User Manual -- Simpson -- 897 - The Simpson 260 Resource Page
Contents
1. 50 to 99 db Lc 70 80 84 85 or 90 dB rt 3 4 or 5 dB Upper level of allowable equivalent Leq sound level exposure 115 or 130 dB 15 3 6 Sound Fields 3 6 1 Free Field This field contains no reflecting objects Ideally it is a point sound source located in free space however it can be considered to exist whenever the sound level being measured is caused mainly by the sound waves coming directly from the sound source This can occur even if there are reflecting objects 3 6 2 Reverberant Field This field is more common and exists whenever the sound level being measured contains a significant amount of direct sound waves and a relatively small amount of reflected sound waves 3 7 Microphone Orientation 3 7 1 Area Monitor in a Free Field When the Instrument is used as a fixed monitor in a free field or in a semi reverberant field the axis of the microphone should be oriented at approximately 70 with incident sound waves Furthermore the microphone should ideally be placed as far from reflecting sound surfaces as possible See below ENET AXIS OF tE SOUNDS MICROPHONE SOURCE AXIS OF INCOMING SOUND WAVE ZA Figure 3 2 Microphone Orientation 3 7 2 Fixed Position Monitor in a Reverberant Field When monitoring in a reverberant field orientation of the microphone is not criti cal 3 7 3 Use of Dosimeter as a Personal Monitor For a practical and efficient application clip the microphone to the2. Elapsed Time 8 Dynamic Range 9 Accuracy 10 Frequency Response Weighting 11 Response Time 12 Crest Factor 13 Frequency Range 14 Sound Pressure Reference 15 Linearity 60 5 dB 1 KHz 16 Criterion Duration Tc 0 52 inch 13 2 mm diameter electret con denser 148 dBA sound pressure level 1kKO Omnidirectional The free field angle of inci dence which closely approximates the ran dom response is 70 The threshold level is selectable over the range of 50 to 99 dB in 1 dB increments from the front panel The dosimeter function of the 897 is nonresponsive to noise levels below the threshold setting 0 1 dose to 999 9 above 1000 dis play will automatically convert to a higher range Dual automatic ranging either 999 9 or 9999 100 corresponds to a criterion level noise exposure for eight hours 50 corresponds to an eight hour noise expo sure equal to the criterion level minus the exchange rate Displays with 0 1 dB resolution Selectable upper limit of 115 or 130 dB Selectable at 70 80 84 85 or 90 dB from the front panel 3 4 or 5 dB selectable from the front panel Displays either hours minutes or minutes seconds up to 99 hours 59 min utes 59 seconds Timing accuracy 6 0 05 Two switch selectable ranges 50 to 100 dB and 80 to 130 dB True RMS per ANSI S1 4 1983 type S2 re quirements A weighting Slow 1 second 10 1 at maximum indication 31 5
3. 0 In Works Task Launcher go to Works Tools Click on Communications Close the Easy Connect window if necessary Click on Settings and then Communications Choose the COM Port that the Dosimeter is connected to then click on Properties Set Port Settings to match the Dosimeter Flow control Xon Xoff click OK Click OK again Click on the Dial Hang up button on the toolbar Press PRINT on the Dosimeter Data should now be displayed 28 NOTES NOTES START 25 JAN 02 08 23 CAL 114 0 dBA 08 09 25 JAN 02 RANGE 80 130 dB CAL 114 0dBa 08 40 25 JAN 02 RANGE 80 130 dB DOSE 108 0 LEQ 115 5 SPL Max 130 0 Le 90 th 80 rt 5 id 01 Pk 0 ET 17 HT 2 Elt be LMAX PEAKS RANGE HOLD 1 91 1 91 4 0 1 0 2 99 1 105 6 0 1 0 3 129 7 130 0 0 1 0 4 130 0 130 0 0 1 0 5 106 2 130 0 0 1 0 6 00 0 00 0 0 1 0 T 00 0 00 0 0 0 0 8 95 9 96 7 0 1 0 9 89 9 96 7 0 1 0 10 80 1 80 3 0 1 0 Ti 80 5 94 6 0 1 0 12 53 9 54 6 0 0 0 13 53 6 54 7 0 0 0 14 53 0 54 4 0 0 0 15 52 1 53 5 0 0 0 16 52 1 52 3 0 0 1 17 00 0 00 0 0 0 1 NOTES 1 When read by a spreadsheet program such as Microsoft Works the L 4 13 aver L MAX PEAKS RANGE AND HOLD columns will be aligned 2 00 0 indicates an underrange reading 100 0 or 130 0 indicates an overrange reading Figure 4 5 Sample Printout Spreadsheet Serial Format 1 Prn 1 Calibration Always check the calibration before making any measurement Use the Simpson Sound Level Cali
4. 1 Using Microsoft Works 4 0 oo eee cess eneeneeneetieee 28 4 14 2 Using Microsoft Works 3 0 For DOS cece cee eee eee eee eeeeeee 29 AWS Emor MCSSAGG iarsin e e a 30 12 Save data or copy to another program to print Data will remain stored in the dosimeter while the dosimeter is still on once the dosimeter is turned off the data will be erased 4 14 2 Using Microsoft Works 3 0 For Dos Access the WORKS program and follow the prompts Data is first received by the Communications portion of WORKS then moved to the word processor portion and finally into the spreadsheet From the Quick Start Options Menu select Create a New File and then continue below 4 15 Error Message If the display indicates ERRO3 turn off the dosimeter and wait 10 seconds Then turn the dosimeter on This resets the 897 and the calibration is unaffected Communications lt OK gt Options Communication Baud Rate match the 897 try 9600 Data Bits 8 Stop Bits 1 Handshake Hardware Parity None Port COM1 or COM2 as required lt OK gt File Save this will save the setup Transfer Capture Text Save file as 897 DAT lt OK gt Connect Connect gt gt On the 897 slide the OFF ON HOLD SWITCH TO HOLD AND PRESS PRINT You will see the data appear on the computer screen When the data stops appearing Connect Connect OK to disconnect lt OK gt File Close File Open Existing File 897 DAT lt
