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7.8 Function summary table

7.8.1 Reverberation time mode functions

Function

63

125

250

500

1 k

2 k

4 k

Reverberation TimeT

30

X X X X X X X

Reverberation Time T

20

X X X X X X X

Sound pressure level of the
background noise

X X X X X X X

Initial maximum sound
pressure level

X X X X X X X

Time history of the decay curve

X X X X X X X

X:

available (without freq. weighing)

All the functions are measured simultaneously

Function

63 80 100 125 160 200 250 315 400 500 630 800

Reverberation TimeT

30

X

X X X X X X X X X X X

Reverberation Time T

20

X

X X X X X X X X X X X

Sound pressure level of the
background noise

X

X X X X X X X X X X X

Initial maximum sound
pressure level

X

X X X X X X X X X X X

Time history of the decay
curve

X

X X X X X X X X X X X

Function

1k 1k25 1k6 2k 2k5 3k15

4k 5k

Reverberation TimeT

30

X X X X X X X X

Reverberation Time T

20

X X X X X X X X

Sound pressure level of the
background noise

X X X X X X X X

Initial maximum sound
pressure level

X X X X X X X X

Time history of the decay
curve

X X X X X X X X

X:

available (without freq. weighing)

All the functions are measured simultaneously

7.9 Definition of functions

7.9.1 Decay curve

Decay Curve

Decay of the sound pressure level according to time inside the room after
the source is stopped. This decay can be measured after a real cut of the
continuous emission of a sound source at the room that is being studied.

7.9.2 Reverberation Time

T

30

Is the time in seconds that is required for the sound pressure level to
decreases 60 dB, calculated on a line from a lineal regression by least
squares approximation of a decay curve measured from a 5 dB level

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Summary of Contents for SC310

Page 1: ...SC310 Sound Level Meter Spectrum Analyser User s Manual M_SC310_v0033_20070502_ENG ...

Page 2: ...NOTE This version of the manual is valid for instruments with serial number from T224599 ...

Page 3: ... 3 2 Beginning a measurement 26 2 3 3 Functions display 26 2 3 4 Interrupting measurement 29 2 3 5 Consulting measured data 30 2 4 Measuring in spectrum analyser mode 1 1 30 2 4 1 Prior adjustments integration time 30 2 4 2 Beginning measurement 31 2 4 3 Functions display 31 2 4 4 Stopping measurement 34 2 4 5 Consulting the measured data 35 2 5 Measuring in spectrum analyser 1 3 mode 35 2 5 1 Pri...

Page 4: ...58 5 5 Display update rates 59 5 6 Frequency weighting 59 5 7 AC output 60 5 8 Octave band filters 60 5 9 Measurement range octave band spectrum analyser 61 5 10 Third octave band filters 61 5 11 Measurement range one third octave spectrum analyser 62 5 12 Microphone 62 5 13 Diffuse field sensitivity S 64 5 14 Directivity 65 5 15 Effect of the accessories on the microphone 66 5 16 Reference condit...

Page 5: ...asuring the Reverberation Time 82 7 5 2 Visualizing the third octave bands 82 7 5 3 Beginning a measurement 83 7 5 4 Stopping the measurement 84 7 5 5 Overload indicator 85 7 5 6 Indicator 85 7 6 Data register 85 7 6 1 Saving results 85 7 6 2 View register 86 7 7 Technical Specifications 87 7 7 1 Measurement Range 87 7 7 2 Estimation of the slope of the decay curve 89 7 7 3 Standards of measuremen...

Page 6: ...ary table 109 8 11 1 1 3 Extended Spectrum analyser mode functions 109 8 12 FFT narrow band frequency analyser 110 9 APENDIX D Dosimeter Module for the assessment of noise at workplace 111 9 1 Dosimeter module activation 111 9 2 Using the keyboard for the dosimeter mode 112 9 3 Using the SC310 112 9 3 1 Switch on the SC310 112 9 3 2 Accessing to the Dosimeter mode 113 9 3 3 Turn off the SC310 113 ...

Page 7: ...nsulting measured data 132 10 5 7 Overload indicator 132 10 6 Measuring FFT Narrow Band Frequency Analysis 132 10 6 1 Prior adjustments Sensitivity 133 10 6 2 Prior adjustments Evaluation time 134 10 6 3 Beginning the measurement 135 10 6 4 Function display 135 10 6 5 Interrupting the measurement 137 10 6 6 Consulting measured data 137 10 6 7 Overload indicator 138 10 7 Data registering 138 10 7 1...

Page 8: ...6 ...

Page 9: ...nge single scale and simultaneously the following functions The sound pressure level with S F and I time averaging And their maximum and minimum values during the measurement period and each second The peak sound pressure level corresponding to the measurement time and each second The sound exposure level also known as SEL The equivalent continuous sound pressure level with programmable consecutiv...

Page 10: ... equivalent continuous sound pressure level with programmable consecutive integration time of 125 ms and without frequency weighting for each octave band centred on frequencies of 31 5 63 125 250 500 1000 2000 4000 8000 and 16000 Hz The equivalent continuous sound pressure level of the integration time 125 ms and with frequency weighting A C and Z The maximum of the peak sound pressure level corre...

Page 11: ... of 125 ms and without frequency weighting for each one third octave band centred on frequencies of 20 25 31 5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 and 10000 Hz See APPENDIX A Functions for the names and definitions of each of the functions measured The functions in italics are measured by the SC310 but are not shown on its screen Th...

Page 12: ...her programmes and its data show in numeric and graphic format to generate reports See 4 4 The SC310 AC output is designed to pick up the direct preamplifier signal This allows you to make a calibrated recording on a D A T and subsequently analyse it both quantitatively impulse or tonal sound level analysis and qualitatively exceptional sound event shouts undesirable noises etc detection The SC310...

Page 13: ...speed rate and the RS 232 offers compatibility with all the computers and permits to generate communication ports through modem telephone mobile or Wireless See 4 2 SC310 and CAPTURE STUDIO are compatible with the Wireless technology This wireless technology makes possible the connection to CAPTURE STUDIO inside a radius of 100 m of several SC310 sound level meters simultaneously In this way sever...

Page 14: ...tra flat keyboard designed to reduce the reflections that may reach the microphone from the sound level meter case 7 Characteristics plate Showing the make model and serial number of the sound level meter along with all the standards it complies with as type 1 8 CE mark European approval mark 9 Tripod mount Built in support for tripod with standard W thread TR 40 10 WEEE mark Symbol indicating sep...

Page 15: ...SC310 User s Manual 13 ...

Page 16: ... carries out consecutive integrations of T time whether it is functioning as a sound level meter or spectrum analyser The T integration time for LT only State of measurement indication measurement completed measurement in progress flashing measurement with recording in progress measurement temporarily paused Hint Do not confuse the elapsed measuring time t with the integration time T 1 5 Using the...

Page 17: ...t the function displayed on the screen Key to select the desired sound level meter screen numerical graphic statistical or advanced Key to switch from sound level meter to 1 1 spectrum analyser Key to access the preferred numerical screen from the numerical screen only SC310 1 1 OCTAVE SPECTRUM ANALYSER KEYS Key to begin or finish a measurement a Key to temporarily interrupt a measurement PAUSE wh...

