3
Overview
The DuraTime wireless clock system is specifically designed for applications where precision
and reliability are of great importance. In most cases, external time updates are not required. The
RC100 includes an oven controlled oscillator with an accuracy of one second in 20 years (2 Parts
per Billion). The RC100 is factory calibrated with the U.S. Atomic clock. It will maintain time
during shipping and power outages. If greater accuracy is required, then external time updates
are required. However, the master clock is more reliable when operating solely from the internal
high precision oscillator.
If external time updates are desired, the RC100 includes an Ethernet interface to obtain NTP time
updates. An optional wireless GPS receiver is also available.
All clocks in the system will not only display the same time, but the true legal time. Any
combination of clock shapes, style or size may be synchronized. DuraTime clocks are designed
for organizations that require reliable and accurate synchronized time.
The DuraTime multi-path wireless clock system is highly reliable. The system operates on the
license-free 2.4 GHz Industrial, Scientific and Medical band. Spread Spectrum radios are used
to enhance signal coverage, along with AES 128 bit encryption to enhance security and
reliability. Multi-path wireless communications are used to propagate the time signal
throughout any size facility. The failure of any single clock will not affect the remaining clocks
in the system. Supervision is available to automatically check the operation of all wireless
devices on the system.
The system can be configured to use multiple, simultaneous time sources. For example, NTP,
GPS and the internal high precision oscillator time sources can all be used at the same time. The
standard RC100 is accurate to about 1 second in 20 years without NTP or GPS time corrections.
An optional Rubidium atomic oscillator is available that eliminates the need for NTP or GPS
updates and maintains split accuracy for the life of the system. Multiple master clocks may be
used so that if one master clock is down or loses sync, the system automatically continues to
function normally from the secondary master clock. DuraTime digital clocks include an internal
battery that will maintain the time for up to 10 years. DuraTime battery powered clocks utilize a
redundant parallel battery configuration that allows the clock to function even if a battery fails.
No other system on the markets offers this level of reliability and ease of operation.
Each master clock may be configured for a variety of time zone and Daylight Saving Rules,
including UTC (Zulu) Time, Any World Time Zone, Half-hour time zones, Enable or Disable
Daylight Saving Time, and selectable 12 or 24 hour display formats with digital intensity control
on digital clocks.
