Extech Instruments 420 Spécifications télécharger pdf (Page 92)

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Figure 12: Freezing the Readings

TAKING A RELATIVE MEASUREMENT

The meter can display a reading ‘relative’ to a user-selectable reference value. Refer

to the following discussion on how to make a relative measurement.

First program a reference value. To do so, take a measurement and when the

desired reading is displayed press the “||/ ” soft-key until the ‘ ’ symbol is displayed

at the top of the screen; this indicates that the unit is in the Relative mode. The

reference value is shown on the display screen just below the relative mode symbol.

Now all subsequent readings in the main display area will be displayed relative to the

reference value.

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Extech Instruments 420 Spécifications Page 92