User`s guide
16 
Site Requirements  
Service Access  
When routing and installing the cable(s) and power supply, make sure you leave access that these 
components may be swapped easily without the need to remove the unit from the checkout counter. 
When changing the StratosSWAP™ optics engine modules, removing the unit completely from the checkout 
counter is recommended.  
When calibrating or zeroing the scale, do not remove the unit from the checkout counter. Refer to the Scale 
Operation Section beginning on page 47 of this guide for detailed instructions on zeroing and calibration. 
Power Installation  
The Power Supply (AC/DC) should be connected to an AC Outlet that is free of electrical noise (clean). A 
qualified electrician can determine the amount of electrical noise on the AC line. See additional information on 
power installation and restrictions under the Installation: Interface section of this manual. 
Note:   A switched AC outlet is recommended. The switch should be located on the operator’s side of the 
checkout counter in close proximity to the MS2420/MS2430 to facilitate calibration and service of the 
unit. 
Checkout Counter Layout Considerations  
When placing a scanner in a checkout counter, the following factors should be considered. 
  Items should flow at a distance to the operator that maximizes comfort. The operator should not need 
to stretch or strain to reach for and scan packages. 
  The MS2420 and MS2430 can scan a bar code on five sides of a package. The packages should flow 
into the scan area that provides the maximum reading performance. No lifting or orientation of the 
items is necessary. A properly placed item diverter can maximize the flow of packages. 
  In what direction are the packages flowing? Most checkout counters are designed for left-handed 
takeaway. If the operator is facing the vertical window of the scanner, packages flow from the 
operator's right to left. The packages are in queue on the conveyor to the right and the bagging is to 
the left. 










