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MS840 

Quick Start Guide

Connecting and disconnecting the interface cable

An audible “click” sound indicates the interface cable has been plugged in correctly and the connector lock is engaged. To unplug the interface cable, 

release the connector lock by inserting one end of a paperclip into the handle. 

SETUP AND INSTALLATION

Plug the interface cable into a free USB port of a host computer. The 

MS840 is now ready to use. 

Connecting USB cable to a host

The Unitech MS840 Laser Scanner

Installation Instructions & Popular Configuration Settings

The following steps will walk you through the installation process.

Flash Mode

Scan here to switch to Flash Mode from the default Trigger Mode. In 

Flash mode, the MS840 will function automatically. It will scan at a set 

interval.

Flash Mode

If you wish to switch from the default Enter Mode to Tab Mode, scan 

the top barcode then the bottom barcode. In this mode, data will tab 

over to the next column as you scan instead of jumping to the next line. 

Scan here to switch back to Trigger Mode. In Trigger Mode, the MS840 

will scan only when the scanner button is pressed. 

Trigger Mode

Trigger Mode

Tab Mode

Tab Mode

SETTINGS AND CONFIGURATION

The  following  section  covers  the  most  common  configuration 

settings for your MS840 scanner. 

For 

additional 

configuration 

options 

please 

visit 

unitechscanners.com/MS840

 and select the “Download” tab. 

You will find the User’s Manual and a variety of other resources. 

Open a word processing program such as Microsoft Word or Notepad 

on your host. Now scan the following barcode:

Test & Finish

If the word “Unitech” appears on the screen you have succesfully 

installed your scanner. Congratulations!

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