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Turning on

Softkeys

Sound Examiner SE-400 Series

Turning on

To turn on the SE-400 Series, press the

key until the start screen appears. Note: the warm-up is 10 seconds.

Softkeys

The softkey menus provide additional/extension menus on the display and may be available in the measurement, setup, and

calibration screens. See Table 2-1 for details.

Table 2-1: Softkeys explained

Screen indicators

The screen indicators, located at the top of the display, are a notification tool to alert the user of operational functions. See Table

2-2 for details.

Table 2-2: Screen indicators

Softkeys Explanation

Setup

icon

– The setup icon is used to access the main menu options including: unit information, settings,

calibration, memory, time-date, communications, and security (for secure run and secure setup modes).

Fast or Slow Response Time

- The response time setting determines how quickly the unit responds to fluctuating

noise. Typically, noise is not constant. If you were to try to read the sound level without a response time, the readings

would fluctuate so much that determining the actual level would be extremely difficult. While the terms slow and fast

have very specific meanings (time constraints), they work very much as you would expect. The fast response would

result in a more fluctuating sound level reading than would the slow response.

ACZ

A, C, or Z Frequency Weighting

- These are frequency filters that approximate the equal loudness response of

human hearing at low, medium, and high SPL’s. A frequency weighting is the most commonly used filter defined in

the international standard IEC 61672:2003. Common applications of A weighting include industrial noise applications

and community noise regulations. The A frequency weighted filter makes the sound level meter respond closer to the

way the human ear responds to noise at lower levels. It attenuates the low frequency noise below several hundred

Hertz as well as the high frequency above six thousand Hertz. C frequency weighting is intended to represent how

the ear responds to very high levels. Z weighting is a type of flat response.



Printer icon

- is used for an add-on feature, referred to as the SoundPatrol (available on SE-400 Non-IS models

only.) This feature enables one to print to a hand-held printer while measuring or after a run (or session). Note: this

may be used for noise enforcement situations.

CAL

– Cal, or Calibration screen, is used for calibrating the SE-400 Series.

LOCK

– Shortcut to the secure modes screen. Enables and disables secure and setup modes.

Up Arrow indicator

: Used in the calibration screen to increase the calibration value.

Down arrow indicator

: Used in the calibration screen to decrease the calibration value.

Indicators

Explanation

Secure/Lock indicator

- appears if security for run or setup is enabled.

Overload indicator –

appears whenever the level measurement exceeds the range of the instrument.

UnderRange indicator

– appears whenever a level measurement is below the range of the instrument.

Run indicator-

appears when a session is running (measuring integrating measurements.)

Stop indicator-

appears when the current session is stopped.

00:00:00

Run Time

: displays the current elapsed logged session run time in hours, minutes, and seconds.

Battery charge status

- blinks when the battery is low and needs charging. The battery icon shows the

status/level of the internal battery. A full battery indicates the SE-400 Series is fully charged where as a non-

shaded battery icon indicates the battery power is low. When charging, the battery icon will appear as a

scrolling, shaded battery charge icon.

Содержание SE-401

Страница 1: ... Division 3MTM Sound Examiner SE 400 SeriesSound Level Meters with Intrinsically Safe models User Manual SE 400 Series Sound Level Meter Sound Examiner SE 401 SE 402 non IS models SE 401 SE 402 Intrinsically Safe models ...

Страница 2: ...ution General Substitution of components may impair the accuracy of the instrument Repair should be performed by authorized service personnel only The battery in this instrument has limited shelf life even if never used A non condensing environment is required for proper measurements Do not charge battery outside the range of 0 C to 40 C 32 F to 104 F Battery run time may be reduced when operating...

Страница 3: ... Do not store in temperatures outside 20 C to 60 C 13 F 140 F Do not immerse in liquids Condensation may damage your instrument Substitution of components may impair the accuracy of the instrument Repair should be performed by authorized service personnel only Caution General The battery in this instrument has limited shelf life even if never used A non condensing environment is required for prope...

Страница 4: ... CE mark 0539 SE 401 IS model and SE 402 IS model UL 913 Ed 7 2011 09 23 Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I II III Division 1 Hazardous Classified Locations CSA C22 2 No 157 92 R2013 Intrinsically Safe and Non Incendive Equipment for Use in Hazardous Locations EN 60079 0 2009 Explosive atmospheres Equipment General requirements EN 60079 11 2012 Ex...

Страница 5: ...n 5 Softkeys 5 Screen indicators 5 Measurement Start screen 6 Navigating 6 Turning off 6 Charging 7 Charging states 7 Setup instrument configuration 8 Response time and frequency weighting settings 8 Opening the setup screen for instrument configuration 9 Meter settings 10 SE 400 Series information details 11 Time and date setting 12 Security locking and unlocking run setup 14 Memory and space 15 ...

Страница 6: ... Printing and reports 27 Microphone preamp 28 Attaching the preamp 28 Connecting an extension cable 28 Standards Directives 30 Acoustical Characteristics 30 Microphones 30 Measurements 31 Calibration 31 Mechanical Characteristics 31 Physical Characteristics 31 Environmental Characteristics 31 User Interface Characteristics 32 Power Electrical Characteristics 32 Ports and connections 32 SE 400 Seri...

Страница 7: ... Figure 4 1 SE 400 Series and calibrating 17 Figure 4 2 Calibration softkey selection 17 Figure 4 3 Calibration screen 18 Figure 4 4 CAL screen 18 Figure 4 5 Example of logged data in DMS 19 Figure 4 6 SE 400 Series with windscreen 19 Figure 4 7 Measurement positioning and tripod mount 20 Figure 4 8 Main multi measurement screen in Run mode 21 Figure 4 9 Single measurement screen in stop mode 21 F...

Страница 8: ...ted for by three primary characteristics intrinsic safety accuracy of measurement and remote microphone measurement capability The table below summarizes the differences between the models Table 1 1 Sound Examiner SE 400 IS and non IS models explained Sound Examiner SE 400 Series overview Display and keypad The keypad is used to run and stop your sessions view your measurement values select specif...

