BRUEL & KJAER 2236 A-008 Manual Download Page 1

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bb090813.book : Front Black 3

October 1996

Brüel & Kjær

BB 0908–13

Precision Integrating

Sound Level Meter

Type 2236 A–008

Type 2236 B–008

Type 2236 C–008

Type 2236 D–008

With software version 2.1 or higher

Summary of Contents for 2236 A-008

Page 1: ...bb090813 book Front Black 3 October 1996 Brüel Kjær BB 0908 13 Precision Integrating Sound Level Meter Type 2236 A 008 Type 2236 B 008 Type 2236 C 008 Type 2236 D 008 With software version 2 1 or higher ...

Page 2: ...gistered trademark of International Business Machines Inc USA Copyright 1993 1996 Brüel Kjær Sound Vibration Measurement A S All rights reserved No part of this publication may be reproduced or distributed in any form or by any means without prior consent in writing from Brüel Kjær Sound Vibration Measurement A S Nærum Denmark ...

Page 3: ...e and measure with the sound level meter What you are able to do with your results The specifications and information regarding other equipment available for use with the sound level meter Service and repair of the sound level meter Explains specific terminology used in the manual and contains instructions on how to control the sound level meter from a computer Useful Information 2 An Example Meas...

Page 4: ...090813_TOC doc Black 6 0 6 Brüel Kjær Precision Integrating Sound Level Meter Type 2236 User Manual Index Fold Out Controls Display and Sockets An overview of the sound level meter s pushkeys controls and main display ...

Page 5: ... 13 1 1 Precision Integrating Sound Level Meter Type 2236 User Manual Chapter 1 Useful Information 1 1 About this Manual 1 2 1 2 About the Type 2236 Sound Level Meter 1 2 Parameters 1 2 Settings 1 3 Data Operations 1 6 Memory 1 8 1 3 Practical Hints 1 9 ...

Page 6: ... 2 About the Type 2236 Sound Level Meter 1 2 1 Parameters Precision Integrating Sound Level Meter Type 2236 is a Type 1 sound level meter complying with BS 5969 and BS 6698 It can measure the following parameters MaxL maximum SPL since the last reset MinL minimum SPL since the last reset MaxP maximum Peak level since the last reset Peak maximum Peak level in 1s interval SPL maximum RMS level in 1s...

Page 7: ...ettings are additional to the basic measurement set up They are very useful and are based on a very simple principle see the example in Fig 1 1 There are ten of them in all Auto Logging Calibration Peak Weighting Date and Time Auto Start Change Range Reset Contrast Exposure Time Interface Output Formats Checking You can check the first of the sound level meter s Settings by pressing the Show pushk...

Page 8: ...g 1 1 When you have the set up you desire for that Setting press OK to save the changes and check the changed Setting An accept cursor replaces the edit cursor to show that the sound level meter has accepted the change If you change a Setting by mistake press NO instead of OK to revert to its previous set up Fig 1 1 Principle of checking and changing the sound level meter s Set tings 931007 1e Edi...

Page 9: ... shows an overview of the available Settings Fig 1 2 An overview of the sound level meter s Settings 930721 2e 30 110 PAUSE 00 00 00 F SPL 58 6 dBA OUTPUT FORMATS INTERFACE EXPOSURE TIME CONTRAST PEAK WEIGHTING DATE TIME AUTO START CHANGE RANGE OK Show Show Show OK OK Show OK Show OK Show OK Show OK Show OK NO Show OK Show OK Show AUTO LOGGING CALIBRATION NO NO NO NO NO NO NO NO NO ...

Page 10: ... the main screen 1 2 3 Data Operations The sound level meter s Data pushkey allows you to print your measurement results data and control the sound level meter s memory It operates on a similar principle as its Settings see section 1 2 2 except that you press Data in stead of Show In addition the sound level meter returns to the main screen after you have accepted changes to the Fast Edit Pushkey ...

Page 11: ...236 User Manual selected operation There are four data operations each with its own screen Print Store Recall Erase Fig 1 3 shows an overview of the data operations Fig 1 3 An overview of the data operations available via the Data push key 930791 2e OK Data Data OK Data 30 110 PAUSE 00 00 00 F SPL 58 6 dBA PRINT STORE Data OK OK Data ERASE RECALL NO NO NO NO ...

Page 12: ...ults see Chapter 5 Leq MaxL MaxP measurement time of results Precision Integrating Sound Level Meter Types 2236 A 008 and C 008 can contain up to 21600 sets of results i e up to 64800 results with their measurement times This is enough to log for example 6hours of Leq MaxP and MaxL values logged every second Precision Integrating Sound Level Meter Types 2236 B 009 and D 009 can contain up to 86400...

Page 13: ...ing a microphone extension cable increase the dis tance between the microphone and any objects which can cause disturbances The influence of your presence on the measurement can easily be checked by changing the distance between you and the microphone and observing the change in the measured sound pressure level If your position influences the measurement result then use a microphone extension cab...

Page 14: ...Fortunately the combination of free sound field and pure tones is very rare With sound coming from several directions and as you are measuring over a broad frequency band the influence of the sound level meter s housing tripod and user becomes insignificant and the above precautions need not be taken Figs 6 8 and 6 9 show the influence of Tripod UA 0801 and Protective Cover UA 1236 under free fiel...

Page 15: ...b090813 book 2236 ch2_TOC doc Black Blue 1 BB 0908 13 2 1 Precision Integrating Sound Level Meter Type 2236 User Manual Chapter 2 An Example Measurement 2 1 Introduction 2 2 2 2 Making a Measurement 2 2 ...

Page 16: ... not been used before following these instructions If it has ensure that you are using the default set up see section 3 3 before following the steps below We have also assumed that you will calibrate the sound level meter with Sound Level Calibrator Type 4231 and that you will print out your results using Serial Printer WQ 1138 2 2 Making a Measurement Switching On 1 Press The sound level meter sw...

Page 17: ...ator s calibration chart and use Parameter and to set the sound level meter to this level 6 Fit the calibrator onto the sound level meter and rest the sound level meter on a table or other flat surface Ensure that the calibrator fits snugly on the microphone 7 Switch on the calibrator The calibrator emits the 1kHz calibration signal 8 Press OK Sound Level Calibrator Type 4231 provides a nominal ca...

Page 18: ...meters without filter sets Types 2236 A 008 and 2236 B 008 press Frequency Wt three times The frequency weighting of the RMS signal displayed in the bottom right hand corner of the screen changes through the three available weightings 12 With sound level meters with filter sets Types 2236 C 008 and 2236 D 008 press Frequency Wt twelve times The frequency weighting of the RMS signal displayed in th...

