SOUND LEVEL METER Users Manual
■. Introduction Please read the following information carefully before using the meter. The Sound Level Meter has been designed to measure sound level for various environments. It is used to detect noise, music level or sound engineering... 1.1 Precautions safety measures Please use it according to the following usage. Environment conditions: ● Altitude: less than 2000 meters. ● Relatively humidity 80% max ● Operation temperature 0~40℃ Maintenance & save: Do not clear the meter using alcohol and impregnant.
Comply with European Union’s 93/68/EEC 1.1.1 During use 1. Do not use the meter in a high temperature or wet place. 2. When you do not use for a long time, please take out batteries to avoid damaging the meter by electrolyte. 3. Auto-range measuring (30-120dB) is unfit for measuring instantaneous and impactive noise. 4. To measure sound level in a windy environment, please put windscreen on the microphone to avoid noise from wind. 5.
1.2 Functions & Features ● automatic ranging / manual ranging selection. ● Analog bar indicator. ● Frequency weighting A Type. ● Range display. ● Automatic shutdown / continuous working mode selection. ● Low battery voltage indication. ● Sound OVER or UNDER display. ● Software calibrating to insure high reliability. ● Good circuit designed to save power. ■. Features ● The meter has been designed according to the IEC651 Type 2, ANSI S1.4 Type 2. ● Response frequency: 31.5Hz—8kHz.
● Digital display：4 digitals. ● Frequency weighting： A Type. ● Response time：Analog bar 125ms Digital 750ms. ● Microphone： Electret Condenser microphone. ● Power supply: DC1.5V(AAA)*3 . ● Operating temperature ：0 ~ +40℃. ● Operating humidity： 10 ~ 80%RH. ● Storage temperature： -10 ~ +60℃. ● Storage humidity ： 10 to 70%RH. ● Dimensions： 156(L)×60(W)×32(H) mm. ● Weight ： Approx 150 g (including battery). ● Accessories： x 3pcs DC1.
■. Names of parts Instrument Familiarization 1. Windscreen 2. Sound level sensor 3. LCD display 4.
The meaning of the symbols represented by the following： 1. Analog bar 2. UNDER 3. OVER indication to high range indication to low range 4. Display zone 5. Auto mode 6. Manual mode 7. Sound unit: dB 8. Indication to low voltage of the batteries ■. Operation instruction 1. Press button On/Off , the meter starts auto-range measuring after the screen displays all the LCD segments. symbol AUTO displays and the microcontroller selects a proper range to measure sound automatically.
is less than 30 dB or is higher than 120 dB. 2. To set range manually If it is necessary to set range manually, press button Auto/Manu, symbol MANUAL displays. You can press button Up or Down to choose the proper range. The range is displayed on top of the screen. When LCD appears UNDER symbol, it indicates that the range is high, you need to press button Down to set lower range until no UNDER symbol.
5. Continuous working mode When you need to measure sound continuously, should cancel automatic shutdown function. To get that, before meter starts working, press button Down and button ON/OFF at the same time, automatic shutdown will not occur. 6. Low voltage indication When battery voltage is too low to work, a battery symbol appears on screen. It reminds you to change battery. ■. Keys instruction 1. ON/OFF key Press the key to turn the power ON.
Under the state of auto-range measuring, symbol AUTO displays and the micro- controller selects a proper range to measure sound automatically. The range is displayed on top of the screen. Under the state of manual-range measuring, symbol MANUAL displays. You can press button Up or Down to choose the proper range. The range is displayed on top of the screen. 3. UP key Under the state of manual-range measuring, You can press button Up or Down to choose the proper range.
can press button Up or Down to choose the proper range. When LCD appears UNDER symbol, it indicates that the range is high, you need to press button Down to set lower range until no UNDER symbol. Press button Down and button ON/OFF at the same time, automatic shutdown will not occur. ■. Calibrating Sound level Meter When Sound Level Meter is used for a long time, the accuracy may reduce, you need to check and calibrate it, normally a time for each year.
of cold water. NOTE: This unit is not designed for complete submersion or washing in water. 2. BATTERY REPLACEMENT Use the following procedure: When the battery voltage drop below proper operation range the symbol will appear on the LCD display and the battery need to be replaced. * Press the battery cover and towards arrowhead direction to open the battery cover. * Replace the battery with three new 1.5V batteries (AAA). WLS2114 * Replace the battery cover.
