Final answer:
When using a Dräger or Gastec tester, technicians must follow manufacturer's guidelines, ensure proper calibration and safety protocols to achieve accurate and safe results.
Step-by-step explanation:
When using a "Dräger" or "Gastec" type tester, the technician must ensure that the testing device is used correctly according to the manufacturer’s instructions. This involves checking that the device is properly calibrated, the correct testing medium is used, and the test is conducted under suitable environmental conditions to obtain accurate results. It is also critical to ensure that all safety protocols are followed to protect both the technician and the patient from potential hazards associated with the testing process.