Name: Enviro Test Construct Industrial Sound Level Tester -
SKU: ETCASLM-198

Technical Specification

Applied Standards:	GB or T3785, Class 1; IEC 61672, Class 1
Measured and evaluated items	Lp (time weighted sound level) or Lmax (maximum time weighted sound level), Lmin (minimum time weighted sound level), LCpeak (C weighted peak sound level). LP,Leq,LAE,L5,L10,L50,L90,L95,Lmax,Lmin,LCpeak,EA, etc.
Microphone:	Class 1 industrial measurement microphone, nominal diameter 0.5 in, free field type frequency response. Nominal pressure sensitivity is 50 mV/Pa (nominal pressure sensitivity level is – 26 dB, reference value is 1 V)
Frequency	10 Hz to 20 kHz
Frequency Weightings:	A, C ,Z
Time Weightings:	F(Fast) and S(Slow)
Measuring Range	A:30 to 130 dB, C:40 to 130 dB,Z: 45 dB to 130 dB
Integration time	Manual control of measurement time in the range of 5 s to 99 h, 59 min and 59 s
Automatic calibration range	±4.5 dB (reference value is 50 mV or Pa)
Screen	128 x 64 dot matrix liquid crystal display (LCD), with resolution of 0.1dB, has signs of overload, under-range, low battery voltage alarm, over-threshold alarm and so on.
Analog output	Output jack is 0.14 in (3.5 mm) dual-channel headphone jack, minimum load impedance is 10 kΩ DC logarithmic voltage: The output voltage is logarithmic to the measured sound pressure, and the output voltage per unit sound pressure is 15 mV or dB. AC Linear Voltage: The output voltage is linearly correlated with the measured sound pressure, and the output voltage corresponding to the upper boundary of the stage range is 2.0 V.
Digital output	Output connector is DB 9 (needle type), RS 232 serial communication port, output ASCII code, modulation rate (baud rate) 9600 Bd
Power supply	2 LR6 (No. 5) batteries, working continuously for 27 hours
Accessories	Main Unit, External Probe, Screwdriver, Carrying Case (B04), Manual
Size	8.27 in ×2.68 in × 1.22 in (210 mm x 68 mm x 31 mm)
Working Temperature	32 F to 104 F (0 ℃ to 40 ℃)
Weight	0.46 lb (0.21 kg)