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...

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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...

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...

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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...

S/5 Extension Module for FM, N-FC, N-FCREC, N-FREC
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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...

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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...

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...

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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...

S/5 Extension Module for FM, N-FC, N-FCREC, N-FREC
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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...

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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