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

Testing the
Adjustment
7-30 System Maintenance
To test the sensitivity of the plate sensor switch:
Step Action
1 Place the reaction plate in the input stack 1 of the plate handler.
2 Turn on the 7900HT instrument, the plate handler, and the computer.
3 From the Start menu, select Programs > Zymark Twister Plate Handler > Twister.
The Zymark Twister Software launches.
4 Click Manual Control.
The software displays the Manual Control dialog box.
5 Click stack 4.
Click
The plate handler arm moves over the input stack.
6 Click Find Plate.
If the adjustment was successful, the plate handler arm will lower upon the plate
until the plate detector switch engages confirming the presence of the plate.
If plate handler arm emits a grinding sound, adjust the plate sensor switch as
follows:
a. From the Zymark Twister Software, click Vertical Home to raise the plate handler
arm.
b. TurnthethumbscrewintheDowndirection10steps.
c. Repeat step 6 until the plate handler arm successfully detects the plate.
7 Click Close Gripper, then click Vertical Home.
If the adjustment was successful, the plate handler arm will grasp the plate and
remove it from the plate stack.
If plate handler arm stops before the gripper fingers are able to contact the plate
and fails to grasp or pick up the plate, adjust the plate sensor switch as follows:
a. Turn the thumb screw in the Up direction 10 steps.
b. Grasp the plate with one hand and, from the Zymark Twister Software, click
Open Gripper to release the plate.
c. Replace the reaction plate into input stack 1 of the plate handler.
d. Repeat steps 6 and 7 until the plate handler arm successfully retrieves the plate.
8 Grasp the plate with one hand and, from the Zymark Twister Software, click Open
Gripper to release the plate.