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 |
Frequency weighting meet IEC 61672 class 2, calibrating input signal on 94 dB(31.5 Hz to 8
(23 ± 5 ℃) 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 – t= 200 ms, Slow – t = 500 ms,
(Fast & Slow) * “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. |
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