5. 16 hours before use Preparation For Use Accuracy of measurements can be affected by several factors including the po sition of the microphone with respect to the sound source and the positioning of the microphone on the user Read Section 3 carefully for general background information In operation the Instrument can be attached to the belt with the clip provided or can be placed in the shirt pocket Ideally the microphone should be clipped 11 upright to the shirt on the center of the shoulder If this is impractical clip the microphone facing upward on the shirt collar To protect the microphone in dusty or windy environments place the windscreen over the microphone before at taching it to the shirt 2 3 Warranty The Simpson Electric Company warranty policy is printed on the inside front cover of this manual Read it carefully before requesting warranty repairs For all assistance including help with the Instrument under warranty contact the factory Give full details of any difficulty and include the Instrument model number and date of purchase Shipping instructions will be mailed promptly If an estimate of charges for nonwarranty or other service work is required a maximum charge estimate will be quoted This charge will not be exceeded without prior approval 2 4 Shipping Pack the Instrument carefully and ship it prepaid and insured to the proper desti nation 3 APPLICATION This section contains the basic infor
6. Dimensions Length 6 8 inches 172 mm Width 3 1 inches 80 mm Thickness 1 1 inches 28 mm excluding microphone and clip Weight 18 oz 500 gm 25 Environmental Specifications Temperature Influence 60 03 dB C 10 to 25 C 60 05 dB 25 to 50 C Reference 1000 Hz and 105 dB Operating Range 10 to 50 C Storage Range 30 to 45 C limitation of batteries Humidity Influence Less than 0 5 dB over measurement range Range 0 to 95 RH Magnetic Field No effect when placed in a field of 1 oersted 80 A m with Model 897 oriented for maxi mum sensitivity to the field Correction data is provided in the calibrator s operators manual Atmospheric Pressure 2 PREPARATION FOR USE This section contains instructions for preparing the new Instrument for use Also included are unpacking and inspection procedures warranty and shipping in structions Unpacking And Inspection Examine the shipping carton and Instrument for damage If undamaged check for internal damage Preliminary checks of the operating condition of the Instru ment can be made after carefully reading Section 4 If there is external or internal damage immediately file a complaint with the carrier Make certain all items in Table 1 1 are included in shipment Save the shipping carton for possible future shipping of the Instrument NOTE The 897 is powered by a self contained rechargeable nickel cadmium battery pack Charge Instrument for
7. O O B oo o a O pH e or 8 9 100 Duration Sound level Per Day dB A in Hours Slow response 27 9 24 3 21 2 18 4 16 00 13 93 12 12 2 30 2 00 100 1 74 1 52 1 32 1 15 ro w Varying Level Noise 5 27 4 59 4 00 3 48 3 03 2 64 When daily noise exposure is composed of two or more periods of noise expo sure at different levels consider their combined effect rather than the individual effect of each The total dose is computed by the expression C1 C2 Cn T1 T2 tTn Where D is the noise dose C1 C2 Cn are the actual segments of exposure time at different noise levels and T1 T2 Tn are the allowed time intervals see Table 4 1 for the mentioned segments of exposure Unlike a sound level meter a dosimeter computes automatically the exposure D and displays the accumu lated percentage of the allowed exposure B Duration computed from 2 exp L 90 rt where L dB level and rt exchange rate 5 dB in this example table From the Federal Register Vol 46 No 162 August 21 1981 14 4 3 4 4 Top Panel Operating Features Table 4 2 Top Panel Operating Features 1 RANGE switch A 2 position switch that selects the operating range for sound level measurements The available ranges are 50 to 100 dB and 80 to 130 dB The data logger records the position of the switch and the time of any changes in the position 2 SPL CAL adjust Used with a calibrator to set the
8. These saved readings are only viewable with the data output printout 5 DOSE PEAK Alternately displays the DOSE in percent or the number of 140 dB or greater peaks that have been detected since entering RUN 6 TIME Alternately selects an elapsed time display of minutes seconds or hours minutes since the Dosimeter was first switched into RUN mode Hours minutes is displayed with a flashing color indicator 7 INT 60 sec Displays the sound pressure level integrated average over a 60 second time period The 60 second time period begins whenever the Dosimeter is switched into RUN from either OFF or HOLD It then updates continuously using the latest 60 seconds of accumulated sound pressure levels Additional de pressions of this button will sequentially display the latest settings of the programmable options namely cirterion level threshold level exchange rate time weighted average upper limit serial output format unit ID baud rate and time clock Notice that it is not possible to change the settings here only to observe them Refer to paragraph 4 6 for programming procedures 8 Leq Max Alternately displays Leq based on eight hours in dB or the maximum sound pressure level in dB since entering RUN 9 Print Instrument prints out one of the two output formats available from the data logger depending on which accessory cable is presently connected This switch only functions
9. be attached to the operator s shirt close to the ear When used as a sound level meter the Instrument is hand held A front end attachment properly contoured to avoid interference with incoming sound waves holds the microphone The advanced microcomputer large digital display and special electret condenser microphone offers easy operation and readability and excellent performance and reliability Items Furnished With Instrument All items furnished with the 897 are listed in Table 1 1 Table 1 1 Items Furnished with the Instrument Qty Description Part No 1 Windscreen Dust Cover 5 119753 1 Microphone Clip 5 119752 1 Splined Wrench 6 113274 1 Screwdriver adjusting 5 116470 1 Microphone Adapter 10 865235 1 Operators Manual 6 115891 1 Parallel Cable 02234 1 AC Charger 6 115095 1 Carrying Case 10 865926 Optional Items Description Part No 887 2 Sound Level Calibrator 12648 RS 232 Serial Cable 02233 1 3 Technical Data The 897 conforms to ANSI S1 4 1983 ANSI S1 25 1978 and IEC651 1979 standards for type S2A sound level meters and noise dosimeters Table 1 2 lists the technical specifications for the 897 Noise Dosimeter Sound Level Meter Table 1 2 Instrument Specifications Dosimeter Specifications 1 Microphone Type Maximum Pressure Impedance Directional Characteristics 2 Threshold Level 3 Dose Resolution Maximum Indication 4 Leq Display 5 Criterion Level 6 Exchange Rates 7
