Chapter II
24 Portable digital multimeters
4. FUNCTIONAL DESCRIPTION
4.1. RANGE / AC+DC key
The RANGE key is operative in following positions of the selector switch :
VLOW Z, V
AC+DC
, V
DC
, Ω, .
This key makes it possible :
• In AUTO (Autoraging) mode to switch to MANUAL mode (short press).
• In MANUAL mode, to select the next range (short press) or return to AUTO mode
(long press), the AUTO sign appears on the display.
This can be used to switch on the multimeter again after an automatic shutdown. It can
also be used to access secondary functions associated with the selector switch positions:
mode AC+DC.
The flowcharts below define these various functions.
4.1.1. ADP
DC
/ ADP
AC+DC
Position
This function is adapted for accessories with mV output.
4.1.2. 500 mA
DC
/ mA
AC+DC
Position (except MX 23) (MX 24 : 50 mA / mA
AC+DC
)
ADP
AC+DC
AC+DC voltage measurement (TRMS)
(Range 500 mV
AC+DC
)
500 mA
AC+DC
AC+DC current measurement (TRMS)
(Range 500 mA
AC+DC
)
ADP
DC
DC voltage measurement
(Range 500 mV
DC
)
500 mA
DC
DC current measurement
(Range 500 mA
DC
)
AC+DC key
AC+DC key
AC+DC key
AC+DC key
The AC+DC sign
appears on the display.
The AC+DC sign
appears on the display.
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