Oklahoma Administrative Code
Title 310 - Oklahoma State Department of Health
Chapter 638 - Drug and Alcohol Testing
Subchapter 5 - Drug Screen Testing Facilities
Section 310:638-5-7 - Instruments and equipment

(a) Volumetric pipettes and measuring devices shall be certified for accuracy or be checked by gravimetric, colorimetric, or other verification procedure. Automatic pipettes and diluters shall be checked for accuracy and reproducibility before being placed in service and periodically thereafter.

(b) There shall be written procedures for instrument set-up and normal operation, a schedule for checking critical operating characteristics for all instruments, tolerance limits for acceptable function checks and instructions for major trouble shooting and repair. Records shall be available on preventive maintenance.

(c) There shall be written procedures for the actions to be taken when systems are out of acceptable limits or errors are detected. There shall be documentation that these procedures are followed and that all necessary corrective actions are taken. There shall also be in place systems to verify all stages of testing and reporting and documentation that these procedures are followed.