Deck: Safety

1. A Move back and forth and finally stabilize at the correct reading after about 10 seconds
2. B Rise to the correct reading and then, slowly fall to zero as the oxygen in the sample is consumed
3. C Slowly rise to the correct reading and then remain stationary
4. D Rise to the correct reading immediately and then rise slowly to a false reading as the operating temperature increases

Tip: press A-D to answer