0

How can I connect the 5520A with 3-point Digital Resistance Tester?

Hello

I have problems when i try to calibrate one 3-point Digital Resistance Tester, such as EXTECH 382152, because the resistance tester has 3 points to connect (E, P and C), and 5520A has 2 point in the terminals Normal Hi and Normal Lo.

I have connected the Extech with only one single resistence, but I connect the terminal "P" to "C" and the terminal "C" to one side of the resistance, and the terminal "E" in the another side of the resistance, so when I measure the resistance I got 9.84 Ohms, but in the 5520A 17.35 Ohms.

By the other side when I measure the single resistance with my 8508A it measure 10.07 Ohms and when I measure the resistance in my 5520A with the 8508A it measure 10.04 Ohms.

So my 5520A and 8508A are OK and they are calibrated recently and the single resistance is OK too. I thing that I have to configure something in my 5520A in order to connect the Extech.

My question is, what is the propper conexion/configuration in both instruments (5520A and Extech 382152)? 

Your answers will be well receive.

Regards.

6 comments

Date Votes
0
Avatar
Michael Johnston

What if you connect in 4-wire mode, with E connected to 5520 LO and AUX LO, C connected to 5520 HI and P connected to 5520 AUX HI? The C connector should be the one sending the measurement current, and the P is making the sense measurement, I would imagine.

0
Avatar
Héctor Alejandro Raimundo Cabrejo

I just connected like that but the results are the same

0
Avatar
Harry Cole

I think I would try "C" to the 5520A HI and "P" and "E" together to the 5520A LO.

0
Avatar
Michael Johnston

Do you have other resistance standards you could use? I tend to use decade boxes for this kind of UUT since the simulated resistance can be tricky.

0
Avatar
Héctor Alejandro Raimundo Cabrejo

Harry I have try that conexion but the results are 0, do you know another procedure to calibrate the resistance tester with 5520A?

Yes dmjohnston i have thought to buy one decade box but i don't have it right now.

0
Avatar
Tyson Wheeler

I have experienced this problem before.  You will need to use a decade box.

Please sign in to leave a comment.