S/5 Anesthesia Monitor and S/5 Critical Care Monitor
Document No. 8002948
22
5.6
Set/Test
The power supply unit contains a watchdog circuitry,
which needs refreshment at every 1.5 seconds. If the
refreshment did not occur, the watchdog circuitry will
reset the main CPU. In normal operation the main CPU
refreshes the watchdog circuitry at every 0.2 seconds.
The purpose of the watchdog circuitry is to restart the
monitor if there was a serious malfunction. This feature is
useful in two cases: when the main CPU is not able to
control the monitor, or when the CPU controls the monitor
but detects a serious malfunction. Watchdog tests check
proper functionality of the watchdog circuitry in various
conditions.
Watchdog
test ensures directly that the watchdog of the
power unit functions properly. Choosing this test prevents
the watchdog circuitry from refreshing and shows running
seconds with an accuracy of 0.1 seconds.
The test should have the following result when the
watchdog circuitry is working properly: The monitor will
restart after 1.5 seconds from the start of the test. In
malfunction: ‘>20 s’ is displayed, and the test will
interrupt. In this case, the fault is in the watchdog circuitry
of the power unit.
WD by Overload
test ensures the functionality of a
feature, where the software controls the monitor, but
detects an overload situation in the main CPU.
The test should have the following result when the feature
is working properly: The monitor will restart after 15
seconds from the start of the test.
WD by UPI
test ensures the functionality of a feature,
where the software controls the monitor, but detects a
malfunction in the UPI processor and restarts the
UPI4(NET) board. The test will prevent the UPI processor
from functioning during the test.
The test should have the following result when the feature
is working properly: The monitor will restart the UPI4(NET)
board without any visual effects.
WD by GSP
ensures the functionality of a feature, where
the software controls the monitor, but detects a
malfunction in GSP processor (located on the primary
display controller board) and performs a restart. The test
will prevent GSP processor from functioning during the
test.
Immediately after the test starts, the screen update
stops. The test should have the following result when the
feature is working properly: The monitor will restart after 5
seconds from the start of the test.
Factory Reset
restore factory default settings and clear
data memories. Factory reset should be run if monitor
software is replaced or if the SRAM/Timekeeper battery is
replaced.
