4 Recorder
4.1 Functional Description
MPI-540 meter can be used as a 3-phase recorder of power supply parameters. It allows measure-
ment and recording of parameters of 50/60 Hz power networks such as voltage, current, power, har-
monics values, etc. To switch to the meter to power supply quality analyzer mode, select Recorder
on the main screen.
In this mode it is possible to view the current network parameters (i.a. waveforms, component vec-
tors, tabular data), recording of average parameter values according to the user settings and analysis
of the recorded data (time diagrams, harmonics, etc.).
The analyzer module uses the following input sockets of the meter:
three sockets of current clamps I1, I2, I3,
three voltage banana sockets L1, L2, L3 in the multifunctional socket, to which individual
voltage phases are connected (max. 550 V relative to earth),
separate banana socket marked N.
Fig. 4.1 Measuring inputs
Four sockets for current clamps allow the user to connect several types of clamps to measure cur-
rents. The following clamps may be connected to them:
flexible clamps F-1A, F-2A, F-3A of nominal range of 3000 A AC (different only in terms of
the coil perimeter ),
CT clamps: C-4A (range 1000 A AC), C-5A (range 1000 A AC/DC), C-6A (range 10 A AC)
and C-7A (range 100 A AC).
The measuring range may be changed by using additional transducers – for example, using a trans-
ducer of 10 000 A / 5 A with C-6A clamps the user may measure currents up to 10 000 A.
The recorded data is stored on a removable microSD memory card. The meter also has an internal
memory, which is used for storing i.a. configuration files. A detailed description of memory manage-
ment is contained in section 4.5.3.
Configuration of the recorder consists in that the user only sets the basic parameters: type of network,
type of clamps, frequency, averaging period. All data that the meter is able to measure is always rec-
orded. All parameters of the power supply network measured by the meter in the recorder mode are
listed below:
effective voltage,
DC components of voltages,
effective currents,
DC components of currents (only using C-5A clamps),
mains frequency within the range of 40..70 Hz,
harmonics of voltages and currents (up to 40th),
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