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Lets say that a load cell has these specifications:

  • Rated Load = 500 g
  • Rated output = 1 mV/V
  • Excitation voltage = 12 V
  • Creep = 0.02 %FS / min

Then the output range should be 0--12 mV.

Does %FS mean out of the maximum of the output voltage range? That is FS = 12 mV

Then the creep could be converted to 0.0002 * 12 mV/min = 2.4 μV/min?

EDIT: Of course it should be 0.0002 * 12 mV/min and not 0.02 * 12 mV/min. But then I got the original question answered, FS stands for the maximum rated output voltage.

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  • \$\begingroup\$ Of rated (maximum) load, whatever output voltage corresponds to. \$\endgroup\$ – DKNguyen Sep 14 '20 at 14:48
  • \$\begingroup\$ No, creep is 0.02% of 12mv/min, not 0.02 * 12mV/min. \$\endgroup\$ – user_1818839 Sep 14 '20 at 14:54
  • \$\begingroup\$ Well if you got your question answered, upvote and/or accept the answer. \$\endgroup\$ – user_1818839 Sep 15 '20 at 22:36
  • \$\begingroup\$ @BrianDrummond Your comments were the ones which answered my questions. Andy's answer showed what percentages are, not answering the original question. \$\endgroup\$ – Robin Hellmers Sep 16 '20 at 12:40
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If full-scale is 12 mV then 0.02% of 12 mV is 2.4 μV.

  • 100% = 12000 μV
  • 10% = 1200 μV;
  • 1% = 120 μV
  • 0.1% = 12 μV
  • 0.01% = 1.2 μV

So after 1 minute, you might expect a reading of (say) 1 mV to creep to 1.0024 mV or 0.9976 mV.

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  • \$\begingroup\$ The original question was not meant to be about percentages, that was just a typo. See edit note of post. \$\endgroup\$ – Robin Hellmers Sep 14 '20 at 15:59
  • \$\begingroup\$ @RobinHellmers you are confusing me. I'm not a mind-reader so telling me it wasn't meant to be about this or that tells me nothing about what it was meant to be about. See this if the question is answered. \$\endgroup\$ – Andy aka Sep 14 '20 at 16:03
  • \$\begingroup\$ ”Does %FS mean out of the maximum of the output voltage range?” \$\endgroup\$ – Robin Hellmers Sep 14 '20 at 16:18
  • \$\begingroup\$ Yes it does mean that. FS = full-scale. \$\endgroup\$ – Andy aka Sep 14 '20 at 16:21

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