REP-RATEset the required percentage value with M | Epson USN 52L

Adjustment of the USN 52R/USN 52L	Operation

REJECT Suppression of spurious echoes

REP-RATE Repetition rate

With the REJECT function you are able to suppress unwanted signals, e.g. material noise.

The setting, given in percent, indicates the height that echoes have to reach in order to be displayed in the first place.

Operation:

In REJECT set the required percentage value with M.

AAttention:

Be careful with this function because flaw echoes can also be suppressed.

The number of the ultrasonic signals emitted per sec- ond is varied using this function. This enables selective suppression of spurious or interference echoes and especially phantom echoes which may occur when testing larger test objects. The function enables two settings:

•HIGH: Maximum pulse repetition rate

(113 to 905 Hz, depending on the range setting); default setting.

•LOW: Reduced pulse repetition rate

(56 to 452 Hz, depending on the range setting); for testing larger test objects or in case any statistical noise signals occur.

Operation:

In REP-RATEset the required percentage value with M.

Krautkramer USN 52R/USN 52L

Issue 05, 02/00

5-9

Image 54

Epson USN 52L, USN 52R manual REP-RATEset the required percentage value with M

Contents

USN 52R / USN 52L Technical Reference and Operating Manual Introduction Index Basics of operation Function overview Configuring the USN 52R/USN 52L Recording a Distance-AmplitudeStoring measured values Data Logger Documentation with the PC program Printing instrument settingsPrinting display contents and instrument Interfaces 10-2 10-710-8 Issue 05, 02/00 Krautkramer USN 52R/USN 52L Introduction Introduction Safety informationDefects/errors and exceptional stresses Storage batteries Preconditions for testing with ultrasonic flaw detectors Important notesSoftware Operator training Technical test requirements Limits of testing Wall thickness measurements with ultrasonicsEffect of the material of the test object Measurement of remaining wall thickness Assessing flaws using ultrasonicsEffect of temperature variations Flaw boundary scanning method Echo display comparison method USN 52R Special features of the two versionsUSN 52R/USN 52L USN 52L Introduction Specifications and basic settings Getting to know the adjustment functionsService Remarks on this manual Operating steps Layout of this manualDescriptions of functions Keys Issue 05, 02/00 Krautkramer USN 52R/USN 52L Standard package and accessories Standard package and accessories Standard package Product type Description Required accessories Recommended accessoriesProduct type Description Order no Recommended outside products GCH1 Issue 05, 02/00 Krautkramer USN 52R/USN 52L Setting into operation Power supply Setting into operationPositioning the USN 52R/ USN 52L AAttention Setting into operation Battery operationInserting the batteries Nickel Cadmium NiCd Left Alkaline Alk Right Using the battery charger LEDStatus Switching on Probe connection Starting the USN 52 R Reset Screen saver Basics of operation USN 52R and USN 52L Basics of operation USN 52L Display Scan display Functions on the display Indications beneath the A-scan Measurement lineAngle and X-VALUE Status line Menu line Keypad Function keysSpecial keys Special keys of the USN 52L for setting the display Operational concept Setting the functionAccelerated adjustment Changing the operating levels Function keys Selection of measured value for enlarged display Keys for special functions Only USN 52L Set language Important basic settingsSetting the measurement units Operation Issue 05, 02/00 Krautkramer USN 52R/USN 52L Operation Function overview first operating level Operation Adjustment of the USN 52R/ USN 52L Gain Gain adjustmentSetting the dB Step Selection of basic data Range Calibration rangeCoarse in steps MTL VEL Setting the sound velocity Delay Setting the delay Setting the receiver FREQ. Frequency RECTIF. Setting the rectification mode Damping Electrical damping of the probe Setting the pulser Pulser Changeover of initial pulse REP-RATEset the required percentage value with M Gate adjustment Start Thresh Determination of threshold Start Start of the gateWidth Width of the gate Calibration functions Start Gate start Zero Probe delay Adjustment of the freely selected valueMTL VEL Sound velocity Recall Loading of a stored setting Data set names and Memo mode in .10 onStoring data Store Storing the instrument settings Clearing