Integrating Sound Level Meter and Datalogger
Contents
1. Manually set time ao Press and hold INTEG TIME for 3 seconds to manually set the integration time A flashing cursor indicates the currently selected parameter seconds Use the Y A buttons to set desired second Press the INTEG TIME button to move to the next parameter minutes repeat this procedure until the desired minutes and hours have been set Press the INTEG TIME button to store the setting and to exit this mode The maximum measurement time setting is 100 hours 8 407780A EU EN v1 3 4 14 6 Press the Il button to start the measurement the gt symbol and the elapsed measurement time is displayed e When the measurement time has elapsed the measurement automatically terminates and the W symbol is displayed e During measurements the Il button can be used to pause and resume a test e During pause the pause symbol Il is displayed e To terminate the measurement press and hold the Il button for 2 seconds e If an under or over range condition occurs at least once during measurement the OVER or UNDER indicator appears to indicate that the recorded data contains over range or under range data e During this procedure most of the buttons such as the A C button and level range buttons are inoperative Only the Il button and the Leq SEL SPL buttons can be used All other settings must be made before starting the measurement e Pause intervals are not included in the measurement time 7 When the measur2. 50 0 110 0 C 50 0 109 2 8000 A 50 0 108 9 C 50 0 107 0 16 407780A EU EN v1 3 4 14 RANGE 60 120 GB Test starting point 94 dB for all weightings and frequencies except 31 5Hz A weighted for which the starting point is 74 dB FREQUENCY L O R L O R Hz WEIGHTING dB WEIGHTING dB 31 5 A 60 0 80 6 C 60 0 117 0 1000 A 60 0 120 0 C 60 0 120 0 4000 A 60 0 120 0 C 60 0 119 2 8000 A 60 0 118 9 C 60 0 117 0 RANGE 70 130 dB Test starting point 104 dB for all weightings and frequencies except 31 5Hz A weighted for which the starting point is 84 dB FREQUENCY L O R L O R Hz WEIGHTING dB WEIGHTING dB 31 5 A 70 0 90 6 C 70 0 127 0 1000 A 70 0 130 0 C 70 0 130 0 4000 A 70 0 130 0 C 70 0 129 2 8000 A 70 0 128 9 C 70 0 127 0 Frequency range Overall characteristics including microphone 31 5 to 8000Hz Frequency weighting A meets the requirement of IEC 61672 1 for class 2 A weighting C meets the requirement of IEC 61672 1 for class 2 C weighting Time weighting RMS detection Fast according to IEC 61672 1 class 2 Slow according to IEC 61672 1 class 2 Impulse according to IEC 61672 1 class 2 Reference conditions Type of the acoustic field Free Reference sound pressure level 94 0dB related to 20uPa Reference level range 60 to 120dB Reference frequency
3. 7dB 26 1dB C 21 8dB 29 5dB Linearity operating range Total linear operating range Level range selection 130dB A weighted 1000Hz 60dB dynamic range 60 to 120dB 70 to 130dB Linear Operating Ranges L O R In accordance with IEC 61672 1 A weighted 1000Hz 30dB to 5 ranges in 10dB steps 30 to 90dB 40 to 100dB 50 to 110dB RANGE 30 90 GB Test starting point 64 dB for all weightings and frequencies except 31 5Hz A weighted for which the starting point is 44 dB FREQUENCY L O R L O R Hz WEIGHTING dB WEIGHTING dB 31 5 A 36 1 50 6 C 39 5 87 0 1000 A 36 1 90 0 C 39 5 90 0 4000 A 36 1 90 0 C 39 5 89 2 8000 A 36 1 88 9 C 39 5 87 0 RANGE 40 100 dB Test starting point 74 dB for all weightings and frequencies except 31 5Hz A weighted for which the starting point is 54 dB FREQUENCY L O R L O R Hz WEIGHTING dB WEIGHTING dB 31 5 A 40 0 60 6 C 40 0 97 0 1000 A 40 0 100 0 C 40 0 100 0 4000 A 40 0 100 0 C 40 0 99 2 8000 A 40 0 98 9 C 40 0 97 0 RANGE 50 110 dB Test starting point 84 dB for all weightings and frequencies except 31 5Hz A weighted for which the starting point is 64 dB FREQUENCY L O R L O R Hz WEIGHTING dB WEIGHTING dB 31 5 A 50 0 70 6 C 50 0 107 0 1000 A 50 0 110 0 C 50 0 110 0 4000 A
4. next parameter minutes and use the A Y buttons to set the current minute Repeat step 4 to set the current hour day month and year Press DATE TIME to store the new date and time and to exit this mode Recording Data In the Integrating Sound Level Meter mode the meter can record and store measurement data Memory capacity is 32000 records which can be stored in up to 255 blocks Recording can start when integration begins or at a preset time The stored data cannot be viewed on the meter s display it must be downloaded using the supplied PC software 1 Setting the data sampling rate a Press the button to switch OFF the meter b Press and hold the INTEG TIME button and then switch the meter ON the Intr symbol and the sample rate in seconds will be displayed c Use the A W buttons to set the sampling rate 1 to 255 seconds d Press INTEG TIME to store the setting and exit this mode Set the integrating functions as described previously Press the RECORD ERASE button to prepare for recording The REC symbol will appear on the display Press the button The measurements will start and the REC symbol will begin to flash indicating that data are being stored If integration is paused recording will also pause When the memory is filled 32000 data points or 255 blocks used the REC FULL symbol will be displayed 10 407780A EU EN v1 3 4 14 7 To set the recording function to start at a preset time a Pr
