NCR 7870 manual Scale Features and Functions, Scale Functions and Features, Load Cell, Auto-Zero

Chapter 2: Features, Functions, and Kits 2-11

Scale Features and Functions

The scale is used in the 2000, 4000, and 4500 models. It can be manufactured by NCR or by a vendor for a specialized market such as the price-computing scale in the 4500 model to meet European standards.

Scale Functions and Features

Load Cell

The NCR 7870 uses a single load cell rather than four, which is more typical, to increase reliability. The scale has a settling time of 0.9 seconds for items weighing less than 2.3 kg (5 lbs.) It is sealed to avoid damage from spills around the unit. There are three basic types of load cells:

•For weighing in pounds. Capacity: 30 lbs.

•For weighing in kilograms. Capacity: 9.995 kg

•For weighing in kilograms. Capacity: 13.995 kg

Reset / Scale Zero

A front-mounted Scale Reset button is located on the front bezel, to the left of the vertical scan window. This flush membrane switch will reset the scale due to fluctuation from extreme temperature drift, impact, or scale tare up to:

1.0.3 kg (0.6 lbs.) relative to the zero established during the most recent power-on sequence

or

2.0.6 kg (1.2 lbs.) relative to the calibration zero, whichever is less. The scale reset function is completed in less than a second.

Auto-Zero

Scale electronics automatically tracks out stable shifts due to temperature changes and compensates in 3 g (0.006 lb.) increments up to a maximum of 0.3 kg (0.6 lbs.).