Page 18: ...ile the SC310 is in d To begin recording when SC310 is in Key to return to the previous third octave band Key to go on to the next third octave band Key to select the desired 1 3 spectrum analyser screen numerical spectrum analysis or graphic spectrum analysis Key to switch from the 1 3 spectrum analyser to the sound level meter mode ...

Page 19: ... missing get in touch with your official distributor 2 1 2 SC310 power supply Before you turn the SC310 on the first thing you must do is connect it to a battery or other power supply The SC310 sound level meter is fed by two 1 5 V alkaline or lithium batteries sized AA LR6 or by direct current 15 For DC supply use the AM240 V 230 V 50 Hz or AM241 V 110 V 60 Hz model mains feeder If both systems a...

Page 20: ...10 for some time remove the battery to prevent damage caused by battery leakage Make sure you always carry spare batteries with you since you may be measuring somewhere where it isn t easy to find new ones 2 1 3 Connecting and disconnecting the preamplifier using the extension cable the windscreen and the outdoor kit The SC310 preamplifier is completely detachable This allows you to move the pream...

Page 21: ...MPORTANT Do not attempt to detach or connect the preamplifier by unscrewing or screwing the connector 3 This will damage the sound level meter NOTE Extension cables do not have any effect inside the measuring frequency band In any case it is necessary to readjust the SC310 when using extension cables If you have purchased any of the extension cables you can use the TR001 adapter to fit the preampl...

Page 22: ...the SC310 press the key The logo together with the SC310 sound level meter model will appear on screen A few seconds later the initial screen predetermined in the menu configuration option will appear see 2 7 5 If the SC310 does not switch on check that fully charged batteries are fitted or that it is connected to a suitable power supply see 2 1 2 2 2 2 Selecting the measurement mode Once the soun...

Page 23: ...t press the key Each time you return to a mode where you have previously been the SC310 will show the screen where you last worked Next all screens of each mode are detailed SOUND LEVEL METER MODE The sound level meter mode has 4 screens SOUND LEVEL METER NUMERIC SCREEN SOUND LEVEL METER GRAPHIC SCREEN SOUND LEVEL METER STATISTICAL SCREEN SOUND LEVEL METER ADVANCED SCREEN 1 1 SPECTRUM ANALYSER MOD...

Page 24: ...22 1 3 SPECTRUM ANALYSER MODE graphic numeric 1 1 SPECTRUM ANALYSER MODE graphic numeric statistical NC SOUND LEVEL METER MODE Numeric graphic statistical advanced ...

Page 25: ...ree field to pressure corrections of the microphone at 1 kHz and those corresponding to the influence of atmospheric pressure temperature and humidity in the calibrator The free field to pressure correction for C 130 and C 250 microphones at 1 kHz is 0 1 dB That is the SC310 should be set to read 93 9dB 5 Switch the SC310 to numeric sound level meter mode 2 3 3 using the keys 6 Select the sound pr...

Page 26: ...alibrator off OFF 2 3 Measuring in sound level meter mode The sound level meter mode is suitable for measuring overall sound pressure levels both instantaneous and averaged based on integration equivalent level The SC310 simultaneously measures all the functions with all the frequency weightings A C and Z and provides statistical data of the measurements including maximum and minimum values and pe...

Page 27: ...odify the F1 F2 and F3 functions as follows Select frequency weighting A C or Z using and and press Select the acoustic function using keys and and press to confirm You may choose from the following functions o Fast F o Slow S o Impulse I o Equivalent level with programmable integration time T o Equivalent level with total integration time t o Sound exposure level E o Peak level Peak Using the key...

Page 28: ...d sound level meter either from the SC310 menu or by pressing the keys Once you have selected the screen press to set the measurement process in motion 2 3 3 Functions display The SC310 measures all functions simultaneously Described below are the different formats in which the acoustic functions are displayed while measurement is in progress If you change the kind of display the function or the f...

Page 29: ...Tmin LXt LXE LXpeak X may be any frequency weighting A C or Z By pressing you display the preferential screen again By pressing you access the graphic sound level meter mode The SC310 measures short functions 125 ms Functions but they are not shown in the screen They only can be seen by making a real time connection between the SC310 and the Capture Studio software or by making a recording with th...

Page 30: ...ing F and frequency weighting A in 0 1 dB classes By pressing you access the advanced sound level meter mode To display the total percentiles for the entire measurement you have to stop the measurement as they can only be calculated after the measurement is complete see sections 2 3 4 and 2 3 5 Advanced sound level meter screen In the advanced sound level meter screen some special acoustic functio...

Page 31: ...with frequency weighting A C and Z LCT LAT The subtraction of the equivalent continuous sound pressure level with frequency weighting C and the equivalent continuous sound pressure level with frequency weighting A corresponding to a programmable integration time T LCt LAt The subtraction of the equivalent continuous sound pressure level with frequency weighting C and the equivalent continuous soun...

Page 32: ...ands centred on frequencies 31 5 63 125 250 500 1000 2000 4000 8000 and 16000 Hz without frequency weighting and Overall values with all frequency weightings A C and Z The SC310 also measures the peak sound pressure level for the consecutive integration time T with all frequency weightings A C and Z The SC310 measures all these functions simultaneously in real time together with the short levels 1...

Page 33: ... To apply this option carry out a measurement with t integration time and calculate the time needed for the bands in which you are interested to stabilise 2 4 2 Beginning measurement First of all ensure that the sound level meter is not carrying out any measurement process If it is or press to stop it Next set the SC310 in spectrum analyser 1 1 mode and select the screen you want to view numerical...

Page 34: ...ctave band bar press left and right By pressing you access the numerical spectrum analyser 1 1 screen The SC310 measures short functions 125 ms functions although these are not displayed on the screen They may be viewed only through the software by means of real time connection with the sound level meter or by making a recording and subsequently downloading it into a PC These functions are Continu...

Page 35: ...ll sound pressure levels with frequency weightings A C and Z are values measured by the sound level meter They are never calculated by applying the discrete coefficients that these filters define to the values measured by octave band Indeed if they were thus calculated appreciable differences would be observed Frequency weighting filters are filters continuous in frequency while the use of coeffic...

Page 36: ...mation in real time The value of the NC Noise Criterion curve that does not exceed the measured spectrum In other words the value of the NC curve that defines this spectrum The value of the NC Noise Criterion curve that has not been exceeded in each octave band This information serves to ascertain which octave band fixes the value of the NC curve of the total spectrum That is at least one of these...

Page 37: ...ogrammable from 1 second to 99 hours Simultaneously and in real time the SC310 measures short levels 125 ms integration time for all bands The major applications of this mode include characterisation of soundproofing by one third octaves in an extended range of frequencies evaluation of tonal components and the detection and identification of noise sources 2 5 1 Prior adjustments Integration time ...

Page 38: ...he measurement process in motion 2 5 3 Functions display The SC310 measures all functions simultaneously Described below are the different ways of displaying the acoustic functions while measurement is in progress If you decide to change the kind of display screen or one third octave band this will not halt the measurement process While measurement is being carried out however you cannot switch fr...

Page 39: ...d 10000 Hz without frequency weighting Numerical spectrum analyser 1 3 screen This screen displays the following information in real time Continuous equivalent sound pressure level with integration time T for the one third octave bands centred on frequencies 20 25 31 5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 and 10000 Hz without frequen...

