3 sentences

1. 匠人用矩来校准直角。

   jiàng​rén yòng jǔ lái jiào​zhǔn zhí​jiǎo.

   The craftsman used a square to calibrate the right angles.

   Source: Dong Chinese Dictionary

2. 我正在校准我们昂贵的指南针。

   wǒ zhèng​zài jiào​zhǔn wǒ​men áng​guì de zhǐ​nán​zhēn.

   I'm calibrating our expensive compass.

   Source: OpenSubtitles

3. 在实验开始前，我们需要先校准这些测量仪器。

   zài shí​yàn kāi​shǐ qián, wǒ​men xū​yào xiān jiào​zhǔn zhè​xiē cè​liáng yí​qì.

   Before the experiment begins, we need to calibrate these measuring instruments.

   Source: Dong Chinese Dictionary