Extech Instruments 420 Especificaciones descargar pdf (Pagina 85)

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85

V5.1‐March2010

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MEASURING CAPACITANCE

To measure Capacitance, refer to the following:

1. Insert the black lead into the COM jack, and the red lead into the V/Ω/C jack

2. Press the R key. An ‘R’ appears at the top of the screen

3. Press the SET key until the C appears at the top of the screen

4. Connect the black and red leads to the capacitor or circuit under test; the

meter will display the reading (Unit of measure: Farad)

Notes: To improve accuracy when the measured value is lower than 5 nF, select the

lowest capacitance range and use the Relative mode.

Please allow approx. 30 seconds for capacitance measurements larger than 40uF.

Refer to the example diagram in Figure 5.

Figure 5: Capacitance Measurement

MEASURING DC VOLTAGE

To measure DC voltage, refer to the following:

1. Insert the black lead into the COM banana jack input and the red lead into

the V/Ω/C banana jack input

2. Press the V key and the DCV symbol will appear at the top of the screen

3. Connect the red and black test leads to the measurement points on the

circuit under test; the voltage value will be displayed on the screen

Refer to the example diagram, Figure 6.

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Extech Instruments 420 Especificaciones Pagina 85