Страница 9: ...ting environment nighttime session 3 Up Arrow key Used to toggle through menu setup options and scrolls through the values on the measurement screen 4 Left Arrow key Used to navigate through menus and setup parameters 5 Run Stop key Used to run and stop a logged session 6 Right Arrow key Used to navigate through menus and setup parameters 7 Enter key Used to select menus and confirm setup paramete...

Страница 10: ...he instrument and post session analysis to be performed with the DMS software It is also used to charge the internal battery of the SE 400 Series 3MTM Detection Management Software DMS DMS is a software application from 3M that is used for a variety of Sound Examiner functions including the ability to display and manipulate data after it is downloaded to the computer from the instrument Additional...

Страница 11: ...in a storage case you will want to remove the packaging and acquaint yourself with the equipment so you can quickly get started The items below are included in a standard Sound Examiner SE 400 Series kit with a calibrator Figure 2 1 Identify SE 400 Series equipment CHAPTER 2 SE 400 IS model Removable Preamp when equipped on model SE 402R Windscreen USB cable USB power cord with universal plug adap...

Страница 12: ...gulations The A frequency weighted filter makes the sound level meter respond closer to the way the human ear responds to noise at lower levels It attenuates the low frequency noise below several hundred Hertz as well as the high frequency above six thousand Hertz C frequency weighting is intended to represent how the ear responds to very high levels Z weighting is a type of flat response Printer ...

Страница 13: ...t in larger font Press arrow to scroll through the measurements To toggle between the two types of screens press key Figure 2 2 Measurement screen displaying multiple measurements Navigating To navigate through the menus and data screens press the arrows arrows or press one of the softkeys The Enter key is used to select menus and toggle through settings The On Off Esc key is also used as a naviga...

Страница 14: ...owing warning Low USB power to charge When charging the battery indicator will scroll shading in the indicator When the battery is fully charged the battery indicator will stop scrolling See Figure below Charging states A fully charged battery state indicates approximately 18 hours of run time without a backlight for the non IS models and 9 hours for IS models A low battery state will display a bl...

Страница 15: ...tting Response time and frequency weighting settings Sound level measurements are performed typically with A frequency weighting a slow time response and a 3 dB exchange rate The time response and frequency weightings may be changed via the softkeys on any measurement screen when in stop mode 1 To change the frequency weighting repeatedly press the corresponding softkey to toggle and select A C or...

Страница 16: ...tings can be accessed or changed when in stop mode by selecting the icon via the corresponding softkey see A below The Setup screen appears See B below Figure 3 2 Opening the Setup screen Softkey Press to select the corresponding setup menu Setup icon Press the softkey to open the menu B 1 Setup screen non IS models A Start screen Measurement screen B 2 Setup screen IS models ...

Страница 17: ...From the setup screen press keys to select Settings and press key Figure 3 3 Choosing meter settings 2 To select one of the meter settings press keys Once selected press key This moves the selection to the changeable value field 3 To change the log rate exchange rate peak weighting language and or contrast press keys Press key to save the selection Repeat as necessary or escape to abort Figure 3 4...

Страница 18: ...table as A C or Z weighting Note peak weighting may be different than SPL weighting Please refer to the Glossary for more information Language The language setting has eight different selections including English French Spanish Italian Portuguese German Chinese Simplified Korean Contrast The contrast setting is used to increase or decrease the darkness lightness of the display Contrast settings in...

Страница 19: ...eters 1 From the setup screen select Time Date by pressing the keys and press key 2 To change the Time or Date fields press the key to select and press key 3 Press arrows to change the values To move to the next field press arrows 4 Press key to save or escape to abort Repeat steps 2 through 4 to change Time and or Date 5 To exit the screen press key This will return to the previous screen To retu...

Страница 20: ...re 3 7 Auto Run screen 3 To select timed run press keys until it appears and press key The duration field will appear See Figure 3 8 below Note to turn off this feature repeat this step until disabled appears 4 To enter in a time press key to move the time field Using the keys change the time and press key while repeating this to move to the hours minutes and seconds field 5 Press key to save and ...

Страница 21: ... SE 400 Series Note if stop is pressed during secure run the screen will display the following alert message In secure run mode To unlock type in the 4 digit code and press the enter key Lock unlock secure setup When in secure setup mode a lock symbol appears in the screen indicator section To unlock type in the 4 digit code and press the enter key Secure run mode and secure setup mode locking unl...

Страница 22: ... 2 Delete all sessions will be shaded Press key and a Confirm pop up screen will appear 3 Press key to select Yes and press key to delete files To cancel either press key when No is shaded or press key 4 To exit the screen press key This will return to the previous screen To return to a measurement main screen press key a second time Figure 3 10 Deleting sessions files and viewing memory Resetting...

Страница 23: ... with reference to the output of a calibrated sound source 3M offers a line of acoustic calibrators that are available for performing calibration of the Sound Examiner such as the 3MTM AcousticCal AC 300 Calibrator and the QC10 20 calibrator Performing a Calibration Before beginning your calibration confirm check the calibrator has sufficient battery power to perform the calibration Also you will ...

Страница 24: ...rom the main measurement screen press the corresponding softkey for the menu 5 Press the Cal softkey or select Calibration Figure 4 2 Calibration softkey selection CAL softkey Press corresponding softkey Cal Adapter Insert into cavity of the AC 300 AcoustiCal AC 300 Calibrator Select 1000Hz and 114 dB Microphone Place calibrator over microphone Calibration ...

Страница 25: ...intable in the software Figure 4 3 Calibration screen 7 In the calibration screen press the corresponding softkeys or press to adjust to the specific dB level noted on the calibrator Figure 4 4 CAL screen 8 Press the key to save the changes or escape to abort 9 Press the key twice to return to the main measurement screen Opening CAL screen to perform calibration Either press the key or press the C...

Страница 26: ...t while the logged data is viewable in DMS Below is an example of DMS logged data chart Figure 4 5 Example of logged data in DMS Windscreen The SE 400 Series features a removable windscreen which is primarily used to help reduce noise effects from wind with minimal effects on the readings It is recommended to place and use the windscreen over the microphone at all times to help protect the microph...