10. correct level 3 EXT DC Used with the supplied battery charger to recharge the internal nickel cadmium batteries The Dosimeter may be operated while connected to the charger 4 DATA OUTPUT CONNECTOR Use with either parallel or RS 232 Serial accessory cable to obtain data DATA OUTPUT OOO OO0O000 OOO0000 Figure 4 2 Top Panel A The 897 is designed to be used with the Simpson Battery Charger part no 6 115095 which is insulated well enough to permit use of the 897 while being charged This charger has a rated input of 108V AC to 264V AC at 50 60 Hz Use of any other charger may be hazardous to the operator or the 897 The self contained rechargeable nickel cadmium battery pack should be charged before operating the Instrument for the first time or when the Low Battery Indica tor LO BATT is displayed or before extended use where a power source is not available The Instrument may be operated with the battery charger connected and thereby maintaining its charge however cycling of the charge is healthy for Ni Cad batteries and extends their life Do not attempt to keep them fully charged all the time 19 Battery Charging are suspended and printouts will indicate HOLD during the time SPL is selected HOLD In HOLD mode all data is retained without any modification except that the elapsed time clock is kept running The display will alternately flash between HOLD and the present
11. segment test is performed Next the 897 will display in sequence given Lcnn Criterion Level thnn Threshold Level rtn Exchange Rate SPL Display Example 4100 4 5 1 Underrange Display The display will indicate ur if the SPL is underrange i e under 50 on the 50 to 100 dB range or under 80 on the 80 to 130 dB range 4 5 2 Overrange Display The display will indicate if the SPL is overrange i e over 100 on the 50 to 100 dB range or over 130 on the 80 to 130 dB range 4 5 3 Diagnostic Memory Test The Instrument automatically performs a self diagnostic memory test when turned on However the operator may access and display this self test routine via the TEST switch The self test contains a complete memory diagnostic a display test routine and a continuous real time clock display These three tests are en abled by pressing the TEST switch down and sliding the OFF RUN HOLD switch to RUN The display will first show t 1 If that passes it will automatically proceed to t 2 and t 3 Each of these tests t are verifying different portions of the internal memories If any of these fail the display will change to Err with the 20 a a a a aS pt Ot B AND aT FREQUENCY RESPONSES FOR SLM WEIGHTING CHARACTERISTICS RELATIVE RESPONSE DECIBELS 20 50 100 200 500 1000 2000 5000 10 000 20 000 FREQUENCY Hz Figure 3 1 A B amp C Weighted Electrical R
12. shirt on the shoulder just below the ear with the microphone diaphragm facing upward NOTE The user of the Instrument disturbs the sound field near the microphone at the upper limit of frequencies For many practical situations the measurement error is relatively small typically 1 to 3 dB higher than would occur with a fixed monitor position Since the fixed monitor cannot easily follow the motion of a mobile individual the personal dosimeter is the most accurate practical means of measuring individual noise dosage 16 3 8 Windscreen NOTE When the 897 is exposed to a dusty or windy environment the windscreen should be used to protect the microphone diaphragm from damage and to as sure a correct reading The windscreen will reduce the effects of wind noise by approximately 20 dB without seriously affecting the frequency response of the microphone Grease and dirt on the windscreen may affect the accuracy of sound measure ments Under severe conditions the windscreen should be cleaned often To clean wash with a mild detergent thoroughly rinse and dry before placing over the microphone 4 OPERATION This section provides the instructions required for the operation of the 897 4 1 Safety Precautions Read Section 3 before performing dosage measurements Section 3 contains important information pertaining to sound and noise measurement terminology standards operating techniques and precautions 4 2 Operating Items And
13. tovsvasswawaad cesteeins antgncsusdivbasdideteanedsasivisstedsdivettea queaneversueuees 17 Ai Satety PreCAUtlOnS siseses terasi e ian i S e 17 4 2 Operating Items And Features ssesssesessiseereerenrrrurrusrusrneresensrnnrenens 17 4 3 Top Panel Operating Features eeeeseeeeeeseeeeeerieerrrerrresrresrreens 19 44 Battery Charging ccctiiiiiticicciiiietevneciiien iii aeisiinieseeacisees 19 4 5 Preliminary COCKS cc c seccsecesccpsiccdiceviet tiecs esdesnctdui ves staseeesitneeetvdinaeeds 20 4 5 1 Underrange Display 20 4 5 2 Overrange Display 2 20 45 3 Diagnostic Memory TeSt ccicississccsecassseecets costs acccscentiesenaacenrvae cotezen 20 4 6 Setting The Dosimeter Parameters ccceeeeeeeeeeeeeteeeeeteteeeeeeeees 21 4 6 1 The Dosimeter Parameters cceceeeceeseeseeeseeseeeteeeceeeeeeeeneeeneeteee 21 46 2 To Program the DOSIM tET vristi 21 A7 Security COMUOMS scssi eini anida ides owsdees lens 23 4 8 Selection Of Parallel Or Serial Output Format n 23 4 9 Automatic Data Loggen tssirini sienna 23 4 10 Data Output Formats Sers isie anora aide ean cit 24 4 11 Parallel Output And Serial Format 2 Prn 2 ceceeeeeeeeeeeeeeeeee 24 4 12 Spreadsheet Output Format Prn 1 ooo eee eeeeeeeeeeeeeeeeeeeeteeeseeees 26 4 13 Calibrationivcacciiwcnnah een asanace nai ikada enaiis a piai 27 4 14 Dosimeter Application 2 2 0 ece cece eeteeeeeeeeeeeeeeeeeeeeeteaeeeeeneeeneeees 28 4 14
