Gate adjustment, Start | Epson USN 52R, USN 52L manual

Operation	Adjustment of the USN 52R/USN 52L

Gate adjustment

All functions for adjustment of Gates a and b are con- tained in the function group GATE.

– With JCgo to function group GATE.

The gates have two tasks:

•They monitor the area of the test object in which a flaw is expected. When an echo exceeds or falls below the gate, a warning signal can be activated.

•They select the echoes for the digital time-of-flight or amplitude measurement.

USN 52R/USN 52L make the two gates a and b avail- able. Gate b is only required for the measurement or calibration of multi-echo sequences and enables the measurement of the distance between two echoes. The flaw Gate b is dependent of Gate a and is correspond- ingly adjusted:

•b-START:at 10% to 90% of a-WIDTH (after a-

START)

•b-THRESH:10% to 90% screen height

AAttention:

When both gates are superimposed on each other, the wrong values can be indicated with a wrongly selected Gate b.

Both gates evaluate only within the visible area of the display. If there are gates or parts of gates outside this area, an evaluation will not be made.

5-10

Issue 05, 02/00

Krautkramer USN 52R/USN 52L

Image 55

Epson USN 52R, USN 52L manual Gate adjustment, Start

Contents

Technical Reference and Operating Manual USN 52R / USN 52L Index Introduction Function overview Basics of operation Recording a Distance-Amplitude Configuring the USN 52R/USN 52LStoring measured values Data Logger Interfaces Printing instrument settingsPrinting display contents and instrument Documentation with the PC program 10-7 10-210-8 Issue 05, 02/00 Krautkramer USN 52R/USN 52L Introduction Storage batteries Safety informationDefects/errors and exceptional stresses Introduction Important notes Preconditions for testing with ultrasonic flaw detectorsSoftware Technical test requirements Operator training Wall thickness measurements with ultrasonics Limits of testingEffect of the material of the test object Flaw boundary scanning method Assessing flaws using ultrasonicsEffect of temperature variations Measurement of remaining wall thickness Echo display comparison method USN 52L Special features of the two versionsUSN 52R/USN 52L USN 52R Introduction Remarks on this manual Getting to know the adjustment functionsService Specifications and basic settings Keys Layout of this manualDescriptions of functions Operating steps Issue 05, 02/00 Krautkramer USN 52R/USN 52L Standard package and accessories Standard package and accessories Product type Description Standard package Recommended accessories Required accessoriesProduct type Description Order no GCH1 Recommended outside products Issue 05, 02/00 Krautkramer USN 52R/USN 52L Setting into operation Setting into operation Power supplyPositioning the USN 52R/ USN 52L Nickel Cadmium NiCd Left Alkaline Alk Right Setting into operation Battery operationInserting the batteries AAttention LED Using the battery chargerStatus Probe connection Starting the USN 52 R Switching on Screen saver Reset Basics of operation Basics of operation USN 52R and USN 52L USN 52L Scan display Display Functions on the display Measurement line Indications beneath the A-scanAngle and X-VALUE Status line Menu line Function keys KeypadSpecial keys Special keys of the USN 52L for setting the display Changing the operating levels Setting the functionAccelerated adjustment Operational concept Selection of measured value for enlarged display Function keys Only USN 52L Keys for special functions Operation Important basic settingsSetting the measurement units Set language Issue 05, 02/00 Krautkramer USN 52R/USN 52L Operation Operation Function overview first operating level Gain Gain adjustment Adjustment of the USN 52R/ USN 52LSetting the dB Step Range Calibration range Selection of basic dataCoarse in steps Delay Setting the delay MTL VEL Setting the sound velocity FREQ. Frequency Setting the receiver Damping Electrical damping of the probe RECTIF. Setting the rectification mode Pulser Changeover of initial pulse Setting the pulser REP-RATEset the required percentage value with M Start Gate adjustment Start Start of the gate Thresh Determination of thresholdWidth Width of the gate Start Gate start Calibration functions Adjustment of the freely selected value Zero Probe delayMTL VEL Sound velocity Data set names and Memo mode in .10 on Recall Loading of a stored settingStoring data Clearing the instrument setting Store Storing the instrument settingsSET# Selection of data set Displaying stored A-Scans preview Clearing all data Calibration of display range USN 52R/USN 52L calibration Calibration with a straight-beam probe Straight-beam probe with delay Known sound velocity Calibration with angle-beam probesUnknown sound velocity Path error Flank modeCalibration with a dual T/R probe Higher sound velocity Automatic calibration Preconditions Preparing the instrument for digital measurementGate Logic Recall of dB difference Set Amplitude to dB Threshold Calibrating