Страница 27: ...lease see Glossary of Terms in Appendix B for more information Measurement Parameters Explanations SPL LAS Sound pressure level is the basic measurement of noise loudness expressed in decibels SPL measured with A weighting and slow time response is displayed as LAS or SPL LASMX Maximum sound pressure level with A weighting and slow response Displayed when in run or stop modes LAPK Peak sound press...

Страница 28: ...d 1 To start a session press the key The Run icon will appear with a run time clock indicating the current duration of your session Figure 4 8 Main multi measurement screen in Run mode 2 To stop a session press the key The Stop icon will appear Note the duration of the session is indicated by the run time clock 3 To view a single large measurement press the key To view different measurement parame...

Страница 29: ... The steps below explain how to review the session data 1 From the measurement screen press the softkey 2 From the setup screen press keys to select Memory and press key 3 With Session Directory selected indicated by the black shaded bar press key Figure 4 10 Session directory screen 4 Press arrow keys to select a specific session and press key to view data Note the SE 400 series runs are stored a...

Страница 30: ...to view your data or measurements this section will guide you through communicating between the Sound Examiner SE 400 Series and DMS which will enable you to view time history data in logged data charts and tables with reporting and storage capabilities as displayed below Note please reference the online DMS help for more information Figure 4 13 Sample Sound Examiner data report Summary data Sessi...

Страница 31: ... SE 400 Series 1 SE 400 Series and communicating with DMS A Turn On SE 400 Series B Plug in USB cable from SE 400 Series to the computer 3 SE 400 Series and Downloading A Select the SLM family and the Sound Examiner from the Instrument window B Click button See A Note the downloaded files are listed by file name size and date under the instrument download section See B 2 DMS Welcome page and instr...

Страница 32: ...etting Connecting the printer and adjusting viewing the baud rate for the SoundPatrol feature 1 Connect the SP Fuji cable 057 341 by inserting it into the serial port on the bottom of the SE 400 non IS models 2 Turn on the portable printer by depressing and holding the power button for about 1 second A green LED blinks when the printer is ready Note refer to the portable thermal printer manual to ...

Страница 33: ...ing the summary report print settings 1 From the setup menu press keys to select Print Settings and press key 2 To select a parameter to change press keys and then press key to move to the second column 3 To change to Print or Omit press and press key to save and return to the first column Figure 4 16 Print Setup screen 4 Repeat steps 2 and 3 to change what appears on the hand held print report To...

Страница 34: ...Data Report TResponse SLOW SPLmax 78 8 dBA Leq 71 5 dBA LAE 84 9 dBA SPLmin 64 4 dBA Runtime 00 00 17 Date 15 Mar 2012 Time 9 21 54 Location __________________ By ______________________ The summary data report displays the time response and the summary data parameters including the maximum sound pressure level SPL the average SPL Leq the minimum SPL the runtime date time location and a by field fo...

Страница 35: ...surements by distancing the microphone from the instruments body 1 To connect the microphone to the extension cable first remove the preamp from the SE 400 and familiarize yourself with the extension cable ends Figure 4 17 Example of extension cable and preamp 2 Insert the extension cable s pins see B above into the preamp noting it will snap into place when the pins are aligned correctly Next twi...

Страница 36: ...d LEQ ata specific logged interval The SE 400 non IS models will log approximately 57 600 records per parameter in 60 seconds at 40 days with a 2MB card Below is a table outlining different logged intervals with the number of days it will log Logging Rates seconds or minutes Days Logged Records 5 sec 3 57 600 15 sec 10 57 600 30 sec 20 57 600 60 sec 40 57 600 5 min 200 57 600 15 min 599 57 600 30 ...

Страница 37: ...ity EMC Part 4 3 Testing and Measurement Techniques Radiated Radio Frequency Electromagnetic Field Immunity Test ANSI S1 4 1983 R2006 American National Standard Specification for Sound Level Meters ANSI S1 43 1997 R2007 American National Standard Specifications for Integrating Averaging Sound Level Meters CE mark 0539 SE 401 IS model and SE 402 IS model UL listed E87792 SE 401 IS model and SE 402 ...

Страница 38: ...X 7 1 cm W X 3 3 cm H Weight 410 g 14 5oz SE 401 IS model including preamp and microphone 410 g 14 5oz SE 402 IS model including preamp and microphone 367 5g 12 96oz SE 401 model including preamp and microphone 380 5g 13 42oz SE 402 model including pre amp and microphone Housing Stainless fiber filled ABS Polycarbonate with light grey front and dark grey backing Tripod Mount Standard photographic ...

Страница 39: ... include dim bright and off SE 400 IS models Power Electrical Characteristics Battery for SE 401 and SE 402 Non IS models Lithium Polymer 2500 mAHr rechargeable Run Time 18 hours minimum excluding the backlight Battery for SE 401 and SE 402 IS models Lithium Polymer Pack Nominal 3 7V 1500 mAH rechargeable 3M manufactured p n 073 709 Run Time 8 hours minimum excluding backlight Battery Life 3 years...

Страница 40: ...pter carry case and user manual 70 0716 0793 4 3MTMSound Examiner SE 401 Intrinsically Safe model Includes meter with Class Type 1 Microphone USB cable external power cord with USB windscreen calibrator adapter carry case and user manual Accessories sold separately 3M ID Part Number Description 70 0715 8115 4 056 990 Calibrator Adapter for 0 50 or 1 3 cm diameter microphone for QC 10 20 or Acousti...

Страница 41: ...e weighted average the measured dose would double Some organizations such as OSHA in the U S have argued that the human ear self compensates for changing noise levels and they felt that the 3 dB Exchange Rate should be changed to more closely match the response of the human ear OSHA currently uses a 5 dB Exchange Rate which would mean that the reported dose would double with every 5 dB increase in...

Страница 42: ...ise that was sampled SEL is typically measured using a 3dB exchange rate without a threshold LAE is not used by OSHA LMn Minimum SPL Lowest SPL measured over a time interval LMx Maximum SPL Highest SPL measured over a time interval Logging In sound studies the saving of measurements at fixed intervals during a study where each measurement is determined from data processed in the previous logging i...

