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DIGITAL SOUND LEVEL
METER
DIGITAL SOUND LEVEL
METER
* Large LCD display, easy to read. * Hold & Memory record ( max., min. ) * Frequency weighting networks are designed to meet * Condenser microphone for high accuracy & stability. IEC 61672 type 2. * Peak Hold function for stored the maximum value. * Auto range & mamual range. * Warning indicator for over and under load. * A & C weighting networks are conformity to standards. * LCD display for low power consumption & clear read¬ * Fast & Slow dynamic characteristic modes. out even in bright ambient light condition. * AC output for system expansion. * Used the durable, long-lasting components, including * RS232 computer interface. a strong light weight ABS-plastic housing case. * Build in adj. VR is available for easy calibration. * Compact and light weight plastic housing. SPECIFICATIONS Display 52 mm x 32 mm LCD (Liquid Crystal Display), 5 digits. Function dB (A & C frequency weighting), Time weighting (Fast, Slow), Hold, Memory ( max. & min. ), Peak hold, AC & RS232 output. Measurement Range 30 - 130 dB. Resolution 0.1 dB. Accuracy Frequency weighting meet IEC 61672 type 2, calibrating input signal on 94 dB(31.5 Hz to (23 5 蚓) 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, 2kHz - ± 2 dB, 4 kHz - ± 3 dB, 8 kHz - ± 5 dB. Characteristics of A & C. Frequency A weighting - The characteristic is simulated as "Human Ear Listing" response. Typical, if Weighting Network 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-function acoustic calibrator, model : 4226. Microphone Electric condenser microphone. Size of microphone 1/2 inch standard size. Range selector Auto range : 30 to 130 dB. Manual range : 3 range, 30 to 80 dB, 50 to 100 dB, 80 to 130 dB, 50 dB on each step, with over & under range indicating. Fast - t= 200 ms, Slow - t = 500 ms, Time Weighting * "Fast" range is simulated the human ear response time weighting. (Fast & Slow) "Slow" range is easy to get the average values of vibration sound level. * The "Fast" & "Slow" time weighting range are designed to IEC 651 type 2 requirement. Output Signal * AC output - AC 0.5 Vrms corresponding to each range step. Output impedance - 600 ohm. * RS232 output. Out terminal Terminal 1 : RS232 computer interface terminal. Terminal 2 : AC output terminal. * Terminal socket size : 3.5 mm dia. phone socket. Calibration VR Build in external calibration VR, easy to calibrate on 94 dB level by screw driver. Operating Temp. 0 to 50 ( 32 to 122 ).℃ ℃ ℉ ℉ Operating Humidity Less than 80% RH. Power Supply 006P DC 9V battery ( Alkaline or heavy duty type ). Power Consumption Approx. DC 6mA. Dimension 268 x 68 x 29 mm ( 10.6 x 2.7 x 1.1 inch). Weight 295 g/0.65 LB. Standard Accessories Instruction Manual ...............................................1 PC. Optional Sound Calibrator, model : SC-941 ( 94 dB ). SC-942 ( 94dB, 114 dB ). Carrying case : CA-06 RS232 cable, Model : UPCB-02 Application software, Model : SW-U801-WIN
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