Table of Contents
Advertisement
CT 9000 ® ADV
POWERHEAD OVERVIEW
The powerhead holds the syringe and plunger, and contains an
electric motor, gear train, and ballscrew to drive the plunger forward
and reverse. An encoder mounted to the motor shaft and a linear
potentiometer mounted to the ballscrew provide feedback to the
Power Pack about the actual velocity and position of the plunger.
The major functions of the powerhead are shown in Figure 3-9.
These major functions are described below:
3-36
To drive the syringe plunger the head transforms electrical
power into rotary motion with a motor, then into linear motion
with a ballscrew assembly.
To keep track of the plunger's velocity and position, the head
contains two feedback devices: a linear potentiometer
mounted to the ballscrew and an optical encoder mounted to
the motor shaft.
A heater blanket maintains the temperature of the fluid in the
syringe through a temperature controlling circuit.
Push-buttons allow the operator to move the plunger forward
or reverse for loading or expelling. A knob encoder provides
feedback to the powerhead CPU which informs the Power
Pack that a slow plunger movement is requested.
The head contains sensors which detect syringe size and
face plate position.
Lamps are provided which indicate when the injector is
enabled, when it is injecting and when a fault has occurred.
A three digit LED display indicates the remaining volume in
the syringe or the Auto-Fill volume requested.
A three digit LED display indicates the syringe size of the
face plate.
800961-C
Nov. 2000
Advertisement
Table of Contents
