StressTel T-MIKE E Bedienungsanleitung
T-MIKE E/P/B
OPERATION
MANUAL
T-MIKE E/P/B
OPERATION
MANUAL
2005 G E Inspection Technologies , LP
50 Industrial P ark R d.
Lewis town, PA 17044
US A
P : 717.242.0327, F : 717.242.2606
www.G E Ins pectionTechnologies.com
T -MIK E E /P /B
OP E R AT ION
MANUAL
R E V H
VERSION 4
2005 G E Inspection Technologies , LP
50 Industrial P ark R d.
Lewis town, PA 17044
US A
P : 717.242.0327, F : 717.242.2606
www.G E Ins pectionTechnologies.com
T -MIK E E /P /B
OP E R AT ION
MANUAL
R E V H
VERSION 4
021-002-147
Table of Contents
IMPORTANT NOTICE................................................................................................................. 1
THEORY OF OPERATION......................................................... ................................................. 5
DIAGRAM OF SYSTEM ............................................................................................................. 7
SPECIFICATIONS ...................................................................................................................... 9
INITIAL SETUP........................................................................................................................... 11
OPERATION .............................................................................................................................13
T-MIKE PROGRAMMABLE.................................................. .......................................................19
T-MIKE BASIC...........................................................................................................................21
HELPFUL HINTS ON OPERATION.............................................................................................23
MAINTENANCE AND TROUBLESHOOTING ................................................................................25
WARRANTY AND SERVICE....................................................................................................... 27
APPENDIX A............................................................................................................................29
APPENDIX B. .........................................................................................................................31
Table of Contents
IMPORTANT NOTICE................................................................................................................. 1
THEORY OF OPERATION......................................................... ................................................. 5
DIAGRAM OF SYSTEM ............................................................................................................. 7
SPECIFICATIONS ...................................................................................................................... 9
INITIAL SETUP........................................................................................................................... 11
OPERATION .............................................................................................................................13
T-MIKE PROGRAMMABLE.................................................. .......................................................19
T-MIKE BASIC...........................................................................................................................21
HELPFUL HINTS ON OPERATION.............................................................................................23
MAINTENANCE AND TROUBLESHOOTING ................................................................................25
WARRANTY AND SERVICE....................................................................................................... 27
APPENDIX A............................................................................................................................29
APPENDIX B. .........................................................................................................................31
1
Important Notice
ThefollowinginformationmustbereadandunderstoodbyanyuserofaGEInspectionTechnologies ultrasonic
thicknessgauge.
Failure to follow these instructions can lead to errors in thickness measurements or other test results. Decisions
basedon erroneous results can, in turn, lead topropertydamage,personalinjuryordeath.
General Warnings
Properuseofultrasonictest equipment requires three essential elements:
· Selection of the correct test equipment
·Knowledgeofthespecific“testapplicationrequirements”
·Trainingonthepartoftheinstrumentoperator
Thisoperating manualprovidesinstructioninthebasicset-upand operationoftheGEInspectionTechnologiesthickness
gauge. Thereare,however,additionalfactors whichaffecttheuseofthe ultrasonictestequipment. Specificinformation
regarding these additional factors is beyond the scope of this manual. The operator should refer to text books on the
subjectofultrasonictestingformoredetailedinformation.
Operator Training
Operatorsmustreceive adequatetrainingbeforeusingultrasonic testequipment. Operatorsmustbe trainedingeneral
ultrasonictestingproceduresandintheset-upandperformancerequiredbyaparticulartest. Operatorsmustunderstand:
Soundwavepropagationtheory
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•Effects of the sound velocity of the test material
•Behaviorofthesoundwave where two different materialsareincontact
•Areascoveredbythesoundbeam
More specific information about operator training, qualification, certification and test specifications is available from
varioustechnicalsocieties,industrygroups,andgovernment agencies.
