Japanese to English Tech/Engineering Computers: Software Software

From a software manual:
"計測信号および計算信号に対する上上限／上限／下限／下下限の監視条件の設定および監視項目に対する下限マスク条件の設定ができます。"

Here's my first stab at it:
"Lower level masks, as well as the upper-upper, upper, lower, and lower-lower observation limits can be set for measurement and computational signals."

Are there more appropriate translations for:
* 上上限／上限／下限／下下限
* 監視条件

thanks!