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1. 8 Model 407780 Version 2 1 09 07 Calibration Calibrating the Model 407780 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 ToT i I Measurement mode INST 2 Insert the 407780 microphone into the opening of the acoustical calibrator 3 Adjust the 407780 calibration potentiometer until the 407780 display matches the acoustical calibrator output signal typically 94 or 114dB 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 Analog output The 407780 has two analog output jacks located on its right side one for AC and one for DC For DC the meter transmits 10mv dB For AC the full scale value is 0 707V The output impedance is 600Q for AC and 1002 for DC The supplied 3 5mm stereo mini plug can be used to assemble a cable to connect to either of the meter s analog output jacks When using a stereo plug like the one supplied short the Tip and the Ring see diagram below Ground negative connects to the Sleeve while the positive signal is taken from the Tip Ring For mono plugs ground connects to the Sleeve while the positive signal is taken from the Tip The meter output can then be transmitted to a he2. MIN Minimum SPL value is held during measurement INST Instantaneous of sound pressure level Data recording Measuring value Memory full 13 14 15 16 17 18 19 20 21 22 23 24 Unit Frequency weighting A C IMPULSE time weighting When the TIME display icon switches on the real time clock is displayed When the TIME icon is off the display shows elapsed time for Leq and SEL measurements Bargraph 100dB range with 50 segments Range over SLOW time weighting FAST time weighting Measurement completion of Leq and SEL Measurement interruption of Leq and SEL Leq and SEL readings Under Range Model 407780 Version 2 1 09 07 Operation This meter can be used in two different manners As an Integrating Sound Level Meter or as a Sound Pressure Meter SPL Integrating Sound Level Meter LEQ Mode In the LEQ mode the display indicates the integrated average level for the run period If no run time has been accumulated the display shows dashes Taking Measurements 1 Turn the meter on by pressing the green on off button 2 Select the LEQ mode by pressing the Leq SEL SPL button until LEQ appears on the LCD 3 Select the desired Frequency Weighting as needed A or C Change the Frequency Weighting by pressing the A C button The A or C icon will display on the right hand area of the LCD 4 Select the desired Response Time as needed Fast or S
3. Note When the meter is measuring the following buttons cannot be used FAST SLOW IMPULSE INTEG TIME A C Weighting RECORD ERASE DATE TIME UP DOWN Arrow keys 7 Model 407780 Version 2 1 09 07 Setting the Real Time Calendar Clock Ae Start with the meter off Press and hold the DATE TIME button and while holding the key press the green ON OFF button to switch the instrument on Release the power button when the meter flashes three times A blinking number indicates the currently selected parameter The first blinking parameter will represent the current year Use the UP and DOWN arrow keys to set the correct year Press the DATE TIME button to move to the next parameter month Use the arrow keys to set the correct month Repeat step 3 to set the day hour minute and second To confirm the new date and time press the DATE TIME button Note that the 407780 has a back up battery Note The clock can also be set via the accompanying software program See the software manual on the enclosed CD for the steps on this procedure Powering the meter 1 Install the four 4 AA 1 5V batteries in the rear battery compartment Observe polarity If the battery level falls low the battery symbol will appear on the LCD Replace the batteries when the symbol appears For use of the optional AC Adaptor plug the adaptor into the side of the meter in the jack labeled 6V and then into an appropriate AC power source
4. 0 segments 16 times per second OVER and UNDER range status indicators DC 10mV per dB AC 2Vrms full scale Four 4 1 5V AA batteries optional AC adaptor 20 hours approx 41 to 104 F 5 to 40 C 90 Relative Humidity 14 to 140 F 10 to 60 C 75 Relative Humidity 10 4 x 2 8 x 0 8 265 x 72 x 21mm Approx 10 9 oz 310g Batteries four AA 1 5V cells Operation Manual CD with Windows Software and software manual RS 232 Interface cable Windscreen 3 5mm plug for analog output access 12 Model 407780 Version 2 1 09 07 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies to sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website www extech com for contact information A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specific
5. User s Guide EXTECH INSTRUMENTS Integrating Sound Level Datalogger Model 407780 EXTRGH Sar evel MEE 3D 7 7 Pom SPL bi 53 dB INST RANGE 30 13048 Datalogger Ee RECORD ERASE Introduction Congratulations on your purchase of the Extech 407780 Integrating Sound Level Meter The 407780 with programmable integrating time provides precise linearity over a wide range 100dB and displays Leq SEL SPL MAX L and MIN L measurements Response time FAST SLOW and IMPULSE and frequency weighting A and C are programmable The analog output AC and DC can be used with headphones chart recorders or other devices to store data The 407780 with PC Interface and real time calendar clock datalogs stores up to 32 000 readings for later transfer to PC Careful use of this meter will provide years of reliable service Meter Description gst 2 Model 407780 Version 2 1 09 07 Refer to the diagram on the facing page COS OE OV eR COT SIN a 10 11 12 13 14 15 16 17 18 19 1 2 inch microphone shown with windscreen LCD display Power Switch Leq SEL SPL select switch RUN Pause switch Use the UP DOWN arrow keys to change the measurement preset time A C Frequency weighting select switch FAST SLOW IMPULSE time weighting select switch FAST 125ms SLOW 1 second IMPULSE 35ms with slow d
