ABI Prism® 7900HT Sequence Detection System ... - OpenWetWare

Aligning the Plate Handler
When to Perform Perform the following procedure if the ABI PRISM 7900HT Sequence Detection
System is moved or the Zymark Twister Microplate Handler becomes mis-aligned.
Preparing the
Instrument for the
Alignment
7-32 System Maintenance
Symptoms that the plate handler is out of alignment include:
♦ Excessive downward movement of the plate handler arm (the arm grinds when
grasping or releasing plates)
♦ The plate handler arm collides with the plate stacks
♦ The plate handler arm releases plates above the bottom of the plate stacks
♦ Reaction plates tip or tilt when placed into the instrument tray by the arm
To move the instrument tray to the OUT position:
Step Action
1 Remove the covers for the fixed-position bar code reader and the underlying
platform.
2 Loosen the three black thumb screws on the platform connecting the 7900HT
instrument and the plate handler base.
3 Move the instrument tray to the out position.
a. Launch the Automation Controller Software.
If an error dialog appears reading, ‘Machine calibration values are not valid.
Please refer to documentation for calibration process,’ click OK.
b. Click Open/Close ( ).
The 7900HT instrument moves the instrument tray to the out position,
perpendicular to the instrument.
c. From the File menu, select Exit.
The software quits the Automation Controller Software.
4 From the Start menu, select Programs > Zymark Twister Plate Handler > Twister.
The Zymark Twister Software launches.
5 Click Manual Control.
The software displays the Manual Control dialog box.
GR2009
Black thumb
screws
Fixed-position bar code reader
and underlying platform covers