Extech Instruments 420 Especificaciones descargar pdf (Pagina 91)

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91

V5.1‐March2010

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To measure AC current larger than 400 mA, perform the following:

5. Press the A key and use the SET key to select the ACA mode (ACA symbol will

appear at the top of the screen when selected)

6. Press the F5 soft-key to select the 10A measurement mode, the unit of measure

on the main reading screen should be A

7. Connect the red and black test leads to the measured points on the circuit under

test; The AC current value will be displayed on the screen.

8. Press the F4 soft-key to return to the mA measurement mode

Refer to the example in Figure 11.

Figure 11: AC Current Measurement for 10A

FREEZING THE READINGS (DATA HOLD)

You can hold the displayed readings at any time.

1. Press the RUN /STOP key to freeze the screen. STOP will be displayed at the

top right of the screen

2. Press the RUN /STOP key again to resume normal measurement operation

Refer to the example in Figure 12.

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Extech Instruments 420 Especificaciones Pagina 91