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Digital Sound Level Meter

Product Code : EL-PLE-11892

Features:

• Large LCD display, easy to read

• Frequency weighting networks are designed to meet the IEC 651 type 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

Technical Specification:

• 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 651 type 2, calibrating input signal on 94 dB(31.5 Hz to 8 kHz), then the accuracy of A weighting is specified as following:

• 31.5 Hz - ± 3 dB, 63 Hz - ± 2 dB, 125 Hz - ± 1.5 dB

• 250 Hz - ± 1.5 dB, 500 Hz - ± 1.5 dB, 1 kHz - ± 1.5 dB

• 2 kHz - ± 2 dB, 4 kHz - ± 3 dB, 8 kHz - ± 5 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: 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