Страница 43: ...ns This generally accepted magnitude of this pressure is 2 00002 Pascals Response time Fast F Slow S Selectable time response settings used in the Sound Examiner measurements The response time is a standardized exponential time weighting of the input signal according to fast F or slow S time response relationships Time response can be described with a time constant The time constants for fast and ...

Страница 44: ...man ear the ratio is calculated logarithmically by the formula below where Lr is the reference pressure Threshold An SPL value that defines a lower level of acceptable values Only SPL samples that exceed the threshold are used in some calculations Upper Limit UL The total time during a study that the SPL exceeds the Upper Limit meter setting SPL 2 0l o g L Lr d B Relative response dB Burst duratio...

Страница 45: ...y components in order to provide a consistent basis for comparison to other measurements of the same type The three Sound Examiner curves are plotted in Figure B 5 Figure B 5 All frequency weightings plotted together Windscreen A covering for a microphone that reduces disturbances caused by wind and direct contact with other surfaces ...

Страница 46: ...s recommended Please see Service Department above Warranty 3M warrants our instruments to be free from defects in materials and workmanship for one year under normal conditions of use and service For United States customers we will replace or repair our option defective instruments at no charge excluding batteries abuse misuse alterations physical damage or instruments previously repaired by other...

Страница 47: ... with SPL A Weighting and LEQ A Weighting sections 5 5 10 5 5 11 9 2 7e 9 3e 9 3f Note Reference level 114 dB Cal Point 400mVrms 114 dB 1 kHz Frequency SPL A Weighting LEQ A Weighting Linear Operating Range dB Linear Operating Range dB 31 5 75 140 75 140 1000 34 140 34 140 4000 33 140 33 140 8000 37 140 37 140 12500 42 140 42 140 Linear operating range with SPL C Weighting and LEQ C Weighting sect...

Страница 48: ...he equivalent input voltages for Type Class 1 and Type Class 2 at 1 kHz are listed below Maximum input level sections 5 1 16 9 3i The maximum acoustic input level is 150 dB The maximum level at the electrical input is 11 VAC Self generated noise levels sections 5 6 1 5 6 2 5 6 3 9 3 Level of self generated noise in decibels dB Applies to time average and both fast and slow time weighting To measur...

Страница 49: ...rce of interest When it is not possible to eliminate or reduce the background noise use the curve shown in Figure 4 to correct for the effect of the background noise on the measurement For example if the background noise is 45 dB and the sound of interest measures 51 dB the difference between measurement and background noise is 6 dB From Figure 4 for a 6 dB difference 1 3 dB should be subtracted f...

Страница 50: ...ner SE 400 Series 43 Frequency weighting sections 5 1 10 5 4 12 A Weighting Nominal The graph below is the nominal A weighting frequency response C Weighting Nominal The graph below is the nominal C weighting frequency response ...

Страница 51: ...ndum Sound Examiner SE 400 Series 44 Z Weighting Nominal The graph below is the nominal Z weighting frequency response A Weighting Typical The graph below is the frequency typical A weighting frequency response ...

Страница 52: ...Sound Examiner SE 400 Series 45 C Weighting Typical The graph below is the frequency weighting Typical C weighting frequency response Z Weighting Typical The graph below is the Typical Z weighting frequency response ...

Страница 53: ...5012 0 1 5309 0 0 5623 0 2 5957 0 2 6310 0 1 6683 0 0 7079 0 4 7499 0 0 7943 0 0 8414 0 2 8913 0 1 9441 0 1 10000 0 1 10593 0 1 11220 0 4 11885 0 0 12589 0 1 13335 0 1 14125 0 4 14962 0 5 15849 0 7 Nominal Frequency Hz Nominal corrections in dB 63 0 6 80 0 4 100 0 3 125 0 4 160 0 2 200 0 2 250 0 3 315 0 1 400 0 2 500 0 2 630 0 2 800 0 0 1000 0 0 1059 0 0 1122 0 0 1189 0 1 1259 0 0 1334 0 2 1413 0 ...

Страница 54: ...732 0 1 5012 0 1 5309 0 0 5623 0 2 5957 0 2 6310 0 1 6683 0 0 7079 0 4 7499 0 0 7943 0 0 8414 0 3 8913 0 3 9441 0 3 10000 0 3 10593 0 2 11220 0 4 11885 0 2 12589 0 3 13335 0 5 14125 0 9 14962 1 0 15849 1 2 Nominal Frequency Hz Nominal corrections in dB 63 0 6 80 0 4 100 0 3 125 0 4 160 0 2 200 0 2 250 0 3 315 0 2 400 0 3 500 0 2 630 0 3 800 0 0 1000 0 0 1059 0 1 1122 0 1 1189 0 1 1259 0 2 1334 0 1...

Страница 55: ... 0 7 2985 0 3 80 0 5 3162 0 3 100 0 4 3350 0 6 125 0 5 3548 0 7 160 0 3 3758 0 8 200 0 3 3981 1 0 250 0 4 4217 0 9 315 0 2 4467 0 8 400 0 3 4732 1 0 500 0 2 5012 1 1 630 0 3 5309 1 4 800 0 1 5623 1 4 1000 0 0 5957 1 5 1059 0 0 6310 1 8 1122 0 1 6683 2 1 1189 0 1 7079 2 1 1259 0 3 7499 2 6 1334 0 2 7943 2 8 1413 0 1 8414 3 0 1496 0 1 8913 3 3 1585 0 2 9441 3 6 1679 0 3 10000 3 7 1778 0 3 10593 4 0 ...

Страница 56: ...2 400 0 2 500 0 2 630 0 2 800 0 0 1000 0 0 1059 0 0 1122 0 1 1189 0 1 1259 0 2 1334 0 1 1413 0 2 1496 0 2 1585 0 3 1679 0 3 1778 0 4 1884 0 4 1995 0 5 2113 0 6 2239 0 6 2371 0 6 2512 0 5 2661 0 7 2818 0 7 Nominal Frequency Hz Nominal corrections in dB 2985 0 6 3162 0 7 3350 0 8 3548 1 0 3758 1 1 3981 1 3 4217 1 2 4467 1 1 4732 1 2 5012 1 3 5309 1 6 5623 1 6 5957 1 8 6310 2 0 6683 2 4 7079 2 3 7499...

