SERVICE FOR YOUR NADY AUDIO PRODUCT
(U.S.) Should your NADY AUDIO product require service, please contact the Nady Service
Department via telephone at (510) 652-2411, or e-mail at [email protected].
(International) For service, please contact the NADY AUDIO distributor in your country through the
dealer from whom you purchased this product.
OWNER’S MANUAL
DO NOT ATTEMPT TO SERVICE THIS UNIT
YOURSELF AS IT CAN BE DANGEROUS AND
WILL ALSO VOID THE WARRANTY.
DSM-1
Digital Sound
Level Meter
NADY SYSTEMS, INC. • 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608
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(4) Hold the instrument comfortably in your hand or fix on tripod and point the microphone at the
suspected noise source. The sound pressure level will be displayed.
Controls
(5) When MAX (maximum hold) mode is chosen. The instrument captures and holds the maximum
noise level for a long period using any of the time weightings and ranges.
(6) When HOLD (data hold) mode is chosen.The hold function freezes the reading in the display.
Press the HOLD button momentarily to activate or to exit the HOLD function
(7) Turn OFF the instrument and remove battery when not in use.
(1)
(9)
Calibration Procedures
(1) Make the following function switch
settings.
Display: dB, A, Hi or Lo, F
Function: A-Weighting
Response Time: FAST
Level range: 30 to 100dB(Lo) or 60 to
130dB(Hi)
Measurement mode: MAX Hold and
Data Hold Mode function disable.
(2) Insert the microphone housing
carefully into the insertion hole of the
calibrator.
(3) Open battery cover and remove the
battery to adjust the CAL94dB
potentiometer of the unit. The level
display will indicate the desired level.
Our products are all well calibrated
before shipment.
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(10)
Recommended Recalibration cycle:1
year.
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Controls
Battery Replacement
(1) WINDSCREEN
Battery Loading
Remove the battery cover on the back to install one 9V Battery.
If you operate at wind speed over 10m/sec, please put protective accessories in front of the
microphone.
(2) DISPLAY LCD
LCD readout for all information
(3) POWER ON/OFF BUTTON
Turn the meter power ON/OFF
Battery Replacement
When the battery voltage drops below the operating voltage, the “BAT” icon appears on the LCD
display. If it appears, the battery should be replaced with a new one.
(4) BACKLIGHT BUTTON
Turn the meter backlight ON/OFF
Operating Precautions
(A) Wind blowing across the microphone will bring additional extraneous noise.
When using the instrument in the presence of wind, make sure to mount the windscreen.
(5) A-WEIGHTING / C-WEIGHTING SELECT BUTTON
A — Weighting: For general sound level measurements.
C — Weighting: For checking the low-frequency content of noise.
(NOTE: if the C-Weighting level is much higher than the A-Weighting level, then there is a large
amount of low-frequency noise)
(B) Calibrate the instrument before operation if the instrument was not in use for a long time.
(C) Do not store or operate the instrument at high temperatures or a high humidity environment.
(D) Keep microphone dry and avoid severe vibration.
(6) TIME WEIGHTING SELECT BUTTON
F — (Fast Response): For normal measurements (fast varying noise)
S — (Slow Response): For checking average level of fluctuating noise
(7) LEVEL RANGE SELECT BUTTON
(E) Please remove the battery when not in use.
Lo — 30~100dB; Hi — 60~130dB
When “OVER” is indicated, the ranges switch to another range of measurement.
(8) MAX / DATA HOLD BUTTON
MAX — Hold position is used to measure the maximum level of sounds. The maximum measured
level is up dated continuously. Pressing the button once again will release the hold and allow a
further measurement.
Data Hold — Press and hold the button for over 2 second to turn on or off data hold function.
The hold function freezes the reading in the display.
(9) MICROPHONE
Measurement
(1) Install a fresh 9-volt battery in the battery compartment.
(2) Turn on power and select the desired response time and weighting. If the sound source consists
of short bursts or you are only catching sound peaks, set the response to FAST. To measure
average sound, use the slow setting.
Select A-weighting for general noise sound level and C-weighting for measuring sound level of
acoustic material.
1/2” Electret Condenser microphone
(10) BATTERY COMPARTMENT
(3) Select desired Level Range
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