Sper-scientific 840018 Sound Level Meter Pen Manual do Utilizador descarregar pdf (Página 4)

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III. Operating Instructions

Precautions and Maintenance

• Do not store or operate the instrument at

high temperatures or humidity.

• Keep the microphone dry and avoid se-

vere shock or vibration.

• Wind blowing across the microphone can

cause measurement errors, these effects

are reduced by using the windscreen.

• Remove the batteries if the unit is not in

use for a long period of time.

• Wipe the case with a dry cloth, do not

use abrasives or solvents.

Calibration

Calibrate the meter before first use or

when the reading appears inaccurate.

If you require a certificate of calibration

traceable to NIST, the unit may be sent to

Sper Scientific for servicing (fee applies).

There are two methods of calibration:

1. Internal Electrical Calibration

• With the unit on, lightly press the

Battery Cover to slide it down and off.

• Move the Measurement Slide Switch

down. This activates the built-in

oscillator (94dB 1 kHz, sine wave) for

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Sper-scientific 840018 Sound Level Meter Pen Manual do Utilizador Página 4