NCR 7870 manual Calibration, General

Chapter 5: Calibration

General

This chapter describes when and how to calibrate the NCR 7870 scanner/scale models and how to verify that the calibration is correct.

Please note, this chapter pertains to the NCR 7870-2000 and 4500 ONLY. The NCR 7870-4000 does not require calibration. In the event calibration is needed, contact the NCR Service Center. The 7870-4000 has NO user serviceable scale parts or calibration procedure.

During factory testing, the scale is calibrated one or more times to test the scale calibrating function. This calibration test is not sufficient to make the scale ready for weighing in commerce. To be in compliance with governmental Weights and Measures regulations, you must be certified to perform the scale calibration procedure and place the scale into service for trade.

You MUST calibrate the scale when any of the following occurs.

•Initial installation of an NCR 7870 Scanner/Scale

•When scale cannot be zeroed even after a power down/up sequence

•When the diagnostics indicate a calibration error that persists after a power down/up sequence

•When the Load Cell or Scale Board have been replaced

Note: Your scanner/scale may or may not have an Integrated Display or an NCR 7825 Remote Display when connected to some host terminals. If this is the case, a Field Service Calibration Display (NCR part number 250-0029750) is required unless your NCR 7870 has the optional Voice Messaging feature enabled. Calibration information is NOT sent to the host terminal.