| Products > Test Equipment |
| Accuracy spec. interpretation |
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| Karel:
Hi everybody, I need to check a DC voltage in the mV range with a Keysight 34461A. The DC voltages produced by the DUT are: -2, -1, 0, 1 and 2 mV. The accuracy of the DMM is 0.0065 % of reading plus 0.0035 % of range (100 mV, it's the lowest range available on the DMM). Unfortunately, 0.0065 % of 100 mV is too much inaccuracy. Because I'm only interested in the relative accuracy (the step difference between the different output voltages), may I ignore the accuracy specified for the range and apply only accuracy specified for the reading? Is my assumption that the accuracy specified for the range is related to DC-offset errors only, wrong? To give an example: I measure the values with the output of the DUT at 1 mV and at 0 mV. Can I assume the accuracy is (0.0065 x 2) percent of the difference of the two measured values? |
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