Datex-Ohmeda S/5 M-NE12STPR, Техническое описание слота

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Datex-Ohmeda S/5 monitors
Document No. 800 1008-2
12
In M-NETPR module , there are two small boards, the 2P input board and the ECG input board,
attached to the front panel of the module. The front panel has six connectors and four keys. The
connectors are two for temperature measurement, two for invasive blood pressure measurement,
one for ECG, and one for NIBP. The keys are for Auto On/Off, Start/Cancel, P1 zero, and P2 zero.
The structure of M-NE12TPR is similar except the ECG board and ECG input board are different.
In M-NESTR module , there are two small boards, the ECG input board and the S input board,
attached to the front panel of the module. The front panel has five connectors and two keys. The
connectors are two for temperature measurement, and one for SpO
2
measurement, one for ECG,
and one for NIBP. The keys are for Auto On/Off, Start/Cancel. The structure of M-NE12STR is
similar except the ECG board and ECG input board are different.
2.2.3 NIBP board
ADDRESS
DECODER
POWER -UP
RESET
CPU
80C51FA
RS485
INTERF.
ADDRESS
LATCH RAM
INTERNAL
WATCHDO G
EEPROM
(Calib-
ration
Data)
AD -C O N -
VER T ER
Write protect switch
EPROM
FRONT
PANEL
KEYS SOFT-
WARE
CONTROL
DATABUS
ADDRESS BUS
WATCHDO G
TIMER
X1
JOINING
CHAMBER
CUFF
M
EXHAUST VALVE 1
BLEED VALVE
CHECK VALVE
PUMP
EXHAUST
VALVE 2
PRESS URE
TRAN
S -
D
UCERS
PUM P and
VALVE
DR IVER
OVE RPR ESSURE CO NTRO L
ZERO
VALVE
B1 B2
+ 15 VD
to
/fr
o
m
m
o
d
u
le
b
u
s
Figure 5 NIBP board functional block diagram
Pressure transducers
The NIBP board contains two pressure transducers. They are of piezoresistive type. One is used for
measuring the pressure of the blood pressure cuff and the pressure fluctuations caused by arterial
wall movement (B1). The other is used for detection of cuff hose type, cuff loose and cuff occlusion
situations etc. (B2). The transducers are internally temperature compensated. They are supplied by
a constant voltage and their output voltage changes up to 40 mV max. (50 kPa, 375 mmHg).