This standard specifies the test methods for measuring grating digital display meters. This standard applies to digital automatic displacement display instruments for optical measuring instruments that use measuring gratings as detection elements.
JB/T 9341.2-1999 history
2014JB/T 9341.2-2013 Metrology grating part 2: digital display meter (card)
1999JB/T 9341.2-1999 Metrology grating technology.Test method of digital display meter