MEWOI MEWOI1500D, Manual

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continually, press the POWER key to make HV detector in
continuous running, and then press the POWER key again to
power off.
2. Power-on/off of principal machine
Press the POWER key to power on, then LCD begins to display,
the principal machine enters the test and receiving mode after a
normal booting (see below), 1st means the measured data of the
primary circuit on HV terminal, 2nd means the measured data of
the secondary circuit on LV terminal, F. Er means the error
between the measured CT ratio and preset CT ratio, R, S, and T
means the three phases respectively, and the data measured by
LV current clamps of CT1, CT2, and CT3 can be displayed on the
position of R, S, and T on screen respectively. the LCD can display
the
symbol “- - -” if the principal machine doesn’t receive the signal
from primary circuit; the principal machine can detect the phase
and polarity firstly, if receives the data of the primary and the
secondary circuit normally, the primary circuit currents are
correspondingly visible on the phases of R, S, and T, both the error
and polarity can be displayed on the upper left corner of LCD. If the
symbol “Err” displays on the upper left corner of LCD display, it is
not available to detect the polarity properly, and the measured
currents of the primary circuit remain being displayed on the
R-phase.