Extech 407750 Data Sheet

www.extech.com

4/24/08 - R1

Big backlit display and PC interface

With background sound absorber for machine noise measurements

Digital Sound Level Meter

Ordering Information:

407750....................Digital Sound Level Meter

407750-NIST ..........407750 with NIST Certificate

407752....................Windows compatible Software and Cable

407744....................94dB Sound Calibrator

Features:

• Auto/Manual ranging from 30 to 130dB in 6 ranges

• Meets ANSI and IEC Type 2 standards

• A and C selectable frequency weightings

• Fast and Slow selectable response times

• Background noise absorber mode for machine noise

measurements filters ambient noise

• Large 3 1/2 digit display with 0.1dB resolution

with backlighting and analog bargraph

• Electret condenser microphone provides 1.5dB accuracy

• Min/Max plus analog output and tripod mount

• Max Hold latches maximum value on display

• RS-232 interface for capturing data directly

on a PC, optional Windows

compatible software

• Complete with batteries and carrying case

Applications:

• Machine noise evaluation

• OSHA compliance testing

• Community noise measurement

• Noise ordinance

• PC interface for data collection

Specifications

Digital Display 3-1/2 digit (1999 count) Autorange LCD Bargraph Display 50dB display range (1dB resolution); Measurement Range 30 to 130dB (35 to 130dB for “C” weighting) Resolution 0.1dB Accuracy ±1.5 dB @ 94dB for a 1kHz sine wave Microphone Electret Condensor .24"(6mm dia.) type Frequency Weighting “A” and “C” type Time Response Slow/Fast Sampling time updates every 0.5seconds Measurement frequency range 31.5Hz to 8KHz Analog output AC: 0.707Vrms (full scale); DC: 10mVDC/dB Applicable Standards IEC 651 Type 2, ANSI S1.4 Type 2 Power Supply 9V battery , optional AC adaptor Dimensions 10 x 3.1 x 1.5"(256 x 80 x 38mm) Weight 8.5oz. (240g)