Page 40: ...ts corresponding measurement will be incorrect When overloading occurs the indication will appear in the bottom right hand corner of the screen 2 7 SC310 menu Register and setting management This section describes all options accessible from the SC310 menu a major one of which is memory management and SC310 settings screens language date and time etc When supplied the SC310 is programmed with an i...

Page 41: ...ts of all the functions measured in the memory The SC310 indicates the register number in which the data has been recorded For further information see section 3 1 MEMORY This option allows you to manage the SC310 memory o MEMORY Î VIEW REGISTER This allows you to view the registers recorded in the sound level meter For further information see section 3 4 o MEMORY Î ERASE MEMORY This option allows ...

Page 42: ... to set the periodicity and functions to be stored by the SC310 when a recording is made SETTINGS Î RECORDING Î CIRCULAR MEMORY This allows you to select the circular memory option described in section 3 3 4 Through this option the SC310 will use its free memory space as a circular buffer In other words as this space fills the SC310 will continue to store data while deleting the oldest data stored...

Page 43: ...erical spectrum analyser screen per one third octave band GRAPHIC RTA 1 3 sets the graphic spectrum analyser screen per one third octave band o SETTINGS Î SENSITIVITY ADJUSTMENT This option allows you to adjust the sensitivity of the S310 For further information see section 2 2 3 verification of the SC310 o SETTINGS Î AC OUTPUT The alternating current output of the SC310 is directly proportional t...

Page 44: ...sation on the microphone Remove the microphone s protective mesh only when strictly necessary Never touch the diaphragm If the diaphragm is very dirty carefully remove the dust using a fine camel s hair brush If the SC310 receives any knocks or blows these are detected by the microphone and may alter the value of the measurement It is advisable to isolate the SC310 from vibrations Pads of foam rub...

Page 45: ...ompartment see photo and either replace it with a new one or contact your official dealer This equipment only can work with the accessories mentioned in the accessories section In case that using a different accessories and that this causes a failure in the equipment would not be responsible of this failure Then the equipment will lose its warranty 2 10 Advice for carrying out measurements To avoi...

Page 46: ...ound level meter must be took into account for the measurement of low sound levels In order to measure sound levels lower than those specified by the lower limit range the self generated noise from the sound level meter must be took into account ...

Page 47: ...ivalent sound pressure level with integration time T And their maximum and minimum values o Continuous equivalent sound pressure level of the entire measurement o The sound exposure level S E L o The sound pressure peak level o Continuous equivalent sound pressure level with impulse frequency weighting and integration time T for the entire measurement All measured with frequency weightings A C and...

Page 48: ...s and periodicity are specified for each mode in the recording setting The main difference between the different kinds of recording lies in the number of functions storing time compromise See section 3 3 Before beginning a recording make sure there are no measurements in progress To begin a recording press The screen will display the kind of recording together with the register number Next the fun...

Page 49: ... with frequency weightings A C and Z 1s 125ms functions save all the 1s and 125 ms short functions These 3 types of recording are conceived for short duration measurements F1 each second saves the main function programmed on the preferential screen second by second F1 F2 and F3 each second saves the 3 functions programmed on the preferential screen second by second LT LIT and percentiles every T e...

Page 50: ... Recording in spectrum analyser 1 1 mode may be set through the SETTINGS Î RECORDING Î RTA RECORDING option in which by means of the following options you may set the periodicity and functions to be stored in the memory T functions once each integration time T has come to an end the following values are stored in the memory o LT for each of the octave bands centred on frequencies 31 5 63 125 250 5...

Page 51: ...is ideal for when no statistical information need be stored In this way longer storage times are attained The following table shows the storage capacity for the different kinds of recordings in spectrum analyser 1 1 mode Type of recording Storage capacity T functions T 1 s Î 4 days 3 hours T 1 min Î 8 months 9 days T 1 hour Î 41 years 6 months 125ms functions 3 days T 125ms functions T 1 s Î 1 day...

Page 52: ...0 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 and 10000 Hz This kind of recording coincides with T functions The following table shows the storage capacity of the different types of spectrum analyser 1 3 mode recordings Type of recording Storage capacity T functions and LT each T T 1 s Î 13 days 15 hours T 1 min Î 2 years 3 months 125 ms functions 1 day 17...

Page 53: ...ory register number date and time when the measurement process began To view the different functions follow the procedure described in sections 2 3 5 2 4 5 and 2 5 5 Information for the graphic sound meter mode screen is not available 3 5 Erasing the memory This option allows you to sweep the memory completely clean Prior to your doing this the SC310 will request confirmation MEMORY Î ERASE MEMORY...

Page 54: ...310 to the D A T recorder 2 Adjust the input gain of the D A T recorder and the output gain of the AC output see section 2 7 5 to adapt the margin of the measured signal to that of the D A T recording 3 Begin the recording process 4 Record a calibration signal We recommend you use the CB 5 calibrator It is sufficient to record the 1 kHz and 94 dB tone generated by the calibrator 5 Begin measuremen...

Page 55: ...fer by phone simply by using the adapter for MA101 modem you may connect a modem line or cellular to the RS 232 port which enables you to make remote connections from a PC connected to the telephone network Tele transfer of data Transfer via radio frequency link you need only acquire the BT001 cordless communication kit which will convert the RS 232 port into a communications port with wireless te...

Page 56: ...u must be activated While it is activated it will not be possible to carry out serial communication with a PC When you switch the S310 off the PRINTING option is automatically deactivated 4 3 USB communications port The USB communications port transfers data at high speed It is therefore ideal for downloading large volumes of data stored by the SC310 4 4 Data transfer to a PC communication softwar...

Page 57: ... is being recorded In other words while data is being recorded it may also be downloaded This feature together with the memory setting as a circular buffer places a limitless memory at your disposal All you need do is periodically download data before the memory reaches its maximum capacity To carry out these options you must insert a communications port either an RS 232 or a USB between the SC310...

Page 58: ...er limit Linear operating range at 31 5 Hz Upper limit Lower limit Linear operating range at 4 kHz Upper limit Lower limit Linear operating range at 8 kHz Upper limit Lower limit Linear operating range at 12 5 Hz Upper limit Lower limit Electrical Noise replacing the microphone by its nominal impedance short circuited to ground Maximum Typical Total Noise at 20ºC electrical thermic of microphone M...

Page 59: ...pedance short circuited to ground Maximum Typical Total Noise at 20ºC electrical thermic of microphone Maximum Typical 120 0 28 2 137 0 130 0 126 0 120 0 22 0 97 6 24 5 138 0 24 5 135 9 24 5 132 7 22 0 9 4 8 6 16 6 15 7 120 0 28 6 137 0 130 0 126 0 120 0 22 0 134 0 26 0 136 2 26 0 134 0 26 0 130 8 22 0 10 5 8 8 16 8 15 1 120 0 34 0 137 0 130 0 126 0 120 0 27 0 137 0 31 0 137 0 31 0 137 0 31 0 137 ...

Page 60: ...est factor 3 0 5 dB Maximum error for signals with crest factor 5 1 0 dB Maximum error for signals with crest factor 10 1 5 dB Maximum overshot LF LS 1 1 dB 1 6 dB Maximum error of level linearity 31 5 to 12500 Hz 0 7 dB Maximum error of differential level linearity 31 5 to 12500 Hz 0 2 dB Peak detector LI function Decay rate 2 9 dB s 0 5 dB s Onset time constant 3 5 ms 5 3 Peak detector Lpeak fun...

