Using Per Diem as a self-employed under my S-corp as a healthcare traveler

I'm a healthcare traveler providing 1099 contracts under my S-Corp. I must relocate for 8 to 13 weeks near customer location to provide on-site services. I'm not sure about the best way to record the travel expenses from the S-Corp perspective. How can I use the Per Diem for meals and lodging as a self-employed by my own S-Corp?