Sound Level Systems Simpson Type 2 sound level systems come in a variety of configurations to meet any noise measurement requirements. Each system is composed of several components designed to work together as one integrated test instrument and output jacks that will supply an AC RMS or DC Volt signal. • Meets IEC 651 and ANSI S1.4-1983 Meters • Meets OSHA and Walsh-Healy Noise Control Specifications • Quickly and Accurately Measures Sound Levels in Factories, Offices, Etc. • Full coverage 40-140 dB with special 85-115 dB OSHA range • Impact-resistant case contoured to minimize sound energy field reflections • Operates 40 hours on a 9V battery • AC and DC voltage jacks for recorder, analyzer and tester Interface • Built-in tripod mount The American National Standards Institute (ANSI) provides for three weighting curves: "A ", "B", and "C". The "A" weighted curve more closely corresponds to the response of the ear and is specified by OSHA. The "C" curve is essentially a “flat” frequency response and can be used in conjunction with a “fast response for an approximate indication of impulse noise levels. Low Frequency noises are better monitored by the “C” curve than the “A” curve. Low frequency sounds need to be louder to be heard. The chart below shows the relationship between frequency and relative response. | 884-2 Sound Level Meter • Rugged solid-state reliability, • "A" weighting • Battery Operated GENERAL Physical: 3.0" x 8.2" x 1.9" (77 x 208 x 47mm) Weight: 1.25 lbs (.57kg) Construction: Molded ABS Plastic Housing POWER REQUIREMENTS Battery type: (1) 9V NEDA 1604A Battery life: 40 hrs. (approx) TEMPERATURE RANGE Operating: -10° to 50°C Storage: -40° to 60°C Temp. influence: +/-0.015 dB/°C @ 1KHz Operating humidity: +/-0.5dB 0 to 90% SOUND LEVEL Ranges: 40 to 140 dB Reference: 0dB = 20m Pascals Accuracy: meets ANSI S1.4-1983 Weighting: 884-2 type S2A (only): "A" (external filter for flat response) 886-2 type 2 (only):A,B,C, (external filter for flat response) MICROPHONE Type: condenser type L size per ANSI S1.12-1967 Impedance: 350_ +/-20%@ 23°C Characteristics: omnidirectional, angle of incidence approximates random response equal to 70° SIGNAL OUTPUT External filter: 120mV RMS at meter reading of +10dB RMS Output: 1.00V RMS at meter reading of + 10dB dB Output: 1.5 VDC at meter reading of + 10dB Calibration: frequency=1000Hz @ 94dB on the 90 dB range, 114 dB on the 110 dB range. Screwdriver adjustable (from side of case) METER MOVEMENT Type: Pivot and Jewel, 2 1/2" dial; Scale: -10 to +10 dB w/(15) 1dB markings Accuracy: 2% Response time: Slow = 2.5 dB to a 500ms tone burst of 1000Hz Fast = 2.0 dB to a 200ms tone burst of 1000Hz OUTPUT JACK Type: Switchcraft # 750(0.141"dia.) f/external filter, # 850(0.097" dia.) f/dB ａnd RMS output |
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884-2&886-2 Datasheets
