Amprobe SM-20-A Specifications
Data Sheet
SM-20-A
Sound Meter-A
The Amprobe SM-20-A Sound Level Meter has been designed
to meet the measurement requirements of safety Engineers,
Health, Industrial safety offices and quality control in various
environments. It offers two types of measurements: A weighting and C weight.
The A weighting is for general noise sound level and the C
weighting is for measuring sound level of acoustic material
control in various environments (ie 94dB 1 kHz etc...). The
SM-20-A conforms to the IEC651 Type 2,ANSI S1.4 Type 2, and
JISC1502 requirements for Sound Level Meters. Which means
the SM-20-A uses two different weighting filters required by
the IEC 651 and ANSI S1.4 Type 2: The A-Weighting and the
C-Weighting audio filtering.
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Designed to meet the measurement requirements of ■
Safety Engineers, Health, Industrial safety offices and
quality control in various environments.
A and C weightings for checking compliance with safety ■
regulations as well as acoustic analysis
Measuring ranges: A Weighting 30~130dB, C Weighting ■
35~130dB
Frequency range: 31.5Hz~8KHz ■
Display with 0.1dB steps on a 4 digit LCD ■
Slow (1 sec) and fast (125ms) response settings to check ■
peak and average noise levels
MAX/MIN recording ■
Internal memory, 14,000 records ■
Recording intervals from 1 second to 8 hours ■
PC computer download capabilities ■
Data Hold to freeze reading on digital display ■
CE, designed to meet IEC651 Type2, ANSI S1.4 Type2 ■
Amprobe® Test Tools
www.Amprobe.com
SM-20-A Sound Meter
Specifications
General Specifications
Display 4 digits LCD
Microphone 1/2 inch Electret condenser microphone
Low Battery Indication Replace battery when LCD displays “”
Power Supply 9V NEDA 1604, IEC 6F22, JIS 006P battery
Power Life Approx. 50 hrs (alkaline Battery)
Auto Power Off Approx. 5 min
Environment Indoor operation, < 2000 m
Temperature / Humidity
Operation 5°C to 40°C (41°F to 104°F); < 80% RH
Storage -10°C to 60°C (14°F to 140°F); < 70% RH
Dimension 200 x 55 x 38 mm (7.8 x 2.2 x 1.5 in)
Weight 233g. (0.5 lb.) including battery
Electrical (Audio)
Standard applied IEC 651 Type2, ANSI 1.4 Type 2
Dynamic range 50 dB
Resolution 0.1 dB, Display Update: 0.5 sec.
Time weighting FAST(125mS), SLOW(1 sec)
Frequency range: 31.5 Hz to 8 kHz
Measuring level range (Auto Range)
A Weighting: 30 to 130 dB
C Weighting: 35 to 130 dB
Accuracy ± 1.5 dB
Calibration cycle 1 year
Accessories Carrying case, windscreen, User manual, USB cable and 9V battery
Data Sheet
-EMC EN61326-1 This product complies with requirements of the following European Community Directives:
89/336/EEC (Electromagnetic Compatibility) and 73 /23 /EEC (Low Voltage) as amended by 93/68/EEC
(CE Marking). However, electrical noise or intense electromagnetic fields in the vicinity of the equipment may disturb the measurement circuit. Measuring instruments will also respond to unwanted signals that may be present within the measurement circuit. Users should exercise care and take appropriate precautions to avoid misleading results when making measurements in the presence of electronic
interference.
OPTIONAL ACCESSORIES
SM-CAL1
Sound Meter Calibrator with two output levels of 94dB and 114dB, output
frequency of 1000Hz, fits ½" microphones
Amprobe® Test Tools
website: www.Amprobe.com
email: info@amprobe.com
Everett, WA 98203
Tel: 877-AMPROBE
Amprobe® Test Tools Europe
Amprobe Test Tools Europe
Beha-Amprobe GmbH
In den Engematten 14
79286 Glottertal, Germany
Tel.: +49 (0) 7684 8009 - 0
©2009 A mprobe Test Tools. All rights re served.
4/2009 3358187 Rev B
Amprobe® Test Tools
www.Amprobe.com
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