Category 

Description

International standard :

IEC 61672:2013 “Sound Level Meters”
for Class 1 Class X sound level meters

performance level :

IEC61672 Class 1

Measured evaluation quantity :

LP (time weighted sound level) or Lmax
(maximum time weighted sound level),
Lmin (minimum time weighted sound level),
LCpeak (C weighted peak sound level).

Microphone :

nominal diameter of 12.7 mm and a free
field frequency response.

Frequency range : 

10 Hz to 20 kHz

Frequency weighting :

A-weighted, C-weighted

Time weighting :

F (fast response), S (slow response)

Measurement range : 

A sound level: 20 dB to 140 dB;

Threshold setting range :

20 dB to 140 dB, if the sound level exceeds
the threshold, a threshold exceeding flag is
given and a high level is output.

Automatic calibration range : 

± 4.5 dB (reference value is 50mV/Pa).

Display :

one hundred and twenty-eight × 64 dot matrix
liquid crystal display (LCD) with a resolution
of 0.1dB, with signs such as overload, under
range, low battery voltage alarm, over
threshold alarm, etc

Analog output :

The output jack is a 3.5mm dual channel
headphone jack with a minimum load
impedance of 10k Ω.

Power supply :

——DC logarithmic voltage: The output voltage is
related to the logarithm of the measured sound
pressure, and the unit sound pressure output
voltage is 15 mV/dB.

Overall dimensions :

——AC linear voltage: The output voltage is linearly
correlated with the measured sound pressure,
corresponding to an output voltage of 2.0V at the
upper boundary of the level range.

Weight :

Two LR6 (No. 5) batteries can operate continuously
for 27 hours under reference environmental
conditions.

Enclosure :

SS 304

Operating temperature : 

-10°C~50°C

Power supply :

220V or 12V

Output 

Digital