Page 19: ... it doesn t store Logged Results in its log 15 Press Edit You can now set up the sound level meter to automatically store Logged Results in its log 16 Press Parameter The screen changes to the Auto Logging set up screen shown in Fig 2 3 You can see that the sound level meter is set up to automatically store Logged Results Leq MaxL and MaxP in its log every 1s Fig 2 2 The default Auto Logging set u...

Page 20: ...mportant to select an appropriate measure ment range before starting to measure as if you change the range the sound level meter will reset see section 3 9 19 Press This clears the sound level meter s buffer of results and sets the elapsed time to zero 20 Press The sound level meter starts measuring The timer on the right hand side of the screen starts counting the elapsed measurement time The A w...

Page 21: ...efore the measurement 26 Fit the calibrator onto the sound level meter and rest the sound level meter on a table or other flat surface Ensure that the calibrator fits snugly on the microphone 27 Switch on the calibrator The calibrator emits the 1kHz calibration signal 28 Press OK The sound level meter checks the calibration signal against the calibration level you set in step 5 They should be the ...

Page 22: ...er ensure that both the printer and the sound level meter are switched off Otherwise the instruments could be damaged 33 Switch the sound level meter off Connect it to Serial Printer WQ 1138 via the Serial Interface socket on the base of the sound level meter using 9 pole Cable with 25 pole Adaptor AO1386 34 Switch the sound level meter on 35 Hold down the printer s On Line pushkey and switch the ...

Page 23: ...and the sound level meter must have the same baud rate 37 Press Data The Print Set up screen appears see Fig 2 5 38 Press OK The printer prints the Overall Results see section 1 2 4 together with a short heading containing the measure ment set up the frequency weightings of the RMS and Peak signals the time weighting and the measurement range After transferring the results to the printer the sound...

Page 24: ...bb090813 book 2236 ch2 Black 10 Chapter 2 An Example Measurement Making a Measurement 2 10 Brüel Kjær Precision Integrating Sound Level Meter Type 2236 User Manual ...

Page 25: ...the Microphone 3 3 3 2 Fitting Batteries 3 4 Replacing Batteries 3 5 Using an External Power Supply 3 6 The Back up Battery 3 6 3 3 Switching the SLM On and Off 3 8 3 4 Setting the Measurement Range 3 9 3 5 Setting the Time Weighting 3 11 3 6 Setting the Frequency Weighting 3 12 Introduction 3 12 Setting the RMS Frequency Weighting 3 12 Setting the Peak Frequency Weighting 3 14 ...

Page 26: ...ment 3 2 Brüel Kjær Precision Integrating Sound Level Meter Type 2236 User Manual 3 7 Setting the Exposure Time 3 15 3 8 Setting the Date and Time 3 16 3 9 Setting the SLM to Change Range without Resetting 3 18 3 10 Setting up Auto Logging 3 19 3 11 Setting the Viewing Conditions 3 21 ...

Page 27: ... supplied with the sound level meter onto Input Stage ZC0025 2 Insert the input stage into the input stage socket and secure by turning the threaded retaining ring see Fig 3 1 Connecting the Microphone Extension Cable 1 Gently screw Microphone Type 4188 supplied with the sound level meter onto Input Stage ZC0025 2 Insert the input stage into Microphone Extension Cable AO0408 3m or AO0409 10m and s...

Page 28: ... 2 Fitting Batteries Important Before removing batteries or disconnecting a power supply from the sound level meter make sure the instrument is switched off from the front panel by pressing You risk draining the back up battery if you remove the batteries while the sound level meter is switched on Fig 3 1 Mounting the input stage and microphone onto the sound level meter ...

Page 29: ...n the upper edge of the battery compartment and remove the lid 3 Replace the old batteries with new ones four 1 5V LR6 AA size alkaline batteries as shown in the battery com partment and press the compartment lid back into place Note If you cannot switch on the sound level meter after replacing the batteries check that they are correctly inserted The sound level meter is designed so that it will n...

Page 30: ...rom a regulated or smoothed 7 15V DC supply via the External Power socket on the base e g from the mains supply via an adaptor You can connect the external power supply even when the batteries are installed The sound level meter automatically selects the source with the highest supply voltage The ex ternal power supply will not damage the batteries but neither will it recharge the batteries Always...

Page 31: ...36 User Manual after about 10hours Fully charged the back up battery runs the clock and retains the results for about 6months These charge times are typical for a sound level meter at room temperature If the back up battery is flat the date and time will be reset to a factory set date If you find that the date and time are wrong this is probably the reason ...

Page 32: ...F Displayed parameter SPL Displayed range 30 110dB Output formats Overall Results Short Heading Logged Results Short Heading Printer Auto logging Off Exposure Time 7 30 hours Reset at range change On Auto start Off Note To switch the sound level meter on in the default set up press and hold and then press for about 1 s The sound level meter erases all results and returns to the default set up in P...

Page 33: ... the Measurement Range The measurement range is shown to the left and right of the quasi analogue scale Sound level meters without filter sets Types 2236 A 008 and 2236 B 008 have 5 measurement ranges each with a dynamic range of 80 dB Sound level meters with filter sets Types 2236 C 008 and 2236 D 008 have an extra measurement range from 10 to 90 dB you must have one of the octave filters activat...

Page 34: ...last reset OVL is shown at the right hand side of the screen under the quasi analogue scale You can set the sound level meter to reset when changing the measurement range see section 3 9 Then if there are more than 1min of measurement results in the buffer i e the elapsed time shown is greater than 1min the screen tells you that changing the measurement range will erase all previous measurement re...

Page 35: ...splayed parameter If there are more than 1min of measurement results in the buffer i e the elapsed time shown is greater than 1min the screen tells you that changing the time weighting will erase all previous measurement results from the buffer If you do not want to erase the measurement results press NO Press OK to change the time weighting and erase the measurement results 930722 1e reset reset ...

Page 36: ...nd level measurements C for checking the low frequency content of a noise if the C weighted level is much higher than the A weighted level then there is a large amount of low frequency noise L for determining the unweighted SPL XHz with filters for measuring the frequency content of a noise in order to choose for example the relevant hearing protection If there are more than 1min of measurement re...

