11
Power Down Guide
The system can be left running 24/7.
If the user requires the system to be powered down, either due to an alarm condition or power
saving over a long weekend when O2 monitoring is not required, then a shutdown procedure
must be followed to avoid flattening the internal batteries.
The correct procedure is:
1. Turn off the Envitec unit first using the on/off button* (See Fig 3).
*Turning off the Envitec unit involves holding the on/off button whilst the display shows a
countdown of 3, 2, 1 then release button promptly.
2. Then unplug from the mains and press the battery on/off button again* (this will silence the
alarm).
Important note:
Failure to turn off the Envitec unit whilst the SafeAir unit is unplugged will cause the Envitec
internal battery to go flat. This may cause the display to lock up with an invalid O2 level
displayed.
If the unit has been powered down incorrectly (not following the steps above), and the batteries
have been allowed to go flat, then to recover the situation there is a reset switch (red button) on
the rear of the unit (See Fig 4).
With the unit still unplugged press the reset switch for 5 seconds, release and then follow the
‘
Power up guide
’.
The reset switch disconnects the Envitec battery momentarily
.
Fig 4
Fig 3
