Priming Detector - Gambro AK 95 S Service Manual

Line clamps
The blood unit includes two line clamps: Arterial
line clamp and venous line clamp. The arterial
line clamp is located to the right and the venous
line clamp is located to the left when viewed
from the front. The clamp covers also have
different colour markings: The arterial clamp
cover is marked with a red dot and the venous
clamp cover is marked with a blue dot.
The line clamp unit consists of the following:
• Housing with covers (mounted on the front
plate).
• 2 solenoids (as one unit).
• Line clamp driver board.
• 2 clamp detectors.
The line clamp driver board interfaces to the
protective CPU board, via a board connector and
a flat cable.
Blood pump unit
The blood pump unit consists of the following:
• Tube pump (self-threading).
• 24 V bruchless DC motor with an encoder
for velocity monitoring.
• Gear box (1:50).
• Cover detector.
The blood pump unit, except the tube pump, is
mounted on the back of the front plate. The
motor, cover detector and position board inter-
face to the BM I/O board, via connectors and
cables.
Heparin pump
The heparin pump unit consists of the following
components:
• Syringe pump. The diameter of the syr-
inge can range between 10 to 30 mm
• Stepping motor.
• Gear box (1:120).
• Heparin pump position board.
• Heparin pump feedback potentiometer.
The stepping motor, heparin pump position
board and heparin pump potentiometer interface
to the BM I/O board, via cables.
AK 95 / AK 95 S Service Manual
HCEN 9134 Rev. 10.2005
Venous pressure transducer (C+P)
The blood unit is equipped with two pressure
transducers connected to one port, which are
used to measure the venous blood pressure. The
pressure transducers are mounted on a pressure
transducer board, which interfaces directly to
the BM I/O board, via a board connector. The
pressure transducers are connected to the
venous pressure transducer nipple (located on
the front), via a small tube.
Arterial pressure transducer
AK 95 S can be equipped with a second pressure
transducer, named Arterial Pressure Trans-
ducer. This pressure will be displayed on the
arterial bargraph. The transducer is used for
true arterial pressure measurement or any other
pressure. The pressure transducer is mounted
on a pressure transducer board, which interfaces
directly to the BM I/O board, via a board connec-
tor.
Air detector
The air detector consists of an ultrasonic trans-
mitter and receiver mounted in a head. The air
detector head is adjustable to accomodate most
drip chambers of 18-30 mm diameter. The air
detector interfaces to the BM I/O board and the
driver board via 2 cables.

Priming detector

The priming detector is intergrated in the Line
Clamp Unit. It has a detector board (on the back
of the front). The detector board contains a LED
and a phototransistor. The current through the
LED is indicating how much current that is
needed to get a certain light transmission
through the light guides to the receiver. The
lower the value is, the better.
Technical Description
2:21