30 U1253B User’s and Service Guide
2 Making Measurements
Measuring Voltage
The U1253B true RMS OLED multimeter returns an accurate
RMS reading not only for sine waves, but also other AC signals
such as square, triangle, and staircase waves.
For AC with DC offset, use AC+DC measurement by selecting
or with the rotary switch.
Measuring AC voltage
1 Set the rotary switch to , , or .
2 Press if necessary to ensure is shown on the
display.
3 Connect the red and black test leads to input terminals
V.mV (red) and COM (black) respectively (refer to Figure 2- 1
on page 31).
4 Probe the test points and read the display.
5 Press to display dual measurements. See “Selecting
display with the Dual button” on page 19 for a list of
dual measurements available. Press and hold for
more than 1 second to exit dual display mode.
Ensure that terminal connections are correct for that particular
measurement before making any measurement. To avoid damaging the
device, do not exceed the rated input limit.
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