Page 37: ... SPL 58 6 dBL 30 110 30 110 PAUSE 00 00 00 F SPL 58 6 dBC 30 110 PAUSE 00 00 0 F SPL 58 6 dBA 30 110 PAUSE 00 00 00 30 110 30 110 PAUSE 00 00 00 F SPL 58 6 dB 30 110 PAUSE 00 00 0 F SPL 58 6 dB 8kHz With filter set Without filter set 4kHz 31 5Hz F SPL 58 6 dB Frequency Wt Frequency Wt Frequency Wt Frequency Wt Frequency Wt Frequency Wt 931198 1e Settings Level Frequency Wt Parameter 0 Data Brüel K...

Page 38: ...l applications If there are more than 1min of measurement results in the buffer i e the elapsed time shown is greater than 1min the screen tells you that changing the frequency weighting will erase all previous measurement results from the buffer If you do not want to erase the measurement results press NO Press OK to change the frequency weighting and erase the measurement results 931199e Setting...

Page 39: ... does not reset the sound level meter Therefore you can investigate the effect of dif ferent Exposure Times on the LEP d after a measurement 931203 1e Settings Level Frequency Wt Parameter 0 Data Brüel Kjær Type 2236 B K 7 6 89 F S NO Edit Show OK EXPOSURE TIME 7 30 hh mm LEPd meas 930725 2e OK NO Edit 8 x Param OK Show 30 110 00 00 01 F LEPd 46 5 dBA EXPOSURE TIME 7 30 hh mm LEPd meas EXPOSURE TI...

Page 40: ...itched off if the internal back up battery is charged up see section 3 2 3 It is factory set to Central European Time CET 931204 1e Settings Level Frequency Wt Parameter 0 Data Brüel Kjær Type 2236 B K 7 6 89 F S NO Edit Show OK DATE TIME 31 MAR 1993 09 30 00 930726 2e Param Param OK NO Edit Level OK NO Level OK Show 4 x 30 110 PAUSE 00 00 00 F SPL 58 6 dBA DATE TIME 31 MAR 1993 09 30 00 DATE TIME...

Page 41: ...cision Integrating Sound Level Meter Type 2236 User Manual OK NO Level Level Param OK NO Level Param OK Param NO 930700 1e DATE TIME 31 MAR 1993 09 30 00 DATE TIME 31 MAR 1993 09 30 00 DATE TIME 31 MAR 1993 09 30 00 See previous page 59 01 00 59 01 00 23 01 00 Level Param OK NO DATE TIME 31 MAR 1993 09 30 00 2050 1994 1993 ...

Page 42: ...on you can set the sound level meter to change measurement range without resetting Note If an overload has occurred the results are not correct You can however accept them for example if the over load was of relatively short duration If the sound level meter is set to not reset when changing the measurement range you will be unable to see from the Overall Results 931205e Settings Level Frequency W...

Page 43: ...nt range you will reduce the accuracy of the measurement 3 10 Setting up Auto Logging You can set the sound level meter to automatically log Leq MaxL MaxP measurement time of results and store them at regular intervals in its log or send them via the Serial Interface to a PC The logging time i e the amount of time between each set of results can be one of the following If you change the range or t...

Page 44: ...he sound level meter will after a warning erase any previously logged results 931209 1e Settings Level Frequency Wt Parameter 0 Data Brüel Kjær Type 2236 B K 7 6 89 F S NO Edit Show OK every 1s Leq MaxP MaxL to log AUTO LOGGING 931003 2e Param Param OK OK NO OK NO Edit Show 30 110 PAUSE 00 00 00 F SPL 58 6 dBA AUTO LOGGING Off AUTO LOGGING Off AUTO LOGGING to log every 1s Leq MaxP MaxL Level only ...

Page 45: ...To erase the log see section 5 3 3 11 Setting the Viewing Conditions The sound level meter s screen can be changed to cope with various lighting temperatures conditions and viewing an gles You can switch on a back light and adjust the screen s contrast The contrast adjustment may be especially useful in very high or very low temperature environments To switch the back light on press The back light...

Page 46: ...ng Sound Level Meter Type 2236 User Manual 931211 1e Settings Level Frequency Wt Parameter 0 Data Brüel Kjær Type 2236 B K 7 6 89 F S NO Edit Show OK CONTRAST tTestTestTestTe TestTestTestTes 930800 2e 7 x Param OK Show 30 110 00 00 01 F SPL 58 6 dBA CONTRAST tTestTestTestTe TestTestTestTes CONTRAST tTestTestTestTe TestTestTestTes OK NO Edit NO ...

Page 47: ...oduction 4 2 Calibrating the Sound Level Meter 4 3 Checking the Sound Level Meter s Calibration 4 5 4 2 Checking the Sound Level Meter 4 7 4 3 Starting a New Measurement 4 8 4 4 Pausing a Measurement 4 10 4 5 Continuing a Measurement 4 11 4 6 Starting a Frequency Analysis 4 12 4 7 Setting the SLM to Start Automatically 4 13 4 8 Changing the Displayed Parameter 4 15 ...

Page 48: ... against the calibration level you set The sound level meter shows you the factor required for correct calibration and asks if you want to recalibrate If you press OK the sound level meter calibrates itself according to this new calibration level i e it adjusts itself to the calibration level you entered During this procedure the sound level meter is automatically set to use the reference measurem...

Page 49: ...alibration level to the one given on the calibration chart for the calibrator used 4 1 2 Calibrating the Sound Level Meter Sound Level Calibrator Type 4231 provides a nominal pres sure field calibration signal of 94 or 114dB at 1kHz The nominal diffuse field calibration signal is also 94 or 114 dB but the nominal free field calibration signal is 93 8 or 113 8 dB Multifunction Acoustic Calibrator T...

Page 50: ... Calibrating 4 4 Brüel Kjær Precision Integrating Sound Level Meter Type 2236 User Manual Fig 4 1 Fitting Sound Level Calibrator Type 4231 onto the sound level meter Multifunction Acoustic Calibrator Type 4226 is fitted in a similar way see its manual ...

Page 51: ...tion manual 3 Switch on the calibrator The calibrator emits a 1kHz calibration signal 4 Follow the instructions given in the figure below to cal ibrate to the relevant level for the type of measurements to be made 4 1 3 Checking the Sound Level Meter s Calibration Follow the instructions given in section 4 1 2 until the sound level meter asks whether you want to recalibrate or not Press NO twice t...

Page 52: ...Parameter 0 Data Brüel Kjær Type 2236 B K 7 6 89 F S NO Edit Show OK CALIBRATION 94 0 dB Calibr level 2 x OK Show Edit 30 110 00 00 01 F SPL 58 6 dBA CALIBRATION To calibrate press Edit OK NO Param OK NO CALIBRATION 94 0 dB Calibr level Factor X X dB check cal level calibrate 930701 3e New calibration Use new factor Factor X X dB NO OK 124 5 123 5 114 5 113 5 94 5 93 6 93 5 NO ...

