available in several flaw detector models that are different in number of channels and in a volume of built-in functions for results processing.

Due to the flaw detector is designed in a form of a standalone device with the connection to the PC via Ethernet port, the several UT channels can be connected to the PC via Switch unit. This allows to create UT multi-channel testing systems.

Technical capabilities of the flaw detector allow to use it both in stationary-type in-line and off-line testing systems.

APPLICATION OF ULTRASONIC TESTING TECHNIQUE IN VARIOUS INDUSTRIES:

Production sector, test object

Regulatory Documentation

Required number of channels

Operating frequency, MHz

Testing techniques

Metallurgy, testing the flat rolled steel

EN10160, ASTM 578/A578M-96, A435A, ISO 12094

60-100

2-5

Immersion or contact

Metallurgy, testing the rolled round steel bars

EN 10308, EN 10228-3, ASTM E – 2375, MS-STD – 2154

3-20

2-10

Immersion or contact, testing velocity is up to 2 m/s

Engineering, testing the pipe welded joints

API 5L, API5 CT, EN 10246-17

12

2-5

Immersion or contact, velocity is up to 2 m/s

Engineering, testing the pipe body, thickness gauging

API 5L, API5CT, EN 10246, ASTM E1816-96

56

2-5

Immersion or contact, velocity is up to 1 m/s. Resonance-frequency technique for measuring the pipe
wall thickness – from 0.2 to 5.0 mm.

Figure 1 – UT channel "ОКО-22М"

Figure 2 - Structural scheme for connecting the UT channels

Parameter

Value

PULSER

Pulse mode

Spike pulser, Square-Wave pulser

Pulse Voltage (SQ mode)

120-300 V in steps 10 V with tolerance 10%

Pulse falling/rising time

5 ns

Pulse Width (SQ mode)

20 – 500 ns in steps 10 ns with tolerance 10%

PRF (SQ mode)

15 – 2000 Hz in steps 5 Hz, 3 automatic modes: Auto Low, Auto Med, Auto High, Manual

Pulse Voltage (spike mode)

Low (100 V), High (400 V)

Pulse energy (spike mode)

Low (30 ns), High (100 ns)

PRF (spike mode)

15 – 8000 Hz in steps 5 Hz, 3 automatic adjustment modes: Auto Low, Auto Med, Auto High, Manual

Damping

50, 62, 150, 400

RECEIVER

Gain

0 to 110 dB adjustable in steps of 0.2, 0.5, 1, 2 dB

Receiver input impedance

400Ω±5%

Receiver bandwidth

0.2-27 MHz (- 3 dB)

Digital filter setting

Eight digital filter sets standard (0.2-10 MHz; 2.0-21.5 MHz; 8.0-26.5 MHz; 0.5-4 MHz;
5-15 MHz; 5-15 MHz; DC-10 MHz )

Rectification

Fullwave, positive halfwave, negative halfwave, RF

Amplitude measurement

0-110%

Reject

0-80% FSH

Units

Millimeters, inch or microseconds

Range

1 to 6000 mm

Velocity range

1000 to 10000 m/s in steps of 1, 10, 100, 1000 m/s

Thickness measurements range

0.6 to 6000 mm

Probe angle

00 to 900 in steps 0.10, 1.00, 100

DIGITAL SPECIFICATION

ADC

10 – bits with the sampling rate 100 MHz

A-Scan buffer

8 KB

GATE

Measurements gates

  • 2 fully independent three-level gates for amplitude and time of flight measurement.
  • Additional gate for acoustic coupling control.
  • Additional gate for immersion control.
  • Special-purpose gate of the Automatic gain control (AGC).

Start Gate

Variable over entire range

Width Gate

Variable over entire range

Gate height

Variable from 2 to 100% FSH

MEASUREMENT SPECIFICATION

Result display

A-scan, B-scan, C-scan, D-scan, TOFD scan

DAC/TCG

  • Dynamic range is up to 110 dB.
  • Number of points is 32.
  • Building TCG curve by DAC

DGS

  • Automatic building of up to 3 curves for different equivalent diameters
  • Calibration at calibration blocks and testing objects
  • Building TCG curve by DGS

CONNECTORS

Probe connector

2 BNC or 2 Lemo 1S

USB port

USB-2.0

Ethernet

+

Alarm output

+

Encoder

1 Lemo (with the option of two encoders operation)