Technical data

46 U1401A User’s and Service Guide
3 Making Measurements
Measuring Voltage
The U1401A performs true- rms AC measurements that are
accurate for square waves without any DC offset.
Measuring DC voltage
1 Turn the rotary switch to .
2 Press to select DC voltage measurement.
3 Connect the red and black test leads to the positive and
negative input terminals respectively (Figure 3- 1 on
page 47).
4 Probe the test points and read the display.
WARNING
Make sure that the terminal connections are correct for a particular
measurement before making the measurement. To avoid damaging the
U1401A, do not exceed the rated input limit.