Sound Level Meter, Model 720 Sound Level Meter Family, Larson davis, Hubungi 021-70425656 - 085691309700 - Email sales_ sun.naro@ hotmail.com

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Amerika Serikat

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Transfer Bank (T/T)

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Standard

Sound Level Meter, Model 720 Sound Level Meter Family, Larson davis

Sound Level Meter, Model 720 Sound Level Meter Family, Larson davis
Specifications
Feature
Linearity range > 107 dB
Max RMS level 143 dBA ( typical)
RMS noise floor 30 dBA ( typical)
Time weighting Slow, fast, impulse
Frequency weighting A and C
Microphone 3/ 8" electret
Bias supply 0, 28, and 200 volts DC
Memory 64 KB
Communications RS-232 serial interface
DC output 0-3 volts at 600 ohms
AC output
A- weighted range 38.4 dBuV ti 128.4 dBuV
C-weighted range 36.3 dBuV to 126.3 dBuV
Linear range 36.1 dBuV to 125= 6.1 dBuV
Output impedance 600 ohms
Gain 0 or 20 dB ( user selectable)
Quartz clock/ calendar 24 hour format ( hh: mm: ss) , 1 second resolution, 100 yr calendar ( mo/ day/ yr)
Power supply
Internal 9 volt battery, 24 hour operation
External 7 to 16 VDC, 30 ma current draw
Dimensions 8.6" L x 3.3" W x 1.1" D ( with nose cone attached)
Weight 14.0 oz ( 393 gm)
Standards met ANSI S1.4 – 1983
ANSI S1.25 – 1991
IEC 651
IEC 804
Directive 86/ 188/ EEC
IEC/ TC - 29

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