Datex-Ohmeda S/5 Anesthesia and Critical Care Monitors
24
Document no
.
M1125636-05
33. Watchdog circuitry
Test the Central Unit watchdog circuitry:
Monitor Setup - Install/Service
(password 16-4-34)
- Service
(password 26-23-8)
-
Set/Test
Go through the
Watchdog
,
WD by Overload
and
WD by UPI
tests one by one and check
that the monitor performs a restart in all other cases except when performing
WD by UPI
.
NOTE: When selecting WD BY OVERLOAD, restarting should take place approximately
after 15 seconds. With the other tests, restarting takes place within a couple of seconds.
If restarting did not take place, try to locate the fault:
Watchdog --> CPU board /Power supply unit
WD by Overload --> CPU board
"
34. Trend retaining
Check that the monitor is capable of storing the trend information and temporary
settings in a short (max. 15 minutes) standby.
Turn the monitor to standby and disconnect the power cord. Wait for two minutes, then
reconnect the power cord and turn the monitor back on. The monitor should perform a
“Warm start” which means the trend information and temporary settings should still be
available.
If the monitor performed a “Cold start” instead, the battery needs to be replaced.
The information regarding the start-up is saved also in the Service log.
"
35. Service reset button
Check the service reset button. Turn the monitor to standby and press the service reset
button for at least five seconds. Turn the monitor back on and check that the monitor
performs a “Cold start”.
"
36. Recovering from power loss
Disconnect the power cord (during operation) for a moment, reconnect it and check that
the monitor recovers without problems. The monitor should perform a “Warm start”.
NOTE: F-CU5(P) may give an audible alarm during the power loss. The alarm is set by the
DIP switch on the F-CPU DC Power Board.
"
37. Electrical safety check
Perform an electrical safety check and a leakage current test.
"
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