LONN New Portable LCD Display Digital Data Loggers Sound Level Meter Noise Level DB Meter Noisemeter Noise Measuring Meter dB Decibel Logger Tester SL4201

i.Safety Information Please read the following safety information before attempting to operate the meter. Environment Condition 1.Altitude up to 2000 meters 2.Relative humidity 75% max 3.Operation temperature from 0 - 40℃ Maintenance and Cleaning 1.Repairs or calibrations what is not covered in the manual shouldbe performed by professional person only. 2.Periodically wipe the case with a dry cloth.Do not use abrasives or solvents on this instrument. ii.specification、 Frequency range: 31.5Hz - 8KHz Measuring range: (28)30dB - 130dB Frequency Weighting: A/C Microphone: 1/2 inch polarization capacitance microphone Digital Display: 4digit LCD Resolution:0.1 dB Display Update: 2 times/sec Time Weighting: FAST 125ms SLOW 1 second Measuring ranges: Range 1: (28)30dB - 70dB Range 2: 60dB -100dB Range 3: 90dB - 130dB Accuracy: ±1.5dB(reference conditions 94dB@1kHz) Dynamic range: 40dB Overflow indicator: "OVER" will be displayed when over range, display "OL" when overflow the upper range more than 5dB. "UNDER" will be displayed when under range, display "LO" when under the lower range more than 5dB or under 28dB. MAX hold: "MAX" Data storage: 60000 samples Interface: USB interface Power: One 9V battery Power Life: Approximately 70 hours Operation Environment: 0 - 40°C(32 to 104°F) 10 -75%RH Storage Environment: -10 -50°C(14 - 122°F) 10 -80%RH Dimensions: 185(L)*65(W)*35(H)mm Weight: 155g(including battery) Accessories: instructionmanual, USB cable and driver disk Please note that because of transportation restrictions,our products may not distribute the battery!