14. while the Dosimeter is in the HOLD mode See para graph 4 9 for further niomaton 3 3 2 Impact Noise For compliance exposure to impulsive or impact noise must not exceed 140 dB A peak sound level Dosimeter To accurately determine a dosage level using a sound level meter is a tedious procedure as the total length of exposure at each dB level must be weighted and summed accumulated The dosimeter function of the 897 automatically and continuously performs these mathematical manipulations while it is operating and provides the dosage readout directly in percent of allowable exposure Dosimeter Equation The dosimeter function is defined by ANSI S1 25 as T L Le Dose D 10 10 q dt whenL gt Lt Cc 0 Where q rt log 2 Thus T L Le D 100 2 t dt Tc 0 Since the A D converter is performing continuous integration the computer must only resolve kate rt D 100 Tc 2A Note that the result is expressed as a percentage The equivalent sound level during the sample time T over which a percentage criterion exposure dose is measured is Leq Lc q log D Tc 100 T D percentage criterion exposure Tc criterion sound duration defined as 8 hours T actual exposure duration in hours L slow A weighted sound level Lc criterion sound level Lt threshold level rt exchange rate the change in sound level corresponding to a doubling or halving of the exposure duration User selectable items Lt
15. E E E K 1 1 1 2 END OF REPORT NOTE 00 0 Indicates an underrange reading 100 0 or 130 00 indicates an overrange reading Figure 4 4 Sample Printout Parallel Output and Serial Format 2 Prn 2 25 observed during the preceding minute not the same as the MAX function switch the number of 140 dB peaks during the preceding minute the RANGE switch setting and the occurrence of the dosimeter entering the HOLD mode This data is available only via the Data Output connector 4 10 Data Output Formats Two standard output formats are available from the data logger of the dosimeter a summary report that can be printed on either a parallel printer or an RS 232C serial printer and an output that is ideally formatted as input into a multi column spreadsheet type program such as Microsoft Works Each output format in cludes information of total HOLD time dose Leq SPL MAX total number of 140 dB peaks and a minute by minute output of the data logger Following are sample printouts of the same data recorded by the 897 in each of the output formats To obtain a printout in either one of the formats first set the dosimeter to HOLD then press the PRINT button to print the data 4 11 Parallel Output And Serial Format 2 Prn 2 A sample of the summary report is illustrated in Figure 4 3 The report is divided into four parts for explanatory reasons Heading Measurement Summary Histograph and th
16. Features All front panel operating controls are described in Table 4 1 and shown in Figure 4 1 Top panel adjustments controls and connectors are described in Table 4 2 and shown in Figure 4 2 Table 4 1 Front Panel Operating Features 1 OFF RUN HOLD Control Sin 897 DOSIMETER l SOUND MEASURING SYSTEM A 3 position slide switch used to activate the Instrument and hold accumulated data OFF Power is removed from su 98 99 3 the Instrument and all accumu lated data is erased When 4 t switching from RUN to OFF there is a minimum three sec ond delay before the 897 actu ally goes off This will aid in pre venting accidental loss of accu 4 7 mulated data During this three CAL J eseo second period the display may SS e appear dim this is normal op 5 8 eration RUN In RUN mode all data a fe relating to DOSE Leq INT 60 pem 9 sec MAX and PEAK is continu ously monitored updated and stored except when in SPL mode of operation In the SPL mode all dosimeter functions 17 SIMPSON ELECTRIC CO ELGIN IL 60120 Figure 4 1 Front Panel
17. Hz to 8 KHz 0 dB 20 u Pascals 50 100 Range gt 60dB 80 130 Range gt 90dB 8 hours 8 Hrs Min is the real time that the data was logged Lava iS the integrated 60 sec reading L MAX is the maximum sound pressure level for that minute PEAKS is the number of 140 dB peaks detected in that minute RANGE is the range setting selected during that minute Readings preceded by an asterisk indicate they were either overrange or underrange 00 0 indicates an underrange reading under 50 on the 50 to 100 dB range or under 80 on the 80 to 130 dB range 100 0 indicates an overrange reading on the 50 to 100 dB range 130 0 indicates an overrange reading on the 80 to 130 dB range 4 12 Spreadsheet Output Format Prn 1 SIMPSON 897 Dosimeter Sound Analysis Report Type S2A CRITERION 90dB THRESHOLD 80dB EXCHANGE RATE 5dB UNIT IDENTIFICATION 01 JOB NAME LOCATION START DATE 25 JAN 02 START TIME 08 23 CALIBRATION 114 0 dBA 08 09 25 JAN 02 RANGE 80 130 dB CALIBRATION 114 0 dBA 08 40 25 JAN 02 RANGE 80 130 dB MEASUREMENT SUMMARY RUN TIME 00 17 HOLD TIME 00 02 LEQ 115 5dBA SPLMAX 130 0 dBA DOSE 108 0 140 dB PEAKS 0 HISTOGRAPH 5 MIN AVERAGE LEVELS IN dBA 70 HRS MIN 08 24 08 25 08 30 08 35 08 40 HRS MIN HRS MIN 08 24 08 25 08 26 08 27 08 28 08 29 08 30 08 31 08 32 08 33 08 34 08 35 08 36 CHANGED 50 100 50 100 50 100 50 100 50 100 50 100 cE E K E 1
18. OK gt Open File As lt Word Processor gt lt OK gt Select Replace Search for lt Replace All gt lt OK gt 29 g 4 14 FULLY INSERT MICROPHONE Sa E ue Jinou 897 DOSIMETER SET TO 114dB 1 SOUND MEASURING SYSTEM POSITION 8 SE SET TO RUN ON 114dB OFFRUNHOLD LOCK OFF HH O T Simon 887 2 SOUND LEVEL CALIBRATOF PRESS CAL SPL INT CAL 60 sec TEST SETUP DOSE Leq PEAK MAX TIME PRINT SIMPSON ELECTRIC CO ELGIN IL 60120 Figure 4 5 Calibration Hookup Optional The time and date of this calibration may be recorded in the Instrument s memory by pressing and holding the SPL CAL switch until the display flashes CAL The Instrument will retain the two most recent such occurrences which may be observed only via the DATA OUTPUT Due to changes in atmospheric conditions it is recommended that Instrument cali brations be conducted and recorded at the beginning and end of the day Turn off the calibrator remove the microphone and replace the windscreen Dosimeter Application The following text describes how to transfer data from the Simpson 897 Dosim eter into an IBM compatible computer using Microsoft Works Using the optional RS 232 C serial cable catalog 02233 connect the 897 to your computer s serial port either COM1 or COM2 4 14 1 Using Microsoft Works 4 0 1 DaN 00N Sos Start Works 4
