Extech Instruments HD600 Guia do Utilizador descarregar pdf (Página 7)

HD600–en-GB_V1.4 04/15

ANALOG OUTPUTS

The meter is equipped with an analog output feature. The analog output jack is

located on the meter’s side panel and requires a 3.5mm stereo phono plug. (1-

AC Output, 2-DC Output, 3- Ground)

AC analog output

The AC output is a retransmitted representation of the meter’s measurement (note that the output

factors in the meter’s frequency weighting selection ‘A’ or ‘C’).

 Output voltage: 1Vrms at full scale of the selected range.

 Output impedance: 100Ω approx.

DC analog output

The DC output signal reflects the frequency weighting selected (‘A’ or ‘C’).

 Output voltage: 10mV (±1mV) per displayed dB.

 Output impedance: 1KΩ approx.

Calibration

Frequent calibration is recommended and is often required by noise standards and

directives.

1. Turn the meter ON

2. Put the meter in the ‘A’ weighting mode

3. Put the meter in the ‘SLOW’ response mode

4. Place the calibrator onto the microphone.

5. Turn the calibrator ON.

6. Adjust the meter’s CAL potentiometer located on the side panel so that the

meter’s display matches the output of the calibrator (typically 94dB or 114dB).

Battery Replacement

1. The battery icon will appear on the display when the battery needs replacing.

2. Turn the meter OFF and slide the rear battery cover off.

3. Install the 9V battery and replace the cover.

Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the

end of its lifecycle

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Extech Instruments HD600 Guia do Utilizador Página 7