Hoffrichter CARAT I, Руководство по обслуживанию

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5 assemblies
5.1 COnTROL CIRCuIT BOARD
The control circuit board facilitates the operation and control of the artificial respiratory machine.
The machine is divided into two main function groups, the operating section and the control sec-
tion.
5.1.1 OPERATIng SECTIOn
Functions:
1. Selection of the respiratory mode and display by the Light Emitting Diode (LED)
2. Input of the respiratory parameters using the Multi-Function Knob (MFK) and display in the Liq-
uid Crystal Display (LCD)
3. Start the respiratory mode
4. Saving the respiratory parameters set, and the applicable alarms
5. Display of alarms in the display and by the LED
6. Real-time clock
7. Communication through the external RS232 interface, remote alarm
8. Communication by the controller through the serial interface
to 1.)
The selection of the respiratory mode is made by pressing the esc | mode button. The actual respi-
ratory mode is displayed by the applicable continuous lights of the LED, the new selected mode
blinks until confirmation is made by pressing the MFK.
to 2.)
After selection of the respiratory mode, the applicable respiratory and alarm parameters are shown
on the display. The choice and setting of the parameters is made through the MFK (selection of
the parameters is by turning, acceptance by pressing the knob; Setting of the parameters by turn-
ing and acceptance by pressing the knob. Inputs made, but not yet confirmed, can be cancelled by
pressing the esc | mode button).
to 3.)
Respiration is started by actuation of the On/OFF button. To stop the respiration, the On/OFF but-
ton must be actuated once for a period of 3 s. It is shown, as additional information, as a message
on the display.
to 4.)
The parameter set, as well as the arising alarms set during the respiration, are saved in two serial
EEPROMs (size 2 x 128 kByte).
to 5.)
An actual active alarm is signaled by the alarm LED (red - top row left) as well as by an acoustic sig-
nal. The alarm signal can be muted for a maximum period of 2 minutes by actuation of the alarm
button. The optical alarm remains until the discontinuation of the cause of the alarm.
If an alarm occurs during respiration, and the cause of the alarm disappears before the alarm can
be switched to mute, the optical alarm display remains until actuation by pressing the control but-
ton.