MD9272 Leakage Clamp TRMS Meter with Power Function
Description of Functions
12
Intelligent loss analysis (mA measurement only)
The clamp A-meter includes an algorithm that determines the cause of the current loss.
This mode is enabled only when current is measured in the mA range and TRMS
measurement is selected. In the TRMS measurement function, one or two icons will be
shown on the screen informing of the possible reasons for the loss.
This icon indicates that the loss is possibly due to a defect in
the equipment insulation.
These two icons indicate that the loss may be partially due to
defects in the insulation and partially to the accumulation of
non-linear loads.
This icon indicates that a loss is possibly due to a high
accumulation of non-linear loads.
Harmonic analysis
The clamp-meter measures harmonic content of the signal up to 19
th
component,
displaying the effective value and the harmonic number. A harmonic is a multiple of the
network base frequency. If, for example, the 3
rd
harmonic is measured on a 50 Hz
network frequency, this means measuring the magnitude (current or voltage) of the 150
Hz component.
In this function, the measurement of the effective value of any harmonic in the range of
1 to 19 range is executed. Initially displayed is the harmonic 1, but this can be modified
using the
+
and
-
keys. The display shows the effective value together with the
harmonic number (to the bottom of the screen).
In this mode, data hold and registering of maximum and minimum values is possible by
using the
H
key.
Harmonic analysis (percentage values)
Harmonics can be measured (1 through to 19) as a percentage of the fundamental (the
1st) harmonic, also called the fundamental frequency. Initially the harmonic 1 is
displayed but this can be changed using the
+
and
-
keys. The display shows the
