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The signal is also used in homes and offices around the country. These include 999 communications, rail networks, cash machines and mobile phone networks.
ACCTIM RADIO CLOCK INSTRUCTIONS PROFESSIONAL
The time signal is accurate to within one thousandth of a second and supports a range of professional services. The signal, often referred to as ‘The time from Rugby’, will be known as ‘The Time from NPL’ from April 2007. The time signal used to set Britain’s radio controlled clocks with extreme accuracy is on the move from Rugby, where it has been transmitted since 1927, to a new home in Anthorn in Cumbria. The UK’s time signal is on the move after 80 years in Rugby.
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Will the switch from Rugby to Anthorn, Cumbria affect me? Domestic clocks/watches are generally refered to as either 'Radio Controlled' in the UK or 'Atomic' in America, they are both the same. The Caesium 133 Clock itself is housed under controlled conditions in a laboratory and a radio signal is transmitted which uses this clock as a referance. The term "Atomic" when applied to domestic clocks and watches purely refers to the source of the time signal. The transmitter signal is picked up by the watch or clock and sets the time and date automatically.ĭoes my watch contain any radioactive material? The atomic clock is the standard measure of time: the electron resonance frequency of the Caesium 133 atom is 9,192,631,770 cycles per second which is measured to give a time accurate to greater than +/- 1 second per million years.
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Radio controlled watches and clocks receive a time signal from a radio transmitter tuned to a caesium or 'Atomic Clock'.