I mean, the voltage dropped. The connection is still holding but loose. We did manual checking by visual to locate the splice.
I want to include a gate check during QAQC using this equipment, workers here cannot be trusted.
If the cable is exposed, the Wilcom T124 instrument would be of value in assuring the shield splice integrity before coverup. The T124 requires physical contact with the spliced area of the cable to perform the testing.
3M Dynatel also has several models that will test for sheath/shield integrity/faults.
A TDR would would be very useful if there is not physical access to the cable splice or if you needed to locate splices, test for faults or other anomolies on buried or otherwise inaccessible conductors after installation.
If the connection is "still holding but loose" it
will fail and most likely fail under load.
What splicing kit are your workers using?
All that being said, if your workers are not trustworthy will procuring a new test instrument for their use make them trustworthy?
GoldDigger is correct about a poor splice being easier to spot than a good splice on a TDR, but most splices are visible on the display, even to the inexperienced.