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发表于 2016-7-10 14:48:49
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生产用计算器的检查
(出处: 蒲公英 - 制药技术的传播者 GMP理论的实践者)
计算器是药品生产中经常用于计算收率,称重,投料,含量等,如果某个键出现问题会酿成大错,最近一次检查中遇到了这个问题,检查官给了一个计算器的检查方法,和大家分享下。
1. Check each key is working properly (all numbers plus all calculation keys), by depressing the key 6 or 7 times, making sure they respond easily and are not stuck or sticky. 检查每个键都能正常工作 (所有数字键和运算键),每个键按6-7次,确认每个键都反应灵敏,不卡,不粘。
2. Enter 1 repeatedly, until the display is filled up., Repeat with 2, 3, 4, 5, 6, 7, 8, 9. To check zero, enter 1 (or any other number) then 0 repeatedly until the display is filled. All numbers should display completely with no errors or missing pixels. 按下“1”键,直至全屏,重复2-9键。检查“0”键,按下“1”键或其它任意键,然后按下“0”键直至满屏,每个数字都应完整显示,没有错误或缺少。
3. Enter 2 divide 3; should be 0.666666667 (depending on display) If the last displayed digit is 6 rather than 7, then your calculator approximates by truncating instead of rounding, so be prepared for slightly greater loss of accuracy in longer calculations. Now multiply the result by 3; should be 2, then subtract 2 from the result, should be zero.按下2除以3,结果应为0.666666667(取决于显示位数),如果最后一位是6而不是7,那么你的计算器是截取数字而不是四舍五入,因此要长计算时要准备好稍微损失些精度。将结果乘以3,结果应为2,任何减去2,结果应为0.
4. Enter 22 divide 7; should be 3.142857142857143 (depending on number of display units)。按下22除以7,结果应为3.142857142857143 (取决于显示位数)
5. Enter -22 divide 7, should be -3.142857142857143 (depending on number of display units)按下-22除以7,结果应为-3.142857142857143 (取决于显示位数)
6. 6 / 3 X 5 + 2.4 – 1 = 11.4
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