Printronix Online Data Validator - Manual (Page 47)

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Operation
Basic Validator Setup
Unit Positioning
The validator must be positioned so that the scanning beam covers
the entire area containing the bar codes, including the area
required for quiet zones. The beam width can be moved
horizontally to the left or right (see “Shifting the Scanning Beam” on
page 41).
If a bar code is completely outside of the scanning area, straddles
an edge, or does not pass completely under the scanning beam,
the validator interprets it as a missing bar code and generates error
conditions.
Validator Front Panel
The front panel of the validator has the following controls and
indicators:
• POWER: Indicates the validator is at full power.
• CALIBRATION: Flashes when the validator is in calibration
mode. See page 42 for calibration instructions.
• READ: Flashes when the validator is reading a bar code.
• 1 and 2: Used for maintenance purposes only.
• RESET: This button has three functions, depending on how
long you hold the button down. See Table 3 on page 48.