Specifications

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