| 摘要 |
PURPOSE:To prevent a change in correcting value with time for zero-point adjustment stored in a memory by using the correcting value and a coefficient for gain adjustment for correcting an A/D conversion result. CONSTITUTION:The correcting value which is added to an A/D conversion value when none of sensors 11-1n is in operation to obtain zero as the sum is stored in the memory 10, and the correction coefficient by which an A/D conversion value when specific-value signals are outputted to the sensors 11-1n is multiplied to obtain a specific value is stored in the memory 10. When a CPU5 fetches data from an A/D converter 4, the correcting value for zero adjustment and coefficient for gain adjustment which are stored in the memory 10 are read out for arithmetic, and the result is stored in the memory 10. Therefore, the possibility of a change in correcting value with time is eliminated unlike a method wherein amplifiers 2i-2n are adjusted. |
