CUSTOM Digital Sound Level Meter SL-1340U

It supports both a "digital display" that allows you to instantly check the measurement value, and an "analog display" that allows you to instantly recognize the change in the measurement value on a graph.

• Compliant with international standard IEC 61672-1.
• The maximum or minimum measurement value can be displayed.
• Equipped with an alert function that displays "OVER" when the measurement value exceeds the set analog range, and "UNDER" when it falls below.
• The time constant can be switched (FAST/SLOW) depending on the measurement target.
• Calibration function included (A-weighted only. Calibrator sold separately.)
• Comes with AC/DC output terminal.

Supports A/C characteristics and FAST/SLOW switching.

It supports both "A-weighting," which is close to human hearing and is used for general noise measurement, and "C-weighting," which is suitable for measuring sound pressure levels with a high level of low frequency components such as impact sounds. It is also possible to switch between "FAST" weighting (time constant: 125 ms), which provides measurements close to the response time of the human ear, and "SLOW" weighting (time constant: 1 s), which provides measurements of the average level of fluctuating noise.

Supports two types of display: "analog display" and "digital display."

It supports two types of display: an "analog display" that allows you to instantly recognize the amount of change, and a "digital display" that allows you to instantly check the measurement value.

Part names

Main unit

• ① Windshield sponge
• ② Display section
• ③ Power button
• ④ Level range control button
• ⑤ Frequency weighting selection button
• ⑥ Maximum/minimum value hold button
• ⑦ Time weighting characteristic selection button
• ⑧ Microphone
• ⑨ AC/DC output terminal
• ⑩ Tripod mounting part
• $j Battery cover

Screen display section

• ① Auto power off enabled indicator
• ② Measured value is below the lower limit of the analog range
• ③ Analog range display
• ④ Measurement value display (digital)
• ⑤ Battery level display
• ⑥ Time weighting characteristics (fast response)
• ⑦ Time weighting characteristics (slow response)
• 8) Measurement value is displayed as being above the upper limit of the analog range
• ⑨ Maximum/minimum value hold status display
• ⑩ Calibration mode display
• $j Frequency weighting (A-weighting) display
• $k Frequency weighting (C characteristic) display

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specification

Electrical Performance

Frequency response	A characteristic/C characteristic
Frequency Range	20 Hz to 8 kHz
Measurement range	32.0 to 130.0 dB
display	Digital (4 digits)	Analog (bar graph)
Analog Range	-	Lo: 30 to 90 dB Med: 50 to 110 dB Hi: 70 to 130 dB
resolution	0.1 dB	2 dB
sampling	Approximately 2 times/second	5 times/second
Measurement accuracy	±1.4 dB (94 dB, at 1 kHz)
Dynamic characteristics	FAST (time constant 125ms) SLOW (time constant 1s)

General specifications

Auto Power Off	Approximately 30 minutes (can be canceled)
Operating temperature and humidity	0 to +40°C, 10 to 90% RH (no condensation)
Storage temperature and humidity	-10 to +60°C, 10 to 75% RH (no condensation, excluding batteries)
size	Approx. W 55 × H 258 × D 25 mm (excluding windshield sponge)
weight	Approximately 200 g (including batteries)
power supply	9V battery x 1
battery life	Approximately 40 hours (when using alkaline batteries)
accessories	Instruction manual, windshield sponge, storage case
Compliance standards	IEC61672-1 Class 2
proofreading	Possible
JAN	4983621181340