Fluke 8060A Instruction Manual page 54

8060A
Instruction Manual
Remember that even though the REL indicator appears on the display almost
instantaneously after the REL button is pressed, the relative reference is not
stored until the next measurement takes place. For most functions, the time
between measurements is about 0.4 seconds (frequency measurements occur
every second, and dB measurements occur about every 1.4 seconds).
A typical way to use the relative reference is to correct for test lead
resistance. Although test lead resistance is usually very small (typically 0.5
to 5 ), it can be significant when measuring low resistances. To correct for
it, select the desired resistance range, short the test leads together, and press
the REL button. The REL indicator will appear and the display will read
zero. The 8060A will automatically subtract the stored test lead resistance
from subsequent measurements. Other common applications for relative
reference include: offset nulling (dc and ac voltage or current), amplifier
matching (dB), power line frequency deviation (Hz), diode and transistor
matching (diode test), resistor matching ( ), and voltage deviation (ac and
dc voltage).
The use of the relative function with the autoranging k ranges is
restricted to the autoranging k ranges. If you take a reference
reading within the autoranging k range and then use it as a
reference outside autoranging k , or use a reference reading taken
outside autoranging k within autoranging k , errors will result.
There is no restriction on the use of the relative function with the
fixed resistance ranges or with autoranging M .
2-26
Note