Page 61: ...ble Function Weighting Lpeak A C or Z LF A C or Z LS A C or Z LI A C or Z LE A C or Z LT A C or Z Lt A C or Z Lx percentiles A The following table shows the A and C frequency weightings and tolerance for type 1 Frequency Hz Weighting A dB Weighting C dB Tolerance for type 1 dB 16 56 7 8 5 3 31 5 39 4 3 0 1 5 63 26 2 0 8 1 5 125 16 1 0 2 1 250 8 6 0 0 1 500 3 2 0 0 1 1 000 0 0 1 2 000 1 2 0 2 1 4 0...

Page 62: ...ginal CESVA accessories are used Any damage caused to the equipment due to the use of non original CESVA accessories will not be covered by the equipment warranty 3 5mm 5 8 Octave band filters Frequency evaluation system Base 10 Reference attenuation 0 dB Operative linearity range same as the measurement range Octave band nominal central frequencies Nominal central frequency Exact base 10 frequenc...

Page 63: ...with nominal central frequency Lower than 8 kHz Upper limit Lower limit Higher than 8 kHz Upper limit Lower limit The noise electrical thermic of the microphone is as a minimum 10 dB lower than the lower limit of the measurement range 137 dB 18 dB 137 dB 20 dB 5 10 Third octave band filters Frequency evaluation system Base 10 Reference attenuation 0 dB Operative linearity range same as the measure...

Page 64: ...nal central frequency Lower than 20 Hz Upper limit Lower limit Higher than 20 Hz Upper limit Lower limit The noise electrical thermic of the microphone is as a minimum 10 dB lower than the lower limit of the measurement range 137 dB 25 dB 137 dB 20 dB For C 250 PA 14 Measurement range with linearity error lower than 0 4 dB One third octave bands with nominal central frequency Lower than 31 5 Hz Up...

Page 65: ...Hz 0 09 5000 Hz 5011 87 Hz 0 28 160 Hz 158 49 Hz 0 09 5600 Hz 5623 41 Hz 0 04 200 Hz 199 53 Hz 0 09 6300 Hz 6309 57 Hz 0 08 250 Hz 251 19 Hz 0 08 7100 Hz 7079 46 Hz 0 10 315 Hz 316 23 Hz 0 06 8000 Hz 7943 28 Hz 0 16 400 Hz 398 11 Hz 0 05 8400 Hz 8413 95 Hz 0 08 500 Hz 501 19 Hz 0 06 9000 Hz 8912 51 Hz 0 10 630 Hz 630 96 Hz 0 00 9400 Hz 9440 61 Hz 0 08 800 Hz 794 33 Hz 0 17 10000 Hz 10000 00 Hz 0 0...

Page 66: ...itance 17 0 pF Nominal sensitivity 46 4 mV Pa in reference conditions Constant pressure to free field correction C 250 Frequency Hz Correction dB Frequency Hz Correction dB 125 0 0 2 000 0 4 250 0 0 4 000 1 2 500 0 0 8 000 3 4 1 000 0 1 5 13 Diffuse field sensitivity S C130 microphone Frequency Hz S mV Pa 2 000 26 44 3 000 17 35 4 000 20 61 12 500 12 05 ...

Page 67: ... 20 0 19 0 18 0 17 0 16 0 15 0 14 0 13 0 12 0 11 0 10 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 0º 10º20º 30º 40º 50º 60º 70º 80º 90º 100º 110º 120º 130º 140º 150º 180º 210º 220º 230º 240º 250º 260º 270º 280º 290º 300º 310º 320º 330º 340º 350º 4000 20 0 19 0 18 0 17 0 16 0 15 0 14 0 13 0 12 0 11 0 10 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 0º 10º20º 30º 40º 50º 60º 70º 80º 90º 100º 110º 120º 130...

Page 68: ... 2 0 1 0 0 0 0º 10º20º 30º 40º 50º 60º 70º 80º 90º 100º 110º 120º 130º 140º 150º 180º 210º 220º 230º 240º 250º 260º 270º 280º 290º 300º 310º 320º 330º 340º 350º 4000 20 0 19 0 18 0 17 0 16 0 15 0 14 0 13 0 12 0 11 0 10 0 9 0 8 0 7 0 6 0 5 0 4 0 3 0 2 0 1 0 0 0 0º 10º 20º 30º 40º 50º 60º 70º 80º 90º 100º 110º 120º 130º 140º 150º 180º 210º 220º 230º 240º 250º 260º 270º 280º 290º 300º 310º 320º 330º ...

Page 69: ...fect of the TK 1000 rain cover 5 4 3 2 1 0 1 2 3 4 5 1000 1995 3981 7943 15849 Effect of the TK 1000 Effect of the extension cables The extension cables do not influence into the measuring frequency band A recalibration is not necessary when using the extension cables Tripod adaptor effects The influence in the frequency response and directivity of the TR 001 tripod adaptor is negligible ...

Page 70: ...17 Warm up time Warm up time 30 seconds 5 18 Temperature influence Operation range 10 to 50 C Maximum error 10 to 50 C 0 5 dB Storage without batteries 20 to 60 C 5 19 Humidity influence Operation range 30 to 90 Maximum error at 30 R H 90 at 40 C and 1 kHz 0 5 dB Storage without batteries 93 5 20 Electromagnetic compatibility Classification group X Influence of the Magnetic Fields In a magnetic fi...

Page 71: ...degradation or loss of function after being exposed to electrostatic discharges 5 21 Vibration influence For frequencies from 20 to 1 000 Hz and 1 m s 75 dB A 5 22 Batteries External supply Battery Two AA sized LR6 1 5 V batteries Typical battery life with continuous use Sound Level Meter Spectrum Analyser 1 1 Spectrum Analyser 1 3 The typical battery life with the display lighted can be reduced a...

Page 72: ...4 00 type 1 EN 61260 95 A1 01 type 1 IEC 61672 IEC 60651 01 type 1 IEC 60804 00 type1 IEC 61260 95 A1 01 type1 ANSI S1 4 83 R2001 type 1 ANSI S1 43 97 R2002 type 1 ANSI S1 11 04 type 1 mark Complies with 73 23 CEE and CEM 89 336 CEE low tension regulations the latter amended by 93 68 CEE instruments as an electric or electronic equipment manufacturer informs you that the product you have purchased...

Page 73: ...le for connection to a PC USB USB CN1US Transport briefcase ML 50 and ML 10 2x 1 5 V batteries Mains feeder V 230 50 Hz AM240 Mains feeder V 110 60 Hz AM241 Outdoor kit TK1000 Microphone extension cable 3 m CN 003 Microphone extension cable 10 m CN 010 Microphone extension cable 30 m CN 030 Tripod adaptor TR001 DC converter regulator for external battery car battery AM140 AC output audio cable CN1...

Page 74: ... Z LZt A LAE C LCE Sound exposure level S E L Z LZE A LApeak C LCpeak Sound pressure peak level Z LZpeak A LAIT C LCIT Equivalent continuous sound pressure level with time weighting I and integration time T Z LZIT A LAIt C LCIt Equivalent continuous sound pressure level of the entire measurement with time weighting I Z LZIt A LAIT LAT C LCIT LCT Dynamic subtraction of the equivalent continuous sou...

