Sound

	884-2 TYPE S2A	886-2 TYPE 2		899 TYPE 2 IMPULSE
General
Physical	3.0" x 8.2" x109" (77 x208 x47mm)
Weight	1.25 lbs (.57kg)
Construction	Molded ABS Plastic Hosing
Power Requirements
Battery type	(!) 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 @1 KHz
Operating Humidity	± 0.5 dB 0 to 90%
Sound Level
Ranges	40 to 140 dB
Reference	0dB=20m Pascals
Accuracy	meets ANSI S1.4-1983
Weighting	"A" ( External Filter for flat responce) "B"		A,B,C, (external filter for flat response)
Microphone
Type	Condenser type L size per ANSI S1.2-1967
Impedance	350 ohm ±20% @23° C
Characteristics	Omnidirectional. angle of incidence approximates random response equal to 70° C
Signal Output
External Filter	120mV RMS at meter reading of +10dB
RMS Output	1.00V RMS at meter reading of +10dB
db Output	1.5VDC at meter reading of +10dB
Calibration	Frequency = 1000Hz @ 94dB range, 114 dB on the 110 dB range Screwdriver adjustable from the side of the case.
Meter Movement
Type	Pivot & Jewel, 2½" diameter
Scale	-10 to+10 dB w(15) dB Markings
Accuracy	2%
Response Time	Slow = 2.5 dB to a 500ms tone burst of 100Hz Fast = 2.0 dB to a 200ms tone burst fof 100 Hz		Impulse= 5.5 dB to a 20ms tone burst of 1000 HZ
Output Jack
Type	Switchraft # 750 (0.141" diam) f/external filter, # 850 (0.097" diam) f/dB and RMS output
External Filter	Simpson Model 898 Octave Band Filteer

Acoustic Ouput	Model 890-2	Model 896	Center Frequencies	31.5Hz, 63Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz.
Frequency	1000Hz ± 1%	125Hz. 250Hz, 500Hz; 1000Hz, 2000Hz	Roll off	-3dB at 0.707 fm and 1.414 fm points, -20dB down per octave from center freq. (fm)
Sound Pressure Level	94dBm 114dB		Ripple	1dB max, peak to valley
Accuracy			Insertion Loss	+0.5dB
Frequency	± 1%	± 2%	Calibration	externally adjustable
Sound Level	± 0.5dB at reference condition		Gain	0dB, 10dB, +20dB (selectable)
Distortion	<2%	<5%	Input Signal Level	240mV RMS max.
Reference	0dB = 0.0002m bar		Batery Type	(!) 9v NEDA 1604A
Power Requirements			Battery Life	40 hours (approx.)
Battery Type	(!) 9v NEDA 1604A
Battery Life	35 hours (approx.)
Environment
Operating Temperature	-0° to 50° C
Output Temperature Coefficient	<0.05db/° C	<0.02db/° C
Relative Humidity	0.90%
Relative Conditions	23°C. 760mmHg. 30-50% relative humidity	23°C. 760mmHg. 30-60% relative humidity
Physical
Construction	Aluminum Housing
Dimensions	5".25 long x 2" diam, (13 x 5cm)	5".9" long x 2" diam, (15 x 5cm)
Weight	14 OZ (400G)	15 OZ (425G)