Страница 57: ...00 0 2 500 0 1 630 0 2 800 0 0 1000 0 0 1059 0 1 1122 0 1 1189 0 1 1259 0 2 1334 0 0 1413 0 0 1496 0 1 1585 0 1 1679 0 2 1778 0 1 1884 0 2 1995 0 2 2113 0 2 2239 0 1 2371 0 1 2512 0 1 2661 0 1 2818 0 1 Nominal Frequency Hz Nominal corrections in dB 2985 0 1 3162 0 2 3350 0 2 3548 0 3 3758 0 2 3981 0 2 4217 0 3 4467 0 4 4732 0 3 5012 0 1 5309 0 0 5623 0 5 5957 0 8 6310 0 6 6683 0 1 7079 0 4 7499 0 ...

Страница 58: ...15 0 0 400 0 1 500 0 0 630 0 1 800 0 1 1000 0 0 1059 0 1 1122 0 1 1189 0 1 1259 0 3 1334 0 1 1413 0 0 1496 0 0 1585 0 0 1679 0 0 1778 0 1 1884 0 0 1995 0 1 2113 0 1 2239 0 2 2371 0 2 2512 0 3 2661 0 3 2818 0 3 Nominal Frequency Hz Nominal corrections in dB 2985 0 3 3162 0 3 3350 0 3 3548 0 3 3758 0 3 3981 0 3 4217 0 2 4467 0 0 4732 0 2 5012 0 3 5309 0 4 5623 0 1 5957 0 2 6310 0 2 6683 0 7 7079 0 2...

Страница 59: ... 0 5 3981 0 6 4217 0 6 4467 0 6 4732 0 8 5012 1 2 5309 1 4 5623 1 0 5957 1 0 6310 1 5 6683 2 2 7079 2 0 7499 2 2 7943 2 4 8414 2 8 8913 3 6 9441 3 1 10000 3 6 10593 4 1 11220 3 7 11885 4 0 12589 4 1 13335 3 5 14125 3 1 14962 2 4 15849 1 7 Nominal Frequency Hz Nominal corrections in dB 63 0 4 80 0 2 100 0 1 125 0 2 160 0 0 200 0 0 250 0 1 315 0 0 400 0 1 500 0 0 630 0 2 800 0 1 1000 0 0 1059 0 1 11...

Страница 60: ...15 0 1 400 0 0 500 0 1 630 0 1 800 0 0 1000 0 0 1059 0 1 1122 0 2 1189 0 2 1259 0 4 1334 0 3 1413 0 2 1496 0 1 1585 0 0 1679 0 1 1778 0 1 1884 0 1 1995 0 3 2113 0 5 2239 0 4 2371 0 6 2512 0 6 2661 0 7 2818 0 7 2985 0 7 Nominal Frequency Hz Nominal corrections in dB 3162 0 8 3350 0 8 3548 0 9 3758 1 0 3981 1 0 4217 1 0 4467 1 0 4732 1 2 5012 1 5 5309 1 7 5623 1 3 5957 1 4 6310 2 1 6683 2 7 7079 2 5...

Страница 61: ...tion corrections section 5 2 8 Note Add correction to electrical frequency response Nominal Frequency Hz Nominal corrections in dB 63 0 6 80 0 4 100 0 3 125 0 4 160 0 2 200 0 2 250 0 3 315 0 2 400 0 2 500 0 2 630 0 2 800 0 0 1000 0 0 1250 0 1 1600 0 2 2000 0 3 2500 0 3 3150 0 3 4000 0 9 5000 1 0 6300 1 4 8000 1 1 ...

Страница 62: ...rections with windscreen section 5 2 8 Note Add correction to electrical frequency response Nominal Frequency Hz Nominal corrections in dB 63 0 5 80 0 3 100 0 1 125 0 2 160 0 0 200 0 1 250 0 2 315 0 0 400 0 1 500 0 0 630 0 2 800 0 0 1000 0 0 1250 0 3 1600 0 3 2000 0 5 2500 0 6 3150 0 6 4000 1 1 5000 1 0 6300 1 3 8000 0 7 ...

Страница 63: ...onse B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Co r ctions n dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 2 250 0 1 315 0 0 400 0 1 500 0 2 630 0 1 800 0 0 1000 0 0 1250 0 0 1600 0 2 2000 0 4 2500 0 5 3150 0 8 4000 1 6 5000 2 1 6300 3 1 8000 3 9 10000 5 3 12500 6 2 16000 8 4 ...

Страница 64: ...ld response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 2 250 0 1 315 0 0 400 0 1 500 0 2 630 0 1 800 0 0 1000 0 0 1250 0 0 1600 0 2 2000 0 4 2500 0 5 3150 0 8 4000 1 6 5000 2 1 6300 3 1 8000 3 9 10000 5 3 12500 6 2 16000 8 4...

Страница 65: ...esponse B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 0 250 0 0 315 0 2 400 0 2 500 0 2 630 0 2 800 0 1 1000 0 0 1250 0 2 1600 0 4 2000 0 7 2500 1 0 3150 1 5 4000 2 5 5000 3 4 6300 5 0 8000 6 8 10000 9 1 12500 10 3 16000 10 5 ...

Страница 66: ... free field response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 3 250 0 2 315 0 1 400 0 1 500 0 1 630 0 0 800 0 0 1000 0 0 1250 0 4 1600 0 2 2000 0 7 2500 1 3 3150 1 9 4000 2 5 5000 3 7 6300 5 3 8000 6 9 10000 9 4 12500 9 2 ...

Страница 67: ...ce free field response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 2 250 0 1 315 0 0 400 0 1 500 0 2 630 0 1 800 0 0 1000 0 0 1250 0 2 1600 0 6 2000 0 9 2500 1 2 3150 1 8 4000 2 8 5000 3 5 6300 5 3 8000 7 1 10000 9 2 12500 9 ...

