Other uses for a ProTrack Scanner

[jvthorsley]

A question Curtis
In my other contribution to this Forum "Manual versus Automated PCB Testing" using the output from the Scanner connected to a DMM+ the Scanner utility on the ProTrack menu to quickly make resistance measurements though the 64-way IDC connector.
As the Relay contacts are isolated could the above configuration be used on a live TTL logic circuit to check voltages on IC's with an IC clip? Or on circuits say up to 12 V.D.C. or A.C.?

[admin]

Hmmm... I don't see why not. The current levels should be pretty low. The max voltage rating for the contacts on those relays was 200V though I would not risk going to that high.

[jvthorsley]

Thanks Curtis
Using my Agillent 34410A DMM I don't think would take much current on voltage measurements.

[admin]

Update to this test method developed by James--

It is possible to use Huntron Workstation to control the scanning with this setup.

The ProTrack is connected to the Scanner by the interface cable only and a Workstation supported DMM test line can be connected to the Scanner Channel A BNC connector. The COM connection on the DMM is connected directly to a common line that goes one side of all resistors on the fixture. The Channel A Scanner interface is connected to the fixture through a ribbon cable.
The test in Workstation is setup to use the Scanner as the Connection Type (set at the Component level).

The advantage here is that Workstation can be used to store and compare the measured DMM values captured through the ProTrack Scanner essentially using it as a switch matrix.

There is a tutorial on the Huntron website that discusses using a DMM with Huntron Workstation:
https://huntron.com/sales-support/download/workstation-tutorial-dmm.pdf

[jvthorsley]

With help from Curtis I have used this method to test a number of circuit boards as I discussed on the Forum, but this time using Workstation to store the results.
Particularly useful useful for finding high resistance shorts between connector pins.
I found that the most reliable results against speed are obtained with a delay of 0.5 second using an Agilent 34410A +  workstation on my ProTrack + Scanner setup.
I work on agricultural circuit boards that are exposed to a damp,& dusty environment, and although only operating at 12 V.D.C. have lots of available current were a resistance of a few M Ohms, can rapidly fall to a few Ohms, and start heating up the area between connector pins.
As can be seen on my attached photo, and end up like the fire in second photo.
1 M Ohm  to 50 k Ohm short between pins can cause some strange CAN BUS faults for the Farmer.
If ever I get my hands on a 3200S, would be interesting to find the output from the relays and see if the same thing can be done. That is if it uses a similar internal setup?
If anyone wants details the adaptor used for this test just reply here.