180
E1412A Multimeter Specifications
To Calculate Total Measurement Error
Each specification includes correction factors which account for errors present due to operational limitations of
the multimeter. This section explains these errors and shows how to apply them to your measurements. Refer to
the section titled “Interpreting Multimeter Specifications” beginning on page 182 to get a better understanding
of the terminology used and to help you interpret the multimeter's specifications.
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 23°C
5°C 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.
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.
Range
Input Level
Range Error
(% of range)
Range Error
Voltage
10Vdc
10Vdc
0.0015
150
V
10Vdc
1Vdc
0.0015
15
V
10Vdc
0.1Vdc
0.0015
1.5
V
Range
Input Level
Range Error
(% of range)
Range Error
Voltage
10Vdc
10Vdc
0.0004
40
V
10Vdc
1Vdc
0.0004
40
V
10Vdc
0.1Vdc
0.0004
40
V
Summary of Contents for Agilent E1412A
Page 2: ......
Page 10: ...8 Contents Notes...
Page 14: ...12 Notes...
Page 15: ...13 Notes...
Page 16: ...14 Notes...
Page 26: ...24 Agilent E1412A Multimeter Module Setup Chapter 1 Notes...
Page 194: ...192 Agilent E1412A Multimeter Error Messages Appendix B Notes...
Page 201: ...Index 199 Index Agilent E1412A User s Manual and SCPI Programming Guide...