Page 75: ...X Percentile 5 L5 A X X X X X X X X X X Percentile 10 L10 A X X X X X X X X X X Percentile 50 L50 A X X X X X X X X X X Percentile 90 L90 A X X X X X X X X X X Percentile 95 L95 A X X X X X X X X X X Percentile 99 L99 A X X X X X X X X X X X available without frequency weighting unavailable 6 1 3 1 3 Spectrum analyser mode functions Function Name TOTAL 20 25 31 5 40 50 63 80 100 125 160 200 Equiva...

Page 76: ...oise while S response is recommended for noises that very more o 2 1 T t 2 F S p d e p 1 log 0 2 L ζ ζ τ τ ζ p t instantaneous sound pressure p0 reference sound pressure 20 µPa 6 2 2 Sound pressure level with I time weighting LI Impulse Maximum short term RMS value with exponential averaging of 35 ms in decibels p t instantaneous sound pressure The I characteristic is designed to detect impulse no...

Page 77: ...ts that due to their long duration cover a wide range of sound pressure levels such as environmental measurements Percentile levels are the perfect complement to the equivalent continuous sound pressure level function The SC310 measures the equivalent continuous sound pressure levels Lt and LT The Lt equivalent level is the equivalent level of the interval measured that is for each instant it give...

Page 78: ...L5 and L1 These are the levels that were exceeded during 99 95 90 50 10 5 and 1 of the analysis time in decibels In Sound Level Meter mode they are calculated with classes of 0 1 dB using the function LAF In the 1 1 spectrum analyser mode they are calculated with classes of 0 5 dB and using the function LAT In some English speaking countries the percentile levels are known as the exceedence levels...

Page 79: ...module and it can be acquired when buying the SC310 or later To incorporate it you just have to contact your official distributor and supply him the serial number of your sound level meter In a few days you will receive a CD with the activation program 7 1 Activation of the Reverberation Time Module To activate the reverberation time module RT Insert in the CD ROM drive the CD that you have receiv...

Page 80: ...ned in the menu configuration option will appear If the SC310 does not switch on check that a fully charged battery is fitted or that it is connected to a suitable power supply 7 3 2 Access to the Reverberation Time Mode 1 1 Switch on the SC310 and check there is no measurement in progress sequencially press the key until appears REVERBERATION TIME 1 1 Then will appear in the screen the Reverberat...

Page 81: ...ining the sound pressure level decay according to time inside the room that it is being studied This decay is obtained exciting the room with random noise of broadband or of limited bandwidth and recording the decay level of the sound pressure when making a sudden interruption of the noise emission To do this measurement you will need an omni directional sound pressure source FPA 120 to emit a bro...

Page 82: ... pressure level until you obtain a sound pressure level of 35 dB upper to the background noise for calculating the T20 and 45 dB upper to the background noise for calculating the T30 When the source is emitting the necessary sound pressure level you should wait some seconds to make the acoustic field reach the stationary state Press to validate this level You will see that these values will stop o...

Page 83: ...ss it can be stopped by pressing The state of measurement indicator will switch from to 7 4 4 Overload indicator The SC310 has an overload indicator If during the measurement an overload has occurred it will appear the sign before the value of the function affected While there is an overload the sign will appear in the bottom right hand corner of the screen If during the measurement the sign appea...

Page 84: ...d exciting the room with random noise of broadband or of limited bandwidth and recording the decay level of the sound pressure when making a sudden interruption of the noise emission To do this measurement you will need an omni directional sound pressure source FPA 120 to emit a broadband noise pink noise From among the applications of this mode you should point up the measurement of the reverbera...

Page 85: ...alues will stop oscillating These values will be taken as the background noise level to calculate the RT At the screen it will appear a new column of values that concern to the increase of the sound pressure level respect the background noise in dB Increase progressively the sound pressure level until you obtain a sound pressure level of 35 dB upper to the background noise for calculating the T20 ...

Page 86: ...reen The SC 30 also measures the decay curves of the sound pressure level but this only can be displayed by recording the final result of the measurement and downloading these data to the computer through the CAPTURE Studio software application At the next graphic you can see all the Reverberation Time measurement process 7 5 4 Stopping the measurement While the measurement is in progress it can b...

Page 87: ...es of the measured functions may be stored in the SC310 internal memory When the unit is switched off the data is saved and may be retrieved and displayed directly from the SC310 or transferred to a PC The memory may be erased directly from the SC310 7 6 1 Saving results Once a measurement has been completed the results may be stored in the memory Do this by selecting the SAVE RESULTS option from ...

Page 88: ...e final results of the registers stored in the SC310 memory To use this option access VIEW REGISTER on the SC310 menu The SC310 allows you to select using the keys and the register you want to display and an index will appear on screen showing all the registers stored in the memory register number date and time of the beginning of the measurement process Information on the decay curve is not avail...

Page 89: ...Hz 20 ms 125 Hz 125 Hz 20 ms 160 Hz 20 ms 200 Hz 10 ms 250 Hz 250 Hz 10 ms 315 Hz 10 ms 400 Hz 10 ms 500 Hz 500 Hz 10 ms 630 Hz 10 ms 800 Hz 10 ms 1 kHz 1 kHz 10 ms 1 25 kHz 10 ms 1 6 kHz 10 ms 2 kHz 2 kHz 10 ms 2 5 kHz 10 ms 3 15 kHz 10 ms 4 kHz 4 kHz 10 ms 5 kHz 10 ms The range of measurement for the T20 and T30 functions is T20 1 1 octave band 1 3 octave band T20 50 Hz 0 28 s a 17 1 s 63 Hz 63 ...

Page 90: ...a 17 1 s 5 kHz 0 07 s a 17 1 s T30 1 1 octave band 1 3 octave band T30 50 Hz 0 28 s a 11 4 s 63 Hz 63 Hz 0 28 s a 11 4 s 80 Hz 0 28 s a 11 4 s 100 Hz 0 14 s a 11 4 s 125 Hz 125 Hz 0 14 s a 11 4 s 160 Hz 0 14 s a 11 4 s 200 Hz 0 07 s a 11 4 s 250 Hz 250 Hz 0 07 s a 11 4 s 315 Hz 0 07 s a 11 4 s 400 Hz 0 07 s a 11 4 s 500 Hz 500 Hz 0 07 s a 11 4 s 630 Hz 0 07 s a 11 4 s 800 Hz 0 07 s a 11 4 s 1 kHz ...

Page 91: ...y least square approximation of itself 7 7 3 Standards of measurement and calculation You can make measurements and calculations according the next standards Standards of measurement and calculation ISO 3382 Measurement of the reverberation time of rooms ISO 354 Measurement of sound absorption in a reverberation room ISO 140 Measurement of sound insulation in buildings and of building elements ...

Page 92: ...he decay curve X X X X X X X X X X X X Function 1k 1k25 1k6 2k 2k5 3k15 4k 5k Reverberation TimeT30 X X X X X X X X Reverberation Time T20 X X X X X X X X Sound pressure level of the background noise X X X X X X X X Initial maximum sound pressure level X X X X X X X X Time history of the decay curve X X X X X X X X X available without freq weighing All the functions are measured simultaneously 7 9...

