| Circuit | Custom one-chip of microprocessor LSI; circuit. |
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| Display | LCD size : 51 mm x 30 mm; LCD with green backlight ( ON/OFF ). |
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| Measurement Range | 30 - 130 dB. |
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| Resolution | 0.1dB. |
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| Function | dB ( A & C frequency weighting ); Time weighting ( Fast, Slow ); Peak hold, Data hold; Record ( Max., Min. ). |
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| Accuracy | Characteristics of " A "," C " frequency; weighting network meet ANSI S1.4-2014 /; IEC 61672 -1 : 2013 class 1; Under 94 dB input signal, the accuracy are: 31.5 Hz ±1.5 dB; 63 Hz ±1.0 dB; 125 Hz ±1.0 dB; 250 Hz ±1.0 dB; 500 Hz ±1.0 dB; 1 K Hz ±0.7 dB; 2 K Hz ±1.0 dB; 4 K Hz ±1.0 dB; 8 K Hz +1.5 dB, -2.5dB; 12.5 K Hz +2.0 dB, -5.0dB; 16 K Hz +2.5 dB, -16.0dB; Remark : The above spec. are tested under the; environment RF Field Strength less; than 3 V/M & frequency less than 30MHz only. |
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| 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 LCD; 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. |
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| Data hold | To freeze the measurement value |
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| Peak hold | To keep the peak ( max. ) measurement value. |
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| Frequency | 31.5 to 16,000 Hz. |
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| Microphone type | Electric condenser microphone. |
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| Microphone size | Out size, 12.7 mm DIA. ( 1/2 inch). |
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| Calibration VR | Build in external calibration VR, easy to calibrate on 94 dB level by screw driver.; * Calibrated via external SOUND CALIBRATOR ( SC-942, optional ). |
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| Calibrator | B & K (Bruel & kjaer), MULTIFUNCTION ACOUSTIC CALIBRATOR Type 4226. |
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| Datalogger Sampling Time Setting range | Auto 1 second to 3600 seconds; @ Sampling time can set to 1 second, but memory data may loss.; Manual Push the data logger button once will save data one time.; @ Set the sampling time to circuit. 0 second.; @ Manual mode, can also select the 1 to 99 position ( Location ) no. |
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| Memory Card | SD memory card. 1 GB to 16 GB. |
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| Advanced setting | * Set clock time ( Year/Month/Date,Hour/Minute/ Second ); * Set sampling time; * Auto power OFF management; * Set beep Sound ON/OFF; * Decimal point of SD card setting; * SD memory card Format; * Frequency weighting to A or C setting |
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| Over Indication | Show " - - - - ". |
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| Data Output | RS 232/USB PC computer interface.; * Connect the optional RS232 cable; UPCB-02 will get the RS232 plug.; * Connect the optional USB cable; USB-01 will get the USB plug. |
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| AC output | AC 0.5 Vrms corresponding to each range step.; * Output impedance : 600 ohm |
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| Power off | Auto shut off saves battery life or manual off by push button. |
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| Operating Temperature | 0 to 50 °C |
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| Operating Humidity | Less than 85% R.H. |
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| Power Supply | * Alkaline or heavy duty DC 1.5 V battery; ( UM3, AA ) x 6 PCs, or equivalent.; * DC 9V adapter input. ( AC/DC power; adapter is optional ). |
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| Power Current | Normal operation ( w/o SD card save data and LCD Backlight is OFF) : Approx. DC 8.2 mA.; When SD card save the data but and level LCD Backlight is OFF) : Approx. DC 34 mA.; * If LCD backlight on, the power; consumption will increase approx. 6mA. |
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| Weight | 323 g/0.71 LB. |
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| Dimension | 245 x 68 x 45 mm. ( 9.6 x 2.7x 1.8 inch ). |