Signal Input Limits; Overrange Indicator - Fluke 8060A Instruction Manual

If you are taking a measurement and the OL symbol appears on the display
(Figure 2-5), an overrange condition is indicated, meaning that the input is
higher than the range selected. You should select a higher range for the
measurement. The OL symbol does not necessarily mean that the instrument
is being exposed to a damaging input condition. For example, when
measuring resistance, an open input will cause OL to appear.

2-8. Signal Input Limits

Exceeding the maximum input overload limits can
damage your instrument.
Before you begin to use your 8060A, it is important to note the maximum
inputs that may be applied to the instrument. Table 2-2 presents the
maximum inputs that are allowed for each function, range, and input
terminal.
To avoid electrical shock and/or instrument damage, do
not connect the common input terminal to any source
more than 1000 volts dc or rms ac above earth ground.
Figure 2-5. Overrange Indicator
Caution
Warning
Operating Instructions

Signal Input Limits

2
dx07f.eps
2-9