Datalogging Sound Level Meter Model 407764
Contents
1. DC output Power supply Battery life AC adapter Operating temperature Operating humidity Storage temperature Storage humidity Memory size RS 232 Interface Dimensions Weight Accessories IEC651 Type 2 ANSI 1 4 Type 2 1 5dB under reference conditions 31 5Hz 8KHz 30 130dB A and C 0 5 Electret condenser microphone 4 digit LCD Resolution 0 1dB Display period 0 5 sec 50dB scale 1dB steps Display period 50mS Auto ranging 100dB scale 2dB steps 50mS 128 000 records 255 sets non volatile memory 1 to 86 400 seconds per record FAST 125mS SLOW 1 sec Maximum reading held 30 80dB 40 90dB 50 100dB 60 110 dB 70 120dB 80 130dB Total of 6 ranges 30 to 130dB 50dB OVER indicator for readings higher than high limit UNDER indicator for readings lower than low limit 0 707 Vrms at Full Scale Output impedance approx 600Q 10mV dB Output impedance approx 100Q Four 1 5V AA batteries Approx 30 hrs continuous operation Voltage 6VDC Voltage Ripple lt 100mVpp Supply Current gt 100mADC Socket Pin Ground Casing Positive External Diameter 3 5mm 0 to 40 C 32 to 104 F 10 to 80 RH 10 to 60 C 14 to 140 F 10 to 80 RH 128 000 data records with Date and Time Stamping Baud rate 9600bps 265 x 72 x 35mm 10 4 x 2 8 x 1 4 Approx 358g 11 5 oz including battery Batteries carrying case screwdriver windscreen 3 5mm plug RS 232 cable Windows2. In FAST mode the meter responds in 200ms Select the SLOW Mode meter responds in 500ms to monitor a sound source that has a reasonably consistent noise level or to average quickly changing levels Selection of Fast or Slow is determined by the application and any directives or standards related to that application Auto Manual Range Press the LEVEL button up arrow to scroll through the following ranges 30 80dB 40 90 50 100dB 60 110 70 120 80 130 and 30 130dB auto The display will reflect the range for each button press Notes Use Auto Range when the noise source is relatively steady Use one of the Manual ranges may be required if the dB levels are changing over a wide range 4 407764 EU EN V2 2 5 11 Operation 1 Power the meter and select the desired Response Time Fast or Slow and Frequency Weighting A or C 2 Select the desired range 3 Hold the instrument comfortably in hand or position on tripod Point the microphone toward the noise source the sound pressure level will be displayed on the meter s LCD display 4 When MAX maximum hold mode is selected by pressing the MAX key the instrument captures and holds the maximum noise level reading on the display Press the MAX key again to clear the MAX reading Calibration Note that a Sound Level Calibrator is required Set up the meter as listed in Step 1 below To calibrate the meter 1 Display SPL dBA Response Time FAST Disable the MAX function Ran
3. Memory full ie wti in wi Milling 16 19 19 03 Units lony Frequency weighting A C 2 A T TIME function 4 S 50dB level Bargraph S bY KY X Over range spL YW HH daB e SLOW time response l FAST time response Under range 3 407764 EU EN V2 2 5 11 Measurement Preparation e Read the following safety information before attempting to operate the meter e Use the meter only as specified or the meter s built in protection may be impaired 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 Replacement When the battery voltage drops to a critical level the EX symbol appears on the LCD Replace batteries as soon as possible after the battery symbol appears The batteries 4 AA are located in the rear battery compartment Remove the single Philips head screw center rear for access to the batteries You as the end user are legally bound EU Battery ordinance to return all used batteries disposal in the household garbage is prohibited You can hand over your used batteries accumulators at collection points in your community or wherever batteries accumulators are sold Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle Measurements Default Configuration 1 The meter s default configuration is as fo
4. User s Manual EXT INSTRUMENTS A FLIR COMPANY Datalogging Sound Level Meter Model 407764 Introduction Congratulations on your purchase of Extech s Datalogging Sound Level Meter The meter is capable of performing all your noise measurements needs in addition to it s capabilities for data acquisition direct data storage to a PC or datalogging data storage to internal memory for later download Data storage enables the user to save data analyze data and generate reports This professional meter with proper care will provide years of safe reliable service Safety symbols o Meter is protected throughout by double insulation or reinforced insulation CE Complies with EMC 2 407764 EU EN V2 2 5 11 Meter Description ANOaARWBHND 9 10 11 12 13 Battery cover 14 15 Wind screen Microphone Display Power switch K Level range control switch l MAX hold switch Frequency weighting switch Response time select switch AC output terminal ets eee S s see see peers icra senses serene Se SS EEE SE asset DC output terminal CAL calibration pot External DC 6V power fo X AK RS 232 interface connector f Tripod mounting screw gt Display Description CAO Or T O Range selection Date information SPL Instantaneous sound pressure level Low Battery MAX Maximum SPL value is held Data recording Measurement value