6. adset chart recorder datalogger or other data storage device Sleeve Tip Sleeve Tip Stereo 4 yt Mono M B Ring 9 Model 407780 Version 2 1 09 07 Datalogging For detailed information on using the software please refer the software manual on the enclosed CD The 407780 can store up to 32 000 measurements To view save print and manipulate the data the records must be downloaded to a PC Each recorded data set holds the following information amp 96 Completed Date and Time of reading Response time and frequency Open Print Lr weighting Sampling time rate of data recording Date Time 11 17704 16 19 00 Total number of records Sampling Time 5 Leq Record Num 96 lt MaxL Leq Yalue 92 2 SEL Value 119 0 Min L MAX Value 109 4 sii MIN Yalue 40 0 SEL Freq Weighting A Time Weighting Slow Measurement duration 52 0 16 19 00 67 7 16 19 05 67 7 16 19 10 57 9 16 19 15 59 1 16 19 20 58 8 16 19 25 56 0 16 19 30 59 5 16 19 35 65 1 16 19 40 49 0 16 19 45 amp Ln 10 Model 407780 Version 2 1 09 07 Start Recording 1 2 3 Connect the sound level meter to a PC via the supplied RS 232 cable Use the supplied Windows software to activate communication Set the sampling rate and the measurement time in the supplied software The meter can now record remotely disconnected from the PC at the rate selected Press the RECORD ERASE key to put the meter in Record Standby The RECORD display
7. ally disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy ry Support line 781 890 7440 Technical support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User s Guide Software updates and other up to the minute product information visit our website www extech com Extech Instruments Corporation 285 Bear Hill Rd Waltham MA 02451 Copyright 2005 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 13 Model 407780 Version 2 1 09 07
8. ecay Press to select MAX MIN recording Press again to step through MAX and MIN values Press and hold for 3 seconds to erase the MAX and MIN values and exit this mode RECORD ERASE Record standby The RECORD symbol appears in standby mode Recording The RECORD symbol flashes once per second while recording Erase data Press amp hold the RECORD ERASE key for 3 seconds to erase data the entire LCD will flash three times Real time clock with calendar Measuring time selection for Leq and SEL RS 232 interface connector Located on bottom not shown AC output terminal located on side not shown 2 Vrms at 130dB Output impedance 6000 Max Output signal uses standard 3 5mm phono jack supplied Signal on tip ground on sleeve DC output terminal located on side not shown Output 10mV dB Output impedance 1000 max Output signal uses standard 3 5mm phono jack supplied Signal on tip and ground on sleeve CAL calibration potentiometer located on side not shown External DC 6V power supply terminal located on side not shown Tripod mounting screw located on rear not shown Battery cover located on rear not shown 3 Model 407780 Version 2 1 09 07 Display Description OF Pe Ge Ns D 10 11 12 Level range Date information Leq Equivalent continuous SEL Sound exposure level SPL Instantaneous sound pressure level Low Battery indicator MAX Maximum SPL value is held during measurement
9. icon will appear on the display Press the RUN PAUSE key to start data recording The RECORD icon will flash once per second One reading will be stored for each sampling interval set in the sampling rate parameter above When the measurement time expires the meter stops recording and the RECORD display icon switches off The recorded data can then be down loaded to the PC using the supplied Windows software Erasing Records 1 2 When the meter s memory is full the FULL display icon will appear on the display Press and hold the RECORD ERASE key for 3 seconds to erase all records The FULL display icon will switch off when the data is cleared 11 Model 407780 Version 2 1 09 07 Specifications General Specifications Applicable Standards Measurement types Measurement range Frequency Range Frequency weighting Response time Linearity range Display resolution Accuracy Microphone Numeric Display Display update rate Bargraph Display Bargraph update rate Display warnings Analog outputs Power supply Battery life Operating conditions Storage conditions Dimensions Weight Supplied Material Adjustment screwdriver IEC 651 804 type 2 and ANSI S1 4 type 2 SPL SEL Leq MAX L and MIN L 30 to 130dB 31 5Hz to 8kHz A and C FAST SLOW and IMPULSE selections 100dB 0 1dB 1 5db 94dB 1kHz 0 5 Electret Condensor 4 digit LCD Twice per second 4dB per step over 100dB range with 5
