407740 Datasheet, PDF (2/4 Pages) Extech Instruments Corporation. – Digital Sound Level Meter

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 [phone] ext. 210 for authorization or visit our website at
www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an
RA number). A Return Authorization (RA) number must be issued before any product is
returned to Extech. The sender is responsible for shipping charges, freight, insurance
and proper packaging to prevent damage in transit. This warranty does not apply to
defects resulting from action of the user such as misuse, improper wiring, operation
outside of specification, improper maintenance or repair, or unauthorized modification.
Extech specifically disclaims any implied warranties or merchantability or fitness for a
specific purpose and will not be liable for any direct, indirect, incidental or consequential
damages. Extech's total liability is limited to repair or replacement of the product. The
warranty set forth above is inclusive and no other warranty, whether written or oral, is
expressed or implied.
Specifications
Display
2000 count multi-function LCD
Input Signal Range
‘A’ Weighting: 30 to 130dB
‘C’ Weighting: 30 to 130dB
Response Time
Fast: Response = 125ms; Slow: Response = 1s
Resolution
0.1 dB
Standards Compliance ANSI and IEC Type 2
Accuracy (at 23^o ± 5 ^o C) ±1.5dB at 1KHz (94dB)
Frequency
31.5 to 8,000Hz
Microphone
Electric condenser microphone, 0.5" (12.7mm)
Range Selector Switch 30 to 80dB, 50 to 100dB, 80 to 130dB
External Calibrator
Use Extech model 407744 or 407766
Analog Output Signal
AC: 0.5Vrms (full scale of selected range)
DC: 0.3 to 1.3VDC, 10mV/dB
Analog output impedance 600 ohms
Analog Output Terminal 3.5mm phone jack
Operating Temperature 32 °F to 122 °F (0 °C to 50 °C)
Operating Humidity
Max. 90% RH (0° to 35°C)
Power Supply
9V battery
Dimensions / Weight
10 x 2.8 x 1.1” (255 x 70 x 28mm) / 10 oz. (280 g)
Support Hotline [phone]
Tech support: Ext. 200; Email: [e-mail]
Repair/Returns: Ext. 210; Email: [e-mail]
Website: www.extech.com
2
Model 407740 version 1.6 8/05