Страница 68: ...eld response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 2 250 0 1 315 0 0 400 0 0 500 0 1 630 0 1 800 0 0 1000 0 0 1250 0 2 1600 0 1 2000 0 2 2500 0 6 3150 0 9 4000 1 3 5000 2 1 6300 2 7 8000 3 3 10000 4 8 12500 6 4 16000 8 ...

Страница 69: ... free field response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 1 250 0 0 315 0 0 400 0 0 500 0 1 630 0 0 800 0 1 1000 0 0 1250 0 3 1600 0 2 2000 0 5 2500 0 9 3150 1 4 4000 1 7 5000 2 4 6300 3 1 8000 3 8 10000 5 2 12500 6 2 ...

Страница 70: ...free field response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 3 250 0 1 315 0 0 400 0 0 500 0 0 630 0 0 800 0 1 1000 0 0 1250 0 4 1600 0 1 2000 0 4 2500 0 9 3150 1 4 4000 2 0 5000 3 4 6300 4 8 8000 6 4 10000 9 0 12500 10 5 ...

Страница 71: ...e field response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz BK4936 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 0 50 0 1 63 0 1 80 0 1 100 0 1 125 0 1 160 0 1 200 0 3 250 0 1 315 0 0 400 0 0 500 0 0 630 0 0 800 0 1 1000 0 0 1250 0 4 1600 0 1 2000 0 4 2500 0 9 3150 1 4 4000 2 0 5000 3 4 6300 4 8 8000 6 4 10000 9 0 12500 10 5 160...

Страница 72: ...nse B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz QE7052 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 1 50 0 0 63 0 1 80 0 2 100 0 3 125 0 3 160 0 3 200 0 0 250 0 1 315 0 1 400 0 1 500 0 1 630 0 1 800 0 0 1000 0 0 1250 0 0 1600 0 2 2000 0 4 2500 0 5 3150 0 5 4000 1 3 5000 2 3 6300 4 4 8000 5 0 10000 4 5 12500 5 6 16000 7 9 ...

Страница 73: ...ld response B K 4226 calibrator may be used to determine the pressure field response Frequency in Hz QE7052 microphone Pressure Field to Free Field Corrections in dB 32 0 1 40 0 1 50 0 0 63 0 1 80 0 2 100 0 3 125 0 3 160 0 3 200 0 3 250 0 2 315 0 1 400 0 1 500 0 1 630 0 0 800 0 0 1000 0 0 1250 0 2 1600 0 3 2000 0 5 2500 0 8 3150 0 9 4000 1 5 5000 2 3 6300 4 3 8000 4 7 10000 3 9 12500 5 2 16000 7 2...

Страница 74: ... response to calculate random incidence response Frequency in Hz BK4936 microphone Random Incidence Corrections in dB 32 0 3 40 0 3 50 0 2 63 0 1 80 0 0 100 0 0 125 0 1 160 0 0 200 0 0 250 0 1 315 0 0 400 0 1 500 0 0 630 0 1 800 0 2 1000 0 0 1250 0 2 1600 0 3 2000 0 1 2500 0 2 3150 0 3 4000 0 4 5000 0 8 6300 1 2 8000 1 3 10000 2 2 12500 2 4 16000 3 6 ...

Страница 75: ...re response to calculate random incidence response Frequency in Hz BK4936 microphone windscreen Random Incidence Corrections in dB 32 0 4 40 0 3 50 0 2 63 0 2 80 0 0 100 0 0 125 0 1 160 0 0 200 0 0 250 0 1 315 0 0 400 0 2 500 0 0 630 0 1 800 0 0 1000 0 0 1250 0 1 1600 0 2 2000 0 1 2500 0 4 3150 0 6 4000 0 9 5000 1 1 6300 1 4 8000 1 4 10000 2 2 12500 2 3 16000 3 0 ...

Страница 76: ...re response to calculate random incidence response Frequency in Hz BK4936 microphone RIC Random Incidence Corrections in dB 32 0 3 40 0 3 50 0 1 63 0 1 80 0 0 100 0 1 125 0 0 160 0 1 200 0 1 250 0 0 315 0 0 400 0 1 500 0 1 630 0 1 800 0 0 1000 0 0 1250 0 2 1600 0 3 2000 0 0 2500 0 2 3150 0 4 4000 0 9 5000 1 7 6300 2 6 8000 3 7 10000 5 6 12500 6 2 16000 5 7 ...

Страница 77: ...re response to calculate random incidence response Frequency in Hz BK4936 microphone RICR windscreen Random Incidence Corrections in dB 32 0 3 40 0 2 50 0 1 63 0 1 80 0 1 100 0 0 125 0 1 160 0 0 200 0 0 250 0 0 315 0 0 400 0 2 500 0 1 630 0 0 800 0 0 1000 0 0 1250 0 2 1600 0 2 2000 0 5 2500 0 8 3150 1 1 4000 1 7 5000 2 3 6300 3 2 8000 4 1 10000 5 9 12500 5 2 16000 3 9 ...

Страница 78: ...re response to calculate random incidence response Frequency in Hz BK4936 microphone RICR windscreen remote preamp Random Incidence Corrections in dB 32 0 3 40 0 2 50 0 1 63 0 1 80 0 1 100 0 0 125 0 1 160 0 0 200 0 0 250 0 0 315 0 0 400 0 2 500 0 1 630 0 0 800 0 0 1000 0 0 1250 0 2 1600 0 2 2000 0 5 2500 0 8 3150 1 1 4000 1 7 5000 2 3 6300 3 2 8000 4 1 10000 5 9 12500 5 2 16000 3 9 ...

Страница 79: ... response to calculate random incidence response Frequency in Hz BK4936 microphone remote preamp Random Incidence Corrections in dB 32 0 4 40 0 4 50 0 3 63 0 2 80 0 1 100 0 1 125 0 1 160 0 0 200 0 0 250 0 2 315 0 1 400 0 2 500 0 1 630 0 2 800 0 1 1000 0 0 1250 0 4 1600 0 0 2000 0 1 2500 0 3 3150 0 4 4000 0 6 5000 0 9 6300 1 3 8000 1 5 10000 2 2 12500 2 6 16000 3 6 ...

