There should be an indicator knob on the oxygen analyzer in the front. Users will need to rotate that knob in a clockwise direction all the way. From there, they need to pump in a large enough quantity of air to get the sensor of the device conditioned well enough. Then, people need to turn the knob until it is in the 20.9 position, or whatever position is the equivalent for the oxygen analyzer in question.
The hand pump should be equipped with an area that people will squeeze in order to pump enough oxygen into the device to run the test in the first place. They will need to keep squeezing and releasing the pump in order to make this work. Performing this action is similar to the act of inflating a bicycle tire. It should only take a number of seconds for people to get all of the air that they need at this stage, so they should generally not worry about having to set aside too much time for it.
The oxygen analyzer tube should have a suction side. People should insert that suction side to any storage structure gas sampling port or anything similar that they have with them. From there, it’s important to keep pumping the air into the oxygen analyzer, because people will need a large quantity of air in order to really complete this step in the first place.
Then, users will need to squeeze the hand pump and hold it in that position. This is to get the lowest available reading to present itself in the LCD. From here, people should be able to get the information that they want.