![Datex-Ohmeda F-LM1 Technical Reference Manual Download Page 147](http://html.mh-extra.com/html/datex-ohmeda/f-lm1/f-lm1_technical-reference-manual_513835147.webp)
Functional description
Document No. 8000060-1
9
Signal processing
Two signals from the pressure transducers are amplified and sent to A/D converter. After the
converter, digitized signals are sent to microprocessor for data processing. Before the converter,
one of the signals is used to adjust the offset to the pressure safety level.
The NIBP module is controlled with 80C51FA microprocessor at 16 MHz oscillator frequency.
Memory
NIBP program memory (EPROM) size is 128k
×
8. RAM size is 32k
×
8 bit and it stores variable
values in NIBP measurement. EEPROM is size 64
×
16 bit and is used to store the calibration
values for the pressure transducers, the pulse valve constants gained during measurements, the
PC board identification, and module serial number.
Software control
Software controls valves and pump. In addition to the individual on/off signals for each
component, there is a common power switch for the valves and the pump that can be used at
pump/valve failures.
In addition to external reset line, the microprocessor system is equipped with its own power-up
reset.
Watchdog timer
The NIBP module is equipped with a software independent safety circuit to disconnect supply
voltages from the pump and the valves if the cuff has been pressurized longer than the preset time.
Pressure limit is specified to 5 mmHg. As soon as the cuff pressure rises over 5 mmHg, a timer
starts counting. The timer is adjusted to stop the pump and open the valves in 2 minutes 10
seconds in adult/child mode and in 1 minute 5 seconds in infant mode.
Summary of Contents for F-LM1
Page 4: ...Datex Ohmeda S 5 Light Monitor Document No M1037863 2 ...
Page 8: ...Datex Ohmeda S 5 Light Monitor Document No M1051339 iv ...
Page 68: ...Datex Ohmeda S 5 Light Monitor Document No M1051339 60 ...
Page 78: ......
Page 80: ...Datex Ohmeda S 5 Light Monitor Document No 8001934 2 ii ...
Page 88: ...Datex Ohmeda S 5 Light Monitor Document No 8001934 2 8 ...
Page 89: ...Appendix A Planned maintenance form APPENDIX A 9 Document No 8001934 2 ...
Page 90: ...Datex Ohmeda S 5 Light Monitor Document No 8001934 2 10 ...
Page 94: ......
Page 96: ...Datex Ohmeda S 5 Light Monitor Document No M1051339 ii ...
Page 112: ...Datex Ohmeda S 5 Light Monitor Document No M1051339 16 ...
Page 114: ......
Page 116: ...Datex Ohmeda S 5 Light Monitor Document No 8000060 1 ii ...
Page 128: ...Datex Ohmeda S 5 Light Monitor Document No 8000060 1 12 ...
Page 134: ...Datex Ohmeda S 5 Light Monitor Document No 8000060 1 18 ...
Page 136: ......
Page 140: ...Datex Ohmeda S 5 Light Monitor 2 Document No 8000060 1 ...
Page 200: ...Datex Ohmeda S 5 Light Monitor 62 Document No 8000060 1 ...
Page 201: ...APPENDIX A Check form 63 Document No 8000060 1 APPENDIX A ...
Page 202: ...Datex Ohmeda S 5 Light Monitor 64 Document No 8000060 1 ...
Page 206: ......
Page 208: ......
Page 210: ...Datex Ohmeda S 5 Light Monitor Document No 8000060 1 ii ...
Page 224: ......
Page 226: ...Datex Ohmeda S 5 Light Monitor Document No 8000060 1 ii ...
Page 232: ......
Page 234: ...Datex Ohmeda S 5 Light Monitor Document No 890201 5 ii ...
Page 244: ......
Page 246: ...Datex Ohmeda S 5 Light Monitor and Light Solo Document No M1051340 ii ...
Page 254: ...Datex Ohmeda S 5 Light Monitor and Light Solo Document No M1051340 8 ...
Page 256: ......
Page 258: ...Datex Ohmeda S 5 Light Monitor and Light Solo Document No 890200 5 ii ...
Page 274: ...Datex Ohmeda S 5 Light Monitor and Light Solo Document No 896192 1 ii ...
Page 283: ...External Battery Charger N LCHGR 7 2 Exploded view Document No 896192 1 9 ...
Page 284: ...Datex Ohmeda S 5 Light Monitor and Light Solo Document No 896192 1 10 ...
Page 286: ......
Page 288: ...Datex Ohmeda S 5 Light Monitor Document No 8000060 1 ii ...
Page 302: ...Datex Ohmeda Light Monitor Document No 8000060 1 14 ...
Page 304: ......
Page 306: ...Datex Ohmeda S 5 Light Monitor This page intentionally left blank Document No M1051358 ii ...
Page 316: ...Datex Ohmeda S 5 Light Monitor 65 66 64 Document No M1051358 10 ...
Page 325: ...Spare parts Document No M1051358 19 ...
Page 328: ...Datex Ohmeda S 5 Light Monitor This page intentionally left blank ...
Page 330: ......
Page 332: ...Datex Ohmeda S 5 Light Monitor Document No 896551 2 ii ...
Page 340: ...Datex Ohmeda S 5 Light Monitor Document No 896551 2 8 ...
Page 342: ......
Page 344: ...Datex Ohmeda S 5 Light Monitor Document No 896552 2 ii ...
Page 352: ......
Page 354: ...Datex Ohmeda S 5 Light Monitor Document No 896553 2 ii ...
Page 360: ......
Page 362: ...Datex Ohmeda S 5 Light Monitor Document No 896554 2 ii ...
Page 367: ...Method of Replacing the Lamp Unit LCD Backlight ...
Page 368: ......