19. SIMPSON ELECTRIC COMPANY 520 Simpson Avenue Lac du Flambeau WI 54538 0099 715 588 3311 FAX 715 588 3326 Printed in U S A Part No 06 115891 Edition 6 05 07 Visit us on the web at www simpsonelectric com Model 897 Dosimeter Sound Measuring System OPERATOR S MANUAL Sia 897___ DOSIMETER L SOUND MEASURING SYSTEM LO BATT DOSE SPL MAX dBA ze 88 88 OFF RUN HOLD LOCK SPL INT CAL 60 sec TEST SETUP DOSE Leq PEAK MAX a TIME PRINT SIMPSON ELECTRIC CO ELGIN IL 60120 About this Manual To the best of our knowledge and at the time written the information contained in this document is technically correct and the procedures accurate and adequate to operate this instrument in compliance with its original advertised specifica tions Notes and Safety Information This Operators Manual contains warning symbols which alert the user to check for hazardous conditions These appear throughout this manual where appli cable and are defined below To ensure the safety of operating performance of this instrument these instructions must be adhered to A Warning refer to accompanying documents AN Caution risk of electric shock AN This instrument is designed to prevent accidental shock to the operator when properly used However no engineering design can render safe an instrument which is used carelessly Therefore this manual must be read carefully and com pletely before making any measure
20. ble configuration is required the pinout of the DATA OUTPUT connector is shown below DATA OUTPUT PINOUT PIN USE PIN USE 1 Must not be connected for parallel 9 Parallel bit 7 output Must be connected to pin 4 for serial 10 Serial data output 2 Parallel bit 6 output 11 Parallel bit 4 output 3 Parallel bit 5 output 12 Parallel bit 3 output 4 Ground 13 Ground 5 Parallel bit 2 output 14 Parallel bit O output 6 Parallel bit 1 output 15 Parallel data ready input Te Serial cts input 8 Parallel data strobe output The requirements for the RS 232C output are 8 bit words no parity 1 stop bit Data is transmitted only there is no data receive function Handshaking is via one signal line CTS Automatic Data Logger The dosimeter has a self contained data logger with a 31 hour storage capability and will store up to to 31 hours of data as long as the OFF RUN HOLD switch is never switched to OFF and or the self contained batteries do not become fully discharged On a once per minute basis the following information is logged the present value of the INT 60 sec function the maximum sound pressure level 23 NOTE In order to determine how much the Leq exceeds the OSHA upper limit of 115 dB set the Leq to 130 dB Example hiiS 5 Serial Output Option 1 or 2 Prn Option 1 formats the data in spread sheet format for a computer option 2 outputs the data formatted for a serial
21. brator Model 887 Series 2 a b Remove the windscreen if used and carefully insert the microphone fully into the acoustic cavity of the Calibrator Set the calibrator power switch to the ON position and check that the cali brator battery is okay Never place the operating calibrator tightly against the ear The high sound level could be harmful especially to someone with a hearing deficiency Set the OFF RUN HOLD slide switch in the 897 to the RUN position Wait until the Display Test sequence is completed then depress the SPL CAL switch Select the desired range For checking at 94 dB use the 50 100 range for checking at 114 dB use the 80 130 range If calibration is required using the screwdriver supplied with the calibrator turn the adjustment control until a reading of either 94 0 dB or 114 0 dB is indicated on the display 27 A sample of the Spreadsheet output format is illustrated in Figure 4 5 It is very similar to the summary report except it does not include a histograph and the minute by minute data is not in real time but in elapsed time The Spread Sheet output is once for each minute of data saved by the data logger that is once for each minute of Elapsed Run Time ET Lva is the integrated 60 sec reading L max S the maximum sound pressure level for this minute PEAKS is the number of 140 dB peaks detected this minute RANGE can be 0 for the 50 100 range 1 for 80 130 or 1 if the ra
22. charger part number 6 115095 which is adequately insulated to permit use of the 897 while being charged This charger has a rated input of 108 V AC to 264 V AC at 50 60 Hz Use of any other charger may be hazardous to the operator or to the 897 Internal Rechargeable Nickel cadmium Battery Pack Rechargeable with supplied recharger Battery Life Approximately 40 hours between charges in RUN Approximately 60 hours between charges in HOLD NOTE When the Instrument is switched to RUN and the display shows ERR3 and LO BATT the battery must be charged at least 8 hours Low Battery Indicator Automatically displays LO BATT to indicate at least eight hours of time remaining 22 Display 4 digit liquid crystal display with six additional characters SPL SPL MAX INT 60 LO BATT DOSE dBA plus a colon and decimal point 23 Keyboard Selected Functions SPL CAL Sound Pressure Level INT 60 Sec Continuous 60 second integrated SPL also referred to as Liyo DOSE In percent PEAK The number of detected 140 dB peaks up to a maximum of 250 Leq The eight hour Time Weighted Average MAX The maximum detected SPL TIME Displays elapsed HRS MIN or MIN SEC PRINT Activates the Data Output 24 Mechanical Construction Security Provisions Special 4 spline wrench provided to lock OFF RUN HOLD slide switch into any po 10 Clock are saved in nonvolatile memory the settin
23. conds after the power is turned off With supplied cable communicates with any Centronics compatible 80 column printer With accessory cable catalog 02233 com municates with any serial computer port at baud rates of 300 600 1200 2400 4800 or 9600 Serial port set for 8 bit words no par ity 1 stop bit It will also function with many RS 232C serial printers Includes criterion level threshold level elapsed run time elapsed hold time Leq SPL MAX dose and number of 140 dB peaks A five minute average level histograph is then output which addition ally gives indications of the RANGE switch setting and activation of HOLD mode This is then followed by a complete listing of all stored information on a minute by minute basis See para 4 10 for further details Includes criterion level threshold level ex change rate unit identification number elapsed hold time Leq SPL MAX dose and number of 140 dB peaks This is then fol lowed by a complete listing of all stored in 9 formation on a minute by minute basis All of this data is formatted either for convenient input to a spreadsheet program such as Microsoft Works 3 0 for DOS or in the same format as the parallel printer Real Time Clock A real time clock provides time and date in formation on the printout The clock contin ues running even with power OFF A 21 Power Requirements The 897 is designed to be used with the Simpson battery
