UH1075_P139_Instructions_English.ppp 29/08/2016 16:01:45
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P139 GUARDIAN MONITOR INSTRUCTIONS
If, after 24 hours use, the monitor shows 2 bars, or more, the battery has some useful service life remaining. If the
monitor fails to operate for the full 24-hour period or the battery charge level has dropped to 1 bar the battery should be
replaced.
Periods of non-use
If the monitor is not going to be used for an extended period, ensure that the battery is fully charged before switching
off and storing the monitor. Power is disconnected by removing the mains plug. The monitor can be deactivated
temporarily in the professional pager to stop RF Fail alarms.
Battery Replacement
Battery Type: 7.5v 1500mAh NiMH Bespoke Battery Pack available from iTs Designs Ltd
Note: When the battery is removed and replaced the monitor settings will revert to the default settings that have been
pre-programmed. Thus ensure the defaults are safely saved (see HIDDEN menu) before removing the battery.
To replace or remove the battery, first switch off the monitor and disconnect the AC adaptor as well as any other
connecting leads. Remove the four base screws and open to expose the inner circuit board. Disconnect the battery
leads from the main board. Remove the main pcb after removing the 65 retaining screws. Cut the 2 tie clips holding the
battery and dispose of the old battery safely. Mount the new battery using 2 new tie clips and refit the circuit board with
the 6 retaining screws. Re-connect the 2 battery leads, The base of the monitor can now be refitted .