General Metrology Forum

Accuracy and resolution

Picture of Rowan Sylvester-Bradley
Accuracy and resolution
by Rowan Sylvester-Bradley - Sunday, December 16, 2018, 10:46 AM

When specifying the accuracy of a measuring device, is it standard to include half the resolution to the underlying accuracy of the measuring system, or is it expected that the user will add this?

For example, if a device is specified as having an accuracy of +-(1% + 1g), and has a resolution of 10g, if the device reads 340g, are the limits of the actual weight of the item 305 to 375g, or are they 300 to 380g?

Thanks - Rowan