When the dispatched dräger service engineer checked the device on-site, the entries in the log file for the period in question were unfortunately overwritten due to the fact that the hospital's biomed had done a lot of testing with the workstation in follow-up of the event and, this has created new log entries.Based on the reported power fail alarm the power supply unit was replaced in abundance of caution despite no power fail could be duplicated during on-site evaluation of the device.The replaced power supply was subject to an in-depth testing in the manufacturer's lab but did not exhibit any non-conformities during these tests.Reflecting the absence of persisting technical error condition, a reasonable explanation would be that the device ran on internal batteries during the time of event until these were depleted.Due to missing detailed description of event and erased log file records this can't be verified.The device is back in use without further problems reported to date.
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