the instrument settingSET# Selection of data set Clearing all data Displaying stored A-Scans preview USN 52R/USN 52L calibration Calibration of display range Calibration with a straight-beam probe Straight-beam probe with delay Calibration with angle-beam probes Known sound velocityUnknown sound velocity Flank mode Path errorCalibration with a dual T/R probe Automatic calibration Higher sound velocity Preparing the instrument for digital measurement PreconditionsGate Logic Calibrating the sensitivity B Recall of dB difference Set Amplitude to dB Threshold DAC/TCG DAC/TCG mode Function group TCG Operation Recording a Distance- Amplitude Curve Operation Operation Echo evaluation with DAMPING, FREQ.,RECTIF., MTL VEL, Pulser and RejectAmplitude is set to dB Threshold DAC mode TCG mode Measuring thickness PreparationsMeasuring the thickness Storing measured values Data Logger Determining the number of FilesNumber of measurement locations = 2500 Number of Files Selecting a File Storing measured values File Mode Thickness Copy Mode Datalogger MeasureClearing Files File Number Error Viewing stored readingsClearing the measured values Configuring the USN 52R/ USN 52L Left Table Left function group Center Table Value Diam Right Table MEAS.UNITS Graticule Display graticule Amplitude Amplitude display Freeze Mode Storage mode Intensity Display brightness only USN 52RHigh LOW DB Step Sets step range Gate Logic Setting the gate logic File Number Selecting a file Location Selecting the measurement location File Mode Enabling the Data Logger Value Displaying the measured valueClearing the measured value Language Setting the display language MEAS. Units Setting the measurement units 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 Length Setting the length of a byte Setting the RS232 interfaceBaud Rate Setting the transfer speed Parity Parity check Hard Copy Copy Mode Setting data communicationPrinter type Mode Setting the flaw location calculation Angle Angle of incidence Thickness Material thicknessValue X-value of the probe Diam Test object diameter Displaying the measured values Setting the measurement methods Measure Method of measurement for sound path measurement TOF Measurement mode for time of flight Locking set values Function checkAuxiliary 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 Servicing and maintenance Cleaning the USN 52R/ USN 52LMaintenance of NiCd cells Charging NiCd cells Handling NiCd cells Handling AlMn batteries Issue 05, 02/00 Krautkramer USN 52R/USN 52L Interfaces, Peripherals Interfaces Interfaces, PeripheralsSerial interface RS Interfaces, Peripherals Layout of 7 pin Lemo socket RS Layout of 4 pin Lemo socket charger socket, switching output Connection of a peripheral Baud Rate Transferring the display contents Printing Data Logger report Operation Set Copy Mode to Report Data Logger report format Interfaces, Peripherals Transferring measurement values Transferring measurements values in the Data Logger to a PC Printing display contents and instrument settings Transfer formats Byte-No Data Format X.XXX USN 52R/USN 52L remote operation Esccodereturn Interfaces, Peripherals Delay Length Store Defining data header Configuring the Memo functionSequence of commands of the Memo code Number of fields Example for a header definition Eschn 9RETURN Entering Memo text Analog outputs Lemo Rectified echoes RF modeAnalog voltage for the sound path of an echo Measure = 0 to 1st TTL switching output Specifications Specifications Display rectification Measurement resolutionEcho height resolution Frequency -3dB ranges DAC/TCG Battery mode Storage temperatureOperating temperature Probe connectors Issue 05, 02/00 Krautkramer USN 52R/USN 52L Appendix Function directory Appendix DAC/TCG TCG Curve TCGDAC Echo TCG Damping Rcvr FREQ. Rcvr Data SET MEMData SET Preview MEM Gain Recall MEM MTL VEL BasicPulser Puls RECTIF. Rcvr Store MEM Reject PulsREP-RATE Puls Velocity #1 EC Certificate of Conformity Service addresses Krautkrämer GmbH & Co. oHGFrance USA Japan 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 Option DGS Operating Manual R5 TCG/DGS R6 TCG/DGS L4 TCG/DGS L5 TCG/DGS DGS-29 ContentsDGS-17 DGS-6 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 DGS mode Switch from TCG to DGS modeOverview of the DGS menu Function group DGS mode Menu functions Gain Function table DGS mode PROBE-# ATT-REF Page Operating the DGS Storing a new probe Operating the DGS 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