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Summary of Contents for Extech Instruments 407768
- Page 1 User's Manual Digital Sound Level Meter Model 407768...
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Page 2: Specifications
Introduction Congratulations on your purchase of the Extech 407768 Sound Level Meter. This Auto Range Sound Level Meter meets ANSI and IEC Type II accuracy standards. Professional features include programmable Frequency Weighting and Time Response, Min/Max Memory, Max Hold, Analog output, and RS-232 PC Interface. Careful use of this meter will provide years of reliable service. - Page 3 The Sound Level meter should be calibrated before each use; an external sound level meter calibrator is required. Set the meter to the Manual range (50-100dB), FAST response and ‘A’ weighting before starting. 1. Place the external calibrator over the Sound Level Meter's microphone and turn the Calibrator on. 407768 Version 2.0 06/06...
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Page 4: Analog Output
The AC analog output transmits 0.5V AC rms full scale. The output impedance is 600Ω maximum. The mono 3.5mm mini-jack is located in the output/calibration compartment on the right side of the instrument. Use a phono plug (3.5mm mono) to connect to the output jack. 407768 Version 2.0 06/06... - Page 5 Instructions for use can be found on the included software Important Note on the Automatic Power OFF feature The 407768 Sound Level Meter has an AUTO POWER OFF feature that turns the meter off after approximately 10 minutes. This feature must be disabled before starting a datalogging session to avoid having the meter automatically shut off in the middle of a session.
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Page 6: Battery Replacement
Website: www.extech.com Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. - Page 7 Whisper (5') Threshold of hearing Frequency Weighting Graph Frequency Weighting 'A' Weighting 'C' Weighting 1000 10000 Frequency (Hz) more infor for Extech 407768 Phone: 01235 838 555 Email: cs@airconcern.co.uk Web. www.airconcern.co.uk Air Concern Ltd, Building 173 Curie Avenue Harvell Didcot, Oxfordshire...
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