Siemens SC 7000 Service Manual page 37

SC 7000 and SC 9000XL Patient Monitors
Temp
MultiMed
ECG
Defib
Protection
Resp
ESU
SpO
2
Figure 2-8 MultiMed Front End
8.3 Functional Description
8.3.1 ECG/Resp
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7k9kXLTM.c2.CD_ROM.fm/04-99/kaupp
NBP Pressure
Hose Transducer
Linearizer
RF Filter
Lead Off
Pre-
Amp
Neutral
SW
Modulator
Lead
Select
Demodulator
Modulator
LED Drive
Ambient
Differential
Light
I/V
Converter Rejection
• Specially shielded connectors and cables are used to provide
excellent immunity up to 1000MHz and can not be touched by patient
even when disconnected.
• Single cable from MultiMed Pod to main SC7000 or SC 9000XL unit
reduces clutter between bed and monitor.
Transducers gather physiological data at the patient and feed them into the
small MultiMed Pod at the bed. The MultiMed Pod in turn is connected via
a 3-meter cable to the MultiMed front end in the main unit where analog
ECG, Respiration, Temperature, and SpO
form and sent through isolators for processing.
The MultiMed Pod located close to the patient accepts a set of 3, 5 or 6
shielded ECG electrode leads, an SpO
temperature sensor. The ECG section contains RF filters, and overvoltage
clamps that include 1k series resistors to limit shunting of defibrillator
current. The SpO
Siemens Medical Systems, EM-PCS Danvers
NOT A CONTROLLED DOCUMENT
NBP
Low-Pass
Amp
Filter
Power Monitor
Temp
Amp
Temp Ref.
ECG
Bandpass
Amp
Filter
Pace
Amp
Current
Sources
Resp
Bandpass
Amp
Filter
Cal Resistor
Red
Demodulator
I/R
2
(Nellcor) cable adapter, and a
2
and temperature sections also contain RF filters.
2
Service Manual
4
2
2
6
4
2
M 16 Bit
U A / D
X Converter
2
Asic
Control
Data Control
Power
Pod Com
signals are converted to digital
21