Table of Contents
Advertisement
Quick Links
User's Guide
Digital Sound Level Meter
Model 407738
Introduction
Congratulations on your purchase of the Extech 407738 Digital Sound Level Meter.
The 407738 measures and displays sound pressure levels in dB (decibels) from 26 to
130dB in six measurement ranges. The microphone can be removed and remotely
stationed for convenience. In addition to the LCD numerical displays, a bargraph is
included for quick and easy viewing of sound level changes. Features include selectable
Frequency Weighting ('A' and 'C'), selectable Response Time (Fast and Slow), Max
Hold, and a 99 reading storage utility.
Careful use of this meter will provide years of reliable service.
With Memory
Advertisement
Table of Contents
Related Manuals for Extech Instruments 407738
Summary of Contents for Extech Instruments 407738
- Page 1 Introduction Congratulations on your purchase of the Extech 407738 Digital Sound Level Meter. The 407738 measures and displays sound pressure levels in dB (decibels) from 26 to 130dB in six measurement ranges. The microphone can be removed and remotely stationed for convenience. In addition to the LCD numerical displays, a bargraph is included for quick and easy viewing of sound level changes.
-
Page 2: Specifications
Technical support: Extension 200; E-mail: support@extech.com Repair & Returns: Extension 210; E-mail: repair@extech.com Product specifications subject to change without notice For the latest version of this User’s Guide, Software updates, and other up-to-the-minute product information, visit our website: www.extech.com Model 407738 Version 2.2 September 2005... -
Page 3: Meter Description
5. CAL potentiometer: For calibration. Optional calibrator required. 6. External 9VDC power adaptor 7. DC/AC analog output: Retransmission of sound level measurement for chart recorder or other datalogger 8. Tripod Mount 9. Battery compartment With Memory Model 407738 Version 2.2 September 2005... -
Page 4: Display Description
12. Memory FULL indicator 13. Memory indicator 14. READ memory indicator 15. Address for stored reading 16. Sound level unit of measure (decibel) 17. Maximum sound level reading 18. Minimum sound level reading 19. Sound pressure level Model 407738 Version 2.2 September 2005... -
Page 5: Power Supply
125ms. MAX / MIN Operation The Model 407738 stores the highest (MAX) and lowest (MIN) readings in its memory. The stored MAX and MIN values are continually updated as new MAX and MIN values are encountered. -
Page 6: Storing And Recalling Readings
2. Press and hold the MEM button while turning the meter ON. 3. When the ‘CLr’ (clear) display icon appears, release the MEM button. 4. All of the readings that were stored in memory are now erased. Model 407738 Version 2.2 September 2005... -
Page 7: Analog Outputs
• Output impedance: 5KΩ approx. Calibration To calibrate the 407738, an external calibrator (such as the Extech 407744 or the Extech 407766) is required in addition to a small screw-driver. Turn the meter ON Put the meter in the ‘A’ weighting mode Put the meter in the ‘SLOW’... -
Page 8: Warranty
Threshold of hearing 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 to 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.
Need help?
Do you have a question about the 407738 and is the answer not in the manual?
Questions and answers