Operator's Manual

11.1 Tempus Pro battery
Tempus Pro User/Operator Manual - 41-2001EN-00 – Page 213
The battery life should be monitored periodically when the device is in storage and also before and after use.
Note
RDT recommends that the battery charge status should be checked at least every month
and recharged if necessary. If the device is being used regularly then the battery should be
checked, weekly or daily depending on the frequency of use. RDT also recommends that
the battery be completely discharged and recharged once a year.
Note
The User should remember that battery capacity of older batteries will not be the same as
new batteries.
By monitoring the remaining battery life, situations where the battery is too weak to power the Tempus Pro
for the duration of an incident can be avoided. If the battery strength indicator shows less than 25% power
remaining, you should change the battery if possible to ensure that there is adequate power for the next time
it is needed.
Using the battery down to the point where it is completely empty will not cause any hazards or damage to
the system.
The power of the battery can be extended by enabling a screen-saving feature on the Tempus. Enabling
this feature will make the display switch off if 5 minutes pass with no operator intervention or alarms
triggering. The Tempus will remain on and performing any monitoring function it has been set to do. If any
patient or technical alarms occur, the Tempus display will come back on and the alarm functions sound as
normal. While the display is off, if any operator controls are used then the display will come back in
immediately.
Using the power save feature will enable the battery life to be extended significantly.
To enable this feature, go to the Display Menu and then turn Power Save to on – see “9.2.7 Power save
feature”.
Checking the charge of the battery
The charge state of the battery can be obtained by pressing the button on the front .
The battery is provided with 4 charge state LEDs. Pressing the button will light one or more lights. Each
light corresponds to 25% of the charge state of the battery in the order (from highest to lowest):
 Four green LEDs – 76-100%
 Three green LEDs – 51-75%
 Two green LEDs – 26-50%
 One green LED – 1-25%
 One green flashing LED – less than 10%
 No LEDs – no power due to deep discharge
Battery status is always displayed in the status bar – see “5.1.3 Battery status indicator”.
CAUTION
When the battery is low it should be recharged soon after use. Starting a Tempus on an
empty battery or leaving batteries in a low or empty state for prolonged periods may put the
battery into a deep-discharged state. In this state the battery LEDs will not light and the
battery will require a prolonged period on charge in order to return it to normal operation.
CAUTION
If none of the LEDs light, then the battery may have been deep-discharged. It should be left
on-charge on an external charger for 24 hours to bring the battery out of this state.
These will light cumulatively when the battery button is pressed i.e. only the one green light will light if the
charge state is 1-25% after which the 2
nd
green light will light as well.