how do I connect it
There are a couple different methods out there.
May I ask why you need to do this? Is it to prove something for an inspector, or for code compliance?
to check resistance on ground rods for static grounding for military fueling systems for aircraft
I am sorry but that gets into areas that I am afraid to tred into. Anything aircraft I stay away from as the specs are tightened severly compaired to housing electrical which I am familliar with.
Unfortunately you will not be able to use this meter to do the testing for aircraft specs. One moment and I will get you the equipment and procedures needed to do this.
Beyond this I can not help you though.
Please click here to download the military manual for the grounding of aircraft and other things.
This is the bible for what you wish to do. it contains the procedures, equipment, and refrence material to perform the installation and testing of the ground systems.
FYI: the ohms specifications go from household spec at 25M ohm to 10,000M ohms.
Please let me know if you have any other immediate concerns.