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Introduction and Identification
When using the MH941 scanner with a decoder not manufactured by Metrologic,
scanner operation is dependent upon your decoder. Since there are many decoders
available, refer to your decoder’s documentation concerning scanner
requirements and operation.
When using a Metrologic hand-held scanner with one of Metrologic’s fixed
scanners, the scanner will operate as follows:
! The IR signal extends approximately eight (8) inches beyond the output
window.
! When the unit is activated by the IR sensor, the red LED will remain on.
This is a visual indication that the scanner is beginning a sequence of
bar code recognition, decoding, and transmission.
! When an object is in the scan field, the laser will begin a sweep to
determine if a bar code is present. If a bar code is not detected within
approximately 2.5 seconds, the red LED will shut off indicating that the
laser is no longer on. To reactivate the scanning sequence, remove the
object and present another.
! When a bar code is recognized, the scanner will decode the bar code
and then transmit the data to the host system. When this occurs, the
green LED will flash and the scanner will beep when the decoding is
complete. At this time, the laser will turn off if the object is removed
from the field. However, if the object stays in the field the laser will
remain on for up to 2.5 seconds trying to detect another bar code. This
feature allows very fast consecutive scans of symbols in close proximity,
such as a wall of boxes or cartons, or bar coded menus. If the same
symbol stays in the field after a successful scan, the laser will stay on for
approximately 3.5 seconds and then turns off. This prevents
unintentional reads of the same bar code. To read the same symbol more
than once, simply remove the object from the scan field for
approximately 1 second and then the scanner can scan the same symbol
on the next pass.