Related Manuals for 3M 1200
Summary of Contents for 3M 1200
- Page 1 3M Personal Safety Division 1200/2200 Sound Level Meter Models Easy to Use Functionality 1200/2200 SLM User Manual...
- Page 2 Introduction The 1200 Sound Level Meter is a light weight easy-to-use Type 1 instrument and the 2200 is the Type 2 model. The purpose of this manual is to provide the user with the necessary information to operate the 1200/2200 Sound Level Meter as well as the remoteable versions of the 1200R/2200R.
-
Page 3: Table Of Contents
Data Recording/ DATALOGGING ..........12 5. Technical Information..............13 Principles of Operation ............13 Microphone ..................13 Weighting Characeristics ..............15 Tone Burst Response ..............15 6. Specifications ................18 7. Acccessories ...................21 8. 3M Customer Service ..............22 3M Warranty ................23 1200/2200 Sound Level Meter Operator’s Manual... -
Page 4: Introduction
Peaks or frequency weighted Leq. Applications include laboratory, industrial, community and military, measurement or analysis. The models 1200 and 2200 are easy-to-use hand held meters with an LCD display that provides a numerical readout. They are housed in an R.F. - Page 5 Introduction Figure 1b. Model 1200R/2200R Remote 1200/2200 Sound Level Meter Operator’s Manual...
-
Page 6: Genveral Overview
• LEQ - In the LEQ mode, the display indicates the integrated , or average level for the RUN period. If no RUN time has been accumu- lated the display shows dashes. 1200/2200 Sound Level Meter Operator’s Manual... -
Page 7: Fast/Slow/Peak/Imp Response Switch
• SLOW S - second time constant. See Figure ecay Rate d per second. • PEA microsecond time constant. • IMPULSE I - millisecond rise time constant, . second decay time constant. See Figure 1200/2200 Sound Level Meter Operator’s Manual... -
Page 8: A/C/Z Switch
(See Figure 9) 2.2.5 RANGE (dB) Switch: The displayed range of the model 1200 is 70 dB and is switchable between (30-100 dB),(50-120 dB), and (70-140 dB). After switching ranges allow several seconds for the meter electronics to stabilize. If a range change is necessary during a LEQ study, it is good practice to first set the meter to LEQ PAUSE, change range and then set the meter to RUN. -
Page 9: Output Jack
General Overview 2.3 Output Jack: The model 1200 provides an output jack on the bottom of the meter for measuring the weighted AC signal before the rms/log detector and the DC output of that detector. Both signals are real time, i.e. LEQ is not represented at the DC output. -
Page 10: Meter Integerity
23-299 7.2 V, ® 120 mAh) and an appropriate charger may be used with the 1200. The fact that nicad 9 V replacement cells typically operate at 7.2 V will be observed as shorter battery life (approximatelt 8 hours with Radio Shack ®... -
Page 11: Changing The Calibration Level
3.3 Calibration: The model 1200 may be calibrated in any range based on your calibrator’s output. There is no warm up period required, but for maximum accuracy calibration should be performed at the temperature of the environment to be measured. -
Page 12: Calibration Check
3. Turn to calibrator ON. If optional,set the frequency to 1 KHz. 4. Place the black adapter ring fully onto the microphone. 5. Set the model 1200 to SPL, PAUSE, SLOW or FAST, and A or C weighting. Set the measuring range so that the calibration level falls within it. - Page 13 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. 1200/2200 Sound Level Meter Operator’s Manual...
-
Page 14: Operation
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 ). -
Page 15: Windscreen Effects
The wind screen will reduce wind effects and will also help protect the microphone under dusty, oily, or humid conditions. Acoustic attenuation effects of the windscreen (WS-7) are shown in Figure 4. Figure 4. Effects of Windscreen 1200/2200 Sound Level Meter Operator’s Manual... -
Page 16: Data Recording/ Datalogging
Operation 4.4 Data Recording: The model 1200 has a DC output that is linearly related to the deciBel reading on the LCD display by 16.7mV/dB (1V/60dB). This output, capable of driving up to 100 feet of shielded or twisted pair cable, is intended for use with a chart recorder or data acquisition device that has a high input impedance. -
Page 17: Technical Information
Technical Information TECHNICAL INFORMATION 5.1 Principles of Operation: The Quest model 1200 uses low noise, low power analog and digital integrated circuirty to ensure long battery life, maximum stability, and superior reliability over a wide range of environmental conditions. Figure 5 is a block diagram of the model 1200/2200’s internal circuit operations. - Page 18 CAUTION: 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 1200/2200 Sound Level Meter Operator’s Manual...
-
Page 19: Input Buffer Circuitry
Figure 8. Frequency/Amplitude Limitations with Extension Cables 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 plastic collar below the preamp housing. -
Page 20: Weighting Characeristics
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 response setting. Figure 11. Fast Response 1200/2200 Sound Level Meter Operator’s Manual... - Page 21 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. 1200/2200 Sound Level Meter Operator’s Manual...
-
Page 22: Specifications
Specifications SPECIFICATIONS Standards: Model 1200 : Type 1 ; Model 2200 : Type 2 ANSI S1.43-1997, ANSI s1.4-1983(R1997), IEC 651-1979, IEC 804-1985 Display: 3 1/2 Digit Liquid Crystal Display. Level display indicates to 0.1 dB resolution. An enunciator is included for Battery Check. - Page 23 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...
- Page 24 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...
- Page 25 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 cable (50 foot length) 1200/2200 Sound Level Meter Operator’s Manual...
-
Page 26: Customer Service
Customer Service 3M Customer Service Should your 3M Quest equipment need to be returned for repair or for recalibration, please contact the service department at the following number or access the online form via the website. For technical issues, please contact Technical Support. -
Page 27: Warranty
WARRANTY 3M Warranty 3M warrants our instruments to be free from defects in materials and workmanship for one year under normal conditions of use and service. For United States customers, we will replace or repair (our option) defective instruments at no charge, excluding batteries, abuse, misuse, alterations, physical damage, or instruments previously repaired by other than 3M. - Page 28 The 3M Detection brand of instrumentation is used by safety and industrial hygiene professionals to help comply with applicable occupational standards and regulations.