Страница 80: ...re response to calculate random incidence response Frequency in Hz BK4936 microphone remote preamp windscreen Random Incidence Corrections in dB 32 0 3 40 0 3 50 0 2 63 0 1 80 0 0 100 0 1 125 0 0 160 0 1 200 0 1 250 0 1 315 0 0 400 0 1 500 0 1 630 0 1 800 0 2 1000 0 0 1250 0 4 1600 0 0 2000 0 1 2500 0 6 3150 1 0 4000 1 5 5000 2 1 6300 2 5 8000 3 1 10000 4 6 12500 5 0 16000 7 1 ...

Страница 81: ...re response to calculate random incidence response Frequency in Hz BK4936 microphone remote preamp RICR Random Incidence Corrections in dB 32 0 5 40 0 5 50 0 4 63 0 3 80 0 2 100 0 1 125 0 2 160 0 1 200 0 1 250 0 3 315 0 2 400 0 3 500 0 1 630 0 2 800 0 0 1000 0 0 1250 0 3 1600 0 1 2000 0 2 2500 0 4 3150 0 7 4000 1 1 5000 1 8 6300 2 7 8000 3 8 10000 5 6 12500 6 1 16000 5 3 ...

Страница 82: ...nse to calculate random incidence response Frequency in Hz QE7052 microphone Random Incidence Corrections in dB 32 0 4 40 0 3 50 0 3 63 0 2 80 0 1 100 0 0 125 0 0 160 0 1 200 0 1 250 0 0 315 0 1 400 0 0 500 0 2 630 0 0 800 0 1 1000 0 0 1250 0 1 1600 0 5 2000 0 3 2500 0 3 3150 0 2 4000 0 2 5000 1 1 6300 2 5 8000 3 0 10000 1 9 12500 2 2 16000 3 3 ...

Страница 83: ...re response to calculate random incidence response Frequency in Hz QE7052 microphone windscreen Random Incidence Corrections in dB 32 0 4 40 0 3 50 0 3 63 0 2 80 0 1 100 0 0 125 0 0 160 0 1 200 0 1 250 0 0 315 0 1 400 0 0 500 0 1 630 0 1 800 0 0 1000 0 0 1250 0 0 1600 0 3 2000 0 1 2500 0 3 3150 0 4 4000 0 7 5000 1 5 6300 2 8 8000 2 9 10000 1 5 12500 2 0 16000 2 8 ...

Страница 84: ...2 1600 0 2 2000 0 3 2500 0 4 3150 0 4 4000 0 2 5000 0 0 6300 0 0 8000 0 0 10000 0 1 12500 0 2 16000 0 5 Windscreen corrections with BK4936 microphone and random incidence corrector ring RICR Note add to the windscreen response to calculate the response without the windscreen Frequency in Hz Corrections in dB 1000 0 0 1250 0 1 1600 0 1 2000 0 2 2500 0 2 3150 0 3 4000 0 3 5000 0 2 6300 0 3 8000 0 3 ...

Страница 85: ... in dB 1000 0 0 1250 0 0 1600 0 1 2000 0 2 2500 0 4 3150 0 5 4000 0 4 5000 0 4 6300 0 5 8000 0 5 10000 0 4 12500 1 2 16000 1 6 Windscreen corrections with BK4936 microphone and remote preamp Note add to the windscreen response to calculate the response without the windscreen Frequency in Hz Corrections in dB 1000 0 0 1250 0 1 1600 0 2 2000 0 4 2500 0 4 3150 0 5 4000 0 4 5000 0 3 6300 0 4 8000 0 5 ...

Страница 86: ...will reset the measurement data and the indicators The time to reset is immediate Minimum Maximum integration time sections 5 17 1 5 17 2 The Minimum Maximum integration time for measurement time average levels Reference direction section 9 2 5a The reference direction is at 0 for both BK4936 and QE7052 microphone The equivalent random incidence direction is 70 AC DC Output Characteristics section...

Страница 87: ...gree Frequency Incidence Incidence Incidence Incidence Incidence Incidence Incidence Random in Hz Angle Angle Angle Angle Angle Angle Angle Field 1000 0 2 0 1 0 0 0 0 0 0 0 0 0 2 0 0 1250 0 3 0 1 0 1 0 1 0 1 0 0 0 5 0 1 1600 0 1 0 0 0 1 0 1 0 1 0 1 0 0 0 1 2000 0 3 0 2 0 2 0 0 0 0 0 0 0 1 0 1 2500 0 1 0 1 0 2 0 2 0 2 0 1 0 0 0 2 3150 0 1 0 2 0 3 0 3 0 3 0 2 0 2 0 3 4000 0 5 0 2 0 4 0 5 0 5 0 4 0 6...

Страница 88: ...nal frequency response of the microphones with the units side or back facing towards the sound source QE7052 microphone side facing QE7052 microphone back facing QE7052 microphone with windscreen side facing QE7052 microphone with windscreen back facing BK4936 microphone side facing BK4936 microphone back facing BK4936 microphone with windscreen back facing BK4936 microphone with windscreen side f...

Страница 89: ...es 82 QE7052 microphone back facing Tolerance IEC 61672 class 2 Directional frequency response facing back toward sound source 0 30 incidence angles Directional frequency response facing back toward sound source 0 90 incidence angles ...

Страница 90: ...x Sound Examiner SE 400 Series 83 Directional frequency response facing back toward sound source 0 150 incidence angles Directional frequency response facing back toward sound source 0 180 incidence angles ...

Страница 91: ...ies 84 QE7052 microphone side facing Tolerance IEC 61672 class 2 Directional frequency response positioned side toward noise source 0 30 incidence angles Directional frequency positioned side toward noise source 0 90 incidence angles ...

Страница 92: ...und Examiner SE 400 Series 85 Directional frequency response positioned side toward noise source 0 150 incidence angles Directional frequency response positioned side toward noise source 0 180 incidence angles ...

Страница 93: ...7052 microphone with windscreen side facing Tolerance IEC 61672 class 2 Directional frequency response positioned side toward noise source 0 30 incidence angles Directional frequency response positioned side noise source 0 90 incidence angles ...