the sensitivity B DAC/TCG Function group TCG DAC/TCG mode Operation Recording a Distance- Amplitude Curve Operation Operation DAMPING, FREQ.,RECTIF., MTL VEL, Pulser and Reject Echo evaluation withAmplitude is set to dB Threshold DAC mode TCG mode Preparations Measuring thicknessMeasuring the thickness Determining the number of Files Storing measured values Data LoggerNumber of measurement locations = 2500 Number of Files Selecting a File File Number File Mode Thickness Copy Mode Datalogger MeasureClearing Files Storing measured values Viewing stored readings ErrorClearing the measured values Configuring the USN 52R/ USN 52L Left function group Left Table Value Diam Center Table MEAS.UNITS Right Table Amplitude Amplitude display Graticule Display graticule Intensity Display brightness only USN 52R Freeze Mode Storage modeHigh LOW DB Step Sets step range Gate Logic Setting the gate logic Location Selecting the measurement location File Number Selecting a file Value Displaying the measured value File Mode Enabling the Data LoggerClearing the measured value MEAS. Units Setting the measurement units Language Setting the display language Data set names Data set namesMemo function Data SET Name Entry of a data set name Data SET Direc Data set directory Memo Storing additional information Entering texts Filling in a data header Data set names Issue 05, 02/00 Krautkramer USN 52R/USN 52L Parity Parity check Setting the RS232 interfaceBaud Rate Setting the transfer speed Length Setting the length of a byte Mode Copy Mode Setting data communicationPrinter type Hard Copy Setting the flaw location calculation Thickness Material thickness Angle Angle of incidenceValue X-value of the probe Displaying the measured values Diam Test object diameter Measure Method of measurement for sound path measurement Setting the measurement methods TOF Measurement mode for time of flight Function check Locking set valuesAuxiliary devices Power supply Range Suppression Reject Damping Rectification Gate threshold Thickness measurement Issue 05, 02/00 Krautkramer USN 52R/USN 52L Documentation Printing instrument settings and display contents Copy Mode Documentation Documentation with the PC program UltraDOC Issue 05, 02/00 Krautkramer USN 52R/USN 52L Servicing and maintenance Charging NiCd cells Cleaning the USN 52R/ USN 52LMaintenance of NiCd cells Servicing and maintenance Handling AlMn batteries Handling NiCd cells Issue 05, 02/00 Krautkramer USN 52R/USN 52L Interfaces, Peripherals Interfaces, Peripherals InterfacesSerial interface RS Interfaces, Peripherals Layout of 7 pin Lemo socket RS Layout of 4 pin Lemo socket charger socket, switching output Baud Rate Connection of a peripheral Printing Data Logger report Transferring the display contents Data Logger report format Operation Set Copy Mode to Report Interfaces, Peripherals Transferring measurements values in the Data Logger to a PC Transferring measurement values Transfer formats Printing display contents and instrument settings Byte-No Data Format X.XXX Esccodereturn USN 52R/USN 52L remote operation Interfaces, Peripherals Delay Length Store Number of fields Configuring the Memo functionSequence of commands of the Memo code Defining data header Example for a header definition Eschn 9RETURN Entering Memo text Lemo Analog outputs Measure = 0 to 1st RF modeAnalog voltage for the sound path of an echo Rectified echoes TTL switching output Specifications Specifications Frequency -3dB ranges Measurement resolutionEcho height resolution Display rectification DAC/TCG Probe connectors Storage temperatureOperating temperature Battery mode Issue 05, 02/00 Krautkramer USN 52R/USN 52L Appendix Appendix Function directory Damping Rcvr Curve TCGDAC Echo TCG DAC/TCG TCG Gain Data SET MEMData SET Preview MEM FREQ. Rcvr RECTIF. Rcvr MTL VEL BasicPulser Puls Recall MEM Velocity #1 Reject PulsREP-RATE Puls Store MEM EC Certificate of Conformity Krautkrämer GmbH & Co. oHG Service addressesFrance Japan USA 10-10 Issue 05, 02/00 Krautkramer USN 52R/USN 52L Changes Changes Index Copy Mode DAC 12-4 Issue 05, 02/00 Krautkramer USN 52R/USN 52L Parameter Dump 5-58, 6-3 Parity Reject Krautkramer USN 52R/USN 52L Issue 05, 02/00 12-7 Value Zero 5-13 Zoom key Operating Manual Option DGS R5 TCG/DGS R6 TCG/DGS L4 TCG/DGS L5 TCG/DGS DGS-6 ContentsDGS-17 DGS-29 DGS-4 Issue 02, 03/99 Krautkramer USN 52R/USN 52L Option DGS DGS-5 How to measure with the DGS DGS-7 Overview of the method of proceeding Overview of the DGS menu Switch from TCG to DGS mode DGS modeOverview of the DGS menu Function group DGS mode Gain Menu functions Function table DGS mode PROBE-# ATT-REF Page Operating the DGS Operating the DGS Storing a new probe Operating the DGS Preparing the DGS evaluation Diameter of the equivalent Operating the DGS Carrying out a DGS evaluation Or O Switching off the DGS mode Switching off the DGS mode Storing data Page Codes for remote control Codes for remote control ATT-REF DGS-32 Issue 02, 03/99 Krautkramer USN 5 /USN 52L Option DGS