5. power input USB input located on bottom not shown Tripod mounting screw located on rear not shown Battery cover located on rear not shown 4 407780A EU EN v1 3 4 14 Display Description OO Ae OY las oR 10 11 12 N gt IRA TER gt WM eer K ity Wy My 14 O O SPL V CN Woe B OE Ma wk GED D FUL KE aie CS ee Sound level range indicator 5 ranges 30 90dB 40 100dB 50 110dB 60 120dB and 70 130dB Bar graph represents the current sound level 1dB resolution Date time and elapsed time indicator year month day or hour minute second During integrating this indicator displays the elapsed time in seconds When viewing the Peak Hold value this indicator displays PH When viewing the percentile values this indicator displays L 05 L 10 L 50 L 90 or L 95 Leq Equivalent continuous sound level reading SEL Sound exposure level reading SPL Time weighted sound level reading Sound Pressure Level Low battery indication MAX When displayed flashing it indicates that the Maximum time weighted sound level reading is shown When it is displayed solid it indicates that the Maximum sound level reading is displayed MIN Minimum sound level reading REC Indicates that Data recording is in process Sound level reading 0 1dB resolution 30 0 130 0dB FULL Indic
6. thread Alarm output If the measured dB level exceeds the set limit the over limit signal will appear at the alarm output connector 5Vdc output The output signal will remain active as long as the sound level exceeds the set limit Setting the sound level alarm high limit 1 Switch the meter OFF 2 Press and hold the LEQ SEL SPL button while switching the meter ON 3 Release the LEQ SEL SPL button the ALARM symbol along with the currently set limit is displayed 4 Usethe A YW buttons to set the desired sound level high limit value Press LEQ SEL SPL button to store the setting and to exit this mode Software Installation and Operation For installation and operating instructions please refer to the contents of the supplied CD ROM 12 407780A EU EN v1 3 4 14 Calibration Calibrating the Integrating Sound Level Datalogger requires an acoustical calibrator such as the Extech Model 407766 or 407744 1 Configure the meter as follows Display SPL dBA Time weighting mode FAST 2 Insert the microphone into the opening of the acoustical calibrator 3 Switch the calibrator ON 4 Adjust the meter s calibration potentiometer as shown in the accompanying diagram until the meter s display matches the acoustical calibrator output signal typically 94 or 114dB 5 Switch the calibrator OFF 6 Remove the calibrator from the microphone very slowly to avoid damaging the microphone 7 In cases where adjusting t
7. x36 H mm 10 4 x 2 8 x 1 4 Weight Approx 380g including battery 13 4 oz Copyright 2014 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form 1SO 9001 Certified www extech com 19 407780A EU EN v1 3 4 14
8. 1000Hz Reference temperature 23 C 73 4 F Reference relative humidity 50 RH Reference static pressure 101 325 kPa Reference incidence direction Perpendicular to the front of the microphone diaphragm 17 407780A EU EN v1 3 4 14 Calibration Acoustical calibrator Extech 407744 or equivalent Calibration check frequency is 1000Hz Nominal calibration level for the free field 94 1dB Nominal calibration level for the diffuse field 94 0dB Frequency for acoustic testing 8000Hz Warm up time lt 2min Sampling interval Bar graph indication gt 125 ms approx Numeric indication 1 sec approx Data record capacity Data can be stored in memory Max 32000 readings can be stored Max 255 blocks LCD Display Display screens 4 digit numerical indication of sound level from 30 0 to 130 0dB with 0 1dB resolution Bar graph indication of current sound level with 1dB resolution Sound level range indicator 30 90dB 40 100dB 50 110dB 60 120dB or 70 130dB in five ranges Time display year month day and hour minute second Display update rate 1 second Display s start up indication Depends on the condition of meter when it was last switched off Warning indications Out of range indications OVER displayed at upper limit of the range UNDER displayed at lower limit of the range Outputs AC output using selected frequency weighting Output voltage 2Vrms at full scale of the range Output impedance 5kQ