Страница 94: ...ndex Sound Examiner SE 400 Series 87 Directional frequency response positioned side noise source 0 150 incidence angles Directional frequency response positioned side noise source 0 180 incidence angles ...

Страница 95: ...rophone with windscreen back facing Tolerance IEC 61672 class 2 Directional frequency response positioned facing side toward noise source 0 30 incidence angles Directional frequency response positioned facing toward noise source 0 90 incidence angles ...

Страница 96: ...d Examiner SE 400 Series 89 Directional frequency response positioned facing toward noise source 0 150 incidence angles Directional frequency response positioned facing toward noise source 0 180 incidence angles ...

Страница 97: ...936 microphone side facing Tolerance IEC 61672 class 1 Directional frequency response positioned with side toward noise source 0 30 incidence angles Directional frequency response positioned with side toward noise source 0 90 incidence angles ...

Страница 98: ...aminer SE 400 Series 91 Directional frequency response positioned using side toward noise source 0 150 incidence angles Directional frequency response positioned using side toward noise source 0 180 incidence angles ...

Страница 99: ...936 microphone back facing Tolerance IEC 61672 class 1 Directional frequency response positioned back side toward noise source 0 30 incidence angles Directional frequency response positioned back side toward noise source 0 90 incidence angles ...

Страница 100: ...xaminer SE 400 Series 93 Directional frequency response positioned back side toward noise source 0 150 incidence angles Directional frequency response positioned back side toward noise source 0 180 incidence angles ...

Страница 101: ...ophone with windscreen back facing Tolerance IEC 61672 class 1 Directional frequency response positioned back side toward noise source 0 30 incidence angles Directional frequency response positioned back side toward noise source 0 90 incidence angles ...

Страница 102: ...xaminer SE 400 Series 95 Directional frequency response positioned back side toward noise source 0 150 incidence angles Directional frequency response positioned back side toward noise source 0 180 incidence angles ...

Страница 103: ... microphone with windscreen side facing Tolerance IEC 61672 class 1 Directional frequency response positioned side toward noise source 0 30 incidence angles Directional frequency response positioned side toward noise source 0 90 incidence angles ...

Страница 104: ...und Examiner SE 400 Series 97 Directional frequency response positioned side toward noise source 0 150 incidence angles Directional frequency response positioned side toward noise source 0 180 incidence angles ...

Страница 105: ...8 BK4936 microphone using remote preamp Tolerance IEC 61672 class 1 Directional frequency response positioned with a remote preamp 0 30 incidence angles Directional frequency response positioned with a remote preamp 0 90 incidence angles ...

Страница 106: ...x Sound Examiner SE 400 Series 99 Directional frequency response positioned with a remote preamp 0 150 incidence angles Directional frequency response positioned with a remote preamp 0 180 incidence angles ...

Страница 107: ...4936 microphone using windscreen remote preamp Tolerance IEC 61672 class 1 Directional frequency response using windscreen remote preamp 0 30 incidence angles Directional frequency response using windscreen remote preamp 0 90 incidence angles ...

Страница 108: ...ex Sound Examiner SE 400 Series 101 Directional frequency response using windscreen remote preamp 0 150 incidence angles Directional frequency response using windscreen remote preamp 0 180 incidence angles ...

Страница 109: ...4936 microphone with RICR side facing Tolerance IEC 61672 class 1 Directional frequency response positioned side toward noise source 0 30 incidence angles Directional frequency response positioned side toward noise source 0 90 incidence angles ...

Страница 110: ...und Examiner SE 400 Series 103 Directional frequency response positioned side toward noise source 0 150 incidence angles Directional frequency response positioned side toward noise source 0 180 incidence angles ...

Страница 111: ...4936 microphone with RICR back facing Tolerance IEC 61672 class 1 Directional frequency response positioned back toward noise source 0 30 incidence angles Directional frequency response positioned back toward noise source 0 90 incidence angles ...

Страница 112: ...und Examiner SE 400 Series 105 Directional frequency response positioned back toward noise source 0 150 incidence angles Directional frequency response positioned back toward noise source 0 150 incidence angles ...

Страница 113: ...rophone with RICR and windscreen side facing Tolerance IEC 61672 class 1 Directional frequency response positioned side toward noise source 0 30 incidence angles Directional frequency response positioned side toward noise source 0 90 incidence angles ...

Страница 114: ...und Examiner SE 400 Series 107 Directional frequency response positioned side toward noise source 0 150 incidence angles Directional frequency response positioned side toward noise source 0 180 incidence angles ...

Страница 115: ...rophone with RICR and windscreen back facing Tolerance IEC 61672 class 1 Directional frequency response positioned back toward noise source 0 30 incidence angles Directional frequency response positioned back toward noise source 0 90 incidence angles ...

Страница 116: ...und Examiner SE 400 Series 109 Directional frequency response positioned back toward noise source 0 150 incidence angles Directional frequency response positioned back toward noise source 0 180 incidence angles ...

Страница 117: ...BK4936 microphone with RICR and remote preamp Tolerance IEC 61672 class 1 Directional frequency response positioned toward noise source 0 30 incidence angles Directional frequency response positioned toward noise source 0 90 incidence angles ...

Страница 118: ...ex Sound Examiner SE 400 Series 111 Directional frequency response positioned toward noise source 0 150 incidence angles Directional frequency response positioned toward noise source 0 180 incidence angles ...

Страница 119: ... microphone with remote preamp RICR and windscreen Tolerance IEC 61672 class 1 Directional frequency response positioned toward noise source 0 30 incidence angles Directional frequency response positioned toward noise source 0 90 incidence angles ...

Страница 120: ...ex Sound Examiner SE 400 Series 113 Directional frequency response positioned toward noise source 0 150 incidence angles Directional frequency response positioned toward noise source 0 180 incidence angles ...

Страница 121: ...quality and select toxic combustible gases The 3M Detection brand of instrumentation is used by safety and industrial hygiene professionals to help comply with applicable occupational standards and regulations About 3M Personal Safety 3M offers a comprehensive diverse portfolio of Personal Safety solutions providing respiratory protection hearing protection fall protection reflective materials for...

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