3M 1200 User Manual Download

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3M Personal Safety Division

1200/2200 Sound Level Meter Models

Functionality

1200/2200 SLM User Manual

Easy to Use

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Summary of Contents for 1200

Page 1: ...3M Personal Safety Division 1200 2200 Sound Level Meter Models Functionality 1200 2200 SLM User Manual Easy to Use ...

Page 2: ...not all inclusive and cannot cover all unique situations In addition no warranties are contained in this manual except as described under the warranty policy section Note Due to the ATEX Directive in Europe all references in this document to Ex or EEx for intrinsic safety approvals should be disregarded effective 7 1 03 within the member countries of the European Union EU At this time this product...

Page 3: ...tegerity 7 3 1 Power On Battery Check 7 3 1 1 Battery Replacement 7 3 2 Setup 7 3 2 1 Changing the Exchange Rate 7 3 2 2 Changing the Calibration Level 7 3 3 Calibration 8 3 3 1 Calibration Check 8 3 4 Switch Settings to Select Measurements 9 4 Operation 10 4 1 Meter Microphone Placement 10 4 2 Background Noise 10 4 3 Windscreen Effects 11 4 4 Data Recording DATALOGGING 12 5 Technical Information ...

Page 4: ... easy to use hand held meters with an LCD display that provides a numerical readout They are housed in an R F shielded injection molded case The meter is operated with simple slide switches An output jack on the bottom of the meter is provided for con necting to peripheral devices such as chart recorders oscilloscopes audio recorders etc The model 1200 provides Type 1 accuracy for precision measur...

Page 5: ...ual D o er 1200 2200 Sound Level Meter Operator s Manual 2 Introduction Figure 1b Model 1200R 2200R Remote ...

Page 6: ...es the meter will display the appropriate value for the previ ous RUN or if no run time has been accumulated The meter automatically updates the current reading at a rate of once per second RUN Causes the meter to begin calculating the frequency weighted equivalent continuous SPL All SPL measurements are inte grated into a single number representing the equivalent SPL for the entire measurement pe...

Page 7: ...he display shows the time that the circuitry has been overloaded as a percent of RUN TIME If no RUN time has been accumulated the display shows dashes UR If an Under Range indicator designated as a minus symbol appears on the display then this indicates the Sound Pressure level is below the measuring range set on the Sound Level Meter 2 2 3 FAST SLOW PEAK IMP Response Switch The Response Switch co...

Page 8: ...er to LEQ PAUSE change range and then set the meter to RUN This will avoid integrating any handling or switching noise into the LEQ measurement 2 2 6 RESET Button This button is used primarily to clear data from the memory of the instrument When pressed the display will begin to count down from 02 If the button is pressed and held the display will count down 02 01 When the dashes are displayed the...

Page 9: ...nnection to low impedance loads will require correction for the 1 Kohm impedance of these outputs and will also decrease battery life The output jack takes a 3 5mm stereo plug See Figure 2 Output Jack Connections 2 3 1 DC Output Function The SPL or PEAK level over the range selected is linearly represented by a DC output The output changes 16 7mV dB or 1V 60dB This output is provided for connectin...

Page 10: ... observed as shorter battery life approximatelt 8 hours with Radio Shack 23 299 At the appearance of the LOBAT indicator the nicad battery must be recharged NiMH Nickel Metal Hydride batteries are NOT recommended This is due to the excessive discharge of the typical NiMH cell prior to the voltage dropping low enough to activate the LOBAT indicator 3 2 Setup NOTE There may be times when it is neces...

Page 11: ...ator s output When the desired calibration level is displayed press and hold both the RESET and CAL buttons until dashes appear on the display The new calibration level is now stored in the instruments memory and will not have to be changed again unless an alternate calibrator is used 3 3 Calibration The model 1200 may be calibrated in any range based on your calibrator s output There is no warm u...

Page 12: ...es will appear and then disappear one at a time as the meter calibrates A final message of PAS or BAD will appear in the display If BAD review steps one though five 3 3 1 Calibration Check It is a good idea to check calibration after use To do so perform the previous steps 1 through 5 Observe the meter display it should read the calibrator level 0 5 dB If out of tolerance run calibration procedure...

Page 13: ...ity MIN HOLD MIN A C or Z Holds MIN until RESET RUN RESPONSE of or Meter SETTING is FAST SLOW OR changed IMPULSE During an LEQ RUN weighting response and range switch settings can not be changed If these switches are changed the LEQ measurement will stop reset and start again ...

Page 14: ...elatively open area to minimize reflections from the body or other large reflective structures Avoid placement against a wall or in a corner A threaded bushing on the back will accept a standard 1 4 20 tripod fitting The microphone cartridge used on the models 1200 and 2200 is a free field microphone Point it directly at the noise source 0 degrees Random incidence measurements may be taken with th...

Page 15: ...e subtracted from the measurement The correct measurement is therefore 51dB 1 3dB 49 7dB Figure 3 Effects of Backgound Noise 4 3 Wind Screen Effects To prevent measurement errors caused by wind blowing across the micro phone the use of a windscreen is recommended The wind screen will reduce wind effects and will also help protect the microphone under dusty oily or humid conditions Acoustic attenua...

