Agilent Technologies 8453 User Manual, Installing And Operating Manual page 93

To replace the Valve
1 Unpack the new valve. The default position of the valve when shipped is
Drilling
Valve drive assembly
Figure 36
2 If the valve drive assembly is not in position 1—switch to manual operation
Some earlier models of the valve drive assembly turn continuously when the valve is not
N O T E
fitted. Place and hold a screwdriver in the slot to provide mechanical resistance. Do not turn
the screwdriver.
3 If the valve drive assembly is in position 1—turn off the valve-pump
The shaft has some lateral movement because of its coupling.
N O T E
Agilent 8453 Dissolution Testing System Installing and Operating Manual
position 1.
Underside of Valve
and press the manual advance button to set the valve drive assembly to
position 1.
controller, then insert new valve with the drilling facing downwards and the
flat side at the end of the axis is in an upward position.
Replace and tighten the two screws. Turn on valve-pump controller and
check operation.
Using the Valve Unit and Valve-pump Controller
Troubleshooting Your Valve System
4
93