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TOP
5 Digital Multimeter User Questions
Answers and Antidotes from Our Panel of Application Engineers
Specification
Conversion Chart
1 What's the difference between sensitivity, resolution, and accuracy?
SENSITIVITY ABSOLUTE AND RELATIVE ACCURACY
Specification
1%
Percent
10%
10000
Conversion Chart
PPM
100000
Digits
1
2
Bits
3.3
6.6
Specification
0.1% PPM Digits Bits 3
Percent 1000 10
RESOLUTION The smallest Absolute Accuracy: A measure of the closeness of agreement Conversion Chart
0.01% 100
10% 100000
Percent PPM
1 Digits
3.3 4
Bits
13.3
change in the input between a measured value and that of a primary standard value.
The smallest portion 1% 0.001% 10
10% 10000 100000
2 16.6 53.3 16.6
signal that can be Relative Accuracy: A measure of the closeness of agreement between 0.0001%
of the signal that 0.1% 1% 1000 3
1
10000 10
2 66.6 19.9
detected. On the a measured value and that of a locally referenced standard value.
Max. Gain
can be measured 0.01% 0.1% 100
0.00001% 4
1000
0.1 13.3 10
3
7 23.3
100mV range, this Error
and displayed on any Offset
Relationship Between Offset and Gain Errors 0.001% 0.01% 10 1005 16.6 13.3
4
DMM is capable of Error 0.000001% 0.01 8 26.6
range. The resolution 0.0001% 0.001% 1 10
6 19.9 16.6
5
sensitivity down to Max. Gain
Max. Gain
on this Model DMM7510 Error 0.0000001% 0.001 23.3 19.9
0.00001%
0.0001%
0.1
1
7
6 9 29.9
tens of nanovolts (nV). Error Max. Gain
0.00001% 0.1 7 23.3
7.5-digit DMM, 100mV Offset
Error Offset
Error
0.000001% 0.01 8 26.6 26.6
0.000001% 0.01 8
range is 10nV. On the 0%
Error
50% 100% Max. Gain Max. Gain 0.0000001% 0.001 0.001
9 29.9 29.9
Error 0.0000001% 9
1V range it is 100nV. Full Scale Full Scale Full Scale Error
0% 50%
0% 50%100% 100%
Full Scale Full Scale
FullScale Full Scale
Full Scale Full Scale
DMM Accuracy Specifications
DMM Accuracy Specifications are given as % or PPM of reading (Gain) and range (Offset).
ACCURACY AND REPEATABILITY are given as % OR PPM of reading and range.
DMM Accuracy Specifications
DMM Accuracy SpecificationsOR PPM of reading and range.
are given as %
= are given as % OR PPM of + PPM of range.
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