FIG. 1 is a top, front right perspective view of a proving unit for use with electrical test tools showing my new design.
FIG. 2 is a bottom, rear left perspective view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a right side elevation view thereof.
FIG. 5 is a left side elevation view thereof.
FIG. 6 is a top plan view thereof.
FIG. 7 is a bottom plan view thereof.
FIG. 8 is a rear elevational view thereof.
FIG. 9 is a top, front right perspective view of another embodiment of a proving unit for use with electrical test tools showing my new design.
FIG. 10 is a bottom, rear left perspective view thereof.
FIG. 11 is a front elevation view thereof.
FIG. 12 is a right side elevation view thereof.
FIG. 13 is a left side elevation view thereof.
FIG. 14 is a top plan view thereof.
FIG. 15 is a bottom plan view thereof; and,
FIG. 16 is a rear elevational view thereof.
The broken lines in the figures illustrate environment only and form no part of the claimed design.