Applied Biosystems 7900HT User Manual page 283

Applied Biosystems 7900HT Fast Real-Time PCR System and SDS Enterprise Database User Guide
5. Loosen the black positional adjustment knob on the fixed-position bar code
reader, and position the scan head of the reader as far as possible from the plate
while maintaining the orientation towards the bar code on the plate (see below)
6. While watching the Terminal dialog box, slowly adjust the orientation of the
fixed-position bar code reader until the percent successful reading displays the
highest number possible.
It may be helpful to briefly place a sheet of white paper in front of the
Note:
plate bar code to view the area scanned by the laser.
7. When satisfied with the alignment, tighten the black positional adjustment knob
on the fixed-position bar code reader.
8. Restore the fixed-position bar code reader to normal operation:
a. In the Edit Configuration dialog box, change from Test back to Serial on
Line.
b. In the Device Control dialog box, confirm that EEPROM is still selected,
and click Send.
c. In the New Decision dialog box, click YES to save to EEPROM.
The bar code reader stops scanning the plate bar code and resumes normal
operation.
9. Click Exit ( ) to quit the LDHOST window.
The LDHOST window closes.
10. Replace the cover for the fixed-position bar code reader (from
page 7-49).
Aligning the Fixed-Position Bar Code Reader
Scan head of the fixed-position
bar code reader
Black positional
adjustment knob
Percent successful reads
Mode drop-down list
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