5. compatible software Copyright 2011 Extech Instruments Corporation a FLIR company All rights reserved including the right of reproduction in whole or in part in any form www extech com 10 407764 EU EN V2 2 5 11 Appendix Typical A Weighted Sound Levels 50 HP Siren 100 Jet take off 200 Riveting machine Subway 20 Pneumatic drill 50 Vacuum cleaner 10 Large store Small office Residential area night Whisper 5 Threshold of hearing 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 Chain saw Boiler room Freight train 100 Speech 1 Large Office Residence Sound studio 407764 EU EN V2 2 5 11 Software Protocol Data Protocol Baud rate 9600bps Byte1 Byte2 Byte3 Byte4 Byte5 02 Status Function 03 Leading byte Ending byte Status Byte2 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 BitO 0 Fast C Normal Normal Normal 0 0 0 30 80 1 Slow A Max Full Rec 0 0 1 40 90 0 1 0 50 100 0 1 1 60 110 1 0 0 70 120 1 0 1 80 130 1 1 0 30 130 1 1 1 Function Byte3 Bit7 Bit6 Bit5 Bit4 x107 Bit3 0 x10 0 Normal Normal Normal 00 19 1 OVER UNDER BT Function Byte4 Bit7 4 x 10 Bit3 0 x101 0 00 99 1 Command Protocol Set time and date Send 7 bytes D YY MM dd hh mm ss leading byte year month date h
6. ge 70 to 120dB 2 Insert the microphone carefully into the sound level calibrator 3 Power the calibrator and adjust the Sound Level Meter s CAL potentiometer as shown in figure at right to match the Calibrator s output 4 Typically a Sound Level Calibrator will supply 94dB or 114dB at 1KHz Adjust the Sound Level Meter s CAL potentiometer for a 94dB or 114dB LCD display Analog output The 407764 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 100Q 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 chart recorder datalogger or other data storage device Sleeve Tip Sleeve Tip Ring 5 407764 EU EN V2 2 5 11 DataLogging The internal memory of the meter can store up to 128 000 reading in up to 255 recording sessions called sets Prior to beginning data storage the meter s real time clock and the datalogger s sample rate must be set using the supp
7. he number of records data points in the selected set SHOW DATA Display Save or Graph data from selected set 8 407764 EU EN V2 2 5 11 DATA DOWNLOAD PROCEDURE 1 Click the MEMORY icon in the Control Panel screen Click the NUMBERS OF SETS button the number of sets will appear Click on the TIME OF RECORDING button to view each recorded set Click on a SET in the TIME OF RECORDING box The number of records in the set will appear and the data will be downloaded from meter to PC Save to disk if desired 5 Click the SHOW DATA button for details on each record Figure 13 shows the data list Select SAVE PRINT GRAPH or EXIT from the menu choices Note In the example for Figure 12 there are 3 sets of recorded data in memory Set No 3 has 15 records Note If you need to change the ID CODE or the SAMPLING time click on the desired parameter type the changes and click on the bar List of datalogged set Graph of datalogged set Pr oN SAVE PRINT GRAPH EXIT 246 RECORDS IN NO 3 SET Pont Limit gt gt gt gt gt gt gt gt gt gt rr gt gt gt TIME 08 0 0812 03 08 14 05 08 16 9 407764 EU EN V2 2 5 11 Specifications Applicable Standards Accuracy Frequency range Measuring level Frequency weighting Microphone Display Bargraph Sampling rate Memory size Datalogging sample rate Time weighting MAX Level ranges Auto range Linearity range Alarm function AC output
8. ile name Folders OK Entorthe SAMPEING c extech soundm 1 ET TIME in seconds al 1 lt t lt 65 Cancel Sa Cancel amp PROGRA 1 Network amp EXTECH mesta gt SOUNDM 1 I Read only List files of type Drives Data Files dat ic 7 407764 EU EN V2 2 5 11 DISPLAY SELECTIONS GRAPH PRINT GMT DOT 14 0201 1402072 14 0209 1402 04 14 02 05 1402 06 14 0207 14 0200 14 0209 14 0210 wen 14 0212 14 0213 14 02 14 gt gt gt gt gt gt gt gt gt gt hr gt b gt Pe ANALOG Logger Window memory setup data download The Logger window sets the sample rate of the meter s internal memory and provides the controls to download display and save stored data MEMORY Displays memory size REMAINING Displays amount of unused g memory T TIME OF METER When clicked downloads and ae pat nasi displays the meter s date and l time ID CODE Numeric Identification code 12 08 05 Enter the code in the box and click on the bar to store the code NUMBERS OF SET 9 SAMPLING Datalogger sample rate Enter NUMBERS OF REC cea the sample rate in the box in 12 07 05 1242 03 seconds and click on the 12 07 05 14 58 50 SAMPLING bar to store the value NUMBER OF SETS Click on the bar to download the stored data TIME OF RECORDING Click on the bar to display sets downloaded Click on a set to select data for display NUMBERS OF REC Displays t
