GE S5 Owners Manual

							S/5 Extension Module for FM, N-FC, N-FCREC, N-FREC
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Document no. M1187338-003
Introduction
This Technical Reference Manual Slot provides  information for the maintenance and service of 
the Datex-Ohmeda S/5 Extension Module for FM, N-FC, N-FCREC and N-FREC. The Extension 
Modules for FM are designed for use with the S/5 FM Monitor and FM Light. Later in this manual 
the module can be called w/o the system name Datex-Ohmeda S/5.
Please also refer to the Part I sections of the  manual for information regarding system specific 
information e.g. related documentation, conv entions used, symbols on equipment, safety 
precautions, system description, system installa tion, interfacing, functional check and planned 
maintenance. 
N-FREC and N-FCREC provide real time printing of waveform and numerical data, and trend 
data.
N-FCREC and N-FC provide CO
2 airway and respiratory measurements.
WARNING The Extension Modules for FM provide airway and respiratory / CO2 
measurements intended for patien ts weighing over 5kg (11lb).
NOTE: Printings on thermal paper may be destroy ed when exposed to light, heat, alcohol etc. 
Take a photocopy for archive.
Figure 1 F-FCREC side and front views
Parameters
Compatibility
NOTE: The Extension Module for FM, N-FC is desig ned for use with L-FICU03(A) or later software.
NOTE: The Extension Modules for FM, N-FCREC and N-FREC are designed for use with 
L-FICU04(A) or later software.
NOTE: The Extension Modules for FM are compatib le with S/5 FM and FM Light monitors only. 
Module CO
2Recorder
N-FC      X
N-FCREC      X       X
N-FREC       X 
						

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Document no. M1187338-003
1Specifications
1.1 General specifications
N-FCREC 
Module size, W × D  × H90  × 169 ×  191 mm, 3.54  × 6.65  × 7.51 in
Module weight 1.0 kg/2.2 lb.
Power consumption 2.7 W standby, 11.5 W printing
N-FREC
Module size, W × D  × H90  × 169 ×  191 mm, 3.54  × 6.65  × 7.51 in
Module weight 0.8 kg/1.7 lb.
Power consumption 1.2 W standby, 10 W printing
N-FC
Module size, W × D  × H46  × 169 ×  191 mm, 1.81  × 6.65  × 7.51 in
Module weight 0.5 kg/1.1 lb.
Power consumption 1.5 W typical
1.1.1 Environmental specifications
Operating temperature +10...+40 °C (+50 to 104  °F )
Storage temperature -20...+60 °C (-4 to +140 ° F)
Atmospheric pressure 670...1060 hPa 
(500...800 mmHg)
(670...1060 mbar)
Relative humidity 10...90% non-condensing
Protection against electrical shock Type BF
1.1.2 Functional alarms
Funtional alarms for 
− Blocked sample line
− D-Fend replacement
− D-Fend check
1.2 CO2 measurement
1.2.1 Typical performance
EtCO2End-tidal CO2 concentration
FiCO
2Inspired CO2 concentration
Measurement range 0 to 20 vol% (0 to 20 kPa, 0 to 150 mmHg)
Accuracy  CO
2 concentration 0 to 15 vol% ±(0.2 vol% +2% of reading)
CO
2 concentration  15 to 20 vol%  ±(0.7 vol% +2% of reading)
Measurement rise time < 300 ms with nominal flow
Adjustable low and high limits for EtCO
2 and FiCO2. 
						

							S/5 Extension Module for FM, N-FC, N-FCREC, N-FREC
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Document no. M1187338-003
1.2.2 Technical specifications
Airway humidity 0...100%, condensing
Sampling rate 150 ±25ml/min (sampling line 2 to 3 m, normal conditions)
Sampling delay 2.1 seconds typical with a 3-m sampling line
Total system response time 2.4 seconds typical with a 3-m sampling line, including sampling 
delay and rise time (typically  3.7 seconds with a 6-m sampling 
line).
Automatic compensation fo r barometric pressure, CO
2-NO2 and CO2-O2 collision broadening effect 
compensation selectable from menu.
Warm-up time 1 min for operation with CO
2, 30 min for full specification
Autozeroing interval 4, 15, 30 and 60 minutes after start-up, then every 60 minutes.
1.2.3 Normal conditions
Accuracy specifications apply in normal cond itions (after 30 minutes warm-up period):
Ambient temperature 18...28 °C, within  ±5°C of calibration
Ambient pressure 500...800mmHg, ±50mmHg of cal.
Ambient humidity  20...80% RH, ±20% RH of cal.
Automatic compensation for barometric pressure.
Non-disturbing gases are those with a maximum effect on the CO2 reading 
						

