Step 3.  Drill the USB Hole

The USB interface is used to both program the DRO-550 and to interface the DRO with a PC to control its functions.  The hole for the USB exits the case on the keypad side of the front panel.  This is the right side when viewing the DRO from the front.  Drill a hole for the USB connector at the position shown in the drawing below.

DRO-550 Side Panel Drawing (Click for PDF)