az-instrument AZ8922 Owner'S Manual Download | Manualshive

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DIGITAL SOUND 8922

Owner‘s manual

Sound level meter

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Summary of Contents for AZ8922

Page 1: ...DIGITAL SOUND 8922 Owner s manual Sound level meter ...

Page 2: ...is device may be used only by persons with sufficient physical sensorial and intellectual abilities and having corresponding knowledge and experience Other persons may use this device only if they are supervised or instructed by a person who is responsible for their safety Danger for children Ensure that plastic bags packaging etc are disposed of properly and are not within reach of babies and you...

Page 3: ...ances internal connections in third party devices e g connection GND to earth may result in not per missible voltages that may affect the device itself or a connected device in its function or even destroy it External power supply The unit can be powered by an external power supply Whenever you connect an external power supply ensure that the operating voltage indicated on the power supply matches...

Page 4: ...selection out of 6 ranges from 30 dB to 130 dB and offers a resolution of 0 1 dB The de vice complies with the ANSI S1 4 and IEC 651 Type 2 standards A particular feature is the option to compensate for the background level by pressing a key and to specifically evaluate noise sources in the foreground Us ing two weighting filters A or C the sound level is weighted according to IEC standard Further...

Page 5: ...BA MODE Button for background suppression 8 F S Button to set the measurement interval 9 DOWN Button to select the measuring range 10 UPPER Button to select the measuring range 11 DC 9V Connection for external power supply 12 CAL Button to adjust the calibration point 13 AC OUT Audio output 14 DC OUT Envelope output 15 RS232 RS 232 interface 16 BACKLIT Button for display lighting ...

Page 6: ... level measurements are carried out in the context of legal noise insulation regulations The C type weighting filter is mainly for the lower ranges of advantage The signal spectrum is evaluated linearly For example C weighting is suitable for noise analysis of engines or machines To switch between the two weighting filters press the C A button The cur rently selected weighting filter is indicated ...

Page 7: ... a new analysis Suppression of the background noise level Using this special function it is possible to determine the noise level of indi vidual noise sources such as machinery even while in the background there is a latent noise 1 Press ON OFF to turn the unit on 2 Press the button MAXHLD This is confirmed in the display 3 Then click the BA MODE button The display shows F next to the note SPL and...

Page 8: ...The currently selected range is shown by the numbers below the bargraph If the UPPER or DOWN button is pressed for 2 seconds the unit returns to the automatic range selection mode In manual range selection mode the note UNDER is displayed if the measured sound levels are too low for the selected range On range overrun the note UP PER is displayed In both cases you have to re select the measurement...

Page 9: ...wo wave forms Left Right On the left channel the microphone signal is mapped If the signal is driven to 100 the value of 130 dB is reached maximum level Replacing the Battery When the display flashes and the message BAT appears the 9 V battery is exhausted and should be replaced as soon as possible Unscrew the lid of the battery compartment on the rear panel of the unit using a screwdriver Insert ...

Page 10: ...l measured and recorded channels in a reading time diagram recorder func tion By Drag and Clic a win dow section can be en larged and the time or volume axis can be scaled as required Besides the graphical view the rep resentation in the form of a table is possible The clipboard is used to transfer the measurements to a spreadsheet or word processing All tables and graphs can be printed in colour ...

Page 11: ...aph Display step 1 dB 50 dB display range updated every 40 ms Microphone 6 mm electret condenser microphone Analogue output AC 0 707 Vrms DC 10 mV DC dB Serial interface 2400BD8N1 N 044 5dB 0D 0A Dimensions 80 mm x 256 mm x 38 mm Weight 240 g Operating conditions 4 50 C 10 90 rF Storage temperature 20 60 C Power supply 9 V alkaline battery Operating time with 9 V alk battery approx 20 hours Scope ...

Page 12: ...dly materi als have been chosen that can be supplied to normal recycling Ensure that plastic bags packaging etc are properly disposed of Do not just dispose of these materials with your normal household waste but make sure that they are collected for recycling Please follow the notes and markings on the packaging Batteries must not be disposed of as domestic waste or thrown into fire Dispose of th...

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