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Document no. M1187338-003
1.2.4 Conditions exceeding normal
Accuracy specifications under the following conditions nop:
n  Ambient temperature 10...40  °C, within  ±5  °C of calibration
Ambient pressure 500...800 mmHg,  ±50 mmHg of calibration
Ambient humidity 10...98% RH,  ±20% RH of calibration
o  During warm-up 1 to 10 minutes, under normal conditions
p  During warm-up 10 to 30 minutes, under normal conditions
1.3 Respiration Rate (RR)
Measurement range  4 to 80 breaths /min
Breath detection 1% change in CO
2 level
Accuracy ±1/min in the range 4 to 20 l/min
±5% in the range 20 to 80 l/min
Resolution 1/min
Adjustable low and high limits for respiration rate; alarm for apnea.
1.4 Recorder
1.4.1 Typical performance
Principle Thermal array
Print resolution Vertical 8 dots/mm (200 dots/inch)
Horizontal 32 dots/mm (800 dots/inch) at a speed of 25 mm/s and slower
Paper width 50 mm, printing width 48 mm
Print speed 1, 6.25, 12.5, 25 mm/s
Waveform printout selectable 1, 2, or 3 waveforms
Numerical printout HR, NIPBP, P1, P2, T1, T2, Tblood, Et/FiCO
2, RR
Tabular Trend printout HR, SpO
2, P1, NIBP, EtCO2
  Accuracy under different conditions (see above)
Conditions 
n and  p Condition o
CO
2 (0 … 15 vol%) ±(0.3 vol% + 4% of reading)
(at 5 vol% error ±0.5 vol%)±
(0.4 vol% + 7% of reading)
(at 5 vol% error  ±0.75 vol%)
CO
2 (15 … 20 vol%) ±(0.8 vol% + 4% of reading)
(at 5 vol% error ±0.5 vol%)±
(0.9 vol% + 7% of reading)
(at 5 vol% error  ±0.75 vol%) 
						

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Document no. M1187338-003
2 Functional description
2.1 Measurement principle 
2.1.1 CO2 measurement
MiniC is a side stream gas analyzer, measuring real time concentrations of CO2. It is a non 
dispersive infrared analyzer, measuring absorption of the gas sample using an optical narrow 
band filter.
The infrared radiation detector is thermopile.
Concentration of CO
2 is calculated from absorption measured at 4.2 to 4.3  µm.
Figure 2 Absorbance of CO2
2.2 Main components
The miniC unit in N-FC and N-FCREC modules consists of:
− Gas sampling system
− MiniC measuring unit
− CPU board
The recorder unit in N-FREC and N-FCREC consists of:
− Recorder board
− Thermal printer 
						

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Document no. M1187338-003
2.2.1 Gas sampling system
The sampling system draws a gas sample to the analyzer at a fixed rate.
The gas sampling system samples the measured air to the module, and removes water and 
impurities from it. A sampling line is connected to the water trap. The pump draws gas through 
the sampling line to the gas measuring unit. After the measurement, the gas is exhausted from 
the sample gas out connector.
The sample flow is  nominally 150 ml/min.
Figure 3 MiniC block diagram
Mini D-fendTM
The sample is drawn through the sampling line. The gas then enters the module through the 
water trap, where it is divided into two flows,  a main flow and a side flow. The main flow goes 
into the analyzer. This flow is separated from the patient side by a hydrophobic filter. The side 
flow creates a slight subatmospheric pressure wi thin the Mini D-fend water trap which causes 
fluid removed by the hydrophobic filter to collect in the bottle.
Zero valve 
The main flow passes through a magnetic valve before proceeding to the analyzer. This valve is 
activated to establish the zero point for the MiniC measuring unit. When the valve is activated, 
room air is drawn through a filter into the internal system and the gas sensor. 
						