Page 53: ...tery voltage level flashes 3 9 V will flash in the example shown in Fig 4 2 in very cold weather much less than half an hour is left The length of time fresh batteries last depends on the conditions of use temperature use of the back light etc Fresh alkaline batteries in a sound level meter without a filter set Type 2236 A 008 or 2236 B 008 will take over 12 hours to wear out Those in a sound leve...

Page 54: ... time shown on the screen is greater than 1min the screen tells you Up to a maximum of 255h59 If you are only interested in instantaneous parameters e g Peak or SPL you can miss out step 3 and 5 1 Calibrate the sound level me ter as described in section 4 1 2 Select a suitable measure ment range This reduces the risk of you having to change the range during a measurement in or der to avoid Overloa...

Page 55: ...easure according to IEC standards i e free field simply point the sound level meter towards the sound source If you want to measure according to ANSI standards i e diffuse field fit the supplied Random Incidence Corrector DZ9566 on the microphone The direction of the sound level meter is unimportant If however the sound field is free measure with the sound level meter at an angle of between 70 and...

Page 56: ...is shown on the left hand side of the display The clock stops counting the measurement time The display and quasi ana logue scale continue to show the current status of the displayed parameter and input signal level respectively In Pause mode how ever no results or overload indi cations are added to the buffer or the log For more information about how a pause will affect your log see section 5 8 9...

Page 57: ...anual 4 5 Continuing a Measurement Press PAUSE disappears from the display The clock continues counting the measurement time from the point at which it stopped Results are added to the buffer and if selected the log 931216e Settings Level Frequency Wt Parameter Data F S Brüel Kjær Type 2236 B K 7 6 89 Edit NO Show OK 00 06 01 F SPL 56 5 dBA 30 110 0 ...

Page 58: ...e sound level meter resets You are now ready to meas ure in the next frequency band 7 Repeat steps 3 to 6 for the other bands in which you want to analyse Only available with sound level meters with filter sets Types 2236 C 008 and 2236 D 008 1 Using Frequency Wt or change the frequency weighting to the centre fre quency of the band in which you want to start the analysis see section 3 6 2 2 Press...

Page 59: ...lly The sound level meter can be set to automatically start at any time and date within the next month e g from 19th May to 18th June 931217e Settings Level Frequency Wt Parameter Data F S Brüel Kjær Type 2236 B K 7 6 89 0 OK Edit Show NO AUTO START Off 930731 2e OK NO 5 x Param OK Show Edit 30 110 PAUSE 00 00 00 F SPL 58 6 dBA AUTO START Off AUTO START Off Level See next page only available if On...

Page 60: ...Precision Integrating Sound Level Meter Type 2236 User Manual 930789 1e OK NO OK NO Param Param AUTO START day 19 May day 19 May day 19 May time 12 00 00 On AUTO START time 12 00 00 On OK NO Param AUTO START time 12 00 00 On only available if On Level See previous page Level Level 31 02 01 23 01 00 59 02 01 ...

Page 61: ...rt is cancelled and has no effect When the set Auto Start time has passed Auto Start will be switched off when you switch off the sound level meter until then it will appear as though it is set in the Auto Start screen This prevents the sound level meter from repeating an automatic measurement every month Auto Start does not affect your use of the sound level meter while the sound level meter is s...

Page 62: ... selected It is always the L weighted output from the preamplifier and is for recording noise signals on tape transferring signals to an analyser or listening to the input on headphones To step forwards and backwards through the available parame ters press Parameter or respectively When a Peak parameter is shown the frequency weighting shows the current weighting of the Peak signal When an RMS par...

Page 63: ...ng Results in a Record 5 2 5 2 Recalling Results from a Record 5 3 5 3 Erasing Results 5 4 5 4 Setting the Interface 5 5 5 5 Setting up the Output Formats 5 7 Introduction 5 7 Output Formats 5 8 Checking and Changing the Output Formats 5 12 5 6 Printing 5 13 5 7 Transferring Results to a Computer 5 16 5 8 Interpreting the Log Times 5 19 5 9 Recording on a DAT recorder 5 20 ...

Page 64: ...ilable record that is the first set of results in record 1 the next set in record 2 etc Example If you have stored 4 records and then erased record 2 the sound level meter will store the next set of results in record 2 The next set of results will then be stored in the first available record that is record 5 930510 1e OK NO Data 2x 30 110 PAUSE 00 20 00 F SPL 58 6 dBA STORE As Rec No X Overall Res...

Page 65: ...n be recalled to the sound level meter s buffer You can then look at that record s Overall Results 931220 1e Settings Level Frequency Wt Parameter 0 Brüel Kjær Type 2236 B K 7 6 89 F S NO Show OK Data Edit F MaxL 103 2 dBA 00 20 00 RECORD NO 1 930511 4e 3 x Param OK Data NO NO NO OK OK Edit Param XX Last Record in memory 30 110 PAUSE 00 00 00 F SPL 58 6 dBA F MaxL 103 2 dBA 00 20 00 RECALL no XX R...

Page 66: ...cord all records that is the entire memory or the log 930512 2e Param Param OK Data NO 4x OK NO OK NO Edit Level only available when Record selected X last Record in memory 30 110 PAUSE 00 00 00 F SPL 58 6 dBA no X Record ERASE no X Record ERASE no X Record ERASE Logged Results All Records Record X 1 931221 1e Settings Level Frequency Wt Parameter 0 Brüel Kjær Type 2236 B K 7 6 89 F S NO Show OK D...

Page 67: ...nd level meter and the instrument for example printer or computer it is connected to via the Serial Interface socket must have the same set up to enable them to communicate without losing or corrupting data Both the handshake and the baud rate of the sound level meter s interface can be set The following types of handshake are available hardwire XON XOFF none The following baud rates are available...

Page 68: ...Manual 931222 1e Settings Frequency Wt Parameter 0 Brüel Kjær Type 2236 B K 7 6 89 F S NO OK Data Edit Show INTERFACE XON XOFF Level 9600 Baud 930732 2e 9 x Param OK Show Edit 30 110 00 00 01 F SPL 58 6 dBA XON XOFF Hardwire No handshake INTERFACE 9600 Baud INTERFACE INTERFACE OK NO OK NO Level XON XOFF 9600 Baud XON XOFF 9600 Baud XON XOFF 19200 2400 1200 Param NO ...

