LaserLiner SoundTest-Master Manual

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Contents

calibration and adjustment

GB12It is possible to transfer the data to the PC in real time when conducting extensive measurements wherethere is not sufÖcient space in the internal memory for the recorded data. Data storage takes place directlyat the PC. The measured data can also be displayed and observed directly on the PC monitor.11 Real time recording (SEND DATA)Connect the device to the PC as described under Point 10 andstart the program. Press and hold the "SEND DATA" buttonfor 3 seconds to start data transfer. "SENDING" appears onthe display. All recorded data are now shown in real time onthe PC. Press the "SEND DATA" button again for 3 seconds tostop data transfer.3 secThe device is equipped with analogue signal outputs. The dB A or dBC signal is output via the CD output for connection to a chart recor-der for instance. The unÖltered signal that is recorded directly fromthe microphone is made available at the AC output for a possibleconnection to an oscilloscope.12 DC/AC outputThe calibration can be checked by means of a sound pressure levelcalibrator in accordance with IEC/EN 60942:2003ff. The calibratordeÖnes a target volume of 94 dB. The device should be checked inthe 80...130 dB setting and show 94 dB plus the tolerance range onthe display. If the displayed value deviates from the target volume,you can adjust the sound level meter to the required 94 dB by meansof the calibration screw.13 Calibration and adjustmentIt is recommended to operate the device with a controlled powerpack (9 V, > = 500 mA DC, DC power plug 3.5 x 1.3 mm). Highquality control and Öltering of the power pack is required in orderto rule out possible interference on the measurement signal (ripple<= 100 mV).14 Power pack operationFor certain measuring tasks it may be of advantage to secure the device on a tripod. To do so, screw thedevice on to a tripod with a 1/4" connection. Undo the device by turning in anticlockwise direction.15 Mounting on tripod