รายละเอียด:
เครื่องวัดเสียง Dual Range Sound Level Meter Two measuring ranges: 35 to 90dB (Low) and 75 to 130dB (High)
407736: Dual Range Sound Level Meter ยี่ห้อ Extech, USA
Sound level meter with ±1.5dB accuracy meets Type 2 standards
This Sound Level Meter measures from 35 to 130dB with a 1.5dB accuracy and meets ANSI and IEC Type 2 standards. It features fast/slow response time, A/C Weighting, Max Hold, and analog AC/DC output for connection to an analyzer or recorder. Comes complete with microphone wind screen, 9-Volt battery, and carrying case.
Features:
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Provides 1.5dB accuracy
-
Meets ANSI and IEC 651 Type 2 standards
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Two measuring ranges: 35 to 90dB (Low) and 75 to 130dB (High)
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Max Hold with reset button
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Built-in calibration check (94dB)
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Analog AC/DC outputs for connection to an analyzer or recorder
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Tripod mount ideal for field use
For complete specs please download the product datasheet (not available for some accessories)
Specifications:
Display |
3-1/2 digit (2000 count) LCD |
Display update rate |
0.5 seconds |
Microphone |
0.5” Electret condensor |
Measurement Bandwidth |
31.5Hz to 8KHz |
Dynamic range |
55dB |
Measurement Range |
35 to 130dB (Low: 35 to 100; High: 65 to 130dB) |
Frequency weighting |
‘A’ and ‘C’ (selectable) |
Applicable standards |
IEC-651 & ANSI S1.4 Type 2 |
Accuracy / Resolution |
± 1.5dB / 0.1dB |
Maximum Hold decay time |
<1dB / 3min |
Response time |
Fast: 125 milliseconds / Slow: 1 second |
Built-in calibration check
|
1KHz internal sine wave @ 94dB
signal is electrical and is injected after the microphone
|
AC Analog output |
0.65VAC rms (full scale); 600Ω output impedance |
DC Analog output |
10mVDC / dB; 100Ω output impedance (approx). |
Power |
9V Battery |
Battery life |
50 hours (typical); Low battery indicator alerts user |
Dimensions |
240 x 68 x 25mm (9.45 x 2.68 x 1”) |
weight |
210g (6.75oz) |
Accessories:
• Complete with hard vinyl case and 9V battery.
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