ITech IT5101 User Manual page 10

Inspection and Installation
Either for plane contacts or relay terminals that are not easy to clamp or small
objects like connectors, you just need to touch the test lines against the DUT for
four-terminal measurement. The meter pen can be directly unscrewed for
changing For detailed length specification, see the figure above.
The central probe of the meter pen is Sense and the outer cylinder probe is
Source terminal. The schematic diagram is as shown below.

IT-E602 Large clip type lead for small component test (Under DC600V)
It can be used to clamp thick cylinder parts of DUT and is easy for operation. To
take four-terminal measurement, directly clamp the DUT terminals. For detailed
length specification, see the figure above.
The upper-jaw probe of alligator clip is Source terminal and the lower-jaw probe
is Sense terminal. The schematic diagram is as shown below.
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