Related Manuals for 3M 1100 SLM
Summary of Contents for 3M 1100 SLM
- Page 1 3M Occupational Health & Environmental Safety Division 1100/2100 Sound Level Meter Models Easy to Use Functionality 1100/2100 SLM User Manual...
- Page 2 Copyright This document is copyrighted by Quest Technologies, a 3M company. Permission is hereby granted to copy and distribute this manual provided that this Copyright Page is included. This grant does not include permission to modify the manual’s text or illustrations in any way.
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Page 3: Table Of Contents
Table of Contents Table of contents Introduction ........................1 1100/2100 Models ......................1 Getting Started ......................... 3 The Display ........................3 Meter Controls ........................3 OFF/SPL/MAX Switch ..................... 3 "F" (FAST) / "S" (SLOW) RESPONSE Switch ..............3 Overload Detection and Underrange .................. 5 Output Jack ........................ - Page 4 Contents Table of Weighting Characteristics ....................14 Internal Electrical Noise ....................14 Tone Burst Response ....................... 15 Specifications ......................... 16 Accessories ........................18 Quest Service ......................... 19 Contacting Quest Technologies ..................19 International customers ....................19 Figures Figure 1-1: Sound Level Meter 2100 model ..............1 Figure 1-2: Model 1100R/2100R ..................2 Keypad/Control switches identified ...............4 Figure 2:...
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Page 5: Introduction
Introduction Introduction 1100/2100 Models Introduction The Quest models 1100 and 2100 Sound Level Meters and their remote versions (1100R/2100R) measure frequency weighted and time averaged sound pressure level and are shown in Figures l-1 and 1-2. Applications include laboratory, industrial, community, military, and audiometric measurement or analysis. 1100/2100 Models The models 1100 and 2100 are easy-to-use hand held meters with an LCD display that provides a numerical readout. -
Page 6: Figure 1-2: Model 1100R/2100R
Introduction 1100/2100 Models Figure 1-2: Model 1100R/2100R 056-652, Rev.D 1100/2100 SLM models... -
Page 7: Getting Started
Getting Started Getting Started The Display Getting Started The Display The LCD display provides a numeric readout of sound level in 0.1 dB increments along with a LOBAT (low battery) indicator. In the SPL mode the numeric display provides a reading of the maximum sound pressure level measured during the previous second. -
Page 8: Figure 2: Keypad/Control Switches Identified
Getting Started Meter Controls WEIGHTING A/C Switch The WEIGHTING switch controls the frequency response of the meter. Weightings A or C may be selected. See “Microphone preamplifier”, page 13 Weighting Characteristics, for further information. RANGE (dB) Switch The displayed range of the model 1100 is 70 dB and is switchable between 30-100 dB, 50-120 dB, and 70-140 dB. -
Page 9: Overload Detection And Underrange
Getting Started Overload Detection and Underrange Overload Detection and Underrange The Overload Indicator is displayed whenever the incoming signal saturates (overloads) the circuitry. It is the + sign on the left side of the display. If the overload indicator is on while taking measurements in a Low range, increasing the dB Range switch should cause the overload to disappear. -
Page 10: Checking The Battery
Battery & Calibrate Checking the battery Battery Check Checking the battery Battery Check At any time other than initial turn on, if the LOBAT indicator on the display is activated the user must replace the battery. A 9 volt Alkaline battery is recommended for best performance. -
Page 11: Calibration
Checking the battery Calibration NOTE: If the RESET and CAL buttons are continuously held down after the dashes appear, the unit will interpret this as a command to exit calibration level set mode and exit without changing the calibration level. To edit the level, use the RESET key to increase the value and the CAL key to decrease the value. -
Page 12: Operating And Measurements
Operating & Measurements Operating and Measurements Operation Operating and Measurements Operation Before taking measurements with the model 1100, there is a series of quick checks and considerations that should be performed or noted. After switching the unit ON, check for a LOBAT indication on the display, replace battery if necessary. -
Page 13: Background Noise Example
Operating and Measurements Background Noise Example Background Noise Example For example, if the background noise is 45 dB and the sound of interest measures 51 dB, the difference between measurement and background noise is 6 dB. From Figure 4, for a 6 dB difference, 1.3 dB should be subtracted from the measurement. -
Page 14: Chart Recording/Datalogging
Technical Information Operating and Measurements Chart Recording/Datalogging Chart Recording/Datalogging The model 1100 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 0 to 1 volt DC input chart recorder or data acquisition device that has a high input impedance. -
Page 15: Technical Information
Technical Information Principles of Operation Technical Information Principles of Operation The Quest model 1100 uses low noise, low power analog and digital integrated circuitry to ensure long battery life, maximum stability, and superior reliability over a wide range of environmental conditions. Figure 6 is a block diagram of the model 1100/2100's internal circuit operations. -
Page 16: Microphone
Technical Information Microphone Microphone The model 1100 is designed to accept a pre-polarized (electret) type 1 microphone Quest part number #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 1 microphone is shown in Figure 7. -
Page 17: Microphone Preamplifier Extension Cables
Technical Information Microphone preamplifier extension cables Microphone preamplifier extension cables On 1100R (Remote) units the preamplifier is removable by unscrewing the black plastic collar below the preamplifier housing. The 1100 will drive up to a 10 foot cable with minimal loss. Quest offers the following lengths of remote cable for use with the 1100: •... -
Page 18: Weighting Characteristics
Technical Information Weighting Characteristics Weighting Characteristics The weighting characteristics (frequency response) for A and C are shown in Figure 11. The "A" weighting response emulates the low level response of the human ear and is used for most industrial and community noise measurements. Generally, "C"... -
Page 19: Tone Burst Response
Technical Information Tone Burst Response Tone Burst Response Figures 12 and 13 show the meter response to a sine-wave input of various pulse durations for Fast and Slow settings. Figure 12: Fast response Figure 13: Slow response Nominal decay times for each time response setting are as follows: •... -
Page 20: Specifications
Specifications Specifications Tone Burst Response Specifications Standards: Model 1100 : Type 1 ; Model 2100 : Type 2 ANSI S1.4-1983(R1997), IEC 651-1979 EN60651 Display: 3 1/2 Digit Liquid Crystal Display. Level display indicates to 0.1 dB resolution. Annunciator is included for Battery Check. - Page 21 Technical InformationSpecifications Tone Burst Response Crest Factor: Greater than 26dB (crest factor = 20) if peak of signal does not cause an overload. Crest factor is sufficient to handle the signal if the overload indicator does not light. Operating Temperature Range: -10°C to +50°C Storage...
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Page 22: Accessories
Accessories Technical InformationAccessories Tone Burst Response Accessories 58-928 Calibrator Adapter for 0.52 inch diameter microphone for use with Quest "CA-" series calibrators 56-990 Calibrator Adapter for 0.52 inch diameter microphone for use with Quest "QC-" series calibrators 59-344 WS-7 Windscreen for 0.52 inch microphone (pkg. of 3) 59- 045 Tripod (Larger) 59-046 Tripod (Smaller) 59-703 Input Adapter - Female BNC jack to 1/2"... -
Page 23: Quest Service
Service & Warranty Quest Service Contacting Quest Service Contacting Quest Technologies Should your Quest Technologies 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 24 Quest Technologies, a 3M company, is a world class manufacturer and leader in the field of occupational safety, industrial hygiene and environmental instrumentation. Quest prod- ucts are used in more than 80 countries worldwide. Quest has a strong reputation of rugged,...