Theory of Operation
30
40-5648-51B
AC power input & power supply board
This
AC Power Input
provides a receptacle for con
-
necting an IEC 320-type AC power cord to the inter
-
nal, universal input power supply. This
Power Supply
Board
provides 12 VDC to operate the pump and
charge the batteries.
DC power input jack
The
DC Power Input Jack
connects external DC power
into the pump from external DC sources. This input is
protected from over-voltage and reverse polarity.
•
Always observe all
cautions and warnings
for con
-
necting DC power to this input.
Speaker
The primary
speaker
serves as the primary audio
source for generating alarms.
•
The microprocessor senses speaker current to
determine if speaker is operational.
Rechargeable battery pack & battery
gauge
A
rechargeable NiMH battery pack
(NiCad battery
pack on older model pumps) allows operation on bat-
tery, which also serves to provide backup power with
the loss of externally applied AC or DC power
A gauge residing on the battery pack maintains pres-
ent battery capacity during charge and discharge
conditions. The gauge monitors battery temperature
and controls the battery charger in setting the charge
rate. The pack contains a resettable fuse which limits
the current flowing through the battery.
Plunger printed circuit board
This
plunger printed circuit board (PCB)
provides
connection and pre-amplification of sensors in the
plunger driver to the main microprocessor board. The
plunger PCB contains the force sensor amplifier and
the plunger loaded sensors.
Plunger force sensor
The
plunger force
sensor
is a full bridge strain gauge
which generates a voltage proportional to the force ap
-
plied by the plunger driver to push the syringe plung
-
er. The allows the microprocessor to measure:
•
Voltage proportional to force applied to the sy
-
ringe plunger (i.e. occlusion detection).
•
Uses self test control line to verify force sensor and
circuitry are operating properly.
Plunger Loaded Sensors
The two
plunger loaded
sensors
are located on the
plunger PCB, and sense the state of each “flipper” on
the plunger driver.
•
Reports a logic state to the microprocessor to indi-
cate proper syringe plunger loading.
•
Uses self test signal to verify the sensor is not in an
electrically “stuck” state.
Содержание Medfusion 3000 Series
Страница 1: ...s Medfusion 3000 Series Technical Service Manual ...
Страница 2: ...Table of Contents ii 40 5648 51B ...
Страница 20: ...Introduction 14 40 5648 51B ...
Страница 32: ...Scheduled Maintenance 26 40 5648 51B ...
Страница 80: ...Troubleshooting 74 40 5648 51B ...
Страница 116: ...Calibration Adjustment 110 40 5648 51B ...
Страница 158: ...Assembly Drawings Parts Lists 152 40 5648 51B Medfusion 3000 series main pump assembly See Note 1 ...
Страница 160: ...Assembly Drawings Parts Lists 154 40 5648 51B Case bottom assembly Medfusion 3500BC ...
Страница 162: ...Assembly Drawings Parts Lists 156 40 5648 51B Case top assembly w plunger ...
Страница 164: ...Assembly Drawings Parts Lists 158 40 5648 51B Case top assembly without plunger ...
Страница 167: ...Assembly Drawings Parts Lists 161 40 5648 51B Barrel clamp assembly GREASE SILICONE III SOLDER NO CLEAN ...
Страница 172: ...Assembly Drawings Parts Lists 166 40 5648 51B Accessories parts list Poleclamp assembly ...
Страница 182: ...Index 176 40 5648 51B ...
Страница 183: ......