19

20

(As shown in Figure 6), connect one of V1, V2 & V3 ends which correspond to 3 phase locations 
and 2 testing pens of COM end to firing line and zero line of measured wires during 
measurement of 2 single-phase wires.

Figure 6 Power measurement of single-phase two-wire system

4

 As shown in Figure 7-1, please select 

SELECT

 key to 

    select the 1st phase location when adopting three-phase 
    four-wire system for load so as to display active power, 
    voltage and current of phase location 

1.

Figure 

  As shown in Figure 7-2, please press 

 key to 

     measure total three-phase power. Current measured power 
     of the 1st phase location also shall be calculated and 
     saved.

Figure 

 As shown in Figure 7-3, please press SELECT key to 

    select the 2nd phase location of 

2. It also can display 

    active power, voltage and current of phase location of 

2.

Figure 

 As shown in Figure 7-4, please press 

 key to 

    measure total three-phase power. Current measured 
    power of the 2nd phase location also shall be calculated 
    and saved.

Figure 

 As shown in Figure 7-5, please press SELECT key to 

    select the 3rd phase location. It also can display active 
    power, voltage and current of phase location of 

3.

Figure 

UT241/242/243 OPERATING MANUAL 

UT241/242/243 OPERATING MANUAL