The resistance value is decreasing

QI'm measuring fuse resistance using the RM3544A. However, the resistance value decreases gradually. What is the cause?


This is due to one of the following reasons:

1.  Effect of temperature
The RM3544 measures resistance by flowing constant current using the 4-terminal method.
The resistance changes because of the change in temperature via heat on DUT and/or the environment (air-conditioning, wind, etc.)

2.  Contact condition
The contact pressure of measurement probes has changed.