Measurement Law Common Sound Level Meter

 IEC   606651：1979　60804：2000  TYPE II

 IEC/CDV  61672-1  CLASS2

 Instantaneous value : Lq

 Equivalent noise level : Leq, Lmax, Lc peak

 Measuring time : 10 sec, 1, 5, 10, 15, and 30 min, 1, 8, 12, and 24 hrs

 Manual Max. measuring time: 199 hrs 59 min 59 sec

 A-weighting 30 - 130dB, C-weighting 36 - 130dB, Z- weighting 40 - 130dB

 A-weighting 22dB or less, C-weighting 30dB or less, Z-weighting 32dB or less

 75 dB or more

 60 - 130dB, 30 - 100dB

 20 - 8000Hz

 7052NB  1/2” electret condenser Microphone

 Frequency correction

 circuit

 A-weighting, C-weighting, and Z-weighting

 Effective value detecting

 circuit

 Genuine effective detecting circuit (digital computing method)

 Fast (125ms), Slow (1s)

 41kHz (24uS)

 Digital form

 Stores instantaneous values or computed values in memory

 Data capacity 4kB

 LCD with backlight, Numerical value: 4-digit display, Display cycle: 1 sec, Bar 

 display Display cycle: 0.1 sec, Warning Over : Overload signal (displayed when

 the value exceeds a range), Under: Under-load signal, displayed when the value

 falls under a range, Battery voltage: 4-level residual display

 AC output: AC/DC OUT connector, Output voltage: Approx.1Vrms (FS), Output

 resistance: Approx.600W, Load resistance: 100kW or more, DC output: AC/DC

 OUT connector, Output voltage: Approx.2.5V (FS), 0.25V/10dB, Output

 resistance: Approx.600W, Load resistance: 100kW or more

 Sound level meter control and data output by computer (direct output to printer)

 Interface: RS-232C (asynchronous), Data length: 8 bit, Stop bit: 2 bits, Parity: 

 None, Transmission speed: 4800, 9600, 19200

 2 AAA batteries or AC adapter, Battery life: approx. 7 hrs (alkaline AAA

 batteries)

 Opening temperature

 range

 -10-50°C, 30%-90%RH (no condensation)

 6.6” x 1.9” x 0.9” (168×48×23.5mm), Approx. 4.4oz (125g) (w/ batteries)