Verdicts

Every reading gets one of three verdicts against the expected range. The icon and the word always appear together.

Verdict	Looks like	Means
In range	Blue, circle	Inside the expected range, a bound included.
Check	Amber, triangle	Just outside a bound, within that bound's check margin. Worth a second look. The fault tree decides what comes next: on most steps it carries on as In range does, and on some, such as the rails on a power walk, a Check is followed up the way a Fault is.
Fault	Red, octagon	Beyond the check margin. The session follows the fault.

A range with only one bound ("At least 2 kΩ") judges only that bound. An open reading (OL) takes whatever the fault tree says OL means at that point: a fault on a diode check, in range on a resistance check where open is healthy.