Sper-scientific 840018 Sound Level Meter Pen Instrukcja Użytkownika Pobierz pdf (Strona 5)

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electrical calibration of the unit.

• The LCD displays "CAL" for about 1

second. As needed, use the calibration

tool to adjust the Calibration (CAL) VR

until "94.0dB" is displayed.

• This ends the calibration. Make sure

that the Measurement Slide Switch is

returned to the "MEAS" (up) position

and the Battery Cover is reattached.

2. Acoustic calibration using a standard

sound calibrator such as Sper Scien-

tific's 840031.

• With the Measurement Slide Switch in

the "MEAS" (up) position, place the mi-

crophone in the calibrator.

• As needed, use the calibration tool to

adjust the Calibration (CAL) VR until

"94.0dB" is displayed.

Measurement

1. Press the Power / Max Hold button to

turn the meter on.

2. Point the Microphone at the noise

source.

3. The LCD displays the measured sound

level. Readings are updated twice

every second.

• "OVER" is displayed when the sound

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Sper-scientific 840018 Sound Level Meter Pen Instrukcja Użytkownika Strona 5