FIG. 1 is an oblique view of a first variant of the portable test instrument, showing my new design;
FIG. 2 is a front elevation view thereof,
FIG. 3 is a right side elevation view thereof,
FIG. 4 is a left side elevation view thereof,
FIG. 5 is a top plan view thereof,
FIG. 6 is a rear elevation view thereof,
FIG. 7 is a bottom plan view thereof,
FIG. 8 is an oblique view of a second variant of the portable test instrument, showing my new design;
FIG. 9 is a front elevation view thereof,
FIG. 10 is a right side elevation view thereof,
FIG. 11 is a left side elevation view thereof,
FIG. 12 is a top plan view thereof,
FIG. 13 is a rear elevation view thereof; and,
FIG. 14 is a bottom plan view thereof.
The lightweight broken line portions are included to show environmental unclaimed subject matter only and form no part of the claimed design.