Aktakom ??M-1130, User Manual

Page: 13 / 44

АМM-1130
13
Function Descriptions
Along with the conventional measurement functions this meter also possesses some special functions which being described as
follows:
●
True effective value (TRUE RMS) measurement: all the measurement values of this meter on the AC voltage and AC
current are true effective values, which distinguishing this meter from the low-grade meters which only can measure the AC
average value.
●
Automatic and manual ranges: When turning on the meter’s power switch the meter defaults the automatic range
state(AUTO displaying), and simultaneously it will automatically select the proper range according to the measured electric
parameters. If OL being displayed under automatic range, it indicates the measured value exceeding the meter’s maximum
range. Pressing the RANGE key under the automatic range the meter will enter the manual range (MANUAL displaying),
then pressing the RANGE key again it will be possible to select the required range. The indicator for range will display the
maximum value of this range. If OL displaying under the manual range, it indicates the measured value exceeding the
selected range. Press the RANGE key under the manual range for two seconds and then release it, the meter will go back to
the automatic range state.
●
Linear frequency measurement: Pressing the HZ/DUTY key when the meter performing measurements on AC voltage or
current.
●
Logic impulse duty ratio measurement: logic impulse duty ratio refers to
：
(high level width/impulse cycle)×100%.
●
Diode measurement: during diode measurement the meter is indicating to the forward voltage drop of the diode
●
Relative measurement: during relative measurement the meter remembers internally the instantaneously measured
value(called initial value)when pressing the REL key, and the later displaying value being: