Smiths Medical Pneupac babyPAC 100, User Manual

Page: 18 / 64

504-2056A 18
12. Low Battery Alarm
A yellow visual indicator is used to indicate that the internal battery used to power the alarm
unit is giving reduced voltage. With the 123A battery it will flash once every 30 seconds for
several hours of use as an early warning that the battery will need to be replaced. With both
of the recommended batteries the flashing rate will increase to twice every second,
accompanied by a medium priority audible alarm, for the final few minutes of the battery
life. When operating at very low temperature the life of the battery will be reduced.
Providing one of the visual indicators on the monitoring pod is flashing the absence of any
signal from the low battery indicator confirms that the battery voltage is adequate to operate
the alarm system correctly. Refer to Section 6(c) for recommendations concerning battery
replacement.
13. Battery
The electronic alarm unit is powered by means of a single cell lithium battery retained in a
battery holder on the right hand side of the ventilator. There are two, alternative-sized
batteries which can be fitted. For normal use the readily available size 123A 3V lithium
battery, as widely used in cameras, can be fitted. However, in MR environments it is
essential that the special low ferrous content battery, supplied by Pneupac
®
and marked
“For use in MR Compatible ventilators”, is used. This battery is in a size AA packaging but
provides 3.6V and has a non-metallic casing. It has been specially selected as having
minimal ferrous content such that when installed in the ventilator it produces no noticeable
effect. Only this battery should be used when the babyPAC 100 is used as an MR
Compatible ventilator.
It must be noted that no battery of this type, commercially available, is completely free of
ferrous content and so it must never be removed from the battery compartment of the
ventilator in the presence of a magnetic field.
The battery is retained by means of a reversible retaining cap which is removed by a quarter
turn anti-clockwise twist using a coin in the slots provided. During insertion of a new
battery the cap should be orientated according to the battery type being used. With the MRI
battery inserted, the cap should be fitted with the yellow "MRI" visible after assembly
whereas with the standard size 123A battery the "MRI" with a red cross through it should be
visible.
Lithium batteries have an expected shelf life of 10 years and there is no current drain on an
installed battery when the babyPAC ventilator is switched off. Under general use conditions
the specified batteries will give at least one year's service before requiring replacement.
PRECAUTION: If the ventilator is unlikely to be used for a long time or is placed in storage, ensure
that the function selector switch is left in the '0' (ventilator off) position. It is preferable also to
remove the battery from its holder.
WARNING:
BATTERY FOR MRI USE:
In order to avoid any risk of damage or injury-
i) Use only battery supplied by Pneupac
®
and marked “For use in MR
compatible ventilators”.
ii) Remove ventilator from MR environment before attempting to change battery.
iii) Do not take a loose battery into an MR environment.
* See Section 8(e) & (f) for explanation of symbols and description of alarm priorities.