Product Overview
The MFD620C is an advanced digital ultrasonic flaw detector featuring a multi-color TFT LCD and a host of new features to meet challenging inspection requirements. It combines powerful flaw detection and measurement capabilities, extensive data storage, and the ability to transfer detailed inspection data to the PC via its high-speed USB port.
The instrument incorporates many advanced signal processing features including a 15MHz RF bandwidth to permit testing of thin materials, narrowband filters to improve signal to noise in high gain applications, a spike pulser for applications requiring higher frequencies, and a tunable square wave pulser to optimize penetration on thick or highly attenuating materials.
The instrument can be widely used in locating and sizing hidden cracks, voids, disbands, and similar discontinuities in welds, forgings, billets, axles, shafts, tanks and pressure vessels, turbines, and structural components.
Technical Parameters
l Range: 0 to 6000 mm, at steel velocity
l Material Velocity: 1000 to 15000m/s
l Display Delay: -20 to 3400 µs
l Probe Delay/Zero Offset : 0 to 99.99µs
l Sensitivity Leavings: >60dB (flat-bottomed deep hole 200mmФ2)
l Resolution : >40dB (5P14)
l Noise Level: ≤ 8%
l Test Modes: Pulse echo, dual element and thru-transmission
l Pulser: Tunable Square Wave Pulser
l Pulse Repetition Frequency ranges from 10 Hz to 1000 Hz
l Pulse Energy: 200V, 300V, 400V, 500V, 600V selectable
l Bandwidth (amplifier bandpass ): 0.2 to 20MHz
l Gate Monitors: Two independent gates controllable over entire sweep range
l Rectification: Positive half wave, negative half wave, full wave, RF
l System Linear Deviation:Horizontal: +/-0.2% FSW, Vertical: 3% FSH, Amplifier Accuracy +/-1 dB.
l Reject (suppression): 0 to 80% full screen height
l Units: Inch or millimeter
l Transducer Connections: BNC or LEMO
l Power Requirements: AC Mains 100-240 VAC, 50-60 Hz
l Overall Dimensions:280H×220W×70D mm
l Relative Humidity:(20 ~ 95)% RH
l Power Supply:DC 9V
l Operating Temperature: -10℃ to 50℃
l Storage Temperature: -30℃ to 50℃
Features
Display
Hi-resolution multi-color TFT LCD with 4 user-selectable brightness control provides high contrast viewing of the waveform from bright, direct sunlight to complete darkness.
The hi-resolution multi-color TFT LCD display with fast 60 Hz update gives an “analog look” to the waveform providing detailed information that is critical in many applications including nuclear power plant inspections.
Range
Up to 6000 mm in steel; range selectable in fixed steps or continuously variable. Suitable for use on large work pieces and in high-resolution measurements.
Pulser
Pulse Energy selectable among 200V, 300V, 400V, 500V and 600V..
Pulse Width tunable from 0.1µs to 0.5 µs to match the probes with different frequency.
Pulse Repetition Frequency adjustable from 10 Hz to 1 KHz in 1 Hz increments.
Damping selectable among 100Ω、200Ω and 400Ω for optimum probe performance
Test Modes include Pulse echo, dual and thru-transmission
Receiver
Sampling：10 digit AD Converter at the sampling speed of 160 MHz
Rectification：Positive Halfwave, Negative Halfwave, Fullwave and RF
Analog Bandwidth: 0.2MHz to 20MHz capability with selectable frequency ranges (automatically set by the instrument) to match probe for optimum performance.
Gain：0 dB to 110 dB adjustable in selectable steps 0.1 dB, 1.0dB, 2 dB, 6 dB, and locked.
Gates
Two fully independent gates offer a range of measurement options for signal height or distance using peak triggering.
The echo-to-echo mode allows accurate gate positioning for signals which are extremely close together.
Gate Start: Variable over entire displayed range
Gate Width: Variable from Gate Start to end of displayed range
Gate Height: Variable from 0 to 99% Full Screen Height
Alarms: Threshold positive/negative
Memory
Memory of 50 channel files to store calibration set-ups
Memory of 10000 wave files to store A-Scan patterns and instrument settings.
All the files can be stored, recalled and cleared.
Video Recorder
Screen scenes can be captured as movie files. As long as 2 hours movie can be saved to the inside memory. It can be re-played using the instrument or the PC software delivered with the instrument.
Video Recorder is useful in many situations, it is very convenient for those who want to analyze the probing activities later.
Functions
l Semiautomatic two point calibration: Automated calibration of transducer zero offset and/or material velocity
Real Time Clock
The instrument clock keeps running tracking the time.
Battery
Internal rechargeable Li-ion battery pack rated 7.2V at 8800 mAh
10 hours nominal operating time depending on display brightness
8-10 hours typical recharge time
Knob
Operating adjustments are easily and quickly made using the rotary knob.