10. low Change the Response Time by pressing the FAST SLOW IMPULSE button The FAST SLOW icon will display on the upper area of the LCD 5 Select the desired Run Time There are 13 preset time settings available To perform a manual recording select the 24 hour interval 1 second 3 seconds 10 seconds 30 seconds 1 minute 5 minutes 8 minutes 10 minutes 30 minutes 15 minutes 30 minutes 1 hour 8 hours 24 hours Change the run time by pressing the INTEG TIME button The run time will appear in the middle of the LCD Press the Aor Y button to select the preset time setting Hold the instrument comfortably in hand and away from your body or position it on a tripod Point the microphone toward the noise source Press gt H button to begin measuring The run time counter will zero gt and begin counting While running the meter will display at the top 0 00 00 of the display leq jy 7 cod Oo tas The meter will stop automatically after the preset time interval has expired and will display m and the LEQ for the recording interval S E 30 fa It is also possible to record each session Simply press RECORD before pressing gt H The RECORD icon will appear on the bottom right of the display and flash while the session is in progress For instructions on retrieving the recorded data please refer to the software manual on the CD included with your meter Leq os a aa To take another LEQ
11. ophone toward the noise source 7 Press gt H button to begin measuring The run time counter will zero and begin counting While running the meter will display at the top 00 00 00 of the display SEL 68 Ja The meter will stop automatically after the preset time interval has m expired and will display m and the SEL for the recording interval 00 00 30 sel G8 Ta It is also possible to datalog the session Simply press RECORD before pressing gt I The RECORD icon will appear on the bottom right of the display and flash while the session is in progress For instructions on retrieving the recorded data please refer to the software manual on the CD included with your meter 6 Model 407780 Version 2 1 09 07 Sound Pressure Measurements SPL In SPL mode the display shows readings of the sound pressure level 1 Turn the meter on by pressing the green on off button 2 Select the SPL mode by pressing the Leq SEL SPL button until SPL appears on the LCD 3 Select the desired Frequency Weighting as needed A or C Change the Frequency Weighting by pressing the A C button The A or C icon will display on the right hand area of the LCD Note With A weighting selected the meter responds like the human ear A weighting is commonly used for environmental measurements OSHA regulatory testing law enforcement and workplace design Select C weighting for flat response measurements C weighting is typically
12. simply press gt ll again 5 Model 407780 Version 2 1 09 07 SEL Mode In the SEL mode Sound Exposure Level the display indicates the constant sound level in decibels which if lasting for one second would deliver the same amount of acoustical energy as that delivered over the entire measurement period If no run time has been accumulated the display shows dashes 1 Turn the meter on by pressing the green on off button 2 Select the SEL mode by pressing the Leq SEL SPL button until SEL appears on the LCD 3 Select the desired Frequency Weighting as needed A or C Change the Frequency Weighting by pressing the A C button The A or C icon will display on the right hand area of the LCD 4 Select the desired Response Time as needed Fast or Slow Change the Response Time by pressing the FAST SLOW IMPULSE button The FAST SLOW or IMP icon will display 5 Select the desired Run Time There are 13 preset time settings available To perform a manual recording select the 24 hour interval 1 second 3 seconds 10 seconds 30 seconds 1 minute 5 minutes 8 minutes 10 minutes 30 minutes 15 minutes 30 minutes 1 hour 8 hours 24 hours Change the run time by pressing the INTEG TIME button The run time will appear in the middle of the LCD Press the AorY button to select the preset time setting 6 Hold the instrument comfortably in hand and away from your body or position it on a tripod Point the micr
13. used for the sound level analysis of machines engines etc Most hearing conservation related testing is performed using A Weighting 4 Select the desired Response Time as needed Fast Slow or Impulse Change the Response Time by pressing the FAST SLOW IMPULSE button The FAST SLOW or IMP icon will display Note Select FAST to capture noise peaks and noises that occur very quickly In FAST mode the meter responds in 125ms Select the SLOW Mode meter responds in 1s to monitor a sound source that has a reasonably consistent noise level or to average quickly changing levels In IMPULSE mode the meter responds in 35ms and is used to capture sounds such as those produced at a shooting range Selection of Fast or Slow is determined by the application and any directives or standards related to that application Most hearing conservation related testing is performed using a SLOW Response Time setting 5 Hold the instrument comfortably in hand and away from your 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 MIN MAX Function Press the MAX MIN INST button to begin capturing the Maximum MAX OR Minimum MIN sound values The display will indicate the MAX or MIN value depending on which is selected captured since the MAX MIN button was pressed Press and hold the MAX MIN INST button to return to the instantaneous reading mode
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