9. EXTECH ancu INSTRUMENTS Integrating Sound Level Meter and Datalogger Model 407780A 0 Introduction Thank you for selecting the Extech Instruments Model 407780A This device is shipped fully tested and calibrated and with proper use will provide years of reliable service Please visit our website www extech com to check for the latest version of this User Guide Product Updates and Customer Support Features The Sound Level Meter complies with the requirements of IEC 61672 1 2003 standard for a Class 2 instrument The instrument contains several features which permit sound level measurements under a variety of conditions Features include Five measurement ranges Fast Slow and Impulse time weighting settings A and C frequency weighting settings Storage of up to 32000 measurement records USB serial port for downloading records to a computer or real time analysis AC DC signal outputs are available from a single standard 3 5mm coaxial socket suitable for use with a frequency analyzer level recorder FFT analyzer graphic recorder etc Leq SEL SPL MAX SPL MIN PH Peak Hold LOS L10 L50 L90 and L95 ten measured parameters are monitored during measurement Preset measurement time Sound level alarm output connector 2 407780A EU EN v1 3 4 14 Instrument Care e Do not attempt to remove the mesh cover from the microphone as this will cause damage and affe
10. HA requires Slow and A weight for many of their workplace tests Use the A W buttons to select the desired dB range Choose a setting in which the bar graph indication registers approximately in the middle of the range If the OVER indicator appears during a measurement the upper limit of the selected range has been exceeded Increase the range setting until the symbol remains off during measurements Similarly if the UNDER indicator appears reduce the range setting until the symbol remains off Both indicators are non latching and will clear when the correct range is selected Hold the instrument comfortably in hand away from the body or position it on a tripod Point the microphone toward the noise source the sound pressure level will be displayed on the meter s LCD display The numeric level indication on the display shows the currently measured sound level The reading is updated once per second Press the MAX button to display the maximum sound level encountered during a measurement period the MAX indicator will blink appear on the display Press the MAX button again to exit this mode Press DATE TIME to change from current time hour minute second display to current date year month day display The display will revert to the current time display after 2 seconds 7 407780A EU EN v1 3 4 14 Integrating Sound Level Meter measurements The integrating sound level mode will measure the sound level over time and calculate the foll
11. Load impedance 2 gt 1MQ DC output Output voltage 10mV dB Output impedance 5kQ Load impedance 2 gt 1MQ I O connector Sound level meter control from and data output to PC USB Alarm output 5Vdc typical 18 407780A EU EN v1 3 4 14 Power requirements 4 x 1 5V IEC R6P size AA manganese super heavy duty batteries or equivalent Battery life Approx 24 hours External power source DC voltage from 5V to 6V Current rating Approx 20mA 6V Ambient conditions Operating conditions 10 C to 50 C 14 to 122 F 30 to 90 RH non condensing Storage conditions 10 C to 60 C 14 to 140 F lt 70 RH non condensing Effect of temperature lt 0 5dB from 10 to 50 C 14 to 122 F Effect of humidity lt 0 5dB for 30 RH to 90 RH at 40 C 104 F 1000Hz Effect of vibration A 40 Hz 1m s vibration produces no noticeable effect Effect of magnetic field No noticeable effect Standards Compliance indicates compliance with applicable European Union Directives EMC Emission IEC 61000 6 3 Generic emission standard for residential commercial and light industrial environments No significant emissions from the instrument IEC 61672 1 Instrumentation standard classification group X and performance class 2 sound level meter EMC Immunity IEC 61000 6 2 Generic standard Immunity for industrial environments No degradation in performance when subjected to 10V m un modulated Dimensions Approx 265 L x72 W
12. ates that the recording memory bank has been filled 5 407780A EU EN v1 3 4 14 13 14 15 16 17 18 19 20 21 22 dB Sound level unit decibel A C Aor C frequency weighting indicator IMP Impulse time weighting indicator OVER Over range indicator appears flashing when over range measurements have been included in the sound level measurement data recording session SLOW Slow time weighting indicator FAST Fast time weighting indicator E Indicates that integrating sound level measurements have been stopped H Indicates that integrating sound level measurements are paused gt Start and continuous integrating measurement indicator UNDER Under range indicator appears flashing when under range measurements have been included in the sound level measurement data recording session 6 407780A EU EN v1 3 4 14 Operation The meter has two modes of operation Sound Level Meter mode and Integrating Sound Level Meter mode Sound Level Meter measurements 1 2 3 Press the button to switch the meter ON The initial state depends on the conditions set when the meter was last switched off Press the A C button to select the desired frequency weighting Press the FAST SLOW IMPULSE button to select the desired response time Note Refer to local standards to select the proper weighting and response time for the measurements to be performed Requirements vary according to country and type of test OS