24. e Minute by Minute Data Logger Output Heading includes Type of report measurement parameters set by the operator location and job identification as assigned by the operator Date and time the Instrument was first set in RUN mode of operation Also included are calibration data and time if recorded by the operator See para graph 4 13 for calibration instructions Measurement Summary includes the following Run Time Total time Instrument was in RUN mode Hold Time Total time Instrument was in HOLD mode of operation Leq The eight hour TWA time weighted average expressed in dBA This measurement can be from the threshold level set by the operator up to 130 dB SPL Max The maximum sound pressure level recorded by the data log ger DOSE The calculated dose in percent A 100 equates to a criterion noise level exposure for an eight hour time period 140 dB Peaks Total number of 140 dB peaks recorded Histograph presents five minute averages of the minute by minute L read ings The histograph is independent of the range setting however when the L readings are either underrange as indicated by 00 0 or overrange as indicated by 100 0 or 130 0 then these readings are averaged into the 5 minute summary For example if Lye 00 0 as noted in Figure 4 3 then 0 0 dB is averaged in the five minute histograph Note that the five minute averages start on the minute ending in either a 0 ora 5 ther
25. ect to misuse negligence or accident incorrect wiring by others or installation or use not in accord with instructions furnished by the manufacturer NOTES 31 NOTES NOTES 30 3 T Contents INTRODUCTION Sopiro ioan R 1 1 General Description 1 2 Items Furnished With Instrument eseeeeeeeeeeeeeeeseesreernrsrreereeereses 13 Technical Data menaa sa A NNN PREPARATION FOR USE ceceeeeeees 2 1 Unpacking And Inspection 2 2 Preparation For Use 2 9 Wafaniy dsiciesidniiieentintinaiiannnianhnsenndiicinosvaien 2 4 SHIPPING scnasena ena aaa aieea onic APPLICATION naonana 3 1 Decibel Scale siisi esiseina aee n A aa EEE EE E 3 2 Sound Level Meter siriissscaincsniasssi asinn ce eesstcnvaen toot 3 3 Measurement And Exposure Standards r teense 13 3 3 1 Steady Level or Slowly Varying Noise 0 0 0 cece eee cece 13 3 32 Mpa t NOISE seccina riseiras 15 E A E oE EE EE E T 15 3 5 Dosimeter Equation 36 SOUNG FICIGS wc terteethes rai oiae 3 6 1 FOS FICC E scan devveceneence le vuea vee A 3 6 2 Reverberant Field 3 7 Microphone Orientation 3 7 1 Area Monitor in a Free Field 0 0 eee eeceeeseeseeesceceeeseeeteeeeeeeeseeeneeteee 16 3 7 2 Fixed Position Monitor in a Reverberant Field ceeeeeeeeeeeees 16 3 7 3 Use of Dosimeter as a Personal Monitor ou cee eee 16 BiB WINGOSCIS CM eset teenin eraen oo eirio i a 17 OPERATION
26. efore the initial and final averages may be less than 5 minute interval aver ages as noted in Figure 4 3 The Instrument was in either the HOLD or SPL mode of operation at anytime during the five minute interval if the reading is followed by the word HOLD Minute by Minute Data Logger Output includes the following 24 17 18 19 20 Calibration 140 dB Peaks Warm up Time Data Logger Recording Time Stored Information Storage Rate Data Retention Data Output Port Parallel RS 232C Serial Data Output Format Parallel Serial Instantaneous with 100 Hz 94 dB or 114 dB SPL calibrator and adjustment on the top of the 897 However an annual factory recalibration is recommended Front panel selectable display indicates number of 140 dB peaks that have been de tected One minute 31 hours maximum Any data beyond this time is not stored only the first 31 hours are retained a The integrated 60 second average Lave b The highest SPL Lmax c The number of detected 140 dB peak occurrences d HOLD switch status e RANGE switch status Data is stored at 00 01 00 hrs min sec and once per minute thereafter Data is retained for as long as the unit re mains powered in the RUN or HOLD modes all data is lost in the OFFf mode However to minimize the chance that data may be lost inadvertently the data is retained for 3 se
27. ence c Once the desired parameter is displayed press the Test button see Figure 4 1 to select the available choices of that parameter The digit or digits which will change as a result of pressing the Test button will flash The display prompt for each function is given within the parenthesis Table 4 3 Setup Mode Sequence 1 Criterion Level Lc 70 80 84 85 or 90 dB Factory set at 90 dB as recommended by OSHA te 96 2 Threshold Level units digit th 0 through 9 Threshold Level tens digit th 5 through 9 thus the threshold may be set to any value from 50 through 99 dB Factory set at 80 dB Example L 8 a 3 Exchange Rate rt 3 4 or 5 dB Factory set at 5 dB as recommended by rt S Example 4 Leq Upper Limit H 115 or 130 dB Factory set at 115 dB as recommended by OSHA 21 The approximate required time to fully charge the battery pack in hours is lin early proportional to the operating time of the dosimeter See graph Figure 4 3 below 16 CHARGE TIME HOURS 10 2 0 15 40 OPERATING TIME HOURS Figure 4 3 The Instrument will operate from the battery for approximately 40 hours between charges in the RUN position or approximately 60 hours between charges in the HOLD position however this time will vary according to use 4 5 Preliminary Checks Set the OFF RUN HOLD switch to the RUN position When the unit is first turned on a display
