Agilent Technologies Truevolt Series Operating And Service Manual page 58

Limit Indications
The display uses colors to indicate limits and limit violations.
Trend Chart (34461A only)
The limit area is shown in light red on the graph. The limit borders are green (shown below) as long as the limits have
not been exceeded.
When a limit is exceeded, the border turns red. In the image below, the top border is still green, but the bottom border
has changed to red because the trend line has gone into the lower limit area.
The border will remain red even if the trend line moves out of the limit area. When the trend line is within limits, you
can reset the borders to green by pressing Clear Condition.
Note also that the number of the newest displayed measurement, +09.994 VDC below, indicates whether the
measurement is within limits. Because the limit is 10 V, the 9.994 VDC value is shown with the standard background.
In contrast, the 11.083 VDC reading is highlighted in red to indicate that it is outside the limits.
58 Agilent Truevolt Series DMM Operating and Service Guide