27-02 MSA Altair 4x Multi- Gas Detector Flashcards
1
Q
How is O2 concentration gas sensor expressed?
A
on meter in percentage
2
Q
What does COMB/ EX sensor measure? How expressed?
A
- amount of combustible/ explosive gas present in environment
- as a percentage of the LEL
3
Q
How is CO expressed?
A
PPM
4
Q
Where does Hydrogen Sulfide commonly collect? How expressed?
A
- in sewers
2. PPM
5
Q
What is Bump Check?
A
brief, daily exposure of monitor to known quantities of target gases to verify sensor recognition and operation of alarms
6
Q
What is calibration?
A
a longer exposure to known quantity of target gases that allows detector to adjust settings to quantity of gas.
7
Q
What should be worn to any gas monitoring incidents?
A
SCBA
8
Q
Where should readings be taken in environment? (3)
A
- at head level
- waist level
- ground level
