DIGITAL SOUND LEVEL METER
Model : SL-4001
* Large LCD display, easy to read. * Max. Hold function for stored the maximum value on display.
* Frequency weighting networks are designed to meet
the * Warning indicator for over and under load.
IEC 651 type 2. * LCD display for low
power consumption & clear read-out even
* A & C weighting networks are conformity to stan
dards. in bright ambient light condition.
* Time weighting( FAST & SLOW) dynamic characteristic modes. * Us
ed the durable, long-lasting
components, including a strong,
* AC/ DC output for system expansion.
light weight ABS-plastic housing case.
* Build in adj. VR is available for easy calibration. *
Small and light weight design allow one hand operation.
* Condenser microphone for high accuracy
& long-term stability. * Low battery indicator.
Display 18mm ( 0.7" ) LCD ( Liquid
Crystal Display) , 3 1/ 2 digits.
Function dB ( A & C frequency weighting) , Time weig
hting( Fast, Slow) , Max.
hold, AC & DC output.
Measurement Range 3 ranges, 30 to 130 dB, input signal only.
Resolution 0.1 dB.
Accuracy Frequency weighting meet IEC 651 type 2,
calibrating input signal on 94 dB( 31.5 Hz to 8
( 23 ± 5 )
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
Characteristics of A & C.
Frequency A weighting - The characteristic is simulated
as " Human Ear Listing" resp
onse. Typical, if making
Weighting Network the environmental sound leve
l measurement, always select to A weighting.
C weighting - The characteristic is near the " FLAT" re
sponse. Typical, it is suitable for checking the
noise of machinery ( Q.C. check) & knowing the sound pressure level of the tested
Frequency 31.5 Hz to 8, 000 Hz.
Calibrator B & K ( Bruel & kjaer) , multi-fu
ction 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 - t= 200 ms, Slow - t = 500 ms,
( Fast & Slow) * " Fast" range is simulate
d 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.
Out terminal 3.5 phone output terminal is provid
ed for connection with anal
yzer, level recorder, tape
Operating Temp. 0 to 50 ( 32 to 122 ) .
° C° C° F ° F
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 Inst
l ............... 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
Hub mia 0856 9139 8333, 021-40911748 Email : mia_ brsinaga@ yahoo.com