Testing Limitations
In ultrasonic testing, information is obtained only from within the limits of the sound beam. Operators must exercise
great caution in making inferences about the test material outside the limits of the sound beam. For example, when
testinglargematerials,itmaybeimpossibleorimpracticaltoinspecttheentiretestpiece. When a less-than-complete
inspectionistobe performed, theoperatormustbeshown the specificareastoinspect. Inferencesabout the condition
ofareasnotinspected,basedon data from the evaluated areas, shouldonlybeattemptedbypersonnelfullytrained in
applicable statistical and probability techniques. In particular, materials subjects to corrosion or erosion, in which
conditionscanvarysignificantlyinany given area, should be evaluatedonlybyfullytrainedandexperienceoperators.
Sound beams reflect from the first interior surface encountered. Because of part geometry and overlapped flaws or
overlappedsurface,thicknessgaugesmaymeasurethe distance to an internal flaw rather than totheback wallofthe
material. Operators must take steps to ensure that the entire thickness of the test material is being examined.
UltrasonicThickness Measurement Critical Operating Procedure
Thefollowingoperatingproceduresmustbeobservedbyallusersofultrasonicthicknessgaugesinordertominimize
errors in test results.
3
Calibration of Sound Velocity
The principle of operation of an ultrasonic thickness gauge is that the instrument measures the time of flight of an
ultrasonic pulse through the test piece and multiplies this time by the velocity of sound in the material. Thickness
measuring error is minimized by ensuring that the sound velocity to which the instrument is calibrated is the sound
velocityofthematerialbeingtested. Actual sound velocity in materials oftenvary significantly from the values found in
published tables. In all cases, best results are obtained if the instrument is calibrated on a velocity reference block
made from the same material as the test piece; this block should be flat and smooth and as thick as the maximum
thickness of the test piece. Operator should also be aware that sound velocity may not be constant in the material
being tested; heat treating, for example, can cause significant changes in sound velocity. This must be considered
when evaluating the accuracy of the thickness provided by this instrument. Instruments should always be calibrated
before testing, and the calibration should be checked after testing, to minimize testing errors.
Probe Zero Procedure
Theprobezeroproceduremustbe performed as described in this manual. The zero reference block should be clean
and in good condition, without noticeable wear. Failure to properly perform the probe zero procedure will result in
inaccuratethicknessreadings.
Effects of Temperature on Calibration
Variationsintemperaturechangethesoundvelocityofmaterialsandtransducerdelaylinesandtherefore,zerocalibration.
Allcalibrationsshouldbeperformedon-siteandwithtestblocksatthesametemperatureasthetestpiece,inorderto
minimizeerrorsduetotemperature variations.
Transducer Selection
The transducer used in testing must be in good condition without noticeable wear of the front surface. Badly worn
transducers will have a reduced effective measuring range. The specified range of the transducer must include the
completerangeof thickness tobetested. Thetemperature of thematerialtobe testedmustbewithinthen transducer’s
temperaturerange.
4
Use of Couplants
Operators must be familiar with the use of ultrasonic couplants. Testing skills must be developed so that couplant is
used and applied in a consistent manner to minimize variations in couplant layer thickness and errors in test results.
Calibrationandactualtestingshouldbeperformedundersimilarcouplingconditions,usingaminimumofcouplant
andapplyingconsistentpressureonthetransducer.
Doubling
Ultrasonic thickness gauges will, under certain conditions, display readings which are twice (or in some cases, three
times) the actual material thickness being measured. This effect, commonly known as “doubling,” can occur below
the minimum specified range of the transducer. If the transducer being used is worn, doubling is possible at
thicknessesgreater that the minimum specified range.
When using a new transducer, any reading which is less than twice the minimum specified range of the transducer
may be a “doubled” reading, and the thicknesses of the material being tested should be verified by the use of other
methods. If the transducer shows any sign of wear, doubling may occur at thicknesses greater than twice the
minimumspecificrange. Thisthickness should be determined by calibrating the instrument/transducer combination
on reference blocks that represent the complete range of possible thicknesses that may be encountered in testing.
This is particularly important when the test piece is being ultrasonically measured for the first time or in any case
where the history of thickness of the specimen in unknown.
Dieses Handbuch passt für folgende Modelle
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