28. esponses 3 3 Measurement And Exposure Standards Sound level meter measurement standards are defined in American National Standards Institute ANSI Specification S1 4 1983 Federal State and local gov ernments also have defined allowable noise undesirable sound energy level exposure limits for persons in industrial environments Selected and applicable parts of those currently in force are cited in this manual NOTE Standards and government regulatory laws are subject to modification or expansion Always check for latest available documents and information The Occupational Safety and Health Act of 1970 OSHA The Walsh Healy Act Federal Register Vol 34 No 96 and paragraph 1910 95 of the Occupational Safety and Health Standards Federal Register Vol 46 No 162 set the present legal standards of allowable employee noise exposure limits and are shown in Tables 3 1 and 3 2 3 3 1 Steady Level or Slowly Varying Noise Table 3 1 Permissible Noise Exposure Limits Based on 90 dB criterion level and 5 dB exchange rate Duration Per Day Sound Level dBA in Hours SLOW Response 8 90 6 92 4 95 3 97 2 100 1 1 2 102 1 105 1 2 110 1 4 or less 115 13 Table 3 2 Permissable Noise Exposure Limits for Continuous Noise Duration Sound level per day dBA in hours Slow response 106 107 PT e f oe o 8B 05 a 0o50 S om e os ee og 10 56 88 029 919 89 03 8 00 S2 o2 aa O 2
29. gs are retained even if the battery becomes fully discharged Security Controls The 897 has been designed with two special security provisions to prevent unau thorized personnel from tampering with the control settings A function lockout feature prevents selected functions from being changed This is accomplished by selecting the desired function and while pressing this button moving the OFF RUN HOLD control switch from RUN to the HOLD position and then back to the RUN position The function touch pad is now disabled and no further function selections will be acknowledged To regain control of the func tion selections simply move the OFF RUN HOLD switch from RUN to HOLD and back to the RUN position The OFF RUN HOLD control switch can be locked in any one of the three positions by inserting the 4 spline wrench into the Bristol Screw located next to the switch and turning the screw clockwise Selection Of Parallel Or Serial Output Format The selection of either the parallel or serial output is performed by the available accessory cables No other user action is required other than setting the RS 232 Baud Rate The accessory RS 232 cable comes with a female dB 9 connector which is standard on IBM PC AT and compatible personal computers The accessory parallel cable comes with a 36 pin connector that is compatible with most parallel input printers In the event that another custom ca
30. hted B and C weightings are not required for compliance measurements The sound level meter function of the 897 meets the requirements of the Ameri can National Standards Institute ANSI Standard Specification S1 4 1983 for type S2A A weighted general purpose sound level meter 12 number 1 2 or 3 and should then freeze on this display If this occurs the Instrument must be returned for repair If these tests pass the Instrument will proceed to a rotating digits test This will cycle the display through all digits and all special annunciators This test will continue until either the TIME switch is pressed or the OFF RUN HOLD switch is switched to OFF If the TIME switch was pressed then the Instrument will continuously display the real time clock until the OFF RUN HOLD switch is switched to OFF 4 6 Setting The Dosimeter Parameters 4 6 1 The Dosimeter Parameters Criterion Level Lc Threshold Level Th Exchange Rate rt Leq Upper Limit H Unit ID Number Baud Rate and Time are easily programmable using the buttons located on the front panel 4 6 2 To Program the Dosimeter a Press and hold the Setup button see Figure 4 1 while switching the OFF RUN HOLD switch see Figure 4 1 from OFF to RUN b Select the parameter to be programmed by sequentially pressing the Setup button The order of the sequence is given in Table 4 3 Setup Mode Se qu
31. ly selected function 2 Control Switch LOCK A spline head screw is used to lock the control switch Locking the control switch together with the keyboard switch lockout feature provides protec tion against unauthorized tampering with control settings To activate the keyboard lockout slide the OFF RUN HOLD switch to HOLD then select the desired function and while still holding that function button down slide the OFF RUN HOLD switch to RUN NOTE The display will indicate four dashes for approximately five seconds At this point none of the touch switches will respond The keyboard may be reactivated by again sliding the OFF RUN HOLD switch to HOLD 3 Readout Display Four digit LCD display plus eight special functions units 4 SPL CAL When selected the Instrument functions as a sound level meter It reads the incoming sound pressure level on a real time basis and displays the A weight dB reading NOTE All dosimeter functions are suspended and the printouts will indicate HOLD during the time SPL is selected The SPL mode is also used to calibrate the Instrument when its microphone is inserted into the Model 887 Calibrator When the SPL CAL button is held down for three seconds until CAL is dis played the reading will be retained in memory along with the time date and position of the RANGE switch The latest two such readings are always stored
32. mation required for effective application of the 897 To understand the operation of the Instrument the following paragraphs discuss its function in relation to some of the subtleties of sound 3 1 Decibel Scale The human ear has a sound sensitivity range of greater than one million to one from the lowest level that can be detected to the highest level that can be toler ated without pain Because of the large ratio involved a linear meter scale marked in sound pressure units becomes impractical A scale based on logarithms called a decibel dB scale is used This scale expresses the ratio between the sound pressure level being measured with respect to a reference level and converts large ratios into smaller convenient numbers For example a million to one pres sure ratio can be compressed on a 0 to 120 dB scale The zero dB is the low limit reference which the human ear can barely perceive 3 2 Sound Level Meter A sound level meter is a measuring device used to determine the existing sound pressure level in a particular area A choice of frequency responses called A B and C weightings is typically provided which relate to the human ear response at low middle and high sound pressure levels The sound pressure level is ex pressed in dB A dB B or dB C where 0 dB 20 u Pascals the threshold of hearing and the A B and C define the weighting selected See Figure 3 1 NOTE All OSHA type sound level meters must be A weig
