SL-4022 SOUND LEVEL METER
Frequency and time weighting meet IEC 61672, Class 1
SOUND LEVEL METER
Model : SL-4022 ISO-9001, CE, IEC1010
FEATURES
- Frequency weighting and time weighting are meet IEC 61672 Class 1.
- Large LCD display, easy to read.
- A & C weighting networks are conformity to standards.
- FAST & SLOW dynamic characteristic modes.
- AC output for system expansion.
- Build in adj. VR, available for easy calibration.
- Condenser microphone for high accuracy & long-term stability.
- Build max. hold reset switch.
- Max. Hold function for stored the maximum value on display.
- Warning indicator for over and under load.
- 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.
- Compact and heavy duty housing case.
- Low battery indicator.
SPECIFICATIONS | |
Display | 1 8 mm (0.7") LCD (Liquid Crystal Display), 3 1/2 digits. |
Function | dB (A & C frequency weighting), Time weighting (Fast, Slow), Max. hold, Max. hold reset, AC output. |
Measurement Range | 3 ranges ( 30 - 70 dB, 60 - 100 dB, 90 - 130 dB ). |
Resolution | 0.1 dB. |
Accuracy (23 ± 5 ℃) | Frequency weighting meet IEC 61672 class 1, calibrating input signal on 94 dB the accuracy of frequency weighting is specified as following: 31.5 Hz : ± 2.0 dB, 63 Hz : ± 1.5 dB, 125 Hz : ± 1.5 dB 250 Hz : ± 1.4 dB, 500 Hz : ± 1.4 dB, 1 KHz : ± 1.1 dB 2 KHz : ± 1.6 dB, 4 KHz : ± 1.6 dB, 8 KHz : + 2.1 dB to -3.1 dB |
Frequency Weighting Network | Characteristics of A & C. |
A weighting - The characteristic is simulated as "Human Ear Listing" response. Typical, if making the environmental sound level measurement, always select to A weighting. | |
C weighting - The characteristic is near the "FLAT" response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment. | |
Frequency | 31.5 Hz to 16 KHz. * Accuracy is tested within 31.5 Hz to 8 KHz. |
Calibrator | B & K (Bruel & kjaer), multi-fuction acoustic calibrator, model : 4226. |
Microphone | Electric condenser microphone. |
Size of microphone | 1/2 inch standard size. |
Range selector | 30 to 70 dB, 60 to 100 dB, 90 to 130 dB, 40 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 weighting. "Slow" range is easy to get the average values of vibration sound level. * The "Fast" & "Slow" time weighting range are designed to IEC 61672 class 1 requirement. |
Output Signal | AC output - AC 750 mVrms corresponding to each range step. |
Calibration | Build in external calibration VR, easy to calibrate on 94 dB level by screw driver. Internal oscillation system, 1 KHz sine wave generator. |
Output Terminal | 3.5 mm dia. phone output terminal is provided for connection with analyzer, level recorder, tape recorder. |
Operating Temp. | 0 ℃ to 50 ℃ ( 32℉ to 122℉ ). |
Operating Humidity | Less than 80% RH. |
Power Supply | DC 9V battery x 2 PCs, 006P, MN1604 ( PP3 ) or equivalent, heavy duty or alkaline type. |
Power Consumption | Approx. DC 17 mA. |
Dimension | 260 x 87 x 36 mm ( 10.2 x 3.4 x 1.4 inch ). |
Weight | 405 g/0.99 LB |
Standard Accessories | Instruction Manual.................................................... 1 PC. Calibration screw driver............................................ 1 PC. Carrying case........................................................... 1 PC. |
Optional Accessories | 94 dB Sound Calibrator, model : SC-941. 94/114 dB Sound Calibrator, model : SC-942. Wind shield ball, model : SB-01. |
SOUND LEVEL METER CALIBRATOR, Model : SC-941, SC-942
SPECIFICATIONS | ||
Futures | Precision 94 dB/1000 Hz sound calibrator, useful to calibrate Sound Level Meter. | |
Frequency | 1000 Hz ± 2 %. | |
Sound Pressure Level | SC-941 | 94 dB : ± 0.75 dB. |
SC-942 | 94 dB : ± 0.75 dB, 114 dB : ± 0.9 dB. | |
Microphone Type | 0.5" microphone & 1" microphone. | |
Size | Round 50 mm dia. x 145 mm. | |