13. ct the accuracy of the instrument e Protect the instrument from impact Do not drop it or subject it to rough handling Transport it in the supplied carrying case Protect the instrument from water dust extreme temperatures high humidity and direct sunlight during storage and use e Protect the instrument from air with high salt or sulphur content gases and stored chemicals as this may damage the delicate microphone and sensitive electronics e Always switch the instrument off after use Remove the batteries from the instrument if it is not to be used for a long period of time Do not leave exhausted batteries in the instrument as they may leak and cause damage e Clean the instrument only by wiping it with a soft dry cloth or when necessary with a cloth lightly moistened with water Do not use solvents abrasives alcohol or cleaning agents 3 407780A EU EN v1 3 4 14 Meter Description 00 U ae I S 10 11 12 13 14 15 16 1 2 inch microphone LCD display Power button Leq SEL SPL select button RUN Pause button 1 UP DOWN range setting buttons A C Frequency weighting select switch FAST SLOW IMPULSE time weighting select switch FAST 125ms SLOW 1 second IMPULSE 35ms with slow decay MAX button RECORD ERASE button Real time clock button Integration time button Alarm output AC DC output CAL calibration adjustment External
14. ement is completed paused or in progress press the Leq SEL SPL button to cycle through and display the following measurement results Leq Equivalent continuous sound level with start measurement time SEL Sound exposure level with terminate measurement time SPL MAX Maximum sound level with time SPL MIN Minimum sound level with time PH Peak Hold sound level L 05 gt 5 percentile sound level L 10 gt 10 percentile sound level L 50 gt 50 percentile sound level L 90 gt 90 percentile sound level L 95 595 percentile sound level SPL INST gt Current sound level with current time If OVER is flashing the recorded data contains over range measurements If UNDER is flashing the recorded data contains under range measurements 8 Press and hold the Il button for 2 seconds to exit this measurement mode clear the measured result and to return to the normal sound level measurement mode 9 407780A EU EN v1 3 4 14 Setting the Current Time and Date Date and time information is stored with each stored record block Therefore it is important to ensure that this information is correct 1 2 Press to switch OFF the meter Press and hold the DATE TIME button and then press the button to switch ON the meter to enter the date and time setting mode A flashing cursor indicates the currently selected parameter seconds use the A W buttons to set the current second Press the DATE TIME button to move to the
15. ess and hold the DATE TIME button for 2 seconds to enter the PRESET recording start time setting mode the PrE symbol will be displayed b A flashing cursor indicates the currently selected parameter seconds use the A Y buttons to set the current second c Press the DATE TIME button to move to the next parameter minutes and use the A YW buttons to set the current minute d Repeat step c to set the current hour day month and year e Press DATE TIME to store the start time and to exit this mode f The gt and symbols will flash until the start time has been reached The and symbols will then stop flashing and the REC symbol will begin flashing indicating that the measurements are being taken and that recording has started Clearing stored data 1 Press the button to switch OFF the meter 2 Press and hold the RECORD ERASE button and then press the button to switch ON the meter 3 The CLr symbol will appear on the display indicating that the data have been erased Analog outputs The analog outputs provide analog signals proportional to the measured values for recorders and other devices The outputs require a 3 5mm stereo mini plug AC Output An AC signal corresponding to the frequency weighted signal is available at this connector Output voltage 2Vrms 100mVrms scale upper limit Output impedance approx 5kO Load impedance 2 1MQ The output voltage when the instrument is in calibration mode 6dB from scale up
