3458As漂移校准容差百分比高达242％

通常校准间隔为一年，但这不是一成不变的。
在决定间隔时，您应该考虑使用仪器超出公差的后果。



     以下为原文

  Normally the calibration interval is one year, this is however not written in stone. You should consider the consequences of using an instrument out of tolerance when deciding intervals.

如果DC 0没有漂移，则自动校准不会使躯干回到校准并且DC电压漂移最可能的原因是7伏参考板。
您可以通过检查校准前后校准变量2来检查它们是否引用漂移。
蓝色按钮2卡？
2进入。
每次运行10伏特校准时，计算7伏参考校准值的值。
如果你的实验室正在做cals，我会做一些月0和10伏的cals来获得一些数据来计算漂移率，并确保我保持在可接受的限度。
高漂移率将迫使较短的校准周期。
好的仪表应具有小于8 ppm /年的漂移率。
与仅在需要时运行仪表相比，将仪表保持在24/7应该可以降低漂移率。
希望有所帮助。编辑：John Phillips于2013年4月1日下午1:35



     以下为原文

  If DC 0 is not drifting, auto cal will not bring the interment back to cal and DC volts are drifting the most probable cause is the 7 volt reference board. 
you can check if they reference is drifting by checking cal variable 2 before and after a cal.
Blue button 2 cal? 2 enter.
Each time the 10 volt cal is run a value is computed for 7 volt reference cal value.
If your lab is doing the cals I would do a few one month 0 and 10 volt only cals to get some data to compute the drift rate and make sure I stayed withing acceptable limits.
A high drift rate will force a shorter cal period.
A good meter should have a drift rate less than 8 ppm/year.
Keeping the meter on 24/7 should reduce drift rate as compared to only running the meter when needed.  

Hope that helps.

Edited by: John Phillips on Apr 1, 2013 1:35 PM