Calibration And Adjustment - LaserLiner SoundTest-Master Mode D'emploi

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Real time recording (SEND DATA)
It is possible to transfer the data to the PC in real time when conducting extensive measurements where
there is not suf cient space in the internal memory for the recorded data. Data storage takes place directly
at the PC. The measured data can also be displayed and observed directly on the PC monitor.
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DC/AC output
The device is equipped with analogue signal outputs. The dB A or dB
C signal is output via the CD output for connection to a chart recor-
der for instance. The un ltered signal that is recorded directly from
the microphone is made available at the AC output for a possible
connection to an oscilloscope.
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Calibration and adjustment

The calibration can be checked by means of a sound pressure level
calibrator in accordance with IEC/EN 60942:2003ff. The calibrator
de nes a target volume of 94 dB. The device should be checked in
the 80...130 dB setting and show 94 dB plus the tolerance range on
the display. If the displayed value deviates from the target volume,
you can adjust the sound level meter to the required 94 dB by means
of the calibration screw.
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Power pack operation
It is recommended to operate the device with a controlled power
pack (9 V, > = 500 mA DC, DC power plug 3.5 x 1.3 mm). High
quality control and ltering of the power pack is required in order
to rule out possible interference on the measurement signal (ripple
<= 100 mV).
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Mounting on tripod
For certain measuring tasks it may be of advantage to secure the device on a tripod. To do so, screw the
device on to a tripod with a 1/4" connection. Undo the device by turning in anticlockwise direction.
12 GB
Connect the device to the PC as described under Point 10 and
start the program. Press and hold the "SEND DATA" button
for 3 seconds to start data transfer. "SENDING" appears on
the display. All recorded data are now shown in real time on
the PC. Press the "SEND DATA" button again for 3 seconds to
stop data transfer.
3 sec