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Summary of Contents for NDT NDT-710
- Page 1 INTERNATIONAL, INC. 711 S. Creek Road (610) 793-1700 West Chester, PA 19382 FAX (610) 793-1702 www.ndtint.com E-mail: ndtint@ndtint.com Operating Instruction Manual Revision 2 NDT-710 Ultrasonic Thickness Gauge...
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Page 2: Table Of Contents
INTERNATIONAL, INC. NDT-710 Thickness Gauge NDT- 710 Ultrasonic Thickness Gauge Operating Instructions Rev. 2 Table of Contents Page No. Basic Introduction to Ultrasonic Thickness Gauging: How Does It Work? ............. What Materials Can Be Measured? ......Things To Consider ............ -
Page 3: Basic Introduction To Ultrasonic Thickness Gauging
INTERNATIONAL, INC. NDT-710 Thickness Gauge A Basic Introduction to Ultrasonic Thickness Gauging Ultrasonic thickness gauging is a widely used technique for measuring the thickness of a material from one side. The first commercial ultrasonic gauges, using principles derived from sonar, were introduced in the late 1940's. Small portable instruments dedicated to a wide variety of applications became common in the 1970's. -
Page 4: What Materials Can Be Measured
INTERNATIONAL, INC. NDT-710 Thickness Gauge It is practically impossible to efficiently transmit ultrasound from the transducer to the object to be measured without the aid of a suitable coupling medium, usually referred to simply as couplant. Couplants frequently used for thickness gauging are water, oil, gel, glycerin, and propylene glycol. - Page 5 INTERNATIONAL, INC. NDT-710 Thickness Gauge Materials Material is the most important determinant in final selection of gauge and transducer. Certain materials, including most metals, glass, and ceramics, are excellent for sound propagation and lend themselves to a wide range of measurement modes and transducer frequencies.
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Page 6: Dual Transducers
Dual Transducers The most common application for thickness measurements involves "dual" or "pitch-catch" transducers. This is the type used with the NDT-710 thickness gauge. These employ separate transmitter and receiver transducer elements mounted on a delay line. The two-transducer elements are slightly angled towards each other, creating a “V” shaped sound path beneath the surface of the part. -
Page 7: Specifications
Keypad has built-in 0.250" thick calibration block The standard kit includes the NDT-710 gauge, a 0.25" element diameter (.41" contact face diameter) x 5.0 MHz dual element transducer with comfort grip housing on 4-foot long top-exiting cable with LEMO #00 plug connectors, a 4 oz. bottle of top quality... -
Page 8: Operation
1) Connect the dual element transducer to the connector sockets at the top of the gauge. 2) Turn the NDT-710 gauge on by pressing the ON/OFF key at the upper left of the keypad. If the gauge has already been calibrated it will display the last reading taken;... -
Page 9: Calibration
Zero Calibration step is repeated. Using A Special Application Transducer - Sensitivity Adjustment When using other than the standard transducer provided with the NDT-710 gauge it may be necessary to make an adjustment to the sensitivity pot. This adjustment may be necessary when using these special application transducers: Part No. -
Page 10: Battery Replacement
INTERNATIONAL, INC. NDT-710 Thickness Gauge ( : CAL ). 6) Observe that the display shows 7) Turn the sensitivity adjustment pot gradually, in a Clockwise (CW) direction, until the display changes to ( - - - - ), which indicates proper calibration of the transducer to the gauge. -
Page 11: Maintenance
INTERNATIONAL, INC. NDT-710 Thickness Gauge Maintenance 1) DO NOT WRAP THE TRANSDUCER AROUND THE GAUGE. This will damage the LEMO connector sockets. 2) Check the transducer cable regularly for cuts or abrasions and that connectors are securely attached. 3) The LCD is made of glass and may break if the gauge is dropped. Be careful. -
Page 12: Velocity And Conversion Table
4.65 1.23 EXAMPLE: At factory setting, the NDT-710 Thickness Gauge reads 0.630" when measuring a copper plate. Since the velocity of copper is less than that of steel, the actual thickness would be less than the gauge display reading. Finding the appropriate material in the above table and dividing the gauge reading by the conversion factor (1.26 for Copper) will convert the reading to... -
Page 13: Thickness Reference Blocks
INTERNATIONAL, INC. NDT-710 Thickness Gauge 5-Step Steel Thickness Calibration Block (Typical) Note: The typical thickness reference block is supplied in Ni-plated C1018 steel and is also available in 7075 Aluminum and 304 Stainless Steel. A Metric version is also available in 2.5 mm steps in a thickness range... -
Page 14: Warranty
NDT-710 Thickness Gauge Equipment Warranty 1. Electronic instrumentation manufactured by NDT International Inc. is warranted to be free from defects in workmanship and material under normal use and service for a period of one year from the date of shipment unless otherwise specified. - Page 15 INTERNATIONAL, INC. NDT-710 Thickness Gauge NOTES and COMMENTS...
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