Accuracy rating:
A number of quantity defining a limit that errors will not exceed when a device is used under specified operating conditions. Accuracy rating can be expressed in a number of forms, i.e. in terms of the measured variable (+/- 1 C), percent of span (+/-0.5% of span), percent of upper range value (+/-0.5% of upper range value F.S.), percent of scale length (+/-0.5% of scale length), or percent of actual output reading (+/- 1% of actual output reading).
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