Page 69: ...red to a printer or computer Each type of result has its own independent output format Results The following results are available with both long and short headings Overall Results see section 1 2 4 Logged Results see section 1 2 4 Short Heading The set up of the sound level meter in a short format together with the date and time of the start of the measurement Overall Results or of the first logg...

Page 70: ... will depend on the type of printer you are using A heading with space for remarks about the measurement together with the set up of the sound level meter in a long format and the date and time of the start of the measurement Overall Results or of the first logging Logged Re sults See Fig 5 1 for an example of an output with a long heading Overall Results Note The long heading in spreadsheet forma...

Page 71: ...Manual Printer For use with an IBM Proprinter or compatible serial printer for example Serial Printer WQ 1138 The format is shown in Fig 5 2 P indicates that there has been a pause during that logging interval see section 5 8 O indicates that there has been an overload OVL during the logging interval Fig 5 2 Printer output format with short heading re sults logged every 1s ...

Page 72: ...evel Meter Type 2236 User Manual Printer 24 character line You must use this format when you use Graphics Printer Type 2318 It uses a special character set also for overall results Do not use this format with any other type of printer P indicates that there has been a pause during that logging interval see section 5 8 Fig 5 3 24 character line print ...

Page 73: ...ates that there has been both a pause and an over load OVL during the logging interval Spreadsheet A comma delimited format that is all text is in inverted commas and data are separated by commas for use with spreadsheet programs for example Excel P indicates that there has been a pause during that logging interval see section 5 8 O indicates that there has been an overload OVL during the logging ...

Page 74: ... F S NO OK Data Edit Show short heading printer Logged Results OUTPUT FORMATS 931000 3e Param Param Param OK NO OK NO OK printer Logged Results printer 24chr spreadsheet Edit Show NO OK only available when Logged Results 30 110 00 00 01 F SPL 58 6 dBA OUTPUT FORMATS short heading printer Logged Results OUTPUT FORMATS short heading printer Logged Results Level Level OUTPUT FORMATS short heading pri...

Page 75: ...switched off Otherwise the instruments could be dam aged Note that this does not apply to Portable Printer Type 2322 since it does not have a power switch To print 1 Connect the printer to the sound level meter via the Serial Interface socket on the base of the sound level meter Use one of the following cables For Portable Printer Type 2322 use Interface Cable AO 0532 supplied with printer For ser...

Page 76: ...ings 3 Set up the Output Format of the results you want to print see section 5 5 If you are using Portable Printer Type 2322 or an IBM Proprinter compatible select Printer For printing on a Graphics Printer Type 2318 select Printer 24 char line 4 Set the sound level meter in Pause mode and follow the instructions given in the figure below The printer prints the selected results in the selected out...

Page 77: ...m Param OK Data NO OK NO OK NO Edit All Records Record Logged Res Overall Res Level 30 110 PAUSE 00 20 00 F SPL 58 6 dBA PRINT PRINT Overall results PRINT Overall results only available when Record selected X last Record in memory Record no X X 2 1 931212 1e Settings Level Frequency Wt Parameter 0 Brüel Kjær Type 2236 B K 7 6 89 F S NO OK Edit Show Overall Results PRINT Data ...

Page 78: ... of these steps work consult your local Brüel Kjær service representative 5 7 Transferring Results to a Computer You can also control the sound level meter from a computer see section 8 3 Warning When connecting the sound level meter to the computer ensure that both the computer and the sound level meter are switched off Otherwise the instruments could be damaged To transfer 1 Connect the computer...

Page 79: ...truction manual for the communications program 5 Set the sound level meter s baud rate to 9600 and its handshake to XON XOFF see section 5 4 The baud rates and handshake of the sound level meter and the computer must be the same to enable them to communicate without losing or corrupting data 6 Set up the Output Format of the results you want to transfer see section 5 5 If you are using Reporter or...

Page 80: ...30998 2e Param Param OK Data NO OK NO OK NO Edit All Records Record Logged Res Overall Res Level 30 110 PAUSE 00 20 00 F SPL 58 6 dBA PRINT PRINT Overall results PRINT Overall results only available when Record selected X last Record in memory Record no X X 2 1 931212 1e Settings Level Frequency Wt Parameter 0 Brüel Kjær Type 2236 B K 7 6 89 F S NO OK Edit Show Overall Results PRINT Data ...

Page 81: ...and handshake of the sound level meter and computer If they are not the same for both change the configuration of the computer so that the settings match those for the sound level meter Which port is used on the computer The interface cable between the sound level meter and the computer If none of these steps work consult your local Brüel Kjær service representative 5 8 Interpreting the Log Times ...

Page 82: ... P in the print out For example the meas urement marked 22P in Fig 5 5 5 9 Recording on a DAT recorder Recording signals on a DAT recorder via the sound level meter is useful for getting a calibrated recording for full analysis of impulsive noise or for examining the noise for pure tones Also later on you can listen to the signal in order to be able to identify certain events such as a barking dog...

Page 83: ...ents 4 Start recording 5 Record the calibration signal from the calibrator This will allow you to accurately adjust the sensitivity of the analysis equipment on playback 6 Measure 7 After measuring record the calibration signal again 8 Stop recording and switch the sound level meter off For more information on recording using a DAT recorder see the recorder s manual Errors If the DAT recorder does...

Page 84: ...bb090813 book 2236 ch5 Black 22 Chapter 5 Storing and Transferring Results Recording on a DAT recorder 5 22 Brüel Kjær Precision Integrating Sound Level Meter Type 2236 User Manual ...

Page 85: ...bb090813 book 2236 ch6_TOC doc Black Blue 1 BB 0908 13 6 1 Precision Integrating Sound Level Meter Type 2236 User Manual Chapter 6 Specifications 6 1 Specifications 6 2 6 2 Ordering Information 6 10 ...

Page 86: ... Max Noise Floor 20 20 26 Level at which noise floor causes a non lin earity of 0 4 dB 30 30 36 Level at which noise floor causes a non lin earity of 1 dB 26 26 32 6 1 Specifications Standards Conforms with IEC 651 1979 and IEC 804 1985 Type 1 and IEC 1672 Draft June 1996 Class 1 Conforms with ANSI S1 4 1983 and Draft S1 43 6th September 1992 Type 1I Conforms with BS 5969 and BS 6698 Type 1 I 1 1 ...

Page 87: ...y f against centre fre quency fm detail of Fig 6 2 IEC tolerances are shown as dashed lines 1 0 2 4 0 5 2 Relative response dB 932123 1e 1 5 0 9 0 8 0 7 0 6 1 1 3 5 f fm Fig 6 2 1 1 octave filter characteristics as a function of frequency f against centre fre quency fm IEC tolerances are shown as dashed lines 1 10 10 0 10 20 30 40 50 60 70 80 0 5 2 20 50 0 05 3 30 0 25 0 125 8 4 Relative response ...