Page 16: ...wisted pair cable is intended for use with a chart recorder or data acquisition device that has a high input impedance The output impedance is 1000 ohms Recorder input impedance may cause loading of this output which should be taken into account Multiplication factors for the above numbers are given below for various recorder input impedances INPUT IMPEDANCE MULTIPLY DC VOLTAGE OF RECORDER BY 10 K...

Page 17: ...polarized electret Type 1 microphone Quest P N 059 523 BK 4936 The impedance of this microphone is approximately 12pF The microphone screws directly onto either the remoteable preamp or the fixed microphone extension of the meter case A typical response curve for the Type 2 microphone is shown in Figure 6 The model 2200 is designed to accept a prepolarized electret Type 2 microphone Quest P N 056 ...

Page 18: ...UTION When installing or removing the microphone do not unscrew the protective grid Do not touch the metal foil microphone diaphragm under this grid as permanent damage may result Figure 6 Typical microphone response Type 1 Figure 7 Typical microphone response Type 2 12 5 5 ...

Page 19: ... 0 1 dB with the insertion of either of these cables Therefore there is no need to recalibrate when the cable is attached 5 4 Input Buffer Circuitry The high impedance input circuitry of the 1200 will accept up to a 2 0 volt RMS signal With the microphone and preamp removed other transducer devices may be connected to give a dB readout on the meter To remove the preamplifier unscrew the black plas...

Page 20: ...f the human ear and is used for most industrial and community noise mea surements Generally C weighting is used for measuring noise reduction in hearing protectors and for other scientific purposes Z is a linear response from 5 Hz to 20 kHz Figure 10 A C Z Weighting 5 6 Tone Burst Response Figures 11 12 and 13 show how the meter responds to a sinewave input of varied pulse duration for each respon...

Page 21: ...s follows FAST 34 7 dB per second SLOW 4 35 dB per second IMPULSE 2 9 dB per second PEAK measurements have a rise time constant of 50uS The dis played value is the highest peak occurring prior to a reset Resets occur every second in PAUSE When the meter is in RUN a manual reset is required Figure 12 Slow Response Figure 13 Impulse Response ...

Page 22: ...e 34 to 140 dBA SPL 43 to 143 dBA PEAK 37 to 140 dBC SPL 43 to 143 dBC PEAK 42 to 140 dBZ SPL 43 to 143 dBZ PEAK Pulse Range 63 dB Electrical Noise Floor 26 dBA typ 30dBC typ 35 dBZ typ Frequency Weighting Networks A C and Z Meter Repsonse Fast Slow Impulse or Peak 50uS rise time constant Microphone Removable 52 inch 13 5mm prepolarized condenser electret microphone Model 1200 Type 1 accuracy P N ...

Page 23: ...ement Accuracy Within 0 5 dB at 23 C Within 1 0 dB over the temperature range of 10 C to 50 C Level Range Accuracy 0 5dB from 31 5 8000 Hz 1200 1 0dB from 20 12500 Hz 1200 0 7dB from 31 5 8000 Hz 2200 Temperature Range Operation 10 C to 50 C Storage less batteries 20 C to 60 C Operating Humidity 0 to 95 relative humidity non condensing Effect of Electromagnetic Fields Negligible Effect of Electros...

Page 24: ...s Battery Life 9 Volt Alkaline approximately 25 hours 9 Volt NICAD approximately 8 hours Size 2200 2 8 x 7 6 x 1 3 inches including mic 1200 2 8 x 9 7 x 1 3 inches including mic Weight 2200 10 3 oz 293 g including battery 1200 10 8 oz 306 g including battery 12 7 ...

Page 25: ...eter microphone for Quest CA series calibrators 59 344 WS 7 Windscreen for 0 50 inch microphone pkg of 3 59 45 Tripod Larger 59 46 Tripod Smaller 59 703 Input Adapter Female BNC jack to 1 2 microphone thread with 18pF capacitance Allows direct electrical signal input to the meter 59 899 ICM 2 microphone cable 2 foot length 59 733 ICM 10 microphone cable 10 foot length 59 734 ICM 50 microphone cabl...

Page 26: ...ours 8 00 am to 5 00 pm US Central Email 3Mdetectionmail mmm com Website www 3M com detection International customers Contact your local factory authorized distributor from whom the product was purchased You may obtain the name and contact information of your local factory authorized distributor from 3M by using the email phone or fax information explained under 3M Customer Service Calibration The...

Page 27: ...hart recorders may have shorter or longer warranty periods This warranty states our total obligation in place of any other warranties expressed plied Our warranty does not include any liability or obligation directly resulting from any defective instrument or product or any associated damages injuries or property loss including loss of use or measurement data For warranty outside the United States...

Page 28: ...ses The 3M Detection brand of instrumentation is used by safety and industrial hygiene professionals to help comply with applicable occupational standards and regulations About 3M Personal Safety 3M offers a comprehensive diverse portfolio of Personal Safety solutions providing respiratory protection hearing protection fall protection reflective materials for high visibility protective clothing pr...

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