What Affects Accuracy - HP 5528A User Manual

Figure 9-7
SUGGESTED ROUTINE FOR POSITIONING OPTICS
(See Pa ge 9-11 )
Model 5528A
Flatness Measurements
9- 12
WHAT AFFECTS ACCURACYl
Refer to Section 8, "ANGULAR MEASUREMENTS", for
it
description of potential errors, and how
to insure adequate accuracy, when usin g the Angular Optics.
A build-up o f dust or dirt on the measuring surface can cause error in your Flatness
measurement. Be sure to clean the measurement surface thoroughly.
If you move a Surface Plate to calibrate it. be sure you allow it s temperature to stabi lize before
you measure ils flatn ess.