Thank you for your reply.You mean the medTester 5000C, is it a safety analyzer?

Currently I only have a 454a host and I don't have these modules.

I'm learning to use the 454a analyzer properly,I found that "ACTIV" and "DISPERSIVE" are used for ESU energy analysis and RF current test. Is it correct to only connect these two interfaces?And "POWER GROUND" is generally not used?
[Linked Image]

In addition, I don't know the actual use of the "CURRENT LOOP" interface. When I press "AMMETER" on the system interface to enter, it is as shown in the figure below
[Linked Image]
And after pressing "AUXILIARY" to access, I saw the following prompt on the screen
[Linked Image]
I don't know if these are normal or if there is an error


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