Page 93: ...l a level 25 dB lower than the initial one The reverberation time of a room is one of the most important parameters to evaluate its acoustics properties Its measurement has important applications on the field of noise control in rooms Concert halls and Lecture rooms The reverberation time measurement is essential for calculation of the acoustic insulation in buildings and of building elements and ...

Page 94: ...f the SC310 sound level meter carries out a frequency analysis with constant bandwidth filters covering the frequency range from 0 Hz to 20 kHz in real time and in all dynamic measurement range no scale settings The FFT analysis has 430 effective lines with a resolution of 47 Hz The SC310 measures the equivalent continuous sound pressure level with a programmable integrating time from 1 second to ...

Page 95: ...ed spectrum analyser screen numerical spectrum analysis graphic spectrum analysis or spectrum analysis of advanced acoustic parameters Key to change mode when SC310 is in 8 3 Using the keyboard for the FFT Narrow Band Frequency Analyser Mode SC310 KEYS FFT NARROW BAND FREQUENCY ANALYSER MODE Key to begin or terminate a measurement c Key to temporarily interrupt a measurement PAUSE while the SC310 ...

Page 96: ...is no measurement in progress sequentially press the key until appears SPECTRUM ANALYSER 1 3 Next the extended Spectrum Analyser 1 3 screen will appear 8 4 3 Access to the FFT Narrow Band Frequency Analyser Switch on the SC310 and check there is no measurement in progress sequentially press the key until appears FFT S Next the FFT narrow band frequency analysis will appear Also an identification a...

Page 97: ...this parameter select the SETTINGS Î MEASURING Î SPECTRUM ANALYSER option from the SC310 menu Press the key to begin setting the T parameter and then follow the procedure below Select your numerical value using and and confirm by pressing Integration time T may be set from o 1 to 59 seconds 1 59 o 1 to 59 minutes 1 59 o 1 to 99 hours 1H 99 H Finally select the time units seconds minutes or hours H...

Page 98: ...l time Graph of the continuous equivalent sound pressure levels with integration time T bars in real time for one third octave bands centred on the frequencies 10 12 5 16 20 25 31 5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 12500 16000 and 20000 Hz without frequency weighting Numerical value of the continuous equivalent sound pressu...

Page 99: ...splays the following information in real time Continuous equivalent sound pressure level with integration time T for the one third octave bands centred on frequencies 10 12 5 16 20 25 31 5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 12500 16000 and 20000 Hz without frequency weighting Overall continuous equivalent sound pressure level...

Page 100: ... of the maximum sound pressure level with time averaging F and the equivalent continuous sound pressure level corresponding to the programmable integration time T Both values with frequency weighting A The subtraction of the maximum sound pressure level with time averaging I and the maximum sound pressure level with time averaging F corresponding to the programmable integration time T Both values ...

Page 101: ...s a zoom tool of x1 x2 5 and x5 8 6 1 Prior adjustments Integration time Before beginning a measurement in spectrum analyser mode the following parameters should be set Integration time T used in the evaluation of spectral and overall levels This integration is carried out in consecutive intervals of T time To set this parameter select the SETTINGS Î MEASURING Î SPECTRUM ANALYSER option from the S...

Page 102: ...unctions while measurement is in progress If you choose to change the kind of display screen or FFT line this will not stop the measurement process While measurement is being carried out you cannot switch from one measurement mode to another When the frequency range of display changes then the cursor is placed at the central point of the screen Graphic FFT narrow band frequency analysis zoom x1 Th...

Page 103: ... levels with integration time T bars in real time Numerical value of the continuous equivalent sound pressure level with integration time T for the chosen FFT line bar without frequency weighting Frequency of the chosen FFT line bar To change the chosen FFT line bar press left and right By pressing you access the FFT narrow band frequency analysis with an interval of display x5 Graphic FFT narrow ...

Page 104: ...asuring you may consult all the measured functions To consult them apply the same procedure as described in the section 8 6 3 on viewing data while measurement is in progress 8 6 6 Overload indicator The SC310 is equipped with an overload indicator for each function If overloading occurs during measurement the sign will appear before the function affected by overloading When a function registers o...

Page 105: ...imum sound pressure level with time averaging I and frequency weighting A o The maximum sound pressure level with time averaging S and frequency weighting A o Integration time T o Date and time of the beginning of measurement The SC310 may store a total of 1000 final results FFT narrow band frequency analyser mode o Continuous equivalent sound pressure level with integration time T without frequen...

Page 106: ...red on frequencies 10 12 5 16 20 25 31 5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 12500 16000 and 20000 Hz o Overall LT with frequency weighting A C and Z o Overall LAIT LAFmax LAImax and LASmax This type of recording is conceived for long duration measurements such as studies of environmental noise and traffic noise which require ...

Page 107: ...hours The storage times for each type of recording correspond to one single recording until the memory is completely full The SC310 has enought capacity for up to 1000 registers final results or recordings of whatever type When the built in memory is full no more recordings may be made and no more final results saved If you attempt to do this the MEMORY FULL message will appear on screen If the me...

Page 108: ...ns unaffected This means that as from this moment onwards when you begin a recording the SC310 will save data until its memory is full When this moment comes it will continue to save data though deleting the oldest data stored in the memory space prior to beginning the recording This space will always contain the latest data measured This feature together with the opportunity to download data whil...

Page 109: ...quency 10 Hz 10 00 Hz 500 Hz 501 19 Hz 12 5 Hz 12 59 Hz 630 Hz 630 96 Hz 16 Hz 15 85 Hz 800 Hz 794 33 Hz 20 Hz 19 95 Hz 1000 Hz 1000 00 Hz 25 Hz 25 12 Hz 1250 Hz 1258 93 Hz 31 5 Hz 31 62 Hz 1600 Hz 1584 89 Hz 40 Hz 39 81 Hz 2000 Hz 1995 26 Hz 50 Hz 50 12 Hz 2500 Hz 2511 89 Hz 63 Hz 63 10 Hz 3150 Hz 3162 28 Hz 80 Hz 79 43 Hz 4000 Hz 3981 07 Hz 100 Hz 100 00 Hz 5000 Hz 5011 87 Hz 125 Hz 125 89 Hz 63...

Page 110: ...rement range 137 dB 39 dB 137 dB 28 dB 137 dB 20 dB 137 dB 24 dB For C 250 PA 14 Measurement range with linearity error lower than 0 4 dB One third octave bands with nominal central frequency From 10 Hz to 16 Hz Upper limit Lower limit From 20 Hz to 25 Hz Upper limit Lower limit From 31 5 Hz to 40 Hz Upper limit Lower limit From 50 Hz to 8 kHz Upper limit Lower limit Higher than 8 kHz Upper limit ...

Page 111: ...aneously Function Freq Weigh Name Equivalent continuous sound pressure level with time averaging I and integration time T A LAT Maximum sound pressure level with time averaging F A LAFmax Maximum sound pressure level with time averaging I A LAImax Maximum sound pressure level with time averaging S A LASmax The subtraction of the equivalent continuous sound pressure level with time averaging I and ...

Page 112: ...arrow band frequency analyser Time window Hanning No of lines Analysis Resolution 430 46 5 Hz Frequency range displayed on the screen Zoom x1 Æ 20 kHz Zoom x2 5 Æ 8 kHz Zoom x5 Æ 4 kHz Dynamic measurement range 80 dB ...

