AMR linearity Testing/ CAP

[ssnowy787]

Hello, I wanted to see what everyone’s process was like for their 6-month AMR testing for chemistry/ia. Since CAP requires linearity testing of low, mid, and high of the AmR, does anyone use vendor calibrators or purchasing linearity material (this costs thousands of dollars). For a lab that tests 100+ tests , this is extremely expensive and tedious to do every 6 months. Looking for any effective way to improve this process. Thanks. near to our linearity.
I am hoping to use Roche Calibrators. But there are only a handful that have a 
3-pt calibration. 
Do your customers have a similar process for their linearity testing? 
low, mid and high range that is near to our linearity.
I am hoping to use Roche Calibrators. But there are only a handful that have a 
3-pt calibration. 
Do your customers have a similar process for their linearity testing?