20
recommended to carry out separate storage in an environment with a temperature between -20°C and +35°C. After storage, the battery
needs to be recharged.
12.2.3
Fuse replacement
Spencer 170 uses two fuses type
F1L250V (Fusibile Fast 5x20mm 1A).
The manufacturer assumes no liability related to the use of spare
parts not meeting the specifications provided.
The fuse is a protection mean for the device, which interrupts the flow of current to the ventilator if it exceeds the maximum value
acceptable the device.
If the fuse blows, the device will continue to work with the internal power supply (battery) until it is exhausted, but will not be possible to
recharge it or use it by connecting to an external power source.
If the interruption involves the internal battery, the device can be used only if connected to the external power source.
This condition will be identified by the informations described for the event “
Primary battery failure
”.
Both fuses are placed on the side panel of the device and can be replaced with a screw driver removing the fuse holder.
Verify that the filament is actually broken in order to ensure that the problem is not to be found in other components.
Insert the new fuse in the removable fuse holder and screw again.
Both fuses must be replaced every year.
12.2.4
Battery replacement
The annual maintenance of the device requires, among other activities provided by the manufacturer, the replacement of all batteries.
If is necessary to replace the batteries before the annual revision, follow these instructions:
Verify that the device is turned off and disconnected from the power supply.
Using a coin or a screwdriver, open the battery compartment.
Pull out the battery pack and disconnect the connector by lifting the locking tab.
Similarly, disconnect the 9V battery from its connector.
Connect the new batteries and place them inside the battery compartment and close the cover.
The backup battery is the type
6LF22
or
6LR61
9V
commercially available
.
Its proper connection is ensured by the connector allowin a
single way of insertion.
12.2.5
Alarms functionality test
Alarms must be subjected to regular checks to ensure that the device is suitable for use.
High pressure alarm Test 1:
Connect the device to the pneumatic supply.
Set the minute volume at the lower value
Set the pressure limit at 30 mbar
Set the frequency higher than 25 bpm
Turn on the device
Close with one hand the port used to connect the breathing tube making sure it is completely obstructed.
Gradually increase the volume minute until the alarm is activated. When the alarm starts the pointer of the manovacuometer should show
a pressure level of 25 mbar. If the alarm is regularly activated the test is successful.