Gracey & Associates Hire

Noise and Vibration at Work

Bruel & Kjaer precision meter with both A and C weightings plus Fast, Slow and Impulse time constants. Measures Peak, Lmax, Lmin, Leq, SEL and 3 Ln values. Levels may be logged from 1 second up to hourly intervals. Large memory. Short term and long term dose measurements. Delivered with a 4188 microphone and windshield in a carrying case - ideal for factory surveys B&K 2236 details and environmental accessories

Top of the range Class 1 Mediator for factory noise measurements and includes the following modules - BZ 7123 - Frequency Analysis Software BZ 7124 - Logging SLM Software BZ 7125 - Enhanced SLM Software BZ 7126 - Basic SLM software. Delivered with a 4188 microphone and windshield in a carrying case B&K 2238 environmental kits and more details

Bruel & Kjaer's state-of-the-art real time analyser with many features - 120 dB dynamic range - no need to change range. Simultaneous A, C and Z weighted levels with F, S and I Time Constants Octave and 1/3 octave band measurements from 6.3 Hz to 20 kHz Logging - level vs time histories Statistics - Lns + Voice and text annotation of measurements, pre-set time start/stop, back-erase, context-sensitive built-in help, data storage internal and plug-in cards, USB computer interface, free-field & diffuse correction, display optimised for day, night indoor and outdoor use BZ 7226 Sound Recording Option which enables simultaneous recording of the measured sound levels, so you can identify and document the individual sound sources. The audio data is recorded to a 1GB SD card for subsequent archiving and inclusion in your report. B&K 2250 details and environmental options For measurements up to 165 dB add a GRAS 40BF 1/4" microphone

Frequency analysis based on the Fast Fourier Transform [FFT] algorithm is the tool of choice for measurement and diagnostics of machinery noise and vibration. The frequency 'profile' of a machine is its fingerprint, revealing its sources of noise and vibration and their paths to the measurement position. The 2250 with the BZ 7230 FFT software has many narrow band features :- Analysis of sound or vibration. Real time operation [no loss of data] up to 20 kHz. 100 up to 6400 lines giving a resolution down to 16 mHz Linear and exponential averaging Signal capture and recording Engineering units SI metric and UK imperial units Acceleration, velocity, displacement ....... Plus Max hold, spectrum overlay, zoom, tachometer function, trigger, transient and continuous signals, RMS, Pwr, PSD, ESD, Peak, P-P ...... etc., software also included for analysis, reporting and downloading to a PC for more details

Noise can be described as tonal if it contains a noticeable or discrete, continuous note. This may include noises such as hums, hiss, screeches, drones, etc., and any such subjective description is open to discussion and contradiction when 'just' reported. ISO 1996-2 (2007) Annex C, "Objective method for assessing the audibility of tones in noise reference method", provides measurement procedures to be used to verify the audibility of tones and to quantify them. The BZ 7231 Tone Assessment Option for Type 2250 Hand-held Analyzers running FFT Analysis Software BZ 7230, offers a quick and easy 'in-the-field' objective assessment of tonal noise components, in compliance with ISO 1996 assessments. The facility to carry out the ISO Standard tone assessment on the analyzer with an immediate result offers objective feedback about whether you have 'found the problem' or need to take further measurements. All our 2250 2250 meters also include the BZ 7226 Sound Recording Option enabling simultaneous recording of the measured sound levels, so you can identify and document the individual sound sources. The audio data is recorded to a 1GB SD card for subsequent archiving and inclusion in your report. B&K 2250 FFT and TA details

Hand-held real time meter with the BZ 7210 Sound Analysis software, PC compatible filing system and large memory. The 2260 Investigator is a Class 1 sound level meter with real-time displays of frequency analysis, 1/3-octave spectra and statistical distributions. Ideal for environmental surveys and gathering field data for further analysis more details and environmental options

Modular real time sound analyser with all the features of the 2260B above but includes the BZ 7210 Enhanced Sound Analysis Software B&K 2260F details and environmental kits

Bruel & Kjaer battery operated meter with charge amplifier input, for measuring Acceleration Velocity and Displacement in both Imperial & Metric units - RMS and TRUE PEAK-PEAK. Ideal, for use, as a front-end, signal conditioning unit into FFT or other analysers, DAT recorders etc. It also includes a 160 Hz reference signal to calibrate complete measurement systems more details

Bruel & Kjaer hand held, battery operated meter for measuring the hand-arm vibration in the workplace. Calculates the daily exposure levels based on short term measurements. Simultaneous RMS & Peak measurements with linear and hand-arm weightings. Meets BS EN ISO 5349 and 8041 Standard requirements. Also suitable for general purpose vibration measurements in the range 0.1 ms-2 to 3000 ms-2 Delivered with a 4505 accelerometer, a DB 3585 mounting bracket and nylon fixing ties. Ideal for vibration white finger surveys more details and accessories

Hand-held system for measurement and evaluation of human vibration. In accordance with BS EN ISO 8041-2005, BS EN ISO 5349-2 and BS ISO 2631-1 For the measurement of:- hand-arm vibration - HAVS. vibration white finger - VWF. whole body vibration. Includes a 3-axis accelerometer, hand-arm attachments, charger and download software. To measure whole body vibration add the 4515-B Seat Pad. more details and accessories

Easy to use personal dose meter - meets BS EN 60651 and BS EN 60804 type 2. Measures % dose, Projected % dose for specified period Selectable profiles with 43,200 data point storage = 1 second profiles for 12 hours. Preset start / stop. + Cumulative Leq, Linear Peak maximum, Lepd etc., A windshield and 1/4" calibration coupler is included CEL 460 details

