NCR 7870 User Manual page 6

iv User's Guide
Chapter 4: Installation
Chapter 5: Calibration
NCR 7870-4000 & 4500 Models ........................... 3-32
Getting Started .............................................................. 4-1
Reporting a Damaged Unit.................................... 4-1
What's in the Box.................................................... 4-1
Cable Verification ................................................... 4-2
Checkstand Verification......................................... 4-2
Installing Unit in Checkstand ...................................... 4-3
Instructions ............................................................. 4-3
Install Cables....................................................... 4-3
Determining if the Unit is Operational ....................... 4-8
NCR 7870-1000 and 3000 Scanners........................ 4-8
NCR 7875-2000, 4000, and 4500 Scanner/Scales .. 4-8
If the NCR 7870 Does Not Pass Level O
Diagnostics.............................................................. 4-8
Checkout Reading Operation ................................ 4-9
Programming.......................................................... 4-9
Determining Communications Protocol ................... 4-10
Scale Address for IBM ................................................ 4-11
General .......................................................................... 5-1
Calibration Procedure .................................................. 5-3
Section 1: Exercising the Scale .............................. 5-3
Section 2: Accessing the Calibration Switch ........ 5-4
Section 3: Connecting the Field Service
Calibration Display ................................................ 5-7
Section 4: Performing the Calibration .................. 5-9
Verifying Calibration.................................................. 5-11
Procedure 1: Increasing Load Test ..................... 5-12
Procedure 2: Over-Capacity Test........................ 5-13