Eddy current testing is a noncontact method for the inspection of nonferromagnetic tubing. This technique is suitable for the detection and sizing of metal discontinuities such as corrosion, erosion, wear, pitting, baffle cuts, wall losses, and cracks in nonferrous materials.

Probes used to perform eddy current inspections are made with a copper wire wound to form a coil. The coil shape can vary to better suit specific applications.
a - The alternating current flowing through the coil at a chosen frequency generates a magnetic field around the coil.
b - When the coil is placed close to an electrically conductive material, eddy current is induced in the material.
c - If a flaw in the conductive material disturbs the eddy current circulation, the magnetic coupling with the probe is changed and a defect signal can be read by measuring the coil impedance variation.

MultiScan MS-5800E Key Features

4 simultaneous frequencies per input
This feature allows inspection speed up to 2 m/s with 4 absolute and 4 differential frequencies without signal distortion.
Electronic probe balancing
No separate external reference probe is required for absolute channel operation.
4 ECT inputs and up to 64 multiplexed channels The MS-5800E can support a large number of ECT channels to perform array-probe inspection. Compared to single channel inspection, the array-probe technology allows faster and easier surface coverage.

Tube Inspection with Remote Field and Magnetic Flux Leakage

Boilers
Feedwater heaters
Air coolers
Carbon steel heat exchangers

Remote field (RFT) is used for the inspection of ferromagnetic tubes, such as carbon steel and ferritic stainless steel. This inspection technique detects and sizes wall thinning caused by corrosion, erosion, wear, pitting, and baffle cuts. R/D Tech® remote field equipment has been used successfully on several applications: tube and shell heat exchangers, feedwater heaters, boiler tubes, and buried pipes.

Magnetic flux leakage (MFL) is a fast inspection technique, suitable for wall-loss measurement and detection of sharp defects, such as pitting, grooving, and circumferential cracks. MFL is effective for aluminum-finned carbon steel tubes, because the magnetic field is mostly unaffected by the presence of such fins.

MultiScan MS-5800R RFT and MFL Key Features

RFT with up to four different frequencies and real-time mixes
This feature allows more flexibility for mixing and defect validation. The detection and sizing of flaws at the support plate becomes easier with multifrequency inspections and dual-driver operations.
RFT with frequencies ranging from 20 Hz to 250 kHz
The higher frequency available with the MS5800R extends the RFT inspection to thinner materials with lower permeability, such as the stainless steel 400 series and other ferromagnetic alloys.
High-speed MFL inspection
The MFL technique is a good complement to RFT inspection. R/D Tech® high-saturation probes offer very good performance in tubes ranging from 0.75 in. to 1.5 in. in diameter.

Tube Inspection with IRIS for Ferrous and Nonferrous Materials

Boilers
Feedwater heaters
Air coolers
Heat exchangers

The IRIS ultrasonic option is used for the inspection of a wide range of materials, including ferrous, nonferrous, and nonmetallic tubing. This technique allows detection and sizing of wall loss as the result of corrosion, erosion, wear, pitting, cracking, and baffle cuts. R/D Tech® digital IRIS inspection technology is used extensively as a backup technique for remote field, magnetic flux leakage, and eddy current inspections.

MultiScan MS-5800U IRIS Key Features

Setup wizard
Simplifies equipment calibration for different tube diameters and materials. The wizard also generates the reporting code for the inspection.
Real-time gain and gate controls
UT settings can be modified during the C-scan acquisition to quickly optimize signal detection.
Real-time and continuous color C-scans
No missed flaws caused by operator fatigue with C-scan displays. Enhance the quality and appearance of your reports by including color maps and cross-section views of defects.
Full tube length recording capability
Analyze data offline and assess damages with the customer.

