Sound Level Meter User Manual
Contents
1. Sound Level Meter User Manual Ww pave Meter sours 1c a rT el z e Teri we l a S C E BT a i Sound Level Meter User Manual Contents 1 Seay HEPAT se 2 Gerieral Description viccicccccccsssisesressessesseesessassasseseseeesenesesess andnsasncoanaaevercerars S Specifications cccccccscccsvscsecescscsceacenavesees EE Eee 4 Name and Functions NSFC Pa de ett EEE Peep ind a eR ne PENT 5 Measurement Preparation cccccccnceccecsecescrsseseeseeemestsceeessneenesnesseedectecsenssrssenenes 6 Operating Precautions cccsccecsseccsecescceeecseeeerssereesseensenersees A PAEAN AS ca d Measurement ueunnnenennnnnnununnnnnnnnnnnn une TEE Eu 8 Calibration Procedures cccsceeeeeeeeeeeees Sound Level Meter User Manual 1 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 Altitude up to 2000 meters Relatively humidity 90 max Operation Ambient 0 40 C Maintenance amp Clearing Repairs or servicing not covered in this manual should only be performed by qualified personnel Periodically wipe the case with a dry cloth Do not use abrasives or solvents on this instruments Safety symbols O Meter is protected throughout by double insulation or reinforced insulation When servicin2. Turn the meter backlight ON OFF 5 A Weighting C Weighting Select Button A A Weighting For general sound level measurements C C Weighting For checking the low frequency content of noise If the C Weighted level is much higher than the A Weighted level then there s a large amount of low frequency noise 6 Time Weighting Select Button F fast response for normal measurements fast varying noise 5 slow response for checking average level of fluctuating noise 7 Level Range Select Button Lo 30 100dB Hi 60 130dB When OVER is indicated the ranges switch to another range for measurement th L 1 Sound Level Meter User Manual 8 MAX HOLD Button 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 Data Hold button Press and hold the Button for over 2 second to turn on or off data hold function The hold function freezes the reading in the display 9 Microphone v2 inch Electret Condenser microphone 10 Battery Cover 5 Measurement Preparation Battery loading Remove the battery cover on the back and put in one 9V Battery Battery Replacement When the battery voltage drops below the operating voltage mark BAT appears If it appears battery should be replaced with new one 6 Operating Precautions Wind blowing across the mic
3. d using any of the time weightings and ranges When HOLD data hold mode is chosen The hold function freezes the reading in the display Press the HOLD button momentarily to activate or to exit the HOLD function Turn OFF the instrument and remove and remove battery when not in use 8 Calibration Procedures Using a standard Acoustic Calibrator 94dB 1kHz Sine wave Make the following buttons and function switch settings Display dB A Hi or Lo F Function A Weighting Response Time FAST Level range 30 100dB Lo or 60 130dB Hi Measurement mode MAX Hold and Data Hold Mode function disable Insert the microphone housing carefully into the insertion hole of the calibrator Open battery cover and remove the battery to adjust the CAL94dB potentiometer of the unit The level display will indicate the desired level Our products are all well calibrated beforeshipment Recommended Recalibration cycle 1 year Acoustic Calibrator th L 1 rer Sr Sound Level Meter User Manual 1 Rev 101208 CCOR
4. g use only specified replacement parts CE Comply with EMC 2 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 unit conforms to the IEC61672 1 type 2 ANSI 51 4 type 2 for Sound Level Meters 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 30dB to 130dB at frequencies between 31 5Hz and 8kHz Display with 0 1dB steps on a 4 digits LCD With two equivalent weighted sound pressure levels A and C Sound Level Meter User Manual 3 Specifications Calibration 1 5dB under reference conditions OVER is show when input is out of range Hold readings the Maximum Value with decay lt 1dB 3minutes Auto power off Meter automatically shuts down after approx 15 minutes of activi Powersupply One 9V battery 006P or IEC 6F22 or NEDA 1604 1 amp ur m Sound Level Meter User Manual 4 Name and Functions 1 Windscreen If you operate at wind speed over 10m sec please put protective accessories in front of the microphone 2 LCD Display _ C Weighting Low Range 30 to 100dB High Range 60 to 130dB 3 Power ON OFF Button Turn the meter power ON OFF 4 Backlight Button
5. rophone would bring additional extraneous noise Once using the instrument in the presence of wind it is a must to mount the windscreen to not pick up undesirable signals To achieve more accurate measurement use an extension cable to separate the Microphone from the main body so that the effect of unexpected sound reflection can be eliminated Calibrate the instrument before operation if the instrument was not in use for a long time or operated at bad environment Do not store or operate the instrument at high temperature and high humidity environment Keep microphone dry and avoid severe vibration Please take the battery and keep the instrument in low humidity environment When not in use Sound Level Meter User Manual 7 Measurement Open battery cover and install a 9 volt battery in the battery compartment Turn on power and select the desired response Time and weighting If the sound source consists of short bursts or only catching sound peak set response to FAST To measure average sound use the slow setting Select A weighting for general noise sound level and C weighting for measuring sound level of acoustic material Select desired Level 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 When MAX maximum hold mode is chosen The instrument captures and holds the maximum noise level for a long perio
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