140 34410A/11A/L4411A User’s Guide
5 Specifications
Understanding the " % of range " Error The range error compensates for
inaccuracies that result from the function and range you select. The range
error contributes a constant error, expressed as a percent of range,
independent of the input signal level. The following table shows the range
error applied to the multimeter's 24
–hour dc voltage specification.
Total Measurement Error To compute the total measurement error, add the
reading error and range error. You can then convert the total measurement
error to a "percent of input" error or a "ppm (parts
–per–million) of input" error
as shown below.
Error Example Assume that a 5 VDC signal is input to the multimeter on the 10
V range. Compute the total measurement error using the 90
–day accuracy
specifications: ± (0.0020% of reading + 0.0005% of range).
Reading Error = 0.0020% x 5 VDC = 100
μV
Range Error = 0.0005% x 10 VDC = 50
μV
Total Error = 100
μV + 50 μV = \150 μV
=
\0.003% of 5 VDC
=
\30 ppm of 5 VDC
Range Input Level Range Error
(% of range)
Range Error
(Voltage)
10 VDC 10 VDC 0.0004 ±40 μV
10 VDC 1 VDC 0.0004 ±40 μV
10 VDC 0.1 VDC 0.0004 ±40 μV
UG_ED5.book Page 140 Thursday, March 1, 2012 11:28 AM
To Next Page
Loading...
Need help?
General
