Manual MR3140-M - DResearch
Manual MR3140-M - DResearch
Manual MR3140-M - DResearch
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<strong>DResearch</strong> – User <strong>Manual</strong> TeleObserver <strong>MR3140</strong>-M 2011-02-03<br />
4 Relevant comments on the daily operation<br />
The following relates to the use of the system in everyday life. Please note, that failure to comply with<br />
the instructions can really shorten the life of the system and/or individual components. In the worst<br />
case it can lead to irreparable damage, which is not covered by the warranty or guarantee.<br />
4.1 Power supply and shutdown of the systems<br />
It is important to ensure that the system is connected to a continuous power supply with correct value.<br />
Voltage fluctuations have to be intercepted by appropriate measures (e.g. UPS). Switching on and off<br />
is only allowed through the ignition contact or the key switch. Via this ignition signal the system is<br />
controlled booted up and shut down and so it saves data integrity and the full operational readiness.<br />
The system must never switched off by hard shutdown. This shortens the lifetime of the disk and<br />
leads to damage. Furthermore it is possible that hard shutdown leads to inconsistent data,<br />
because the archive structures could get damaged.<br />
Especially in the case of retrofitting of railed vehicles there is often the problem that no ignition signal<br />
is available. An appropriate boot up and shutdown signal (i.e. ignition) signal has to be provided. The<br />
technical staff has to be informed that the system has to be shut down controlled through a main<br />
switch before they shut down the vehicle and all its systems. Only then the main switch can be<br />
operated.<br />
4.2 Hold-back time of the permanent recordings versus data privacy<br />
During the permanent recordings the system automatically draws up an internal new archive for each<br />
camera at every full hour. Determine in the configuration how long the recordings in the ring archives<br />
shall be hold back at least (factory-set not added). A value of 48-72 hours as hold-back time for the<br />
records in the ring archives is usual. Synchronous data privacy requires in the most European<br />
countries, that the permanent recordings must not hold-back for more than 48 hours. It is obvious that<br />
these requirements are in conflict with each other.<br />
The above made setting "Limit the size of permanent recordings to:" = 48 hours guarantees, that no<br />
video data are available which are older than 48 hours. The priority of data privacy is higher, which<br />
leads to automatic deletion of the oldest sequences from the 47 th hours. So there are no full 48 hours<br />
in the ring archives – but perhaps only 47,xx hours!<br />
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