Nady Systems Digital Sound Level Meter DSM-1 owner manual Introduction, Contents, Specifications

Introduction

Congratulations for purchasing the DSM-1 Digital Sound Level Meter. To ensure that you get the most from your unit, we recommend that you read and follow the manual carefully before use. This unit conforms to the IEC651 type 2, ANSI S1.4 type 2 for Sound Level Meters.

The DSM-1 has been designed to meet the measurement requirements of Safety Engineers, Health, Industrial safety offices and sound quality control in various environments.

•Highly accurate SPL meter with 2 level ranges measuring between 30dB and 130dB @ 32Hz - 8KHz

•Full professional features include easy-to-read 4-digit LCD display with selectable permanent backlight; selectable A or C weighting and Fast or Slow response; maximum Hold selector with Hold button to capture input at any time; alarm indicating the input is above range; internal battery tester; built-in calibrated, linear omnidirectional 1/2” electret condenser microphone; and threaded insert to attach to optional SMT-3 tripod or standard camera tripod

•Uses 9VDC alkaline battery with up to 50 hours battery life

•Foam windscreen, sturdy vinyl carrying case, and battery included

Contents
Introduction	2
Controls	3
Battery Replacement	5
Operation Precautions	5
Measurement	5
Calibration Procedures	6
Specifications	7
	2
DSM1_manual_book	4-5

Specifications

Standard applied	IEC651 type 2, ANSI S1.4 type 2
Frequency range	31.5Hz~8KHz
Measuring level range	30~130dB
Frequency weighting	A/C
Microphone	1/2 inch electret condenser microphone
Calibration	Electrical calibration with the internal oscillator (1kHz sine wave)
Display	LCD
Digital display	4 digits
Resolution	0.1dB
Display Up data	0.5 sec.
Time weighting	FAST(125mS), SLOW(1 sec.)
Level ranges	Lo: 30-100dB; Hi: 60-130dB
Accuracy	+ 1.5dB (under reference conditions)
Alarm function	“OVER” is show when input is out of range
Maximum hold	Hold readings the Maximum Value, with decay < 1dB/3minutes.
Auto power off	Meter automatically shuts down after approx. 15 minutes of inactivity.
Power supply	One 9V battery, 006P or IEC 6F22 or NEDA 1604.
Power life	About 50hrs(alkaline Battery)
Operation temperature	0 to 40 Ohms (32 to 104 °F)
Operation humidity	10 to 90%RH
Storage temperature	-10 to 60 °C ( 14 to 140 °F)
Storage humidity	10 to 75%RH
Dimensions	8.3” x 2.2” x 1.3” (210 x 55 x 32 mm)
Weight	8.01 oz (230g) (including battery)

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