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Extech Instruments 407732 User Manual

Extech Instruments 407732
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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
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Extech Instruments 407732 Specifications

General IconGeneral
Model407732
TypeSound Level Meter
Measurement Range35 to 130 dB
Frequency Range31.5 Hz to 8 kHz
WeightingA and C
Power Supply9V battery
Resolution0.1 dB
Data LoggingYes
PC InterfaceRS-232
CategorySound Level Meter
Time WeightingFast/Slow
DisplayLCD
Microphone1/2 inch electret condenser
Dimensions230 x 60 x 34 mm
Weight270 g

Summary

Introduction and Safety

Safety Precautions

Read safety information carefully before operating or servicing the meter.

Environmental Conditions

Specifies altitude, humidity, and operating temperature limits for the meter.

Maintenance and Cleaning Guidelines

Provides instructions for meter servicing and case cleaning.

Specifications

Meter Description and Measurement Considerations

Operation of the Sound Level Meter

'A' and 'C' Frequency Weighting

Selects meter frequency response similar to human ear ('A') or flatter ('C').

'FAST' and 'SLOW' Response Time

Choose response time for capturing peaks (FAST) or averaging levels (SLOW).

'Hi' and 'Lo' Range Selections

Selects measurement range (35-100dB or 65-130dB) for optimal readings.

MAX HOLD Function

Freezes the display to show the highest reading detected since activation.

DATA HOLD Function

Freezes the current displayed reading; MAX and HOLD icons appear.

Backlight Button

Activates LCD backlighting for better visibility in dim conditions.

Calibration and Battery Replacement

Battery Replacement Procedure

Instructions for replacing the 9V battery when the low battery indicator appears.

Typical A-Weighted Sound Levels

Chart showing common sound levels measured in dBA for reference.