The older Fluke 1652 was a non-trip loop test with the three wire method as sparkyork pointed out. The original Fluke 1650 series testers were never advertised as having a high current loop test option, although it did mention it in the manual (two wire method is a "way" of carrying out a high current loop measurement).
When the Fluke 1652B was launched, the specification made clear that there were two options for loop testing, both high current and non-trip. The "B" version also added a variable RCD setting, that allows you to customise the RCD test and a pass / fail indicator for the RCD.
In addition the later "C" version then added phase rotation.
In short, the Fluke 1652 original model will perform a non-trip earth loop test, if you want a copy of the old and new manuals, drop me a PM and I can send them over for you.