							S/5 Extension Module for FM, N-FC, N-FCREC, N-FREC
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Document no. M1187338-003
NafionTM tube 1) 
A Nafion tube is used between the water trap and the zero valve to balance the sample gas 
humidity with that of ambient air. The tube prev ents errors caused by the effect of water vapor 
on gas partial pressure when humid gases are measured after calibration with dry gases.
Gas analyzers
After the zero valve and Nafion tube, the gas passes through the miniC measuring unit.
Sample flow differential pressure transducer
The sample flow differential pressure transducer measures pressure drop across a restrictor 
and calculates the sample flow from the pressure difference.
Working pressure transducer
The working pressure transducer measures differential pressure between the tubing and 
ambient air near the miniC measuring unit. 
Atmospheric pressure transducer
The atmospheric pressure transducer  measures real-time atmospheric pressure. The following 
messages are based on the obtained pressure values: ‘sample line blocked’, ‘check D-fend’, 
‘replace D-fend’ and ‘check sample gas outlet’.
Sampling pump and damping chamber
The gas sampling pump is a membrane pump run by a DC-motor. Sample flow is measured 
with a differential pressure transducer across  a known restriction. The motor is automatically 
controlled to maintain a constant flow even when the D-fend water trap ages and starts to get 
occluded. It also enables the use of sample tubes with varying lengths and diameters. 
NOTE: In no occasion is the flow reversed towards the patient.
11) Nafion is a trademark of Perma Pure Inc. 
						

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Document no. M1187338-003
Figure 4 Gas tubing layout 
2.2.2 MiniC measuring unit
The miniC measuring unit is a non-dispersive infrared analyzer measuring absorption of the 
gas sample at 4.2 to 4.3 µm infrared wavelength, which is  selected using an optical narrow 
band filter. The IR lamp is a filament surrounded by thermal isolation. There is a hole in the 
isolation, passing the radiation to a conical  measuring chamber with 3 mm length. From the 
sample chamber, the radiation goes into a thermopile detector with an optical filter in front of 
it.
The temperature sensor measures the miniC
 measuring units temperature and it is used for 
temperature compensation.
The miniC measuring unit includes a miniC flexib le board, which connects the thermopile signal 
and the temperature sensor signal to the CPU board.
                               
Figure 5 MiniC measuring unit
Gas out
Side flow
Main flow Sample line
Room air
Zero
valveMi ni
D-fend
Mi ni C
Diff.
Pressure Sensor
Di ff .
Pressure
Sensor
Pump
Filter
Abs.
Pressure Sensor
minic_fem_gastubing.vsd 
						

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Document no. M1187338-003
2.2.3 CPU board
The CPU board contains a processor, memories and all the analog signal processing needed. A 
MiniC measuring unit is attached to the board with a flexible PCB. Also supply voltage and an 
RS485 serial channel are connected to the CPU board using another flexible PCB.
Analog signals (CO
2, temperature, absolute and differential  pressures and lamp current signals) 
are fed to the 16-bit A/D converter. The proces sor controls the A/D converter and calculates 
the CO
2 percentage and respiration rate from this data.
The processor controls sample flow by adjusti ng the pump voltage based on the differential 
pressure signal. The processor also controls the current of the IR source and keeps it constant.
Calibration data is stored on the EEPROM.
2.2.4 Recorder board
The function of the recorder board is to estab lish an interface between the recorder unit and 
main CPU board in the monitor. The recorder un it related side panel key is connected to the 
recorder unit via the recorder board. The reco rder unit and the recorder board are connected 
together with a special connector. The REC boar d controls the recorder unit communication 
and power.
The REC board is grounded via the recorder unit.  If the recorder unit is not installed, the REC 
board does not function.
Figure 6 Recorder board block diagram
External Communication
Communication with the main CPU board is established via RS485.
Supply voltage The recorder unit supply voltage, +15V_REC, is provided by the recorder board.
 
n-frec_block_brd_diag.vsd
Pow er
Suppl
y
+15
V
CPU
RS48
5
Driv
er
Dat
a
MODULE BUS
NV
Memo
ry
Record
er
Uni
t
REC Board
REC
Ke
y
Reset
Communicati on
CT
S +15V_RE
C
PowerSupply
+15 V
CPU
RS485
Driver
Data
MODULE BUS
NV
Memory
Recorder Unit
REC Board
REC
Key
Reset
Communication
CTS +15V_REC 
						

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Document no. M1187338-003
Module Bus Flex boardModule Bus Flex board connects the CPU board  of the miniC unit and the recorder board to 
the module bus.
Figure 7 Module bus flex board
2.3 Connectors and signals
2.3.1 Module bus connector 
      
5 pin female connector Pin No. Signal
1GND
2Vmod 13.8 - 16 V
3Data +
4Data -
5Shield