User’s Manual Sound Level Meter
Ⅰ. Safety information Read the following safety information carefully before attempting to operate or service the meter. Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired. Environment conditions 1 Altitude up to 2000 meters 2 Relatively humidity 90% max. 3 Operation Ambient 0~40℃ Maintenance & Clearing 1 Repairs or servicing not covered in this manual should only be performed by qualified personnel.
Ⅱ. General Description Thank you for using our Sound Level Meter. To ensure that you can get the most from it, we recommend that you read and follow the manual carefully before use. This Sound Level Meter has been designed to meet the measurement requirements of safety Engineers, Health, Industrial safety offices and sound quality control in various environments. Ranges from 40dB to 130dB at frequencies between 31.5Hz and 4 KHz. Display with 0.1dB steps on a 4-digits LCD.
Time weighting : FAST(125mS) Accuracy : + 3.5dB @1kHz, 94dB(under reference conditions) Alarm function : “OVER” is show when input is out of range(>130dB) Auto power off : Meter automatically shuts down after approx. 15 minutes of inactivity. Power supply : One 9V battery, 006P or IEC 6F22 or NEDA 1604.
① Windscreen & 1/2 inch Electret Condenser microphone If you operate at wind speed over 10m/sec, please put protective accessories on microphone. ② MAX/MIN button MAX The max. Hold position is used to measure the maximum level of sounds. The maximum measured level is up dated continuously. Press once again the button, will release the hold and allow a further measurement.
⑦ Tripod nut Hold the instrument comfortably in fix on tripod V. Measurement Preparation (1) Battery loading Remove the battery cover on the back and put in one 9V Battery. (2) Battery Replacement When the battery voltage drops below the operating voltage, mark “BAT” appears. If it appears, battery should be replaced with new one. VI. Operating Precautions (1) Wind blowing across the microphone would bring additional extraneous noise.
VII. Measurement (1) Open battery cover and install a 9-volt battery in the battery compartment. Turn on power. (2) Hold the instrument comfortably in hand or fix on tripod and point the microphone at the suspected noise source, the sound pressure level will be displayed. (3) When MAX/MIN (maximum/minimum hold) mode is chosen. The instrument captures and holds the maximum or minimum noise level for a long period using any of the time weightings and ranges.
