| 摘要 |
PURPOSE:To eliminate an error of measurement due to a difference in position and to simplify structure by providing a moisture sensor to the internal wall part of a quantitative container coupled with a balancing device. CONSTITUTION:Sample grains, dropping into grain carrying bucket 6 from grain tank 34 via grain passage 36, are supplied to quantitative container 8 via vibrator 5. When a layer of grains with a repose angle is formed at the upper part of cylinder 17A, a timer stops vibrator 5 to stop the supply of grains to quantitative container 8. Weight detector 27 of balancing device 7 measures the weight of grains in quantitative container 8 and its signal is inputted to control circuit A. On the other hand, moisture sensor 18 composed of C-V converter B inputs its signal to correcting circuit 28 to correct a measured moisture value and the corrected value is displayed on display device 30 via amplifier 28. Next, the timer operates opening-closing device 20 to open on-off valve 19, thereby discharging the grains. Consequently, erroneous measurement due to a difference in position is eliminated and the structure is simplified. |