Page 88: ...l Only available with Types 2236 C 008 and 2236 D 008 when filter selected Battery low pause and overload with hold in dicators Time weighting and elapsed measurement time Frequency weighting Peak or RMS or filter centre frequency selected parameter with lev el Back light with switch The quasi analogue bar is updated 10 times per second Displayed parameter level updated once per sec ond Exchange R...

Page 89: ...ance 100Ω Signal Output signal from preamplifier L frequen cy weighting Clock Real time calendar and measurement duration Factory set to CET Warm up Time Less than 5s Effect of Magnetic Field 80A m 1Ørsted at 50Hz gives 34dB L Calibration Conditions Reference Frequency 1000Hz Reference SPL 94dB Reference Temperature 20 C 68 F Reference RH 65 Reference Range 50 130dB set automatically during calibr...

Page 90: ...al environment CISPR 22 1993 Radio disturbance characteristics of information technology equipment Class B Limits FCC Rules Part 15 Complies with the limits for a Class B digital device EMC Immunity EN 50082 1 1992 Generic immunity standard Part 1 Residential commercial and light industry RF immunity implies that sound level indications of 45dB or greater will be affected by no more than 0 5 dB EN...

Page 91: ...dence without random incidence corrector Fig 6 6 Typical diffuse field response of Microphone Type 4188 with random incidence corrector 931262 1e 3 2 1 0 1 2 3 10 20 50 100 200 500 1k 2k 5k 10k 20k Tol Tol Tol Tol Frequency response satisfies IEC 651 Type 1 Relative response dB Frequency Hz 931263 1e 3 2 1 0 1 2 3 10 20 50 100 200 500 1k 2k 5k 10k 20k Frequency response satisfies ANSI S 1 4 1984 T...

Page 92: ... 5 0 1 2 0 90 6 0 3 0 40 50 30 20 10 0 50 40 30 20 10 0 Q P 5 1 0 2 B r ü e l K j æ r Q P 5 1 0 2 12 5 kHz Brüel Kjær 0 3 3 0 300 270 240 2 1 0 180 1 5 0 1 2 0 90 6 0 3 0 40 50 30 20 10 0 50 40 30 20 10 0 Q P 5 1 0 2 B r ü e l K j æ r Q P 5 1 0 2 8 kHz Brüel Kjær 0 3 3 0 300 270 240 2 1 0 180 1 5 0 1 2 0 90 6 0 3 0 40 50 30 20 10 0 50 40 30 20 10 0 Q P 5 1 0 2 B r ü e l K j æ r Q P 5 1 0 2 4 kHz 2...

Page 93: ...esponse for refer ence compared to b the effect of Tripod UA0801 on the sound level meter s frequency response Fig 6 9 Effect of Protective Cover UA1236 on the sound level meter s frequency re sponse 931236 1e Relative Response dB a 100 1k 10k 0 1 200 500 2k 5k 20k 1 Frequency Hz 100 1k 10k 0 1 200 500 2k 5k 20k 1 931235 1e Frequency Hz Relative Response dB b 931234 1e Relative Response dB 100 1k ...

Page 94: ...ories Type 4231 Sound Level Calibrator Type 4226 Multifunction Acoustic Calibra tor Type 7694 Reporter Software Type 7692 dB2XL Communication Macro for Microsoft Excel Type 2322 Portable Printer includes con nector cable AO 0532 UA1251 Tripod UA0801 Tripod UA1254 Microphone Holder for tripod UA0237 Windscreen 90 mm UA0459 Windscreen 65 mm AO0408 Microphone Extension Cable 3m AO0409 Microphone Exte...

Page 95: ...bb090813 book 2236 ch7_TOC doc Black Blue 1 BB 0908 13 7 1 Precision Integrating Sound Level Meter Type 2236 User Manual Chapter 7 Service and Repair ...

Page 96: ...ing Sound Level Meter Type 2236 is de signed and constructed to provide many years of reliable operation However if a fault occurs which impairs the sound level meter s correct function then remove its main batteries and disconnect any external power supply to prevent risk of further damage For repair contact your local Brüel Kjær service represent ative ...

Page 97: ...doc Black Blue 1 BB 0908 13 8 1 Precision Integrating Sound Level Meter Type 2236 User Manual Chapter 8 Appendices 8 1 SEL 8 2 8 2 LEP d 8 3 8 3 Controlling the Sound Level Meter from a Computer 8 4 Introduction 8 4 Commands 8 6 ...

Page 98: ...6 User Manual 8 1 SEL SEL the Sound Exposure Level is the constant sound level which if maintained over 1s would have the same energy as the measured Leq over the measurement time T see Fig 8 1 Fig 8 1 SEL compared to weighted Leq 831794 1e Sound Pressure Level dB Time varying RMS Measurement duration SEL 1 s Leq Time s ...

Page 99: ...rs would have the same energy as the measured A weighted Leq ex tended over the Exposure Time Te see Fig 8 2 In Fig 8 2 LAeq the average level during the Exposure Time T the actual measurement time Te The Exposure Time The Exposure Time can be set using the sound level meter s Settings see section 3 7 Therefore you can investigate the effect of different Exposure Times on the LEP d Fig 8 2 LEP d c...

Page 100: ...d by capitals in the section title e g AUTOLog can be written as AUTOL If a command is unknown the sound level meter sends the following message UNKNOWN COMMAND If a parameter following a command is unknown the sound level meter normally treats the command message as a query message In some cases the sound level meter sends an ex planatory message instead All messages sent to the sound level meter...

Page 101: ...vely use Brüel Kjær software such as Reproter or dB2XL which are written specifically for communicating with your sound level me ter and working with and displaying sound level meter data 3 Configure the computer as follows 9600 Baud 8 data bits 1 stop bit Parity none Handshake XON XOFF see section 5 4 4 Switch on the sound level meter 5 Set the sound level meter s handshake to XON XOFF and its ba...

Page 102: ...set up of the sound level meter or order it to do something Queries Cause the sound level meter to display infor mation about its setup The command and query messages available are listed in Table 8 1 Message Command Query Message Command Query AUTOLog FW AUTOStart HAndshake BATt OFf BAUd PAuse CLock PRint CONtinue PW DEFault RANge DISp RESet ELapsed SETup ERASE STOre EXPosure TW FOrmat VErsion FR...