16. f batteries in a fire Batteries may explode or leak o Never mix battery types Always install new batteries of the same type 14 407780A EU EN v1 3 4 14 Specifications Applicable standards 1EC61672 1 2003 Class 2 IEC60651 1979 Type 2 ANSI 1 4 1983 Type 2 IEC60804 1985 Type 2 Parameters A A frequency weighting sound pressure level C C frequency weighting sound pressure level FAST Fast time weighting SLOW Slow time weighting IMP Impulse time weighting SPL Current time weighted sound pressure level Leq Equivalent continuous sound level A or C SEL Sound exposure level A or C SPL MAX Maximum sound pressure level A or C SPL MIN Minimum sound pressure level A or C PH Peak Hold sound pressure level A or C L 05 5 percentile sound level A or C L 10 10 percentile sound level A or C L 50 50 percentile sound level A or C L 90 90 percentile sound level A or C L 95 95 percentile sound level A or C SPL MAX Maximum time weighted sound pressure level MAX symbol blink Measurement range 30 to 130dB Peak Hold ranges 30 90 range 63 93dB Peak Hold 40 100 range 73 103dB Peak Hold 50 110 range 83 113dB Peak Hold 60 120 range 93 123dB Peak Hold 70 130 range 103 133dB Peak Hold 15 407780A EU EN v1 3 4 14 Self generated noise level Typical values at 23 C 73 4 F using the nominal microphone equivalent capacitance of 27pF 30 90dB range Weighting Electrical Total A 22
17. he potentiometer does not affect the displayed reading or where the adjustment cannot produce the appropriate displayed reading please return the unit for service 13 TT i il 407780A EU EN v1 3 4 14 Maintenance amp Cleaning e Service not covered in this manual should be performed by qualified personnel e Periodically wipe the case with a dry cloth Do not use abrasives or solvents Battery Installation When the low battery icon i appears on the display there is insufficient power to make accurate measurements and the batteries must be replaced Press the button to switch off the instrument 2 Loosen the screw in the battery cover and remove the cover from the battery compartment Retain the screw and cover 3 Observing correct polarity insert four AA batteries Replace and secure the battery cover 5 Press the button to switch ON the instrument Check for correct operation Never dispose of used batteries or rechargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment Other Battery Safety Reminders o Never dispose o
18. owing results 1 2 3 4 Leq SEL Equivalent continuous sound level measurement Sound exposure level measurement SPL MAX Maximum sound level measurement SPL MIN Minimum sound level measurement PH Peak Hold sound level measurement Percentile Sound level LOS L10 L50 L90 and L95 measurement When using this meter in a mode other than the sound level measurement mode all processing functions provided by the meter are performed simultaneously For example when equivalent continuous sound level measurement is selected the exposure level and percentile level are also determined Press the button to switch ON the meter Press the A C button to select the desired frequency weighting Press the FAST SLOW IMPULSE button to select the desired response time Use the A V buttons to select the desired dB range Choose a setting in which the bar graph indication registers near the middle of the range If the OVER or UNDER indicators switch ON frequently change the level range setting Setting the integrating measurement time Default or Manual Default times a b Q Press the INTEG TIME button once to select a default integrating time Use the V A buttons to select the measurement time The selection will cycle through 1sec 3sec 10sec 30sec 1min 5min 8min 10min 15min 30min 1hour 8hours 24hours After 5 seconds of inactivity the meter will store the displayed selection and return to the normal mode
19. per limit 1000Hz sine wave is 0 5Vrms DC Output A level converted DC signal generated by RMS detection and logarithmic compression is available at this connector The signal reflects the frequency and time weighting settings of the instrument Output voltage 10mV 0 1mV dB Output impedance approx 5kO Load impedance gt 1MOQ The output voltage when the instrument is reading 94dB is nominally 0 94V DC Sleeve Tip 11 407780A EU EN v1 3 4 14 External power source Insert the plug of an AC adaptor or external battery pack into the DC 6V DC source from 5V to 6V socket on the side of the instrument When a connector is inserted into this socket the internal batteries will be disconnected and the instrument will be powered from the external source The low battery symbol ed will appear on the display if the external voltage is insufficient for the instrument to provide accurate measurements Note Ensure that the external power source is connected with the polarity as indicated in the following diagram otherwise damage may be caused to the instrument and external power source gt O DC 6V Windscreen When making measurements in strong winds wind noise and strong air movements at the microphone can cause measurement errors Such effect can be reduced by using the windscreen Tripod Mounting For long term measurements the instrument may be mounted on a standard camera tripod using the rear integral x 20 UNC mounting
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