Page 113: ...ker the SC310 beside measuring the equivalent level with frequency weighting A and C LAt LCt SNR and HML method simultaneously carries out a real time frequency analysis with frequency weighting A and by octave bands from 63 Hz to 8 kHz Octave method The huge memory of the SC310 allows you to store the time history of the measured parameters time periods longer than a week and afterwards recalcula...

Page 114: ...ement PAUSE while the SC310 is in b To start recording data into memory when SC310 is stopped i e Key to return to the previous octave band Key to go on to the next octave band or select between the numerical screen and the numerical screen with projected parameters Key to select the desired Dosimeter mode screen Numerical screen 1 1 Spectrum analyser screen and graphic screen Key to change mode w...

Page 115: ...the noise dose DOSE all parameters with frequency weighting A Also the dosimeter mode can project these parameters to the predicted exposure time for measurement times shorter than the exposure time Also the dosimeter mode measures the equivalent continuous sound pressure level with frequency weighting A and C LAt and LCt and the peak sound pressure level with frequency weighting C LCpeak The freq...

Page 116: ...confirm repeat this process to set the minutes value The projection time tp is set from HH mm 00 o 0 to 99 for HH Hours o 0 to 59 for mm minutes The minimum projection time is 1 minute To modify the T parameter follow the next steps Select the numerical value using and and confirm by pressing T integration time may be set from o 1 to 59 seconds 1 59 o 1 to 59 minutes 1 59 o 1 to 99 hours 1H 99 H F...

Page 117: ...om one measurement mode to another Numerical screen This screen shows in real time the next information Daily noise exposure level LEX 8h Sound Exposure E Noise dose DOSE Equivalent continuous sound pressure level with frequency weighting A and C corresponding to the measurement time Peak sound pressure level with frequency weighting C corresponding to the measurement time Criterion level LC Measu...

Page 118: ... time the next information Graph of the equivalent continuous sound pressure level with the integration time corresponding to the measurement time bars in real time for octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz with frequency weighting A Numerical value of the equivalent continuous sound pressure level with the integration time equal to the measurement time for ...

Page 119: ...easurement is in progress 9 4 6 Overload indicator The SC310 is equipped with an overload indicator for each function If overloading occurs during measurement the sign will appear before the function affected by overloading When a function registers overload its corresponding measurement is incorrect When overloading occurs the indication appears at the right bottom corner of the screen 9 5 Data r...

Page 120: ...SE DOSEp LEX 8h p E and Ep functions are not saved Every time that a register is recovered these functions are calculated according LC and tp values set on the sound level meter The SC310 has enough capacity for up to 1000 final results 9 5 2 Making a recording A recording consists of making a measurement and storing a series of functions with a certain periodicity in the memory These functions an...

Page 121: ...vel with the integration time corresponding to the measurement time with frequency weighting A for each one of the octave bands centred on frequencies 63 125 250 500 1000 2000 4000 and 8000 Hz Overall peak sound pressure level with frequency weighting C corresponding to the measurement time LCpeak Daily noise exposure level LEX 8h p Equivalent continuous sound pressure level with frequency weighti...

Page 122: ...ULAR MEMORY option from the menu the empty memory space will be configured as a circular buffer while the already occupied memory space remains unaffected This means that as from this moment onwards when you begin a recording the SC310 will save data until its memory is full When this moment comes it will continue to save data though deleting the oldest data stored in the memory space prior to beg...

Page 123: ...sure level normalized to 8 hours with frequency weighting A lg 10 0 8 T t L L At h EX LAt Equivalent continuous sound pressure level with frequency weighting A corresponding to the measurement time t Measurement time T0 Normalization time 8 Hours 9 9 2 Sound exposure E Sound exposure time integral of the instantaneous squared sound pressure over a specified measurement time expressed in Pa2 h dt t...

Page 124: ...easurement range no scale settings The FFT analysis has 430 effective lines with a resolution of 2 5 Hz The SC310 measures the average acceleration level RMS with a programmable integrating time from 1 second to 99 hours without frequency weight dB referred to 10 6 m s2 from 1 second to 99 hours without frequency weighting for each FFT line Vibration is a complex physical phenomenon both in freque...

Page 125: ...he SC310 and press key sequentially until appears the new modes It can be identify by the VIBRATION name Human exposure to whole body vibration in buildings mode and FFT V FFT narrow band frequency analysis for vibration 10 1 3 PA001 Preamplifier and the Accelerometer connection In order to make a measurement of acceleration the accelerometer must be connected to the SC310 This must be done throug...

Page 126: ...from the accelerometer until this gets fixed 10 1 4 If you want to connect a different accelerometer If you want to connect an accelerometer different to a accelerometers this should be an ICP type Integrated Circuit Piezoelectric Connect the accelerometer to the PA001 preamplifier as it is indicated in the section 10 1 3 The supply is done through a constant current supply of 1 8 mA with a voltag...

Page 127: ... on the screen Key to choose the desired screen in the Vibration mode Graphic Spectrum Analyser 1 3 K or Numeric Spectrum Analyser 1 3 or Numeric overall Analyser with Wm weighting Key to change mode when the SC310 is in 10 3 Using the keyboard for the FFT narrow band frequency analysis SC310 Keys FFT VIBRATION mode Key to begin and to finish a measurement e Key to temporarily interrupt a measurem...

Page 128: ...ON Next will appear the vibration mode on the screen This mode can be identified by the indication that will appear at the right upper part from the screen 10 4 3 Accessing to the FFT narrow band frequency analysis mode Turn on the SC310 and check there is no measurement running press sequentially the key until appears the title FFT V Next will appear the FFT narrow band frequency analysis vibrati...

Page 129: ...n buildings and FFT narrow band frequency analysis for vibration This way allows you not to loose the microphone sensitivity adjustment Then selecting the option SETTINGS Î SENSITIVITY ADJUSTMENTS from the SC310 menu the next screen will appear To adjust the microphone sensitivity choose the MICROPHONE option To adjust the accelerometer sensitivity choose the ACCELEROMETER option If you have acqui...

Page 130: ...e SC310 menu 6 The acceleration level measured by the SC310 will appear on the screen this acceleration level is measured without frequency weighting 7 Verify that the reading value is 140 dB corresponding to the nominal acceleration value The calibrator s tolerance is 3 this means that the correct verification interval value is from 139 7 dB to 140 3 dB If the value is out of the specified interv...

Page 131: ...n it comes to evaluating ideal evaluation time To apply the option make a measurement with evaluation time t and calculate the time needed for the bands in which you are interested to stabilise 10 5 3 Beginning measurement First of all be sure that the sensitivity from the accelerometer see 10 5 1 and the evaluation time T see 10 5 2 have been adjust correctly Then ensure that the sound level mete...

Page 132: ...ithout frequency weighting expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 Central frequency of one third octave band selected bar Multiplying factor K according to the old ISO 2631 2 1989 To change the chosen one third octave band bar press left and right By pressing you access to the Numeric Spectrum analyser 1 3 screen The SC310 measures short functions Functions 125 ...

Page 133: ...luation time T expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 Peak acceleration PEAK with frequency weighting Wm and evaluation time T expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 Crest factor CF quotient between the peak acceleration and the RMS acceleration Expressed in linear and logarithmic in dB format MTVV Maximum Transient Vibration ...