Hand held, battery operated, real time octave and third octave sound analyser - 12 Hz to 20 kHz. Measures and calculates the commonly required, time averaged parameters and statistical data. Large memory. Three modes of operation - Real time sound analyser mode with snapshot storage - broad band measurement of SPL, Max, Min, Leq, ILeq, Lavg, Lin Peak, C Peak plus 1/3 or octave spectra of SPL, Max and Leq. Event analyser mode either timed or by threshold with delays up to 30 seconds - broad band and spectra measurements of Max, Duration, SEL, Event Leq, Lin Peak, C Peak and 1 sec Max. Environmental mode with 5 Lns and measurement periods selectable in steps from 0.5 s to 60 min - broad band Max, Min, period SEL, Leq, ILeq, Lavg, Lin Peak, C Peak plus 1/3 or octave spectra Max and Leq as well as the 5 Ln values. CEL 593 details

Twin channel FFT - Fast Fourier Transform analyser ideal for vibration analysis and acoustic source definition if two or more discrete tones are in the same 1/3-octave band. DC - 40 kHz in 10 ranges with engineering units and zoom FFT with up to 1600 lines resolution Memory card and RS-232 output to a serial printer, PC etc., Frequency, Time Domain, Transfer Function measurements etc. DC or AC coupled voltage inputs, plus IPC accelerometer connection - both channels Small battery operated. Plug the DI-2200 into the analogue output of a suitable sound level meter or connect one or more accelerometers into the analyser IPC inputs - see the Metra KS76 accelerometers. more details

Designed specifically for the measurement of Hand Arm and Whole Body Vibration. Simultaneous 3-channel measurements of the X, Y and Z vibration levels plus the vector sum, using the relevant weighting curves. Conforms to BS ISO 2631, 5349, 6841, and 8041 standards. The Larson Davis HVM100 includes a SEN 020 tri-axial accelerometer with mechanical adaptors for hand-arm vibration measurements. more details - see also the B&K 2537, B&K 4447 and Vibrock V-901 and Nor 110 below.

Basic sound level meter, ideally suited to measuring factory noise levels either hand held or on a tripod for noise dose over the working day. Simultaneously measures the SPL, Leq., SEL and Max Hold levels. Measurement times are selectable from 1 second to 24 hours. Four digit displays AC + DC outputs Nor 102 details

A comprehensive instrument suitable for both survey and detailed factory or office noise and vibration measurements Real time frequency analysis down to 1 Hz plus whole body and hand-arm networks also built in, therefore ideal for vibration measurements, if an accelerometer is included Measures SPL (Fast, Slow, Impulse, Peak+ and Peak-) simultaneously + Leq, SEL and all the Ln values. A, C, Linear and Flat weightings. Octaves, 1/3-octave and partial octave analysis. Graphical & numerical displays. Level, Frequency and Time modes. Results automatically stored in a large non volatile memory and or transferred to a PC. more details on the Nor 110 plus noise and vibration accessories

Gracey & Associates mounting kit for fixing an accelerometer to a hand tool etc for measurements in all three planes. Includes a B&K DB 3585 mount with fixing ties + a B&K JJ 2615 adaptor to converter suitable sound level meter preamplifiers inputs to take accelerometer cable. more details For a simple dedicated hand/arm vibration meter see the B&K 2537

A very popular class 1 instrument - ideal for factory noise surveys. Displays octave band and A-weighted levels in real time, graphically and numerically SPL, Lmax, Leq, SEL. Non volatile memory for 1,500 spectra. Range 25 to 130 dBA with selectable measurement periods from 1 second to 24 hours, so level v time histories throughout the working day, with frequency content, dose etc., may be made with both Fast and Slow time constants. Battery or mains operation Nor 114 details

For precision measurements of - Occupational Noise Assessments, Sound Power Measurements Machinery Labelling. Includes Fast, Slow and Impulsive measurements of Leq, Lmax, Lmin, SEL, Peak plus Ln values, memory with date and time etc. Parallel A & C weighted measurements. Graphical and numerical display. L(t) level recorder type traces. Store and repeat measurement features. Includes precision microphone, windshield and a mains unit. In the event of a 'flat' battery the last thing the Nor 116 does is to store the current results in the non volatile memory Nor 116 details.

Norsonic Real Time Class 1 Analyser with parallel A and C (or Z) networks. Measurement periods from a second up to several days with level recorder - time mode option. Filters - 1/1 and 1/3 octave Statistics - Ln values, all bands, all networks Level v time - electronic level recorder Memory Trigger more details and options

Norsonic 118 Real Time Precision Sound Analyser - as above + Multi-spectra Noise generator Reverberation calculations Sound power and other additional options Nor 118 + details

Features. Fast, Slow and Impulsive measurements of Leq, Lmax, Lmin, SEL, Peak plus Ln values. Parallel A and C measurements with graphical and numerical displays. Filters - 1/1 and 1/3 octave Statistics - Ln values, all bands, all networks Level v time - electronic level recorder Measurement periods from a second up to several days with level recorder - time mode option. Memory - internal 'flash' and SD card more 140 details, options and environmental kits

Vibrock single channel, 3-axis vibration analyser for continuous level recording or logging vibration events Triaxial transducer for simultaneous 3-axis recording Measures velocity (PPV), displacement and acceleration LCD display of current levels and maximum levels Up to 300 events or several weeks continuous recording may be stored Uses 2 ordinary alkaline D cells which will power the system for up 20 days. Robust, weatherproof and lightweight V 901 details

Dual channel, 3-axis vibration analyser for continuous level recording or logging vibration events plus a VDV transducer to record the vibration dose levels. Specifications for the velocity, displacement and acceleration transducer as above. When using the VDV transducer to measure vibration dose, the instrument complies with BS 6472 and BS 7482 part 3 Robust, weatherproof and lightweight V 901 details