12-09-2016, 10:37 PM
Hi There,
I am relatively new to the rail industry working primarily on Manchester Metrolink and do not have a background in testing. I am wondering if someone can explain strap and function testing to me. Internet sources regarding the subject seem convoluted.
as an example;
If i place a voltage on a set of motorised points detection relay (so in effect mimiking that the points are set in reverse) and then monitor the PPI position is this strap and function testing?
Would this type of test be done by a functional tester or a principle tester?
I imagine its a functional tester as it only tests one small part of the system and verifys that the circuit is built to design rather than validating that the design is fit for purpose and safe to signalling standards.
If this is a functional tester then what is the principle tester responsible for? does he check any part of the electrics or is he more concerned with the 'function'. e.g If my interlocking is set to a particular route do the protecting signals reflect this? Would he test axle counter points blocks to ensure the points remain locked until the block is traversed and that they are positioned in order that the points have enough time to throw? (again this seems like functional test)
Basically, if someone could give me a principle testing example explained at a basic level i'd appreciate it.
Thanks,
Lee.
I am relatively new to the rail industry working primarily on Manchester Metrolink and do not have a background in testing. I am wondering if someone can explain strap and function testing to me. Internet sources regarding the subject seem convoluted.
as an example;
If i place a voltage on a set of motorised points detection relay (so in effect mimiking that the points are set in reverse) and then monitor the PPI position is this strap and function testing?
Would this type of test be done by a functional tester or a principle tester?
I imagine its a functional tester as it only tests one small part of the system and verifys that the circuit is built to design rather than validating that the design is fit for purpose and safe to signalling standards.
If this is a functional tester then what is the principle tester responsible for? does he check any part of the electrics or is he more concerned with the 'function'. e.g If my interlocking is set to a particular route do the protecting signals reflect this? Would he test axle counter points blocks to ensure the points remain locked until the block is traversed and that they are positioned in order that the points have enough time to throw? (again this seems like functional test)
Basically, if someone could give me a principle testing example explained at a basic level i'd appreciate it.
Thanks,
Lee.