Medrad ProVis Mark V, Руководство по обслуживанию

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Mark V ProVis Injection System
16 - 28
Injector Head
- Mechanical Stop Limit Switch
Mechanical Stop
Limit Switch
Removal 1. Disassemble the injector head.
2. Desolder the wires from the limit switch.
3. Remove the limit switch and bracket from the injector head.
Mechanical Stop
Limit Switch
Replacement 1. Assemble the replacement limit switch with bracket and solder wires
as shown below:
Figure 16.8: Mechanical Stop Limit Switch
2. Install replacement switch with switch plunger positioned over the
center of the acme screw ball. Push the switch plunger into the acme
screw ball until the switch contacts close (a clicking sound can be
heard on switch closure). Secure with the two mounting screws previ-
ously removed.
3. Install cable ties as required to keep limit switch wires away from
moving parts.
4. Apply power to the system. Install turret (if applicable) and activate
forward load. If there is no forward movement, repeat step 2 above.
Readjustment of the bracket/switch position may be required.
5. Reverse piston to the rear limit. Enter the following parameters:
5.0ml/sec., 10 ml volume, and 100 psi. Arm the injector. After the
mechanical stop plate is in position, disable the mechanical stop
motor by disconnecting one of the motor leads. Disarm the injector.
Activate forward load until the piston plate makes contact with the
mechanical stop plate. When the unit begins beeping, activate
reverse load to the rearward limit. Reconnect the lead removed from
the mechanical stop motor, allowing stop to return to standby position
at 0 ml. Apply Loctite 242 (or equivalent) to limit switch bracket to
secure switch.
5. Reassemble the injector head. (See the procedure on Page 16 - 13.)