UT3550 Battery Tester Users Manual
14
Note:
In order to ensure the accuracy of the instrument, please use the attached test lead for testing.
Warning
：
It is pronhibited to connect the AC current and voltage source directly to the test
terminals
.
3.2
Measurement Method of DUT
After correctly connecting the test leads to the Sense and Source test terminals of the instrument,
please connect the test leads to the DUT as follows. Note that the red test pen should be connected to
the positive electrode of the battery, and the black test pen should be connected to the negative
electrode. As shown in Figure 3-2-a.
If the positive and negative poles of the terminal of the DUT are connected reversely, and the test
voltage value is negative, please exchange positions of the red and black test pen.
Figure 3-2-a Connect the Test Lead to the DUT
When testing with an alligator clip, user can use the test lead to directly champ the terminal of the
DUT for four-terminal testing.
If testing with a crown probe test pen, user can put the red and black test lead probes against the
corresponding positive and negative terminals of the DUT for four-terminal testing, as shown in
Figure 3-2-b.
Figure 3-2-b Schematic Diagram of Crown Probe Test Pen Measurement
Note
：
When a negative votage appears, it is caused by the reverse connection of the test leads,and
the positions of the red and black test pen need to be changed.
