1Getting Started
28 U3402A User’s and Service Guide
Testing Continuity
The continuity test measures the resistance of a tested circuit with 2- wire
method at approximately 0.5 mA and determines whether the circuit is intact.
The beeper emits a continuous beep tone when the input resistance value is
less than the approximate 10 W.
Measurement are displayed as shown below:
• Measurement method: 0.83 mA ± 0.2% constant current source, open circuit voltage
limited to < 5 V
• Continuity threshold: 10 W fixed
• Input protection: 500 V RMS on all ranges
1 Press to toggle to the continuity measurement function.
2 Connect the red and black test leads to the input terminal as shown in
Figure 1- 19.
3 Probe the test points and read the display.
Reading rate Measurement display
Slow 120.000 W range
Medium 400.00 W range
Fast 400.0 W range
Disconnect circuit power and discharge all high-voltage capacitors before testing the
circuit continuity to avoid damaging the multimeter or the device under test.
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