Software Features (EC/RFT/MFL/UT)

Setup wizard	Easy configuration for tube inspection with conventional probes
Automatic calibration	Simultaneous calibration of all channels and depth curves
Data file storage	Any PC-compatible media
Printing	Screen dump, acquisition and setup reports to any Microsoft® Windows NT®-compatible printer
Software Features (UT)
Measurement mode	Wall thickness: IRIS, contact
Setup display	A-scan
Profilometry display	Wall thickness, ID and OD color C-scans, B-scan for tube circumferential cross section, D-scan for tube axial cross section
Cursors	Cross-section cursors and pit-sizing cursors
Measurement	Wall loss (%), remaining wall, and statistics on tube geometry (minimum, maximum, average)
Software Requirements
Operating system	Microsoft® Windows NT®, Windows® 2000, Windows XP Pro
Hardware requirements	600 MHz Pentium® III with 256 MB RAM, 10 GB hard disk (1 GB of free space), 1024 × 768 display resolution

MultiScan MS-5800 Specifications

General Power	120 VAC or 220 VAC ±10%, automatic selection, 48 Hz to 63 Hz
Size (excluding handle)	45 cm x 30 cm x 22 cm
Weight	Maximum weight with all modules installed: 12.8 kg
Environment	20°C to 45°C operating ambient, -20°C to 70°C storage; 95% relative humidity, noncondensing
Computer interface	100Base-T Fast Ethernet™
Eddy Current Probe inputs	4 independent differential inputs and up to 64 multiplexed inputs (16 time slots)
ECT channels	16 simultaneously (4 inputs x 4 frequencies) 256 in super-multiplexed mode (with 16 time slots)
Number of frequencies	Up to 8 frequencies
Frequency range	Adjustable from 20 Hz to 6 MHz
Acquisition rate	40 kHz per channel (in non-multiplexed mode) 14 kHz divided by the number of time slots (in multiplexed mode)
Supported probes	Universal connector supports all standard differential and absolute bobbin, impedance, transmit-receive, and rotating probes (adapter cable may be required)
Probe balancing	True electronic probe balancing. No separate external reference probe is required for absolute channels
Output voltage	20 V p-p per generator
Output current	1 A (peak)
Real-time alarms	8 independent alarms
Encoders	2 quadrature encoders or digital inputs
Remote Field and Magnetic Flux Leakage
Probe inputs	4 independent inputs for RFT 4 independent inputs for MFL
RFT channels	16 simultaneously (4 inputs x 4 frequencies)
MFL channels	4 simultaneously 64 in multiplexed mode (4 x 16 time slots)
Number of frequencies	Up to 4 frequencies
Frequency range	Adjustable from 20 Hz to 250 kHz
Acquisition rate	40 kHz per channel (in non-multiplexed mode) 14 kHz divided by the number of time slots (in multiplexed mode)
Supported probes	Supports any differential and absolute probes with single or dual exciters (adapter cable may be required)
Probe balancing	True electronic probe balancing
Output voltage	20 V p-p per generator
Output current	1 A (peak)
Analog output	X and Y components of the first input
Real-time alarms	8 independent alarms
Encoders	2 quadrature encoders or digital inputs
IRIS Ultrasound Testing
Number of pulsers/receivers	Multichannel UT (1, 4, or 8) working in pulse-echo and transmit-receive modes
System bandwidth	0.5 MHz to 25 MHz
Sampling rate	8-bit 100 MHz
Transducer frequencies	1 MHz to 20 MHz
Pulse repetition rate	Up to 20 kHz
Dynamic gain (linear amplifier)	70 dB, 0.1-dB steps
A-scan length	32 to 8,092 points
Pulse voltage	50 V to 300 V, 1-V steps
High-pass filter	None, 1, 2, 5, 10 MHz
Data-acquisition synchronization	Time, continuous, position, or external
Encoders	2 quadrature encoders or digital inputs

Hardware Options

5800-E	Eddy current capability
5800-R	Remote field and magnetic flux leakage capability
5800-1U	1 internal UT channel
5800-4U	4 internal UT channels
5800-8U	8 internal UT channels

Thông tin hỗ trợ

Câu hỏi?

Liên lạc với chuyên gia Olympus NDT