Page 134: ...o the temporary interruption of measurement To resume measurement press By pressing you stop the measurement The state of measurement indicator will change from to 10 5 6 Consulting measured data While the SC310 is not measuring you may consult all the measured functions To consult them apply the same procedure as described in the section 10 5 4 on viewing data while measurement is in progress 10 ...

Page 135: ... adjusts This already comes adjusted with the adquired accelerometer If you have adquired the module after buying the SC310 and you are using a accelerometer follow the next steps to adjust the sensitivity from the accelerometer 1 Select the option SETTINGS Î SENSITIVITY ADJUSTMENTS Î ACCELEROMETER from the SC310 menu 2 It appears the next screen 3 Select the model of the accelerometer In this way...

Page 136: ... adjust the measured value to the one generated by the calibrator 9 Validate with or press to go back to the SC310 menu without give effect to the sensitivity If you are using a different accelerometer to a accelerometer you do not have an acceleration calibration and your accelerometer has a sensitivity of 100 mV g 500 mV g or 1000 mV g Select the option SETTINGS Î SENSITIVITY ADJUSTMENTS Î ACCEL...

Page 137: ...that the sensitivity from the accelerometer see 10 6 1 and the evaluation time T see 10 6 2 have been adjust correctly Then ensure that the sound level meter has no measuring process in progress If it has or press to stop it Next set the SC310 in FFT narrow band frequency analysis for vibration and choose the screen you want to display with the following keys Once you have selected your screen pre...

Page 138: ...requency of the chosen FFT line bar To change the chosen FFT line bar press left and right By pressing you access the FFT narrow band frequency analysis with an interval of visualization x 2 5 FFT Narrow band frequency analysis screen zoom x2 5 This screen shows in real time the next information The displayed frequency range appearing on the screen is 400 Hz The major value of the line from each g...

Page 139: ...ation time T for the chosen FFT line bar without frequency weighting expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 Frequency of the chosen FFT line bar To change the chosen FFT line bar press left and right By pressing you access the FFT narrow band frequency analysis with an interval of visualization x1 10 6 5 Interrupting the measurement By pressing you temporarily i...

Page 140: ...electing the SAVE RESULTS option from the main menu The SC310 will indicate the register number in which to record the data The SC310 stores the following information Vibration mode o Average acceleration RMS with evaluation time T for one third octave band centred in the frequencies 1 1 25 1 6 2 2 5 3 15 4 5 6 3 8 10 12 5 16 20 25 31 5 40 50 63 and 80 Hz without frequency weighting expressed in m...

Page 141: ...ill display the message TIME SYNCHRONISATION and will wait until the built in clock reaches the o clock time to begin displaying and saving data 10 7 4 Kinds of recording 10 7 4 1 Recording in Vibration mode Through the SETTINGS Î RECORDING Î RTA RECORDING option in which by means of the following options you may set the periodicity and functions to be stored in the memory T functions once each ev...

Page 142: ...imum Transient Vibration Value With frequency weighting Wm and evaluation time 125 ms Expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 T 125ms functions every 125 ms saves the 125 ms functions and every T the T functions These last 2 types of recordings are specially designed to obtain highly detailed temporary spectral information Are indicated for measuring transitory v...

Page 143: ...Storage capacity T 1 s Î 21 hours 39 minutes T 1 min Î 1 month 4 days The storage time for each type of recording correspond to one single recording until the memory is completely full The SC310 has enought capacity for up to 285 registers final results or recordings of whatever type When the built in memory is full no more recordings may be made and no more final results saved If you attempt to d...

Page 144: ...ou to display on screen the final result of the registers stored in the SC310 memory Access the option by selecting MEMORY Î VIEW REGISTER from the SC310 menu By pressing and the SC310 allows you to select the register you want to view The screen will display an index of all the registers stored in the memory register number date and time when the measurement process began To view the different fu...

Page 145: ...entral frequency Exact base 10 frequency 1 Hz 1 000 Hz 1 25 Hz 1 259 Hz 1 6 Hz 1 585 Hz 2 Hz 1 995 Hz 2 5 Hz 2 512 Hz 3 15 Hz 3 162 Hz 4 Hz 3 981 Hz 5 Hz 5 012 Hz 6 3 Hz 6 310 Hz 8 Hz 7 943 Hz 10 Hz 10 00 Hz 12 5 Hz 12 59 Hz 16 Hz 15 85 Hz 20 Hz 19 95 Hz 25 Hz 25 12 Hz 31 5 Hz 31 62 Hz 40 Hz 39 81 Hz 50 Hz 50 12 Hz 63 Hz 63 10 Hz 80 Hz 79 43 Hz 10 10 2 Frequency weighting To measure the overall fu...

Page 146: ...5 Hz 5 012 Hz 0 750 2 50 6 3 Hz 6 310 Hz 0 669 3 49 8 Hz 7 943 Hz 0 582 4 70 10 Hz 10 00 Hz 0 494 6 12 12 5 Hz 12 59 Hz 0 411 7 71 16 Hz 15 85 Hz 0 337 9 44 20 Hz 19 95 Hz 0 274 11 25 25 Hz 25 12 Hz 0 220 13 14 31 5 Hz 31 62 Hz 0 176 15 09 40 Hz 39 81 Hz 0 140 17 10 50 Hz 50 12 Hz 0 109 19 23 63 Hz 63 10 Hz 0 0834 21 58 80 Hz 79 43 Hz 0 0604 24 38 100 Hz 100 0 Hz 0 0401 27 93 125 Hz 125 9 Hz 0 024...

Page 147: ...re Average acceleration RMS with frequency weighting Wm and evaluation time T expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 Wm aWm Peak acceleration PEAK with frequency weighting Wm and evaluation time T expressed in m s2 and as an acceleration level in dB referred to 10 6 m s2 Wm PEAK Crest factor expressed in linear and logarithmic in dB format Wm CF Maximum Transien...

Page 148: ... a log 20 LWm aWm average acceleration with frequency weighting Wm in m s2 ao reference acceleration 10 6 m s2 10 12 3 Peak acceleration PEAK Module maximum value of the instantaneous acceleration defined by T t t Wm t a 0 max PEAK aWm t instantaneous acceleration based on the time t and with frequency weighting Wm in m s2 T duration of the measurement evaluation 10 12 4 Crest factor CF Quotient b...

Page 149: ...tion Dose Value Fourth power root of the integral of the fourth power of the Wm weighted instantaneous acceleration With the evaluation time T Expressed in m s1 75 4 1 T 0 4 Wm d a VDV ζ ς aWm ξ instantaneous acceleration based on the time ξ and with frequency weighting Wm in m s2 T duration of the measurement evaluation 10 12 7 Multiplying factor K K Multiplying factor of the combined curves of t...

Page 150: ...nd frequency analysis for vibration Time window Hanning No of lines Analysis Resolution 430 2 3 Hz Frequency range displayed on the screen Zoom x1 Æ 1 kHz Zoom x2 5 Æ 400 Hz Zoom x5 Æ 200 Hz Dynamic measurement range 80 dB ...

Page 151: ......

Page 152: ... the right to modify the characteristics and accessories of this manual without a previous advice Villar 20 bajos 08041 BARCELONA ESPAÑA Tel 34 934 335 240 FAX 34 933 479 310 e mail info cesva com www cesva com ...

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