Fred,
You just can't use any type of torque wrench to check the torque of an installed electrical connection that directly involves a conductor. Checking the torque on the bolt that holds the lug to the bus or bus bar bolts is ok, but checking the torque on a conductor termination should not be done. The connection relaxs and you will get some additional movement if you use a torque wrench to check it. Once probably won't hurt anything, but some places do this once a year and that will cause problems because the conductor will be damaged.
Don
