Mega MEg 30, Руководство пользователя

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According to the place of measurement, either safety alligator clips or grips with
an integrated fuse shall be inserted onto modular banana plugs of the measuring
conductors U1, U2, U3, U4, complying with the category of measurement IV. Grips
with an integrated fuse shall be used for measurements in unprotected circuits. Red
alligator clips shall be connected to measuring conductors U1, U2 and U3,a blue alli-
gator clip to conductor N and a black one to conductor N. The measuring conductor
N shall be first connected to the neutral conductor of the measuring point and only
then measuring conductors U1, U2, U3 and/or U4 shall be connected. In case of a
single-phase or a two-phase measurement the conductors which are not being used
shall be connected to conductor N. The supply for MEg30 shall be switched-on by
connecting the first one of the measuring conductors U1, U2 or U3 to the phase volt-
age higher than 100 V
ef
.
After the supply has been connected, the LED diode OPERATION (PROVOZ)
will be lighting permanently and, at a possible disconnection of the external supply
during the following 1 minute interval, the PQ monitor continues to measure while
being supplied with energy from the built-in battery. The LED diode OPERATION
(PROVOZ) is lighting intermittently with frequency 5 Hz during this period. After 1
minute the PQ monitor stops the measurement and the LED diode OPERATION
(PROVOZ) will not be lighting any more.
A switched-on notebook with the started program PQ-monitor shall be con-
nected – at the place of measurement – to the monitor being supplied, using the ca-
ble of a series communication interface USBII. The item Setting of measurement
shall be chosen and a correct choice of the nominal value of the current on the cur-
rent sensors, a correct order of connected voltages and a correct orientation of the
current sensors shall be checked. By using the procedure described in the user guide
for the program PQ-monitor, the measuring protocol shall then be specified accord-
ing to which the PQ monitor in version MEg30 will measure.
The portable version MEg30 of the PQ monitor can also be programmed in ad-
vance in the laboratory and at the place of measurement the monitor shall only be
connected into measuring and supply circuits. However, a correct connection and a
suitable choice of the range of currents being measured is not possible here.
The portable version MEg30 of the PQ monitor can be connected to telecommu-
nication devices via a series interface USBII in a standard way.
In order to save the energy of the internal battery, it is recommended to suppress
the unnecessary (in this case) one-minute back-up supply of the monitor when dis-
connecting it from the supply. This shall be done by using the notebook with the
started program of the PQ monitor where the item Uspat shall be updated in menu
Measuring instrument.
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MEgA Měřicí Energetické Aparáty