MS400 datasheet(29/51 Pages) EXTECH

29 / 51 page

MS400 Version 2.0 – December 2007

To measure AC current larger than 400mA:

1. Press the AUTO SET key once and ACA

will be visible at the top of the screen.

2. Press F5 to select 20A, the units for the

main reading window will be A.

3. Press the AUTO SET key once and ACA

will be visible at the top of the screen.

4. Plug the current extended module into the

current measurement jack, and plug the test

leads into the shunt.

5. Connect the red and black test leads in

series to the measurement points and the

AC current value will be displayed on the

screen.

6. Press F4 to return to the 400mA

measurement mode.

Figure 30: AC Current Measurement for 20A

Freezing a Displayed Reading

Freeze 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

measurements.

Figure 31: Freezing the Readings

Taking a Relative Measurement

A reading, relative to a reference value, is displayed in the relative measurement mode. The

following example shows how to take a relative measurement. First, the user must define a

reference value:

1. Press the R key and R will be displayed on the

top of the screen.

2. Press the AUTO SET key untill C appears at

the top of the screen.

3. Plug the capacitance extended module into the

capacitance measurement jack.

4. When the reading stabilizes, press F2 and the

triangle icon will be displayed on the top of the

screen.

The

saved

reference

value

displayed below the triangle

5. All subsequent readings will be displayed

relative to the stored reference reading.

Figure 32: Relative Measurement.

MS400 Datasheet(PDF) 29 Page - Extech Instruments Corporation.

MS400 Datasheet(HTML) 29 Page - Extech Instruments Corporation.

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