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Summary of Contents for Center 321
- Page 1 OUND LEVEL METER FAST SLOW LEVEL Lo = 80 dB Med= 100 dB Hi = 130 dB Auto= 130 dB IEC 651 TYPE II POWER-UP OPTIONS CENTER TECHNOLOGY CORP.
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Page 2: Table Of Contents
CONTENTS Title Page SAFETY INFORMATION………..………..………….. 1 Environment conditions………………………………..1 Maintenance & Clearing……………………………….1 Safety symbols………………………………………… 1 II. GENERAL DESCRIPTION……………………..…….. 2 III. SPECIFICATIONS..…………………..……………….. 3 IV. NAME AND FUNCTIONS..………….……………….. 5 V. AUTO POWER OFF……….………………….……… 6 VI. CALIBRATION PROCEDURES….………………….. 7 VII . MEASUREMENT PREPARATION………….………. 7 VIII. -
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: Specifications
SOUND LEVEL METER III. SPECIFICATIONS Standard applied : IEC651 Type2, ANSI S1.4 Type2. Frequency range : 31.5Hz ~ 8KHz Measuring level range : 30 ~ 130dB Frequency weighting : A / C Microphone : 1/2 inch electret condenser microphone Display : LCD Digital display : 4 digits Resolution: 0.1dB Display Update: 0.5 sec. -
Page 5: Name And Functions
SOUND LEVEL METER Electromagnetic Compatibility: RF field = 3V/m Total accuracy = specified accuracy + 0.5dB Operation temperature : 0 to 40℃ ( 32 to 104℉ ) Operation humidity : 10 to 90%RH Storage temperature : -10 to 60℃ ( 14 to 140℉ ) Storage humidity : 10 to 75%RH Dimensions : 275 (L) ×64 (W) ×30 (H)mm 10.8 (L) ×2.5 (W) ×1.2 (H)inch... - Page 6 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 indication Minimum indication Over range Under range FAST Fast response SLOW Slow response A-Weighting C-Weighting...
- Page 7 SOUND LEVEL METER ○ MAX / MIN hold button 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.
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Page 8: Auto Power Off
SOUND LEVEL METER ○ Signal output terminal AC: 1 Vrms Corresponding to each range step. Output impedance ≒ 100Ω Output signal by standard 3.5mm coaxial socket signal on pin. Note: At “Auto” level range, output signal is Auto select on “Lo” or “Med” or “Hi”... -
Page 9: Calibration Procedures
SOUND LEVEL METER VI. CALIBRATION PROCEDURES Using a standard Acoustic Calibrator ( 94dB , 1KHz Sine wave ) Acoustic Calibrator FAST Screwdriver SLOW LEVEL Lo = 80 dB Med= 100 dB Hi = 130 dB Auto= 130 dB IEC 651 TYPE II POWER-UP OPTIONS (1) Make the following switch settings. -
Page 10: Operating Precautions
SOUND LEVEL METER (3) AC Adapter Connection When the AC adapter is used , insert the plugs of the adapter into the DC9V connector on the side panel. VIII. OPERATING PRECAUTIONS Wind blowing across microphone would bring additional extraneous noise. When using the instrument in the presence of wind , it is a must to mount the windscreen to not pick up undesirable signals. - Page 11 CENTER TECHNOLOGY CORP. 4 / F NO. 415, Jung-Jeng Rd., 238 Shu-Lin, Taipei, Taiwan TEL: 886-2-26763926 E-Mail : center@centertek.com FAX: 886-2-26763925 http : / / www.centertek.com 321-00 Distributor in Australia Pacific Sensor Technologies Pty Ltd Unit 4, 3 Neutron Place Rowville, VIC 3178 Australia 1300 662 720 | sales@pacificsensortech.com.au...
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