Abstract: Printer tray orientation and print size selection includes receiving printable media in a tray of a printer. Tray guide positions of the tray are measured. An overall list overall list of all sizes of printable media capable of fitting in the tray is created by comparing dimension ranges of the tray guide positions to a predetermined media size dimension list for the tray in multiple orientations. A prioritized list of printable media sizes capable of fitting in the tray for given tray guide positions is created. A preferred printable media size is selected based on the prioritized list.

Abstract: Printer tray orientation and print size selection includes receiving printable media in a tray of a printer. Tray guide positions of the tray are measured. An overall list overall list of all sizes of printable media capable of fitting in the tray is created by comparing dimension ranges of the tray guide positions to a predetermined media size dimension list for the tray in multiple orientations. A prioritized list of printable media sizes capable of fitting in the tray for given tray guide positions is created. A preferred printable media size is selected based on the prioritized list.

Abstract: Self-contained smoke detector systems each have internal self-diagnostic capabilities and function as components of an automatic fire alarm communication system implemented with a conventional two-wire alarm initiating circuit. Each system includes a microprocessor-based self-diagnostic circuit that periodically checks sensitivity of radiation sensor electronics to smoke obscuration level. By setting tolerance limits on the amount of change in voltage measured in clean air, the system can provide an indication of when it has become either under-sensitive or over-sensitive to the ambient smoke obscuration level. An algorithm implemented in software stored in system memory determines whether and provides a sensitivity fault condition signal indicating that for a time (such as 27 hours) the clean air voltage has strayed outside established sensitivity tolerance limits.