Sound Level Meter SL-4030

Display	LCD size: 49 mm x 25.5 mm, Digit size: 21.7 mm x 8.8 mm
Function	dB (A & C weighting), Time weighting (Fast, Slow), Max. hold, AC output, DC output.
Measurement Range	A Weighting- 3 ranges, 30 to 130 dB. C Weighting- 3 ranges, 30 to 130 dB.
Resolution	0.1 dB
Accuracy (23±5 °C)	Frequency weighting meet IEC 61672 class 2, calibrating input signal on 94 dB (31.5 Hz to 8 kHz), the accuracy of frequency weighting is specified as following: 31.5 Hz – ±3.5 dB, 63 Hz – ±2.5 dB, 125 Hz – ±2.0 dB 250 Hz – ±1.9 dB, 500 Hz – ±1.9 dB, 1 kHz – ±1.4 dB 2 kHz – ±2.6 dB, 4 kHz – ±3.6 dB, 8 kHz – ±5.6 dB
Frequency	31.5 to 8,000 Hz
Microphone type	Electric condenser microphone
Microphone size	Out size, 12.7 mm Dia. (0.5 inch)
Weighting Network	Characteristics of A & C.
Range selector	3 ranges (30 to 80 dB, 50 to 100 dB, 80 to 130 dB). * 50 dB on each step, * with over / under range indicating.
Time weighting (Fast, Slow)	Fast – t= 200 ms, Slow – t = 500 ms, * “Fast” range is simulated the human ear response time. * “Slow” range is easy to get the avg. values of vibration sound level. * The “Fast” & “Slow” response range are designed to meet IEC 61672 class 2 requirement.
Calibrator	B & K (Bruel & kjaer), Multifunction Acoustic Calibrator 4226.
Output Signal	AC output – AC 0.5 Vrms corresponding to each range step. DC output – DC 0.3 to 1.3 VDC, 10 mV / per dB. Output impedance – 600 ohm.
Output terminal	3.5 mm dia. phone output terminal is provided for connection with analyzer, level recorder, tape recorder.
Operating Temperature	0 to 50°C
Operating Humidity	Less than 80% R.H.
Power Supply	006P DC 9V battery (heavy duty type) or DC 9V adapter input.
Power Consumption	Approx. DC 10 mA.
Dimension	200 x 69 x 28 mm (7.9×2.7×1.4 inch).
Weight	213 g/0.5 LB.
Accessories Included	Instruction Manual ………….. 1 PC.
Optional Accessories	94 dB sound calibrator, SC-941 94 dB/114 dB sound calibrator, SC-942 AC to DC 9V adapter. Wind shield ball, SB-01.

Large LCD display, easy to read.
Time weighting and frequency weighting meet, IEC 61672 class 2.
A & C weighting networks are conformity to standards
5″ standard out size of the microphone.
Time weighting (Fast & Slow) dynamic characteristic modes
AC / DC output for system expansion
External calibration VR
Condenser microphone for high accuracy & long-term stability
HOLD function for stored the maximum value
Warning indicator for over and under load
Low battery indicator
LCD display for low power consumption & clear read-out even in bright ambient light condition.
Used the durable, long-lasting components, including a strong, light weight ABS-plastic housing case.
Pocket and light weight design allow one hand operation.
Power by 006P DC 9V battery or DC 9V adapter