TB 150 Drager X am 5000 Flashcards
It is equipped with 4 gas-specific sensors:
carbon monoxide (CO), oxygen (O2), hydrogen sulfide (H2S), hydrogen cyanide (HCN) and a fifth catalytic sensor for explosive vapors.
The additional HCN sensor is important because recent studies have shown significant levels of cyanide during ____ following the combustion of modern synthetics.
overhaul operations
The X-am 5000 is a ____ meaning it does not have a mechanical pump to draw in air samples
passive monitor
It is extremely important to move the meter ____, ____ as you monitor an unknown atmosphere
high, low / left and right
Fresh air calibrations are performed in the field by ____, and _____ are performed by HazMat Squad personnel every ___ and anytime the meter’s start-up self test indicates a sensor problem.
emergency responders / gas-specific calibrations / six months
Oxygen, carbon monoxide, hydrogen sulfide and hydrogen cyanide are detected using ____.
electrochemical sensors
The X-am 5000 displays in ___.
ppm
Battery life
100% / 2/3rd full / 1/3rd full / empty
THE METER MUST NOT BE USED IF THE _____ IS DISPLAYED IN THE UPPER RIGHT CORNER OF THE SCREEN.
x SYMBOL
The DrägerSensor CatEX 125 (combustible gas sensor) is a transducer for measuring partial pressure of ___ in the atmosphere.
flammable gases or vapors
The combustible gas sensor is calibrated to ___ but it will detect all explosive hydrocarbon atmospheres such as ____ and will display those readings in the display for methane.
methane / pentane, butane, propane etc.
The combustible gas sensor may display incorrect readings in oxygen-poor atmospheres with less than ___ oxygen.
10%
The manufacturer does not guarantee this device to be intrinsically safe in oxygen-enriched atmospheres with greater than ____ oxygen. Leave any area with oxygen reading greater.
23.5%
The DrägerSensor CatEX 125 can be damaged by _____.
volatile silicone, sulfur, heavy metal compounds or halogenated hydrocarbons
Do not store near or use ___ on this meter.
silicone spray
Hydrogen has a flammability range of ____.
4%-75%
Acetylene has a flammability range of ___.
2.5%-100%
Is not intended for use in chemical atmospheres with wide flammability ranges such as _____.
Hydrogen or Acetylene.
The flammability range of methane is between ____ with ____ representing the lower explosive limit (LEL), the point at which there is enough methane vapors in the atmosphere to ignite
5%-15% / 5%
Methane :
15% representing the upper explosive limit (UEL), the point at which additional methane would over saturate the atmosphere and be____.
too rich to burn
The X-am 5000 is set to alarm a t___ of the LEL for the A1 alarm and alarm at ___ of the LEL for the A2 alarm.
10% / 20%
You can see that the 10% and 20% of LEL is well below the point that a flammable atmosphere ____.
actually exists
Check for warning symbol ____– The device can be operated normally with the warning symbol on the display. If the warning symbol does not disappear automatically during operation, contact the closest ____ to evaluate/calibrate the meter.
(!) / HazMat Squad
Check for fault message symbol - The device is ___ ready to measure, shall not be used at an incident and requires further maintenance, contact the closest HazMat Squad to evaluate/calibrate the meter.
not