Page 103: ...he interface the sound level meter cannot be controlled from the computer except to change the status of the auto logging Changing the rate of logging data resets the sound level meter The data fields and their settings are listed in Table 8 1 Fig 8 3 Syntax for the AUTOLog command Fig 8 4 Syntax for the AUTOLog query message and sound level meter response 930664e To Sound Level Meter Status SP AU...

Page 104: ...mputer 8 8 Brüel Kjær Precision Integrating Sound Level Meter Type 2236 User Manual Field Name Field Setting Comments Status command I L O To interface To internal log Off Rate 1s 10s 30s 1m 5m 10m 15m 30m 1h 1minute 1hour Status response INTERFACE LOG OFF Table 8 2 AUTOLog data fields and codes ...

Page 105: ...nt auto start status The data fields and their settings are listed in Table 8 3 Fig 8 5 Syntax for the AUTOStart command Fig 8 6 Syntax for the AUTOStart query message and sound level meter response Field Name Field Setting Comments Date DD Up to 1 month ahead Time HH MM SS Status ON OFF Table 8 3 AUTOStart data fields and codes 930662e To Sound Level Meter Date SP AUTOS AUTOSTART SP Time Status S...

Page 106: ...able 8 4 BAUd The BAUd command message sets the sound level meter s baud rate After you have changed the sound level meter s baud rate you must change the computer s baud rate to the same value in order to continue communicating with the sound level meter The query message shows the current baud rate The data fields and their settings are listed in Table 8 5 Fig 8 7 Syntax for the BATt query messa...

Page 107: ...nd Fig 8 9 Syntax for the BAUd query message and sound level meter re sponse Field Name Field Setting Comments Rate command 12 24 48 96 192 1200 2400 4800 9600 19200 Rate response 1200 2400 4800 9600 19200 Table 8 5 BAUd data fields and codes 930667e To Sound Level Meter BAU BAUD Rate SP From Sound Level Meter SETTING BAUD RATE TO Rate 930668e To Sound Level Meter BAU BAUD From Sound Level Meter B...

Page 108: ...message shows the date and time on the sound level meter s calendar and clock The data fields and their settings are listed in Table 8 6 Fig 8 10 Syntax for the CLock command Fig 8 11 Syntax for the CLock query message and sound level meter re sponse Field Name Field Setting Date YYYY MM DD Time HH MM SS Table 8 6 CLock data fields and codes 930669e To Sound Level Meter CL CLOCK Date SP Time SP 93...

Page 109: ...t without resetting the sound level meter DEFault The DEFault command message sets the sound level meter to its default set up Baud rate and handshake not affected Fig 8 12 Syntax for the CONtinue command Fig 8 13 Syntax for the DEFault command 930671e To Sound Level Meter CON CONTINUE From Sound Level Meter MEASUREMENTS CONTINUED 930672e To Sound Level Meter DEF DEFAULT From Sound Level Meter SET...

Page 110: ... displayed parameter its current level and if the sound level meter is or has been overloaded since the last reset The data fields and their settings are listed in Table 8 7 Fig 8 14 Syntax for the DISp command Fig 8 15 Syntax for the DISp query message and sound level meter re sponse 930673e To Sound Level Meter DIS DISP Parameter SP 930674 2e To Sound Level Meter DIS DISP From Sound Level Meter ...

Page 111: ... 13 8 15 Precision Integrating Sound Level Meter Type 2236 User Manual Field Name Field Setting Comments Parameter command MAXP PEAK SPL MAXL MINL Leq SEL LEPd OVL Set to Leq LEP d Parameter query response MAXP PEAK SPL MAXL MINL Leq SEL LEPd OVL Leq LEP d Level XXX X dB or Table 8 7 DISp data fields and codes ...

Page 112: ...sed The ELapsed query message shows the current elapsed meas urement time The data fields and their settings are listed in Table 8 8 Fig 8 16 Syntax for the ELapsed query message and sound level meter response Field Name Field Setting Time HHHH MM SS Table 8 8 ELapsed data fields and codes 930675 1e To Sound Level Meter EL ELAPSED From Sound Level Meter SP ELAPSED TIME HHHH MM SS Time ...

Page 113: ...ter Type 2236 User Manual ERASE The ERASE command message erases the selected results The data field settings are listed in Table 8 15 Fig 8 17 Syntax for the ERASE command Field Name Field Setting Comments Result L_R X ALL Logged Results Record No X 1 40 All Records Table 8 9 ERASE data fields and codes 960399e To Sound Level Meter ERASE ERASE SP Result ...

Page 114: ...ows the current Exposure Time The data fields and their settings are listed in Table 8 10 Fig 8 18 Syntax for the EXPosure command Fig 8 19 Syntax for the EXPosure query message and sound level meter response Field Name Field Setting Comments Time HH MM Between 1min and 24hours Table 8 10 EXposure data fields and codes 930676e To Sound Level Meter EXP EXPOSURE SP Time 930677e To Sound Level Meter ...

Page 115: ...ed Output For mat The query message shows the current Output Format for the selected results The data fields and their settings are listed in Table 8 11 Fig 8 20 Syntax for the FOrmat command Fig 8 21 Syntax for the FOrmat query message and sound level meter response 930984e To Sound Level Meter SP FO FORMAT SP Type Heading Format SP 930985e From Sound Level Meter SP To Sound Level Meter FO FORMAT...

Page 116: ..._R L_R Overall Results Logged Results Format command PR24 PR SP Printer 24 char Printer Spreadsheet Heading command SH LO Short Long Type query response OVERALL RESULTS LOGGED RESULTS Overall Results Logged Results Format query response PRINTER 24 CHAR PRINTER SPREADSHEET Printer 24 char Printer Spreadsheet Heading query response SHORT HEADER LONG HEADER Only available if Type is Logged_Results Ta...

Page 117: ...evel meter s memory Together with the BATt command it is equivalent to the Status Fast Edit function available from the front plate of the sound level meter The data fields and their settings are listed in Table 8 12 Fig 8 22 Syntax for the FREE query message and sound level meter re sponse Field Name Field Setting Comments Log Status HHH MM Max 255 59 shown Memory Status XX Records Table 8 12 FRE...

Page 118: ... of the RMS signal The query message shows the current fre quency weighting of the RMS signal The data fields and their settings are listed in Table 8 12 Fig 8 23 Syntax for the FW command Fig 8 24 Syntax for the FW query message and sound level meter response 930681 1e To Sound Level Meter FW FW From Sound Level Meter MEASUREMENT RESET SP Status 930682e To Sound Level Meter FW FW From Sound Level...

