General-tools-and-instruments DSM8925 Manual do Utilizador

DIGITAL SOUNDMETER WITHJUMBO DISPLAYUSER’S MANUALDSM8925Please read this manual carefully and thoroughly before using this product.

The meter can display its results more quicklybecause it does not have to first determinewhich range to use.To exit Autoranging Mode and enterManual R

digital display will show the letters LO or HI. If this happens often, consider switching backto Autoranging mode.To exit Manual Ranging mode and retu

curve simulates the response of the humanear, and is therefore the better choice formeasuring the sound level of an environmentfor the purpose of regu

session. While the digital display is showingthe minimum sound value, the metercontinues to measure real-time sound levelinputs and to display its res

However, the digital display is updated onlywhen the meter detects a louder sound.To enter MAX HOLD mode, press the MAXHOLD button at the lower right

CALIBRATING THE METERThe DSM8925 must be calibrated before it can make accurate sound levelmeasurements. To begin, obtain a standardacoustic calibrato

SPECIFICATIONSMeasurement Range 40 to 130 dB over four ranges Measurement Accuracy ±2 dBDigital Display Resolution 0.1 dBDigital Display Refresh 160 m

MAINTENANCE TIPSWhen the icon appears at the upper rightof the display, it’s time to replace the four AAAbatteries that power the instrument (althoug

Acceptance of the exclusive repair andreplacement remedies described herein is acondition of the contract for purchase of thisproduct. In no event sha

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TABLE OF CONTENTSIntroduction . . . . . . . . . . . . . . . . . . . . . . 3Key Features . . . . . . . . . . . . . . . . . . . . . 4What’s in the Box

GENERAL TOOLS & INSTRUMENTS80 White StreetNew York, NY 10013-3567PHONE (212) 431-6100FAX (212) 431-6499TOLL FREE (800) 697-8665e-mail: sales@gener

INTRODUCTIONThank you for purchasing General Tools &Instruments’ DSM8925 Digital Sound Meterwith Jumbo Display. Please read this user’smanual care

Physical features of the DSM8925 include ananalog output jack for connecting to a datalogger or chart recorder, a tripod mountingsocket, and an adjust

WHAT’S IN THE BOXThe DSM8925 comes fully assembled in a boxalong with a wind shield ball, four “AAA”batteries and this user’s manual.PRODUCT OVERVIEWF

F. R EC —Enters/exits Recording modeG. RNG—Selects autoranging or manual rangingH. F/S—Selects fast or slow time responseI. MAX HOLD buttonJ. Calibrat

FAST Meter is applying fast time weightingto inputsSLOW Meter is applying slow time weightingto inputsAUTO Meter is automatically choosingmeasurement

SETUP INSTRUCTIONSINSTALL FOUR BATTERIESThe meter’s battery compartment isaccessible from the back of the unit. Use aPhilips-head screwdriver to remov

To measure the loudness of a soundsource, point the microphone at it. The meter’s default settings are autorangingon (enabling measurements from 30 to