How long can the Tesys T remain unpowered and still retain accurate date and time information?
Issue: How long can the Tesys T remain unpowered and still retain accurate date and time information?
Product Line: Overload relays and Motor Management Systems
To ensure an accurate record of faults, be sure to maintain the LTM R controller’s internal clock. The LTM R controller time stamps all faults, using the value stored in the Date And Time Setting parameter. Internal clock accuracy is +/-1 second per hour. If power is continuously applied for 1 year, the internal clock accuracy is +/-30 minutes per year. If power is turned Off for 30 minutes or less, the LTM R controller retains its internal clock settings, with accuracy of +/- 2 minutes. If power is turned Off for more than 30 minutes, the LTM R controller resets its internal clock to the time when power was turned Off.