Medrad ProVis Mark V, Service Manual

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Mark V ProVis Injection System
16 - 16
Injector Head
- Plunger Position Pot
The removal and replacement of the Plunger Position Pot requires
major disassembly, reassembly, calibration and checkout of the injec-
tor head. The procedures for this operation are included here, how-
ever, we do not recommend field repair of this item, but suggest that
the injector head be returned to MEDRAD Service.
Plunger Pot Removal 1. Apply power to the injector, then ensure that the 150 ml syringe
size is selected. If 60 or 200 ml is selected, press RECALL, 50,
RECALL, then the appropriate number to select 150 ml. Set the
injector parameters as follows:
Flow Rate 10 ml/sec
Volume 10 ml
Pressure 600 psi
2. Reverse the plunger to the rear limit, then remove unit power.
3. Position the injector head (which can remain on the arm or be
placed on a padded surface) upside down.
4. Remove the four screws which retain the bottom cover, then
remove the bottom cover.
5. Remove the two hole plugs from the plunger knob and plunger
rotation lever on the rear of the injector head.
6. While holding the plunger knob, loosen the screw several turns
then remove the knob from the shaft.
7. While holding the plunger rotation lever, remove the screw inside,
then remove the lever from the shaft.
8. Remove the four screws securing the top cover. Remove the top
cover.
9. Position the injector head top side up.
10. Note the position of wires, head cable, and metal clamp. Remove
cable ties. Remove the two screws securing the cable bracket.
11. Disconnect the wires from the plunger pot.
12. Remove the two screws securing the pot bracket, then remove the
pot assembly. Retain screws and discard the old pot assembly.