American Time AllSync Plus - Manual (Page 16)

© American Time
16
AllSync Plus Clock Installation
& Operation Manual
Glossary
Appendix B LED
Illumination
Appendix A
Specifications
Tr
oubleshooting
General Operation
Installation
Intr
oduction
General Operation
AllSync Plus accuracy
The AllSync Plus movement continually makes adjustments to its own internal clock. With each correction
received from your master clock it will make an adjustment to match the time on the master. For this reason,
the longer the AllSync clock is connected to your master the closer it will get to your master’s time. After
approximately 2 days the AllSync Plus clock should be ±1 second to the master system clock.
Movement corrections
The AllSync Plus clock has two primary yet completely separate parts: the circuit board and the movement. The
circuit board listens to your master and tells your movement, when asked, the time in its own language. The
movement will ask for the time 4 times a day at 2am, 8am 2pm and 8pm. For this reason if your master time
is changed, the AllSync Plus clock will not correct until it has both received a correction from the master and
reached one of its four daily correction times.
Note: The AllSync Plus clock(s) starts its internal clock at 12:50 when power has been removed from it by more
than about 25 minutes.