ExLRT FAQs

We’ve answered some of the most commonly asked ExLRT FAQs here.  If you can’t find an answer to your ExLRT query then please get in touch with us.

What is the ExLRT?

ExLRT is an intrinsically safe loop resistance tester (LRT).  It’s specified by The Boeing Company in their Aircraft Maintenance Manuals (AMM) and is a lightweight tool designed for use in MRO facilities.  You can learn more about the ExLRT on the product page here.

Can I use my BLRT loop and joint cables on the ExLRT?

Although both products use the same MK52 couplers, it is not possible to use a BLRT loop or joint cable on an ExLRT or vice versa. Although the cables look the same, the connectors are different which means they can only be used for the specific product they’re designed for.

ExLRT uses couplers but they look like clamps – what’s the difference?

Clamps are mechanical items which use a physical pressure to pass electrical signal into the UUT (like two wires soldered together).  Clamps are therefore used for DC bond testing – we use 1A, 10A and 150A bond clamps.

Couplers magnetically transfer an electrical AC signal into the UUT.  They’re used for AC non-intrusive testing of loops and joints because they can pass the current across air gaps.  We use MK52 couplers for these measurements and tests.  The commonly used i400 clamps are actually couplers, which is confusing!

Have more ExLRT FAQs?

If you have any more questions please just ask us and we’ll be happy to help.  You can also find more ExLRT articles in our blog; useful documentation and help guides are on our resources page.