Amprobe AM-270 Specifications download pdf (Page 15)

The shortcut is to short the test leads in auto-ranging resistance mode until

the meter enters the lowest 50 range automatically, press the RANGE button

momentarily to get the “Shrt” prompt, then wait about 3 more seconds until

the display shows zero.

Note: The calibration stays until you change ranges, functions, or go back to

auto-ranging mode.

µA, mA, and A Current Functions

Default at DC. Press SELECT button momentarily to select AC.

*Note: When measuring a 3-phase system, special attention should

be taken to the phase-to-phase voltage which is signiﬁcantly higher

than the phase-to-earth voltage. To avoid exceeding the voltage

rating of the protection fuse(s) accidentally, always consider the

phase-to-phase voltage as the working voltage for the protection

fuse(s).

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Amprobe AM-270 Specifications Page 15