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
While in measuring mode, press the OK key for approximately___. Peak values will be displayed. Peak values are the highest readings the meter has been exposed to since the last time the values were cleared.
2 seconds
The battery pre-alarm (A1) is indicated by a single intermittent activation of the ____.
audible, visual and vibration alarms.
1/3 full battery symbol will only last
approximately 20 minutes
Empty battery symbol will
automatically switch off after 10 seconds
Field-testing has shown batteries last no more than ____. This device requires 2 – AA alkaline batteries.
2 or 3 weeks
When the batteries are replaced, it will take up to ___ for the device to warm-up.
30 minutes
A Bump Test is required anytime the ___ after being used in suspected IDLH atmospheres (not after weekly)
meter registers readings
Turn on device and check battery icon, replace batteries if less than ___.
¾ full.
Oxygen alarm points
Lower 19.5% Upper 23.5%
Carbon Monoxide alarm points
A1 25 ppm / A2 50 ppm / IDLH 1200 ppm
Hydrogen Sulfide
A1 10 ppm / A2 15 ppm / IDLH 100 ppm
Hydrogen Cyanide
A1 4.70 ppm / A2 10 ppm / IDLH 50 ppm
Methane
A1 10% / A2 20%
Time Weighted Average (TLV-TWA): The level a worker can be exposed to a chemicalbsubstance for an 8 hr./day, 40-hr/week-work schedule. Without adverse ____
health effects
Short Term Exposure Limit (TLV-STEL): An acute or spot exposure for a duration of ____, whereas workers would not suffer irritation, irreversible tissue damage, or impairment.
15 minutes
Carbon Monoxide S/S
Headache / Nausea / Vomiting / Dizziness / Fatigue / Confusion / Syncope / Cherry Red Hue / Visual Disturbance
Hydrogen Sulfide S/S
Eye Irritation, sore throat , cough , nausea , SOB , loss of sense of smell, PULMONARY EDEMA
Hydrogren Cyanide S/S
Restless / Rapid Breathing / Dizziness / Weakness / Headache / Nausea / Vomiting / Rapid heart rate / Convulsions
Methane S/S
Flammable/ Explosive but non toxic / Large amounts can cause oxygen displacement leading to Asphyxia
