Extech Instruments SL10 Manuale utente

User's Guide

Personal Sound Level Meter

Model SL10

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Introduction

Congratulations on your purchase of the Extech SL10 Personal Sound Level

Meter. The SL10 measures and displays sound pressure levels in dB from 40

to 130dB with ‘A’ weighting frequency response (dBA). The LCD is backlit for

viewing readings in dimly lit areas and includes a MAX-MIN feature. Careful

use of this meter will provide years of reliable service.

Safety

Read the following safety information carefully before attempting to

operate or service the meter. Use the meter only as specified in this

manual; otherwise, the protection provided by the meter may be impaired.

Environmental Conditions

Altitude up to 2000 meters

Relative Humidity: 90% max.

Operating Temperature: 32 to 104oF (0 to 40oC)

Maintenance and Cleaning

Repair or servicing not covered in this manual should only be performed by

qualified personnel.

Periodically wipe the case with a dry cloth. Do not use abrasives or

solvents.

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Meter Description

1. Microphone sensor

2. Microphone chassis

3. Removable windscreen

4. Power switch

5. MAX-MIN button

6. LCD Backlight sensor

7. LCD Display

Battery compartment and tripod mount

located on rear of instrument

Measurement Considerations

1. Wind blowing across the microphone increases the noise measurement. Use the supplied

windscreen to cover the microphone when applicable.

2. Calibrate the instrument before each use if possible. Especially if the meter has not been used

for a long period of time.

3. Do not store or operate the instrument in areas of high temperature or humidity.

4. Keep meter and microphone dry.

5. Avoid severe vibration.

6. Remove the battery when the meter is to be stored for long periods of time.

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Operation

1. Power the meter by pressing the power button. The meter will begin displaying sound level

readings. If the LCD does not switch on, check the 9V battery located in the rear battery

compartment.

2. Hold the meter facing the microphone toward the source of the sound to be measured. For tripod

use, the meter includes a tripod mount on the rear side of its housing.

3. View the measurement on the meter’s LCD. An indication of OVER means that the measurement

exceeds 130dB.

4. The meter automatically switches off after 15 minutes of inactivity to conserve battery energy.

Press the power button to switch the instrument on again.

‘A’ Frequency Weighting

With ‘A’ weighting, the frequency response of the meter is similar to the response of the human ear.

‘A’ weighting is commonly used for environmental or hearing conservation programs such as OSHA

regulatory testing and noise ordinance law enforcement.

Fast Response Time

The meter has a fast response time of 125 milliseconds (ms) in order to capture noise peaks and

noises that occur very quickly.

Over Range Alarm (OVER)

If the measurement exceeds 130 dB, the display indicates OVER. To avoid damage to the meter,

do not continue to use the meter in an environment where the sound measured exceeds 130dB.

MAX-MIN HOLD

In this mode, the meter only updates the LCD reading when a higher reading (MAX mode) or lower

reading (MIN mode) is detected. Select MAX HOLD by momentarily pressing the MAX-MIN button.

The meter displays the MAX icon when in the MAX HOLD mode. Press the MAX-MIN button again

to enter the MIN mode (the MIN icon will display). Press and hold the MAX-MIN button to exit this

mode (the MAX-MIN indicators will switch off).

Backlit LCD Display

The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. The backlight

automatically switches on and off based on ambient light conditions. The backlight sensor located

just above the LCD display and just below the power button senses ambient light conditions.

Battery Replacement

When the low battery icon BAT appears on the LCD replace the 9V battery as soon as possible.

The battery compartment cover is located on the rear of the meter. Slide the battery compartment

cover off, change the battery, and replace the compartment cover.

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Specifications

Display 4-digit (4000 count) backlit LCD

Display update rate 0.5 seconds

Microphone 0.5” Electret condenser

Measurement

Bandwidth

31.5Hz to 8KHz

Measurement Range 40 to 130dB

Frequency weighting ‘A’ (dBA)

Accuracy / Resolution ± 3.5dB (under 94dB reference conditions) /

0.1dB

Response time 125 milliseconds

Power 9V Battery

Battery life 50 hours (typical); low battery indicator alerts

user

Automatic power off After approx. 15 minutes of inactivity

Operating

temperature

32 to 104oF (0 to 40oC)

Operating humidity 10 to 90% RH

Storage temperature 14 to 140oF (-10 to 60oC)

Storage humidity 10 to 75% RH

Dimensions/weight 8.3 x 2.2 x 1.3” (210 x 55 x 32mm) / 4.8oz

(135g)

Approvals CE

Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

ISO‐9001Certified

www.extech.com

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