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Summary of Contents for Center 320
- Page 1 OUND LEVEL METER Center Technology Corporation...
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Page 2: Table Of Contents
Title Page I. Safety Information……..………………1 II. General Description……..…………….2 III. Specifications…..……………………….2 IV. Name And Functions…..………….….5 V. Calibration Procedures….……………9 VI . Measurement Preparatio.n………..10 VII. Operating Precautions…….………..11 VIII. Measurement…..………………….…..12... -
Page 3: Safety Information
SOUND LEVEL METER I. Safety Information Read the following safety information carefully before attempting to operate or service the meter. Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired. Environment conditions Altitude up to 2000 meters Relatively humidity 90% max. -
Page 4: General Description
SOUND LEVEL METER II. General Description Thank you for using our Sound Level Meter. To ensure that you can get the most from it, we recommend that you read and follow the manual carefully before use. This unit conforms to the IEC651 type2, ANSI S1.4 Type2 for Sound Level Meters. - Page 5 SOUND LEVEL METER Display : LCD Digital display : 4 digits Resolution: 0.1dB Display Updata: 0.5 sec. Time weighting : FAST ( 125mS ), SLOW ( 1 sec. ) Level ranges : Lo: 30 - 80 dB Med: 50 - 100 dB Hi: 80 –...
- Page 6 SOUND LEVEL METER AC adapter : Voltage 9 V ( 8-15V Max ) Supply current: > 30mA Socket: pin → Ground Casing → Positive External Diameter → 3.5mm Internal Diameter → 1.35mm Operation temperature : 0 to 40℃ ( 32 to 104℉ ) Operation humidity : 10 to 90%RH Storage temperature...
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Page 7: Name And Functions
SOUND LEVEL METER IV. Name And Functions... - Page 8 SOUND LEVEL METER Windscreen If you operate at wind speed over 10m/sec, please put protective accessories in front of the microphone. Display SYMBOL FUNCTION 4 digits Maximum Value hold Minimum Value hold Over range Under range FAST Fast response SLOW Slow response A-Weighting C-Weighting...
- Page 9 SOUND LEVEL METER MAX / MIN hold switch Press button to enter the maximum and minimum recording mode. Select the proper Level range before using MAX/MIN to ensure that reading value will not exceed the measurement range. Press once to select MAX value. Press again to select MIN value, and press again to select current Value with “...
- Page 10 SLOW : for checking average level of fluctuating noise. SOUND LEVEL METER Microphone 1/2 inch Electret Condenser microphone CAL potentiometer Calibration control , For level calibration adjustment. AC output terminal 1 Vrms Corresponding to each range step. Output impedance ≒ 50Ω Output signal by standard 3.5mm coaxial socket signal on pin.
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Page 11: Calibration Procedures
Battery Cover SOUND LEVEL METER V. Calibration Procedures Using a standard Acoustic Calibrator (94dB , 1KHz Sine wave ) Acoustic Calibrator Screwdriver... -
Page 12: Measurement Preparation
SOUND LEVEL METER (1) Make the following switch settings. Display : dBA Time weighting : FAST Measurement mode : MAX MIN Mode function disable. Level range : 50 to 100dB (2) Insert the microphone housing carefully into the insertion hole of the calibrator. -
Page 13: Operating Precautions
SOUND LEVEL METER VII. Operating Precautions (1) Wind blowing across the microphone would bring additional extraneous noise. Once using the instrument in the presence of wind , it is a must to mount the windscreen to not pick up undesirable signals. -
Page 14: Measurement
SOUND LEVEL METER VIII. Measurement (1) Open battery cover and install a 9-volt battery in the battery compartment. (2) Turn on power and select the desired response Time and weighting. If the sound source consists of short bursts or only catching sound peak, set response to FAST. - Page 16 CENTER TECHNOLOGY CORP. 4 / F NO. 415, Jung-Jeng Rd., 238 Shu-Lin Chien, Taipei, Taiwan E-Mail : center@centertek.com http : / / www.centertek.com 320-01...
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