Summary of Contents for Extech Instruments 407732
- Page 1 User's Guide Digital Sound Level Meter Model 407732 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 FAX 781.665.0780 - TestEquipmentDepot.com...
- Page 2 Congratulations on your purchase of the Extech 407732 Digital Sound Level Meter. The 407732 measures and displays sound pressure levels in dB from 35 to 130dB. The LCD is backlit for viewing readings in dimly lit areas. User selectable features include Frequency Weighting (‘A’...
- Page 3 Specifications Display 4-digit (4000 count) backlit LCD Display update rate 0.5 seconds Microphone 0.5” Electret condensor Measurement Bandwidth 31.5Hz to 8KHz Dynamic range 65dB Measurement Range 35 to 130dB (Low: 35 to 100; High: 65 to 130dB) Frequency weighting ‘A’ and ‘C’ (selectable) Accuracy / Resolution ±...
- Page 4 Do not store or operate the instrument in areas of high temperature or humidity. Keep meter and microphone dry. Avoid severe vibration. Remove the battery when the meter is to be stored for long periods of time. Model 407732 Version 1.4 June 2004...
- Page 5 The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. Press the backlight button to turn the backlight on. Press again to turn the backlight off. The backlight does not have an automatic power down function; judicious use will conserve battery life. Model 407732 Version 1.4 June 2004...
- Page 6 Calibration To calibrate the 407732, an external calibrator such as the Extech 407744 or the Extech 407766 is required in addition to a small screw-driver. Open the battery compartment and locate the two calibration potentiometers behind the 9V battery (see...
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Questions and answers
I just purchased the Extech Model 407732 and it will not calibrate on the high range, (display does not show 94.0 after adjusting the C (HI)
The Extech Model 407732 may not be calibrating on the high range if the 'A (HI)' calibration potentiometer is not properly adjusted. Calibration requires setting the meter to high range and adjusting this potentiometer to display 94.0 dB when using a 1kHz sine wave at 94dB from an external calibrator. If this step is not done correctly or if the calibrator is inaccurate, the high range calibration will fail.
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