说明：  Protection Limit is 200 Vpk for all of the terminal pairings: LO sense to LO input HI sense to LO input HI sense to LO sense
(LO to Ground Protection Limit. The LO input terminal can safely "float" a maximum of 500 Vpk relative to ground. As is implied by the above limits, the Protection Limit for the HI input terminal is a maximum of 1500 Vpk relative to ground. Current Input Terminal. The current input ("I") terminal has a Protection Limit of 3A (rms) maximum current flowing from the LO input terminal. Note that the current input terminal will be at approximately the same voltage as the LO terminal. Note: The current-protection circuitry includes a fuse on the rear panel. To maintain protection, replace this fuse only with a fuse of the specified type and rating. Sense Terminal Protection Limits)