SL-4001 SOUND LEVEL METER
IEC 61672 class 2
SOUND LEVEL METER
Model : SL-4001 ISO-9001, CE, IEC1010
FEATURES
- Large LCD display, easy to read.
- Frequency weighting networks are designed to meet the IEC 61672 CLASS 2.
- A & C weighting networks are conformity to standards.
- Time weighting(FAST & SLOW) dynamic characteristic modes.
- AC/DC output for system expansion.
- Build in adj. VR is available for easy calibration.
- Condenser microphone for high accuracy & long-term stability.
- 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.
- Small and light weight design allow one hand operation.
- Low battery indicator.
SPECIFICATIONS | |
Display | 18mm (0.7") LCD (Liquid Crystal Display), 3 1/2 digits. |
Function | dB (A & C frequency weighting), Time weighting(Fast, Slow), Max. hold, AC & DC output. |
Measurement Range | 3 ranges, 30 to 130 dB, input signal only. |
Resolution | 0.1 dB. |
Accuracy (23 ± 5 ℃) | Frequency weighting meet IEC 61672 class 2, calibrating input signal on 94 dB(31.5 Hz to 8 kHz), then 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 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 8,000 Hz. |
Calibrator | B & K (Bruel & kjaer), multi-fuction acoustic calibrator, model : 4226. |
Microphone type | Electric condenser microphone. |
Size of microphone | 1/2 inch standard size. |
Range selector | 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 weighting. "Slow" range is easy to get the average values of vibration sound level. |
Calibration | * Build in external calibration VR, easy to calibrate by external screw driver. * Internal oscillation system, 1 KHz sine wave generator. |
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. Out put impedance - 600 ohm. |
Output terminal | 3.5 mm 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 | 006P DC 9V battery ( heavy duty type ). |
Power Consumption | Approx. DC 6mA. |
Dimension | 205 x 80 x 35 mm ( 8.1 x 3.2 x 1.4 inch). |
Weight | 280 g/0.62 LB (including battery). |
Standard Accessories | Instruction Manual ...............................................1 PC. Calibration screw driver................................. 1 PC. |
Optional Accessories | 94 dB Sound Calibrator, Model : SC-941. |
94 dB/114 dB Sound Calibrator, Model : SC-942. | |
Hard carrying case, Model : CA-06. | |