Mini Sound Meter 850014 Instruction Manual
TABLE OF CONTENTS 1. INTRODUCTION . . . . . . . . . . . . 2 2. P ANEL DESCRIPTION . . . . . . . . . 3 3. OPERATING INSTRUCTIONS . . . . . 4 3-A. Measuring Procedures . . . . . . 4 3-B. Hold Function . . . . . . . . . . . 5 3-C. Min/Max Function . . . . . . . . . 5 3-D. Calibration . . . . . . . . . . . . . 6 4. AUTO POWER OFF . . . . . . . . . . 6 5. SPECIFICATIONS . . . . . . . . . . . 7 6. OPTIONAL ACCESSORIES . . . .
2. PANEL DESCRIPTION 1.Windscreen 2. Microphone (remove windscreen to expose the microphone tip) 3. LCD Display 4. A/C (weighting) 5. Hold 6. Fast/Slow (response) 3 7. Backlight 8. Max/Min 9. Power 10.
3. OPERATING INSTRUCTIONS Keep the microphone dry and avoid strong vibrations. Use the WINDSCREEN (1) at wind speeds over 10m/sec. 3-A. MEASURING PROCEDURE • T urn the meter on by pressing the POWER (9) button. The meter defaults to the A frequency and FAST response. • P ress the A/C (4) button to toggle between frequency scales. The A scale is shown as “dBA” and the C scale is shown as “dBC”. Select the A scale to simulate the human ear’s response. A is generally used for environmental measurements.
3-B. HOLD FUNCTION With the meter on, press the HOLD (5) button to display “HOLD” and the last dB reading. Press HOLD (5) again to exit this function. 3-C. MAX/MIN FUNCTION The Max/Min dB readings are continually updated as soon as the meter is turned on. These readings are reset when you exit the Max/Min function, or when the meter is turned off. • W ith the meter on, press the MAX/MIN (8) button once to display “MIN” and the minimum recorded dB level.
3-D. CALIBRATION Use Sper Scientific Acoustical Calibrator 850016 (or equivalent) to calibrate the meter. Perform the calibration at temperatures between 58~78°F (15~25°C). The calibrator and meter should be at the same temperature. • R emove the WINDSCREEN (1) and turn on the meter by pressing the POWER (9) button. • Turn the acoustical calibrator on to 94.0 dB and place it onto the MICROPHONE (2). • With the meter in FAST response mode and A (dBA) weighting, press and hold the A/C (4) button.
5. BATTERY REPLACEMENT + • T urn off the meter when the low battery icon is displayed. • Slide BATTERY COMPARTMENT (10) cover down to install a fresh 9V battery. • Replace the cover. • Expected battery life is about 50 hrs. 6. SPECIFICATIONS Display 3/4” high digits, 4-digit LCD, display updates every 0.5 seconds. Range dynamic range: 50dB auto-ranging: 30~130d B A (dBA) weighting: 30~130dB C (dBC) weighting: 35~130dB Resolution 0.1dB Accuracy ±1.5dB Frequency 31.
7. OPTIONAL ACCESSORIES 850016 Acoustical Calibrator 840091 Windscreen 850000 Rubber Boot 8. WARRANTY Sper Scientific warrants this product against defects in materials and workmanship for five (5) years from the date of purchase, and agrees to repair or replace any defective unit without charge. If your model has since been discontinued, an equivalent Sper Scientific product will be substituted if available. This warranty does not cover damage resulting from accident, misuse, or abuse of the product.
