Power Failure - Hoffrichter point 2 User Manual

Automatic zero point correction of pressure sensor
Automatic zero point correction ensures the uniformly high precision of the pressure
measurements and takes account of aging effects. Therefore the electric and electro-
nic components are maintenance-free.
Sensors are normally temperature-compensated before being installed in CPAP devices.
This process requires certain compensation tools, which are used solely by trained staff.
Unfortunately, the selected values are not permanent as they vary over time due to
aging, vibrations or constant changes in climate. This means that these values need to
be checked for correctness at prolonged intervals and possibly readjusted.
HOFFRICHTER's technicians have however developed a new method in which the
necessary compensation tools are, so to speak, permanently „on board" the point 2.
It is thus no longer necessary to check measurement accuracy.
To allow this method to function, the point 2 has to be put on standby from time to
time. Here it is sufficient to run the device in this mode for just a few seconds before
and after each starting up of the blower to allow the software to collect and apply
the necessary data. We also recommend running the device on standby for a longer
period, e.g. for a day, once a month.
Please note: In order to determine an applicable correction factor, the device requires
a certain amount of time in standby mode. We therefore recommend that the device
is left in standby mode at least once a month between nightly therapies.
The zero-point correction is particularly recommended if the device is used in a new
location (e.g., when travelling) or if there are significant temperature fluctuations in
the room. For the patient the automatic zero-point correction system means that the
device is always optimally adjusted, leading to even better therapy.

Power failure

After a power failure during therapy, the motor re-starts automatically and you will see
a message on the display about the power failure and the blower re-start.
Please note: If you are using the optionally available powerpackpoint 2, the batteries
provide the power for the device in the event of a power failure.
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Commissioning 33