background image

Operation

5

5.4

Fast/Slow Response

Short press the

Fast/Slow

button to toggle the meter’s response time. Use the

Fast response mode (125 ms) to capture sounds that peak very quickly such
as fireworks. Use the Slow response mode (1 second) to monitor consistent
sounds such as the hum, or drone, of machinery.

5.5

Data Hold Function

Short press the Data Hold (

H

) button to freeze/unfreeze the displayed read-

ings. While Data Hold is active,

HOLD

will appear on the LCD.

5.6

LCD Backlight

Long press the backlight button

to switch the display backlight on or off.

Excessive use of the backlight will shorten battery life.

5.7

MAX/MIN Readings

When the device is switched on, it begins tracking the highest (MAX) and low-
est (MIN) readings.

Short press the

MAX/MIN

button to step through the MAX/MIN memories.

The memories are cleared each time the meter power is cycled.

Press the

MAX/MIN

button again to exit this mode (

MAX

and

MIN

symbols

switch off when you exit).

5.8

Bluetooth Operation

Long press the Bluetooth button

with the meter on, to switch Bluetooth on

or off. This communication symbol

is shown when Bluetooth is on.

The Bluetooth utility allows you to remotely monitor readings on an iOS or An-
droid smart device using the Extech ExView mobile app designed for use with
this meter.

Download the ExView mobile app from the App Store for iOS devices or from
Google Play for Android devices. Instructions for mobile app use are available
from the ExView product page on the Extech website (link below).

http://www.extech.com

Switch APO off when using Bluetooth by pressing and holding the power

and

H

buttons for 2 seconds (the APO symbol

will switch off). This will pre-

vent the meter from automatically switching off while you are logging data or
monitoring readings in real time on your smart device.

#NAS100077; r. AA/78958/78963; en-US

7

Summary of Contents for SL250W

Page 1: ...User Manual SL250W Sound Meter Bluetooth Connectivity with the ExView Mobile App ...

Page 2: ...t Slow Response 7 5 5 Data Hold Function 7 5 6 LCD Backlight 7 5 7 MAX MIN Readings 7 5 8 Bluetooth Operation 7 6 Maintenance 8 6 1 General Cleaning 8 6 2 Battery Replacement 8 7 Specifications 9 7 1 General Specifications 9 7 2 Measurement Specifications 9 7 3 Environmental Specifications 9 7 4 Connectivity Specifications 10 8 Two year Warranty 11 8 1 Calibration and Repair Services 11 8 2 Contac...

Page 3: ...to power off data hold backlit LCD and tripod mount Using the Extech ExView mobile app you can pair your smart devices with the meter using Bluetooth The app and the W Series meters were developed together for seamless integration Download the free app from the App Store iOS or from Google Play Android This quality instrument is designed to provide years of reliable service high accuracy and simpl...

Page 4: ...r serviceable components in this device Replace the batteries immediately after the low battery symbol appears If the device is to be stored for a period of months please remove the batteries and store separately Do not store the device in high temperature or humidity environments in flammable or combustible areas or where a strong electromagnetic field is present This device is designed and produ...

Page 5: ...ticular installation If this equipment does cause harmful interference to radio or television recep tion which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures 1 Reorient or relocate the receiving antenna 2 Increase the separation between the equipment and receiver 3 Connect the equipment into a...

Page 6: ...ress to switch off With the meter powered long press to switch Bluetooth on off Short press to switch the meter off directly from the Bluetooth mode MAX MIN button Short press to cycle through MAX MIN readings The memories are cleared each time meter power is cycled Data Hold Backlight button Short press to freeze unfreeze the displayed reading HOLD will display when data hold is active Long press...

Page 7: ...ch as the drone of machinery APO ON OFF With the meter on long press the power and H buttons to switch APO on off The APO symbol is displayed when APO is enabled APO is reset each time the meter power is cycled 4 3 Display Symbols 1 Bluetooth active 2 A weighted dBa sound level reading 3 Maximum reading 4 Minimum reading 5 Data Hold mode 6 Battery status icon 7 Slow response mode 8 Fast response m...

Page 8: ...icating that the function is disabled APO is reset each time the meter s power is cycled Repeat this process to switch APO back on manually 5 3 Taking Measurements 1 Long press the power button to switch the meter on 2 Hold the meter in hand set it on a desk or table or mount it on a tripod in the area under test 3 Read the sound level measurement on the LCD Sound level measure ments are presented...

Page 9: ...eared each time the meter power is cycled Press the MAX MIN button again to exit this mode MAX and MIN symbols switch off when you exit 5 8 Bluetooth Operation Long press the Bluetooth button with the meter on to switch Bluetooth on or off This communication symbol is shown when Bluetooth is on The Bluetooth utility allows you to remotely monitor readings on an iOS or An droid smart device using t...

Page 10: ...isture to enter the mi crophone or the meter housing 6 2 Battery Replacement This device is powered by three 3 1 5 V AAA batteries When the low bat tery symbol appears replace the batteries immediately as explained below 1 Switch the meter off and remove the rear battery compartment cover 2 Replace the batteries observing correct polarity Always use batteries of the same type 3 Secure the battery ...

Page 11: ... Three 3 1 5 V AAA batteries Dimensions 6 1 x 2 2 x 1 1 in 154 x 55 x 28 mm Weight 4 1 oz 116 g 7 2 Measurement Specifications Accuracy specifications apply for the following conditions Temperature 73 4 9 23 5 Relative Humidity 90 Temperature coefficient 0 1 x accuracy Measurement range 30 to 130 dB A weighted Display resolution 0 1 dB Measurement accuracy 1 5 dB Frequency Response 31 5 Hz to 8 kH...

Page 12: ...vity Specifications Connectivity Bluetooth with ExView app ExView app compatibility iOS 13 0 and Android 9 0 or higher Transmission distance Up to 295 3 ft 90 m with no line of sight obstruction NAS100077 r AA 78958 78963 en US 10 ...

Page 13: ...we sell We offer NIST traceable calibration for most of our products Contact us for information on calibration and repair availability refer to the contact information below Annual calibrations should be performed to verify meter performance and accuracy Product specifications are subject to change without notice Please visit our website for the most up to date prod uct information www extech com ...

Page 14: ... NAS100077 r AA 78958 78963 en US 12 ...

Page 15: ......

Page 16: ...ort flir com Copyright 2021 FLIR Systems Inc All rights reserved worldwide Disclaimer Specifications subject to change without further notice Models and accessories subject to regional market considerations License procedures may apply Products described herein may be subject to US Export Regulations Please refer to exportquestions flir com with any questions User Manual ...

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