146 34410A/11A/L4411A User’s Guide
5 Specifications
To Calculate Total Measurement Error
The multimeter's accuracy specifications are expressed in the form:
( % of reading + % of range ). In addition to the reading error and range error, you may
need to add additional errors for certain operating conditions. Check the list below to
make sure you include all measurement errors for a given function. Also, make sure you
apply the conditions as described in the footnotes on the specification pages.
• If you are operating the multimeter outside the temperature range specified, apply an
additional temperature coefficient error.
• For dc voltage, dc current, and resistance measurements, you may need to apply an
additional reading speed error or autozero OFF error.
• For ac voltage and ac current measurements, you may need to apply an additional low
frequency error or crest factor error.
Understanding the " % of reading " Error The reading error compensates for
inaccuracies that result from the function and range you select, as well as the input signal
level. The reading error varies according to the input level on the selected range. This
error is expressed in percent of reading. The following table shows the reading error
applied to the multimeter's 24
–hour dc voltage specification.
Range Input Level Reading Error
(% of reading)
Reading Error
(Voltage)
10 VDC 10 VDC 0.0015 ±150 μV
10 VDC 1 VDC 0.0015 ±15 μV
10 VDC 0.1 VDC 0.0015 ±1.5 μV
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