136 34410A/11A 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 mV
10 VDC 1 VDC 0.0015 ±15 mV
10 VDC 0.1 VDC 0.0015 ±1.5 mV
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