KEITHLEY DAS-16 14048 Digital source meter

KEITHLEY DAS-16 14048 Digital source meter

f one source should fail, the DS1210S switches to the redundant source. Each time the board is powered, the DS1210S checks power sources and if the voltage of the backup sources is less than two volts, the second memory cycle is blocked. This allows software to provide an early warning to avoid data loss. Because the DS1210S may block the second access, the software should do at least two accesses before relying on the data. The MVME162 provides jumpers (on J20) that allow either power source of the DS1210S to be connected to the VMEbus +5 V STDBY pin or to one cell of the onboard battery. For example, the primary system backup source may be a battery connected to the VMEbus +5 V STDBY pin and the secondary source may be the onboard battery. If the system source should fail or the board is removed from the chassis, the onboard battery takes over. Refer to Chapter 2 for the jumper configurations

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