User Manual

10 GMC-I Messtechnik GmbH
4 Function and Range Selection
The function selector switch (6) is coupled with the Automatic
terminal Blocking System (ABS) which allows access only to
two correct sockets for each function. Prior to switching to the
„mA“ or „A“ functions or from the „mA“ or „A“ functions,
remove the test lead from the corresponding socket. When the
test leads are plugged in, the terminal blocking system pre-
vents accidental switching to non permissible functions.
4.1 Switching the Measuring Ranges
The 660 mVAC and 660 mVDC measuring ranges are not
automatically selected when the multimeter is switched ON.
The above ranges can only be selected manually with the
„AUTO/MAN“ key.
4.2 Auto / Manual Ranging
The multimeter features auto ranging for all measuring ranges
with the exception of the °C, °F, continuity, Diode, %, AAC,
ADC. Autoranging is automatically selected after switching the
multimeter ON. According to the measured quantity applied,
the multimeter automatically selects the measuring range
which gives the best resolution. You can switch OFF auto-
ranging and select the ranges manually according to the table
shown in this section. Manual mode is switched OFF when
pushbutton AUTO/MAN is pressed (4) for approximately 1 s, or
when the function selector switch (6) is operated, or when the
multimeter is turned OFF and ON again.