Page 119: ... Type 2236 User Manual Field Name Field Setting Comments Status command A C L 31 63 12 25 50 1K 2K 4K 8K 31 5Hz 63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz Status response A C L 31 5 HZ 63 HZ 125 HZ 250 HZ 500 HZ 1 KHZ 2 KHZ 4 KHZ 8 KHZ Only available with sound level meters with filter sets Types 2236 C 008 and 2236 D 008 Table 8 13 FW data fields and codes ...

Page 120: ...e current status The data fields and their settings are listed in Table 8 14 Fig 8 25 Syntax for the HAndshake command Fig 8 26 Syntax for the HAndshake query message and sound level meter response Field Name Field Setting Comments Status command HW X NO Hardwire XON XOFF None Status response HARDWIRE XON XOFF NONE Table 8 14 HAndshake data fields and codes 932125 1e To Sound Level Meter HA HANDSH...

Page 121: ...k PAuse The PAuse command message puts the sound level meter in Pause mode The pause will take effect on the next even second of the sound level meter s clock Therefore you must wait for one full second before sending the next command to be sure that the pause condition has taken effect Fig 8 27 Syntax for the OFf command Fig 8 28 Syntax for the PAuse command 930683e To Sound Level Meter OF OFF Fr...

Page 122: ... The data fields and their settings are listed in Table 8 15 To stop a print out in progress transmit Control C i e hexadecimal 03 or ASCII ETX PW The PW command message sets the frequency weighting of the Peak signal The query message shows the current fre quency weighting of the Peak signal The data fields and their settings are listed in Table 8 16 Fig 8 29 Syntax for the PRint command Field Na...

Page 123: ...urrent measurement range The data fields and their settings are listed in Table 8 17 Fig 8 30 Syntax for the PW command Fig 8 31 Syntax for the PW query message and sound level meter response Field Name Field Setting Status command C L Status query response C LIN Table 8 16 PW data fields and codes 930686 1e To Sound Level Meter PW PW From Sound Level Meter MEASUREMENT RESET SP Status 930687e To S...

Page 124: ...r response Field Name Field Setting Comments Status command 90 100 110 120 130 140 10 90 20 100 30 110 40 120 50 130 60 140 Status query response 10 90 20 100 30 110 40 120 50 130 60 140 Only available with sound level meters with filter sets Types 2236 C 008 and 2236 D 008 when RMS Frequency Weighting is 31 5Hz 8kHz Table 8 17 RANge data fields and codes 930690e To Sound Level Meter RAN RANGE SP ...

Page 125: ...andshake and baud rate setting are not reset SETup The SETup query message shows the sound level meter s current set up The data fields and their settings are listed in Table 8 18 Fig 8 34 Syntax for the RESet command Fig 8 35 Syntax for the SETup query message and sound level meter re sponse 930693e From Sound Level Meter MEASUREMENT RESET To Sound Level Meter RES RESET 930694 1e From Sound Level...

Page 126: ...EIGHTING PEAK WEIGHTING TIME WEIGHTING DISPLAYED PARAMETER RANGE CHANGE RANGE AUTO LOGGING AUTO LOGGING RATE EXPOSURE TIME AUTO START Frequency weighting RMS Frequency weighting Peak Status A C L XXX HZ C L FAST SLOW XXX XX XXX dB WITH WITHOUT RESET ON OFF XX HH MM ON OFF See Table 8 12 Displayed Parameter See Table 8 1 Only available with sound level meters with filter sets Types 2236 C 008 and 2...

Page 127: ...ighting The data fields and their settings are listed in Table 8 19 Fig 8 37 Syntax for the TW command Fig 8 38 Syntax for the TW query message and sound level meter response Field Name Field Setting Comments Status command S F Slow Fast Status query response SLOW FAST Table 8 19 TW data fields and codes 930697 1e To Sound Level Meter TW TW From Sound Level Meter MEASUREMENT RESET SP Status 930698...

Page 128: ...meter response Field Name Field Setting Comments Version Status 2236 X 008 X A B C or D Software Status N NN VP XXXX Values for N NN and XXXX depend on version number Memory Status 128 512 KBytes Available with Precision Integrating Sound Level Meters Types 2236 A 008 and 2236 C 008 Upgrade to 512KBytes available Available with Precision Integrating Sound Level Meters Types 2236 B 008 and 2236 D 0...

Page 129: ...10 Battery back up 3 6 level 4 7 8 10 replacing 3 5 warnings 3 6 BAUd 8 10 Baud rate 5 5 8 10 BS 2475 1 3 BS 5969 1 2 6 2 BS 6698 1 2 6 2 Buffer 1 8 C C frequency weighting 3 12 3 14 6 4 8 23 8 27 Calendar 3 16 8 12 wrong date or time 3 7 Calibration 2 3 checking 2 7 conditions 6 5 free or diffuse field measurements 4 2 nominal level 4 3 when 4 2 Calibration set up Multifunction Acoustic Calibrato...

Page 130: ...11 Filter 3 12 8 22 characteristics 6 3 Fitting batteries 3 5 FOrmat 8 19 FREE 8 21 Free memory log 4 7 8 21 Free field calibration 4 2 Free field response 6 7 Frequency analysis making a 4 12 Frequency response 6 7 Frequency weighting 6 4 default Peak 3 8 default RMS 3 8 Peak 3 14 8 26 reset due to changing 3 12 3 14 RMS 3 12 8 22 shown on display 3 12 4 16 FW 8 22 H HAndshake 8 24 Handshake 5 5 ...

Page 131: ... 26 stopping 5 14 8 26 PW 8 26 Q Quasi analogue display 1 Query message overview 8 6 R Random incidence corrector 4 3 4 9 RANge 8 27 Range default 3 8 measurement 3 9 8 27 reset due to change 3 18 Recall 5 3 Recording 5 20 Records erasing 5 4 free 4 7 recalling results from 5 3 storing results in 5 2 8 30 Replacing batteries 3 5 RESet 8 29 Reset 4 9 8 29 at range change 3 18 default 3 8 due to cha...

Page 132: ...Ore 8 30 Store 5 2 Storing Overall Results 2 7 8 30 Switching off 3 9 on 2 2 3 8 Syntax computer control 8 4 T Time 3 16 8 12 wrong date or time 3 7 Time weighting 3 11 8 31 default 3 8 reset due to changing 3 11 To 5 14 8 26 Transferring results to computer 5 16 Turning off 3 9 on 3 8 TW 8 31 V VErsion 8 32 Version no 8 32 Viewing conditions 3 21 W Weighting frequency 6 4 frequency Peak 3 14 freq...

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