NCR 7870 manual Top Plates and Scan Windows, Slot Scanner Window

Chapter 2: Features, Functions, and Kits 2-9

Top Plates and Scan Windows

Top Plates

A Top Plate provides a snag-free place to scan items and protects the internal components from contamination and liquid spills. It has an inset Lift Tab (older units may have two) which permit the Top Plate to be quickly removed or replaced with no tools. The scan window inset in the Top Plate is either diamond-coated (replaceable) or sapphire glass (permanent). When a unit has a scale, the Top Plate becomes a part of the scale system – the scale must be recalibrated when the Top Plate or any of its components, such as the scan window, are replaced.

The current line of 7870 Scanners and Scanner/Scales have been upgraded to come with the Stainless Steel Top Plate as a standard feature. Older 7870 units may have the painted steel Top Plate which is no longer available.

Slot (Horizontal) Scan

Window

Top Plate

Lift Tab

Slot Scanner Window

The (horizontal) scan window is mounted in the Top Plate. The window (if diamond-coated) is replaced by removing the Top Plate, snapping out the old window, and snapping the new window in place. The slot scanner window is available as diamond-coated glass or sapphire glass. Diamond-coated glass was formerly known as “scratch-resistant” glass. Sapphire glass is the upgrade and was formerly known as “scratch-proof” glass. Other glass options such as “hardened” and “armor” glass have been discontinued.