Making Measurements 2 
Using VZ
LOW
 for Voltage Measurements
U1231A/U1232A/U1233A User’s Guide 37
Figure 2-6 Measuring VZ
LOW
 voltage
4
1
3
Adjacent unused wiring
2
Energized wiring
• The multimeter will automatically identify the voltage measurement 
based on the following criteria:
• If AC V > 0.5 V or AC V ≥ the absolute of DC V, AC V will be selected.
• Otherwise, DC V will be selected.
• Press   once to lock the initial signal identification (AC V or DC V). 
Press   again to exchange the AC and DC voltage indication on the 
primary display. Pressing   for the third time will restart the auto 
identification of the signal. See Figure 2-7 to learn more.