Installation Guide

Class 1 Sound Level Meter
with Excel-Formatted Data Logging SD Card
General Tools & Instruments
80 White Street, New York, NY 10013-3567
TEL: [phone] TOLL FREE: 800. 697. 8665
[e-mail] www.generaltools.com
• Hard carrying case
• Sound wind shield ball
• 2 GB SD memory card
• User’s manual
Optional Accessories:
• 9VDC adapter for
110V power supply
(General P/N AC1)
• SDRD1 - SD Card Reader
Included Accessories:
Specifications:
Embedded Microcontroller: Custom one-chip LSI device
Display Type: LCD with green backlight
Display Size: 2.05 x 1.5 in. (52 x 38mm)
Parameter Measured: dB
Frequency Range: 31.5 Hz to 16 kHz
Measurement Range:
• 30 to 130 dB in auto ranging mode
• User can also select fixed range of 30 to 80 dB,
50 to 100 dB, or 80 to 130 dB
Measurement Weighting:
• By frequency: using Class I IEC 61672 standard;
frequency weighing uses “A” or “C” standard
• By time: using Class 1 IEC 61672 standard; time weighting
is fast or slow (200 ms or 500 ms response time)
Measurement Accuracy:
• With “A” frequency weighting: ± 2.0 dB @ 31.5 Hz, 1.5 dB
@ 63 Hz, 1.5 dB @ 125 Hz,
1.4 dB @ 250 Hz, 1.4 dB @
500 Hz, 1.1 dB @ 1 kHz, 1.6
dB @ 2 kHz, 1.6 dB @ 4 kHz,
+2.1 dB and -3.1dB @ 8
kHz; +3.0 dB and -6.0 dB @
12.5 kHz, +3.5 dB and
-17.0 dB @ 16 kHz
Measurement Resolution: 0.1 dB
Data Logging Sampling Time: 1 second to 1 hour
Settable Parameters: Date, time, auto power off, beep sound,
sampling time, decimal point or comma
decimal division, “A” or “C” frequency
weighting, fast or slow time weighting
Storable/Recallable Readings: Maximum, minimum
SD Card Capacity: 1 GB to 16 GB
Operating Temperature: 32° to 122°F (0° to 50°C)
Operating Relative Humidity: 0 to 85%
Power Consumption:
•
8 mADC (normal operation, with backlight off and
SD card not saving data)
• 14 mADC with backlight on and card saving data
• 44 mADC with backlight on and card saving data
Dimensions of Meter:
9.65 x 2.68 x 1.77 in. (245 x 68 x 45mm)
Weight of Meter: 1.08 lb. (489g)
Power Source:
Six “AA” batteries or optional 9-VDC AC adapter
12
No. DSM403SD
• Measures sound levels of machinery or an environment
• Big (2.5 in. diagonal) front-panel green backlit LCD is easy to read
• Makes measurements in auto ranging mode or within a manually settable range
• Displays maximum and minimum readings and holds any reading
• Performs automatic data logging at sampling time settable from 1 second to 9 hours
• Also supports manual logging and changing of card storage location
• Auto power off function
Features: