Nady Systems Digital Sound Level Meter DSM-1 - Manual (Page 2)

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)
Specifications
7
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
Introduction
Introduction ......................................................................................................................... 2
Controls ............................................................................................................................... 3
Battery Replacement .......................................................................................................... 5
Operation Precautions ........................................................................................................ 5
Measurement ...................................................................................................................... 5
Calibration Procedures ....................................................................................................... 6
Specifications ..................................................................................................................... 7
Contents
2
DSM1_manual_book 1/21/32, 10:55 PM 4-5