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4
Optical Alignment
Once the trial run has been successfully completed, fine optical alignment of the CLV on the conveyor line can be carried out.
Activation of the “Percent Evaluation” mode is recommended to enable the CLV to continuously evaluate the number of valid and
invalid reads and indicate the result as a percentage. With this information, the CLV can be optically aligned to obtain the most
efficient reading process.
To improve the reading efficiency of the CLV, check the following:
Is the minimum bar thickness correctly selected?
Is the reading range on its optimum setting? If the reading distance fluctuates, does it
stay within valid limits?
Is the reading angle of the scanner acceptable?
Is the scanning frequency set for optimum performance?
Is the start/stop ratio correct?
Is the trigger source triggering properly?
For data transmission: are the host interface parameters correctly set?
Was the correct function selected for the auxiliary interface?
Indicator LEDs
Figure 4-1 shows the indicator light panel of the CLV. There are four indicator lights: “Device Ready,” “Result,” “Laser On” and
“Data.” These are explained below:
The “Device Ready” LED indicates that the scanner is in the reading mode. When the
scanner is powered up, the reading mode is automatically activated.
Note: If the “Device Ready” LED does not light upon power-up, this is an indication that
the scanner has failed its system self test.
The “Result” LED can be programmed to go on or off based on the following conditions:
Good Read, No Read, Match 1, Match 2, Mismatch 1, Mismatch 2, No Match, etc. See
Section III-”Parameterization: Device Configuration: Result Output.” Default setting is
Good Read.
The “Laser On” LED is activated when a reading gate is triggered and the laser diode is
activated.
The “Data” LED is lit when the CLV transmits data to the host device via the host inter-
face.
Device Ready
Result
Laser On
Data
Figure 4-1 Indicator LEDs
