Drager x-am 2500 Gas Meter
Our department uses a Drager 2500 gas meter, which is typically carried on Engine 31.
This meter is simple to operate:
1) To turn on, push and hold the green 'OK' button through the 3-2-1 countdown.
2) The meter will go through a self-test for several minutes. See image to the right. Notice the exclamation point icon in the upper right hand portion of the screen. This indicates the meter is in self-test mode and IS NOT ready to use. Self-test mode lasts for approximately 7 minutes.
3) In the lower right hand portion of the screen is the battery level indicator. Ensure this is full. If not notify an officer immediately.
4) Once the exclamation point indicator goes off the meter has completed it's self-test mode. Before being ready for use a fresh air calibration must be complete. This calibration takes approximately 20 seconds. Push the blue "+" key three times rapidly. You will see a fan symbol with the words 'CAL'. Press "OK". You will then see the main screen which will display the actual Oxygen reading. Press "OK" a second time. The meter is now ready for use.
5) The video to the left is around 2 minutes long and takes you through the start-up, shut down and fresh air calibration.
6) This meter will alert if anything hazardous is detected. The meter is built to display Methane's (CH4) lower explosive limit, percentage of Oxygen, Carbon Monoxide in Parts per Million, and Hydrogen Sulfide (H2S) in Parts per Million. This meter will not only detect these gases but will alarm when dangerous amounts are present in the air.
5) To turn off the meter push and hold the blue "+" button and the green "OK' button simultaneously through the 3-2-1 countdown.
Click HERE to view specification sheet
Click HERE to watch a video on turning the meter on and off as well as starting the fresh air calibration.
Our meter detects several things.....why are these important?
Methane (CH4) - Methane is a major component in many fuels, particularly Natural Gas. It is nontoxic but extremely flammable and is violently reactive to oxidizers. It is an asphyxiant and may displace Oxygen in a small space.
LIGHTER THAN AIR
Oxygen (O2) - This meter will display the amount of oxygen present in the atmosphere. Normal range is between 20.8 and 21%. An oxygen deficient atmosphere is anything below 19.5% which may result in difficulty breathing. Anything over 22% is considered an oxygen rich atmosphere and presents a significant risk for fire and explosion.
Carbon Monoxide (CO) - Carbon Monoxide is an odorless and colorless gas found in fumes any time you burn fuel. It can prevent cellular respiration which limits your bodies ability to properly use oxygen and can lead to carbon monoxide poisoning. CO is also a flammable fuel, often time first responders focus on the respiration related side effects and fail to recognize this.
LIGHTER THAN AIR
Hydrogen Sulfide (H2S) - Gas commonly associated with production of oil and natural gas. Also present in large quantities in "Sewer Gas" and from wastewater processes. It is colorless, flammable, poisonous and corrosive and will have a rotten egg smell. Similar hazard to CO in that it prevents cellular respiration. Low level exposure can deaden your sense of smell leading to long term exposure.
HEAVIER THAN AIR