| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an instrumentation system which can prevent the life of batteries incorporated in each of redundant measuring devices from becoming exhausted simultaneously. <P>SOLUTION: A tank 1 is provided with duplexed first and second measuring devices 2 and 3. The first measuring device 2 has a first radio transmission unit 4 and a first battery 7 and the second measuring device 3 has a second radio transmission unit 5 and a second battery 8. A battery life of the first battery 7 and the second battery 8 in design are 13 months and 17 months respectively, which constitutes a relation that they are a prime number to each other. <P>COPYRIGHT: (C)2012,JPO&INPIT |
