884-2 & 886-2 Sound/Noise Measuring Systems 884-2 Sound Level Meter • Rugged solid-state reliability • "A" weighting • Battery Operated 886-2 Multi Weight Sound Level Meter • Rugged solid-state reliability • "A" , “B” and “C” weighting • Detachable microphone • Fast and slow response 890-2 Calibrator Sound pressure level calibrators are used before or after taking measurements with sound level meters and noise dosimeters. The 890-2 can adjust Simpson models 886-2 and 884-2 or other sound level meters with a 1" diameter Microphone. The 890-2 provides a constant 94 dB or 114 dB sound pressure level at 1 KHz (0 dB = 0.0002Mbar). Calibrator is immune to a wide range of temperature and humidity conditions while maintaining tight output level toleran

884-2 & 886-2 Sound/Noise Measuring Systems Extra Microphone for 886-2 Catalog No. 00183 Microphone Cable for 886-2 Catalog No. 00198 Tripod Mount Microphone Holder Catalog No. 00184 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 comes with the output jacks that will supply an AC RMS or DC Volt signal. • Meets IEC 651 and ANSI S1.4-1983 type 2 instruments. • Meets OSHA and Walsh-Healy Noise Control...

884-2 & 886-2 Sound/Noise Measuring Systems 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...

884-2 & 886-2 Sound/Noise Measuring Systems 884-2 Type S2A / 886-2 Type 2 Specifications GENERAL Physical Weight Construction 3.0" x 8.2" x 1.9" (77 x 208 x 47mm) 1.25 lbs (.57kg) Molded ABS Plastic Housing POWER REQUIREMENTS Battery Type (1) 9V NEDA 1604A Battery Life 40 hrs. (approx) TEMPERATURE RANGE Operating Storage Temp. Influence Operating Humidity SOUND LEVEL Ranges Reference Accuracy Weighting MICROPHONE Type Impedance Characteristics SIGNAL OUTPUT External Filter RMS Output dB Output Calibration METER MOVEMENT Type Scale Accuracy Response Time OUTPUT JACK Type 40 to 140 dB 0dB = 20µ...

884-2 & 886-2 Sound/Noise Measuring Systems Model 890-2 Calibrator Specifications ACCOUSTIC OUTPUT Frequency Sound Pessure Level ACCURACY Frequency Sound Level Distortion Reference POWER REQUIREMENTS Battery Type Battery Life ENVIRONMENTAL Operating Temperature Output Temperature Coefficient Relative Humidity Relative Conditions PHYSICAL Construction Dimensions Weight Aluminum housing 5 1/4" long x 2" diameter, (131 mm long x 50 mm diameter) 13.5oz (0.35kg)