Companies, schools and other institutions need to have all their clocks telling the same time. Accurate time keeping can be more than convenient.
A business would want each clock to give accurate time for meetings, computers, electronics and even to make sure all alarms are scheduled precisely.
In schools, accurate time is critical so that every class begins at exactly the same time. Accurate time is also important for scheduling and school bells. They need to be at the exact same time every day and cannot be left up to human error.
In hospitals, the right time on all clocks could be critical. Scheduling for surgery, medications and machinery all rely on an accurate time.
There has to be a better system in place than manually setting and checking the clocks each day. This is when master clock systems comes in. A master clock system maintains accuracy for all clocks in a facility. The system should be reliable, flexible and easy for staff to use. The control system is typically a microprocessor based clock that synchronizes secondary clocks, either digital or analog, and in some systems, both.
As you can imagine, a master clock system has to be extremely precise and reliable. Their accuracy is maintained through local network or Internet connections, with higher level systems using GPS that is accurate to within microseconds.
The circuits controlled by a master clock system can be used for more than clocks. They set as auxiliary circuits for tones, bells and other timed events. Programming the events is done through a keypad mounted on the controller or through a web browser interface. WiFi wireless systems are also available that are simple to install and connect to a LAN network.
The master clock system should have a power back-up, in some cases a lithium battery good for 10 years.