Ac Voltage Offset - Keithley 2010 User Manual

AC voltage offset

The Model 2010, at 5
volts with the input shorted. This offset is caused by the offset of the TRMS converter. This offset
will not affect reading accuracy and should not be zeroed out using the REL feature. The follow-
ing equation expresses how this offset (V
Displayed reading
Example: Range = 1VAC
Offset = 100 counts (1.0mV)
Input = 100mV RMS
Displayed reading
Displayed reading
Displayed reading
The offset is seen as the last digit, which is not displayed. Therefore, the offset is negligible.
If the REL feature were used to zero the display, the 100 counts of offset would be subtracted
from V , resulting in an error of 100 counts in the displayed reading.
IN
See Section 3 for information on the configuration options for DC and AC voltage
measurements.
digits resolution, will typically display 100 counts of offset on AC
) is added to the signal input (V
OFFSET
2
( ) (
= V + V
IN OFFSET
2
( ) (
= 100mV + 1.0mV
( ) ( ×
= 0.01V + 1 10
= 0.100005
Basic Measurements
IN
2
)
2
)
6 –
)
V
2-19
):