LT Study Guide Gt Fire Meter Flashcards
1) Methane has a LEL of __% and a UEL of ___% in air at room Temp.
a. 5%, 15%
2) A Concentration of 5% methane in air is equivalent to _____ PPM.
a. 50,000 PPM
3) 10% of the LEL is equivalent to ____ PPM
a. 5,000 PPM
4) Concentrations of ____ PPM (___%LEL/ _% Volume) are considered IDLH
a. 50,000, 100, 5
5) The Gt Fire meters should be turned on in ___ ___ to calibrate.
a. Fresh air
6) Natural gas is ___ than air so it will ___ quickly
a. Lighter, rise
7) Gt fire meters are equipped with __ sensors
2
8) The first sensor is a direct read in PPM from ___ to ___ PPM and is designated as ____ under the reading number.
a. 0-2000, PPM CH4
9) Once the meter is over 2000ppm methane it switches to the second sensor that reads ___ ( not ____) and it is designated as ____ under the reading number
a. % of LEL, volume, %LEL
10) Because of lag time when transferring from one sensor to the other it won’t always transition from 2000PPM to an exact reading of __%LEL it may start at less than __%
a. 4, 4
11) At 20% of LEL the meter with read ___, you will have to go to cleaner air go to “menu” then select ___ ___ to resume the normal detection mode.
a. HIHI, LEAK TEST
12) GT fire monitors with still operate as intended even if the ___ is past due.
a. Calibration
13) GT fire meters are on a ___ calibration schedule
a. Quarterly
14) Contact station __ if you need calibration or service
13
15) Meters need to be run for _____ in fresh air before turning off
a. 1-2 minutes