33. ments Failure to follow directions can result in a serious or fatal accident Technical Assistance SIMPSON ELECTRIC COMPANY offers assistance Monday through Friday 8 00 am to 4 30 pm Central Time To receive assistance contact Technical Sup port or Customer Service at 715 588 3311 Internet http www simpsonelectric com Warranty and Returns SIMPSON ELECTRIC COMPANY warrants each instrument and other articles manufactured by it to be free from defects in material and workmanship under normal use and service its obligation under this warranty being limited to making good at its factory or other article of equipment which shall within one 1 year after delivery of such instrument or other article of equipment to the original purchaser be returned intact to it or to one of its authorized service centers with transportation charges prepaid and which its examination shall disclose to its satisfaction to have been thus defective this warranty being expressly in lieu of all other warranties expressed or implied and of all other obligations or liabilities on its part and SIMPSON ELECTRIC COMPANY neither assumes nor autho rizes any other persons to assume for it any other liability in connection with the sales of its products This warranty shall not apply to any instrument or other article of equipment which shall have been repaired or altered outside the SIMPSON ELECTRIC COMPANY factory or authorized service centers nor which has been subj
34. nge switch changed during this minute HOLD is a number flag with a 1 signifying that the dosimeter was in RUN The Spreadsheet Output format is diagramed in Table 4 4 Note that each data item is separated by two spaces Table 4 4 Spreadsheet Output Format Actual Output Start lt sp gt lt sp gt 25 JAN 02 lt sp gt lt sp gt 00 00 lt CR gt lt LF gt CAL lt sp gt lt sp gt 0 0 lt sp gt dBA lt sp gt lt sp gt 00 00 lt sp gt lt sp gt 25 J AN 100 lt sp gt lt sp gt RANGE lt sp gt lt sp gt 80 130 lt sp gt lt sp gt dB lt CR gt lt LF gt DOSE lt sp gt lt sp gt 0 0 lt CR gt LF gt Leq lt sp gt lt sp gt 000 0 lt CR gt lt LF gt SPL Max lt sp gt lt sp gt 000 0 lt CR gt lt LF gt Le lt sp gt lt sp gt nn lt CR gt lt LF gt Th lt sp gt lt sp gt nn lt CR gt lt LF gt tt lt sp gt lt sp gt n lt CR gt lt LF gt ID lt sp gt lt sp gt nn lt CR gt lt LF gt Pk lt sp gt lt sp gt nnn lt CR gt lt LF gt ET lt sp gt lt sp gt nnnn lt CR gt lt LF gt HT lt sp gt lt sp gt nnn lt CR gt lt LF gt lt CR gt lt LF gt ET lt sp gt L lt sp gt lt sp gt MAX lt sp gt lt sp gt PEAKS lt sp gt lt sp gt RANGE lt sp gt lt sp gt HOLD lt CR gt LF gt 26 Description Starting date and time for this period The dBA reading time date and range switch setting for each of two possible calibration readings If the output data is only CAL lt sp gt lt sp gt lt CR gt lt LF gt then there is no calibration reading st
35. ored Also RANGE may be 50 100 The calculated dose in percentage The calculated 8 hour Time Weighted Average TWA in dBA The detected maximum SPL for this data period Criterion Level in dB Threshold in dB Exchange Rate in dB Unit 1 D Number Number of 140 dB peaks Elapsed Run Time in minutes Elapsed Hold Time in minutes 1 1 1 2 1 INTRODUCTION General Description The Simpson Model 897 is a combination dosimeter and Class S2A sound level meter It is a portable easy to operate accurate digital sound measurement in strument designed to meet the requirements of OSHA and international noise exposure regulations The 897 has a built in data logger with a 31 hour storage capability There are two standard output formats available with the data logger a Centronics compatible parallel printer and an RS 232C serial printer or computer The 897 also meets the requirements for the American National Standard Institute ANSI Specifica tion S1 4 1983 and IEC651 for class S2A sound level meters and American National Standard Institute ANSI Specification S1 25 1978 for Personal Noise Dosimeters Measuring continuous intermittent and impulsive noise in the standard range from 80 dBA to 130 dBA the 897 also offers a 50 to 100 dB range where lower sound level analysis is desired When used as a personal noise dosimeter the 897 may be worn in a shirt pocket or on a belt The microphone is provided with a clip which can
36. printer This setting has no effect on the parallel output data format This is factory set to option 1 Example Prn 6 Unit Identification Number id if multiple units are in service units or tens digit O through 9 thus the unit identification number may range from 00 to 99 This is factory set to unit 01 Example 7 RS 232 Baud Rate 0000 300 600 1200 2400 4800 or 9600 baud This has no effect on the parallel output It is factory set at 9600 8 Real Time Clock Set Time Set Minutes Unit Digit 00 00 9 through 9 Set Minutes Tens digit 00 00 0 through 5 Set Hours 00 00 Select 00 through 23 NOTE Based on 24 hour clock 23 30 9 Real Time Clock Set Date Set Day 1 N N number 01 through 31 Set Month 2 N N number 01 through 12 Set Year Unit Digit 3 N N number 0 through 9 Set Year Decade Digit 3 N N number 0 through 9 m 3 392 d Once all the parameter choices are made switch the OFF RUN HOLD switch see figure 4 1 to OFF for three seconds and all changes will be saved in the internal memory It is unnecessary to go through the entire sequence you may stop and switch the power OFF once all needed changes are made All of the above parameters with the exception of the Real Time 22 sition A keyboard switch lockout feature allows the 897 to be locked into any desired function Case Construction Anodized aluminum extrusion Physical
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