Simpson 886-2 Operator's Manual
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Simpson 886-2 Operator's Manual

Sound level meter
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Simpson Model 886-2
Sound Level Meter
OPERATOR'S MANUAL

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Summary of Contents for Simpson 886-2

  • Page 1 Simpson Model 886-2 Sound Level Meter OPERATOR’S MANUAL...
  • Page 2 SIMPSON ELECTRIC COMPANY neither assumes nor autho- rizes any other persons to assume for it any other liability in connection with the sales of its products.
  • Page 3 NOTES...

  • Page 4: Table Of Contents

    Contents 1. INTRODUCTION .................. 7 General Description ................7 Specifications ..................7 Items Furnished With The Instrument ..........9 Available Accessories ................ 9 2. INSTALLATION ................10 Unpacking And Inspection ............... 10 Shipping ................... 10 Service ....................10 Battery Installation Or Replacement ..........10 Installation ..................
  • Page 5 NOTES...
  • Page 6 NOTES...

  • Page 7: Introduction

    Safety and Health Act of 1970 (OSHA) and the Walsh-Healy Act, except for direct measurement of impact (impulse) noise. The 886-2 can be hand-held for rapid testing or mounted on a tripod for measure- ments over extended periods of time. The microphone is detachable and can be extended from its case by use of an optional 25-foot microphone extension cable.
  • Page 8 5. Meter: Pivot and Jewel movement with 2-1/2” dial having end markings of -10 dB and +10 dB, and fifteen 1 dB scale markings. From -5 dB to +10 dB the accuracy and scale markings comply with the ANSI specification for a Type 2 instrument. 6.

  • Page 9: Items Furnished With The Instrument

    < 0.5 dB. 14. Warm-up Time: Approx. 30 seconds. Items Furnished With The Instrument All items required to operate the 886-2 are furnished with each Instrument, and are listed in Table 1-2. Table 1-2. Quantity Description...

  • Page 10: Installation

    Battery Installation Or Replacement The 886-2 is powered by a 9-volt alkaline battery. The battery is packaged sepa- rately. To install or replace the battery: Turn the range switch to the “OFF” position.

  • Page 11: Care

    30 days, remove the battery. APPLICATION This section contains basic information required for effective application of the 886-2 Sound Level Meter, and must be understood before attempting to operate the Instrument for the first time. Decibel Scale...
  • Page 12 also have defined allowable noise (undesirable sound energy) level exposure limits for persons in industrial environments. Selected and applicable parts of those currently in force are cited in this manual. Standards and government regulatory laws are subject to modification or expansion. Check for the latest available documents and information.

  • Page 13: Sound Fields

    For the 886-2 this angle is 70° (refer to Figure 3-2). When making measurements in a reverberant field, orientation of the micro- phone is not critical.

  • Page 14: Effect Of Operator's Presence

    VERTICAL ANGLE (45˚ – 70˚) other than the one being measured. The 886-2 (or its microphone) can be mounted on a tripod for further reduction in the effects of the operator’s presence. A practical arrangement is to tilt the mi-...

  • Page 15: Meter Fluctuations

    Walsh-Healy Act). NOTE: Impulse noises having durations longer than 50 milliseconds and peak levels of 140 dB will give readings higher than 125 dB. The Simpson 899 Impulse Sound Level Meter may be used to take measurements such as these.

  • Page 16: Background Noise

    Levels in dB Higher Level OPERATING INSTRUCTIONS This section contains instructions required for the operation of the 886-2 Sound Level Meter. Follow these instructions carefully to obtain accurate and useful data. If noise levels exceed 115 dB(A) (SLOW response) immediate use of protective...

  • Page 17: Precautions

    Instrument has been subjected to severe mechanical shock or environmental extremes. Operational Items And Features All items and features used to operate the 886-2 are described in Table 4-1 and illustrated in Figure 4-1. Table 4-1. Operational Items And Features...
  • Page 18 A condenser type microphone that converts sound energy vibrations into electrical sig- nals. Microphones are not interchangeable, therefore, the Instrument must be recalibrated (OSHA) BATT TEST Figure 4-1. Operational Items And Features SLOW FAST (OSHA) 886-2 TYPE S2A SOUND LEVEL METER...

  • Page 19: Sound Level Measurements

    Sound Level Measurements To obtain sound level measurements with the 886-2. Turn on the Instrument and select the desired measurement range. To en- sure accurate results, check the battery every time sound level measure- ments are made.

  • Page 20: Use With Auxiliary Equipment

    Sound Level Meter in a safe place. Use With Auxiliary Equipment The 886-2 is equipped with three outputs intended to be used with auxiliary equipment such as a chart recorder, oscilloscope or the Simpson 898 Octave Band Filter. These jacks are designed to give the operator more detailed and comprehensive sound analysis study.
  • Page 21 NOTES...
  • Page 22 NOTES...
  • Page 23 NOTES...
  • Page 24 SIMPSON ELECTRIC COMPANY 520 Simpson Avenue Lac du Flambeau, WI 54538-0099 (715) 588-3311 FAX (715) 588-3326 Printed in U.S.A. Part No. 06-115308 Edition 8, 05/07 Visit us on the web at: www.simpsonelectric.com...

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