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DIGITAL SOUND

METER WITH

JUMBO DISPLAY

USER’S MANUAL

DSM8925

Please read this manual carefully and thoroughly

before using this product.

Содержание DSM8925

Страница 1: ...DIGITAL SOUND METER WITH JUMBO DISPLAY USER S MANUAL DSM8925 Please read this manual carefully and thoroughly before using this product...

Страница 2: ...ions 8 15 Making Basic Measurements 8 9 Autoranging vs Manual Ranging 9 11 Time and Frequency Weighting Options 11 12 Storing and Recalling MIN and MAX Readings 12 13 Operating in MAX HOLD mode 13 14...

Страница 3: ...Real time measurements are shown within a backlit liquid crystal display window in two forms as a three or four digit number and as a line on an analog bar graph Several features improve the meter s...

Страница 4: ...owered by four AAA batteries also included KEY FEATURES Measures sound level of a machine or an environment Jumbo LCD is easy to read A or C frequency weighting Fast or slow time weighting Autoranging...

Страница 5: ...ols indicators and connectors on the front and right side of the DSM8925 Familiarize yourself with their positions and functions before moving on to the setup procedure 1 The DSM8925 s controls indica...

Страница 6: ...ear in the display window at various times 2 All possible display indications and their meanings REC Meter is in Recording mode tracking maximum and minimum sound level measurements MAX Digital readou...

Страница 7: ...ow on charge and should be replaced A Meter is applying A frequency weighting to inputs C Meter is applying C frequency weighting to inputs dB Sound level unit accompanies reading at its left 40 Range...

Страница 8: ...display will take a few seconds to stabilize and then begin reading out real time sound level measurements Note how the digital numbers and the readings from the analog bar graph track each other At...

Страница 9: ...30 dB When the meter is powered on it automatically enters Autoranging mode In this mode it automatically switches to the range that displays the input with the finest resolution For example the meter...

Страница 10: ...he four ranges Accordingly the first Range Baseline number displayed could be 40 60 80 or 100 For the highest display resolution the low end of the range you choose should be just below the quietest s...

Страница 11: ...ime constant and A frequency weighting Fast time weighting with a response time of 200 milliseconds simulates the response time of the human ear and is better for measuring the volume of singular even...

Страница 12: ...eighting press the A C button The letter at the right of the display will change from A to C To switch back to A frequency weighting press the A C button again STORING AND RECALLING MIN AND MAX READIN...

Страница 13: ...inues to measure real time sound level inputs and to display its results on the analog bar graph To repeat the process press and hold the REC button briefly This does not begin a new recording session...

Страница 14: ...gnal available via a jack on the right side of the unit into a chart recorder or data logger To disable Auto Power Off first power off the meter by pressing the button Then power on the meter in a spe...

Страница 15: ...ined on p 9 Changing the response time is unnecessary However make sure that C weighting is chosen and that that the meter is not operating in MAX HOLD mode To calibrate the meter insert its microphon...

Страница 16: ...Refresh Period Frequency Range 31 5 Hz to 8 kHz Display Window Size 1 18 W x 1 38 H in 30 x 35mm Digit Height 0 6 in 15 2mm Microphone 0 5 in 12 7mm Diameter Type Electret condenser Battery Life 60 ho...

Страница 17: ...General s DSM8925 Digital Sound Level Meter with Jumbo Display is warranted to the original purchaser to be free from defects in material and workmanship for a period of one year Subject to certain r...

Страница 18: ...mited to any claims for loss of profits RETURN FOR REPAIR POLICY Every effort has been made to provide you with a reliable product of superior quality However in the event your instrument requires rep...

Страница 19: ...__________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________________________ ________________...

Страница 20: ...431 6100 FAX 212 431 6499 TOLL FREE 800 697 8665 e mail sales generaltools com www generaltools com DSM8925 User s Manual Specifications subject to change without notice 2011 GENERAL TOOLS INSTRUMENTS...