9. lied software The clock is set in the Control Panel window and the sample rate is set in the Logger window T Set the real time clock if required 2 Set the sample rate if required 3 To record data press amp hold the RECORD key for 3 seconds until the RECORD symbol flashes once per second on the LCD Press the Record key again to stop recording data If the recording memory is full the FULL symbol will appear on the LCD To clear the recording memory press and hold the RESET key and power the meter The LCD will show the dEL icon letting the user know that the datalog memory has been cleared 6 To Download or Record data via a PC refer to the PC Interface section below PC Interface Connecting the Meter to a PC Refer to Figure 5 Connect the 9 pin male connector to the Sound Level Meter and connect the 9 pin female connector to the 9 pin COM1 PC port PC Requirements 486 IBM compatible PC or better One 3 5 high density disk drive Available serial port 6V ADAPTOR a 4M Bytes H D storage space EGA or VGA monitor Windows 95 98 2000 NT XP Operating System 3 button or 2 button Microsoft compatible mouse At least a 486 PC is recommended for displaying all software windows with a fast sampling rate such as 1 second If a 386 25 PC is used you can only open one window LIST GRAPH ANALOG at a time when using fast sampling rates Installing the Windows Application Program Fo
10. llow the instructions on the disk for installation When installing the software please use the Visual Basic version VB on installation CD 6 407764 EU EN V2 2 5 11 Software Control Panel Description METER SIMULATION The Control Panel The left side of the Control Panel window provides a replica of the meter s front panel and display MAX AIC RESET F S REC LEVEL Hold and update maximum value A C weighting selection Reboot and clear the data memory Fast Slow selection Enable datalogging Set range DATA ACQUISITION CONTROLS and DISPLAYS MIN MAX TIME SAMPLING TIME PC SAMPLING lt RESET gt SYSTEM TIME SET SAVE AS OPEN FILE FILE NAME START RECORDING STOP RECORDING EXIT Selecting the datalog sample rate Displays the minimum value recorded Displays the maximum value recorded Displays the Real Time Clock Setting Display of data acquisition sampling rate Fig 7 Opens data acquisition sampling rate selection box Datalogging sample rate is set in the MEMORY Logger window Resets the MIN and MAX stored readings Sets the meter s clock to the value of the pc clock Opens the data file storage window dat Opens the data file retrieve window dat Fig 8 Displays name and location of data acquisition file After opening a file click to start recording Stop recording and close the file Close program Opening a datalog file dat i open zixl F
11. llows 40 to 90dB A Frequency Weighting and FAST Response Time 2 The LCD will reflect the meter s configuration Measurement Considerations 1 Use a windscreen to cover the microphone in windy conditions Calibrate the meter often especially if the meter has not been used for a long time Do not store operate the meter in high temperature humidity for long periods of time Keep the meter and the microphone dry Avoid severe vibration when using the meter Remove the battery when the meter will be stored for long periods of time Oy OV BO Frequency Weighting 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 boosting and cutting the noise amplitude over the frequency spectrum see Appendix A weighting is used for environmental measurements OSHA regulatory testing law enforcement and workplace design Select C weighting for flat response measurements no boost or cut C weighting is suitable for the sound level analysis of machines engines etc Most OSHA related testing is performed using A Weighting and SLOW Response Time settings Response Time Change the Response Time by pressing the FAST SLOW button The FAST or SLOW icon will display on the upper area of the LCD Note Select FAST to capture noise peaks and noises that occur very quickly
12. our min sec Set sampling rate Send 3 bytes W high byte low byte leading byte 1 65535 sec Set ID code Send 3 bytes X high byte low byte leading byte 1 65535 Get software version Output V Receive 1 byte 0 255 Get system argument Output Y Receive 10 bytes ID Code Version ID code Data sets Last address Sample rate 2bytes 1 byte 1 byte 1 byte 3 bytes 2 bytes Get time and date Output C Receive 6 bytes YY MM dd hh mm ss Receive 6 bytes Sets YY MM dd hh mm ss Status Sample rate Records Get Record Output K N records Receive YY MM dd hh mm ss Status Sampling ratetRecords 1 record 2 record nth record Erase Command EEE 3 bytes Set MAX spl M 1 byte Switch Fast Slow F 1 byte Stop Recording T 1 byte Switch A C A 1 byte Start Recording S 1 byte Switch range U up P down 1 byte 12 407764 EU EN V2 2 5 11
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