34
Model UT233: OPERATING MANUAL
H. Phase Sequence
For Phase Sequence Judging, connect the Meter as
follows:
1. Press the
MENU
to select AC Voltage (main display)
+ AC Voltage (left secondary display) + AC Voltage
(right secondary display) range as figure 31.
Insert red test lead into
V1
input terminal.
Insert blue test lead into
V2
input terminal.
Insert yellow test lead into
V3
input terminal.
Insert black test lead into
COM
input terminal.
Connect these four test leads to the circuit under
test or the loading of three phases and grounding
terminal
For the loaded return circuit of 3 phases 4 wires, the
Meter shows the phase sequence result as figure
32, 33 and 34:
Figure 31
Figure 32
=phase missing
Figure 33
=negative phase
sequence
Figure 34
=positive phase
sequence
Black
Red
Blue
Yellow
