Center C325 Instruction Manual
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Center C325 Instruction Manual

Mini sound level meter
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325-01 JAN. 2001

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Summary of Contents for Center C325

  • Page 1 325-01 JAN. 2001...

  • Page 2: Table Of Contents

    C O N T E N T S TITLE PAGE I. Safety Information…………………………. 1 II. General Description.…………………… 1-2 III. Specifications……………..……………… 2-3 IV. Name and Functions……………………. 4-5 V. Calibration Procedures………..………... 6-7 VI. Measurement Preparation……..……….…. 7 VII. Operating Precautions………..…………. 7-8 VIII. Measurement………………………………... 8...

  • Page 3: Safety Information

    S OUND LEVEL METER I . Sa fe t y I nfor m at ion 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 Relative humidity 90% max.

  • Page 4: Specifications

    S OUND LEVEL METER Display with 0.1dB steps on a 4-digit LCD. Two equivalent weighted sound pressure levels, A and AC signal output is available from standard 3.5mm coaxial socket suitable for a frequency analyzer, level recorder, FFT analyzer, graphic recorder , etc. I I I .
  • Page 5 S OUND LEVEL METER AC Output: 1 Vrms at FS ( full scale ). Output impedance : Approx. 100 Ohms FS: means the upper limit of each level range. Electromagnetic Compatibility: RF field = 3V/m Total accuracy = specified accuracy + 0.5dB Power Supply: One 9V battery, 006P or IEC 6F22 or NEDA 1604.

  • Page 6: Name And Functions

    S OUND LEVEL METER I V. N a m e And Func t ions...
  • Page 7 S OUND LEVEL METER...

  • Page 8: Calibration Procedures

    S OUND LEVEL METER Output impedance: 100 ohms Output signal by standard 3.5mm coaxial socket signal on pin.

  • Page 9: Measurement Preparation

    S OUND 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. (3) Turn on the switch of calibrator and adjust the CAL potentiometer of the unit .

  • Page 10: Measurement

    S OUND LEVEL METER (3) Do not store or operate the instrument at high temperature and high humidity environment. (4) Keep microphone dry and avoid severe vibration. (5) Please take out the battery and keep the instrument in low humidity environment when not in use. V I I I .

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