Well, since its a LTZ1000 and its the cream of the measurement world, an good idea would be to use a over the top protection system that destroys accuracy, like the full heavy RLC filter, Fast Diode, TVS, GDT, Fuse, with a relay or switch across it, so you can connect it then shunt the protection network after you are sure its ok, then reapply the protection before disconnecting.
actually since it has stuff connected to ground it would be better to just disconnect that bit from the circuit.