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Training Bulletins > TB 150 - Drager X-am 5000 Combustible Gas Indicator > Flashcards

TB 150 - Drager X-am 5000 Combustible Gas Indicator Flashcards

1
Q

The Dräger X-am 5000 will provide beneficial information at the following incidents:

A

• Natural gas or methane leak

• Explosion and/or any potentially explosive atmosphere

• Confined space

• Trench Rescue

• Metro-Rail

• Oxygen enriched or depleted atmosphere

• Hazardous Materials

• Overhaul

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2
Q

Dräger X-am 5000 combustible gas meter (CGI) is equipped to detect what 5 gases?

A
  1. Carbon Monoxide (CO)
  2. Oxygen (O2)
  3. Hydrogen Sulfide (H2S)
  4. Hydrogen Cyanide (HCN)
  5. Methane / all explosive hydrocarbons (pentane, butane, propane, ect.)

(Pay attention to gas abbreviations)

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3
Q

Fresh air calibrations are performed in the field by emergency responders.

Gas-specific calibrations are performed by HazMat Squad personnel every ____ months and anytime the meter’s start-up self test indicates a sensor problem.

A

6 months

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4
Q

5 Gas Meter Status symbols:

A
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5
Q

At start-up, the X-am 5000 goes through a testing sequence that evaluates the health of each sensor.

The meter must not be used if the “____” symbol is displayed in the UPPER RIGHT corner of the screen.

A

“X” (Fault symbol)

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6
Q

The manufacturer DOES NOT guarantee this device to be intrinsically safe in oxygen-enriched atmospheres.

Immediately leave any area with oxygen reading GREATER THAN _____%. There is a danger of explosion.

A

23.5%

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7
Q

Do not store near or use ______ spray (commonly found in the fire station) on the 5 gas meter. It will be damaged.

A

Silicone spray

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8
Q

5 gas meters are not intended for use in chemical atmospheres with wide FLAMMABILITY ranges such as _______ or ________.

A

-Hydrogen or Acetylene.

(Because these chemicals have such wide ranges you could potentially already be in an explosive environment the moment your meter detects the presence of a flammable atmosphere. IMMEDIATELY exit and request HAZMAT)

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9
Q

The X-am 5000 is set to alarm at:

-_____% of the LEL for the A1 alarm

-_____% of the LEL for the A2 alarm.

A

10% A1

20% A2

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10
Q

The following must be done before the meter is used:

A

• Check for warning symbol (!) – The device CAN BE operated normally with the warning symbol on the display. (Contact Hazmat after)

• Check for fault message symbol - SHALL NOT be used at an incident if present

• Perform a fresh air calibration.

• Clear the peak values.

• Check that the gas sensor area is not occluded

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11
Q

If established, report all meter readings to the incident commander through the ________ Supervisor.

A

Hazardous Materials Group

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12
Q

Owners Manual snapshot:

A
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13
Q

To view peak values:

While in measuring mode, press the “_____” key for approximately 2 seconds.

A

-“Ok”

(Peak values are the highest readings the meter has been exposed to since the last time the values were cleared.)

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14
Q

Peak values must be cleared prior to using at an incident. To clear peak values:

A

• While in the measuring mode, depress the + button 3 times.

• Select the icon from the quick menu by pressing the + key then the OK key.

• The peak values will be displayed and can be cleared by depressing and holding the OK key for approximately 5 seconds.

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15
Q

Fresh Air Calibration

Sensors which have not warmed up or which are faulty will prevent the fresh air calibration and the unit will display the message “_____” with the symbol (!) signifying a warning message.

A

“159”

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16
Q

A fresh air calibration must be done prior to using at an incident. To perform a fresh air calibration:

A

• After the meter has warmed up depress the + button 3 times.

• Select the fresh air calibration symbol from the quick menu by pressing the + key then the OK key.

(If fault occurs, repeat calibration. Contact Hazmat if unsuccessful)

17
Q

The battery pre-alarm (A1) is indicated by a SINGLE intermittent activation of the audible, visual and vibration alarms and the 1/3 full battery symbol will flash on the right side of the display.

The battery will last approximately ____ minutes

A

20 mins

18
Q

The battery main alarm (A2) is indicated by a DOUBLE intermittent activation of the audible, visual and vibration alarms. The empty battery symbol will flash on right side of display.

The device will automatically switch off after ____ seconds.

A

10 seconds.

19
Q

Battery health must be monitored and maintained with vigilance because the health of the chemical sensors is tied directly to battery voltage.

  1. Field testing has shown batteries last no more than ____ to ____ weeks.
  2. When batteries are replaced, it will take up to _____ minutes for the device to warm up.
A
  1. 2 to 3 weeks
  2. 30 mins
20
Q

The following must be done after the meter is used:

A

• Perform a fresh air calibration.

• Document then clear the peak values.

• Verify the fault symbol, is not displayed.

• Contact the closest HazMat Squad at the earliest convenience for a Bump Test.

21
Q

A ______ Test is required by HAZMAT anytime the meter registers readings after being used in suspected IDLH atmospheres

A

Bump Test

22
Q

Weekly checks performed by field personnel:

A

• Turn on device and check battery icon, replace batteries if LESS THAN ¾ full.

• Perform a fresh-air calibration

• Keep device clean.

23
Q

Maintenance performed by HazMat Squad personnel:

• Recommended calibration interval for all chemical sensors is _____ days.

• A Bump Test will be performed anytime the meter ___________.

A

180 days (6 months)

has been used at an incident and has registered readings.

24
Q

Alarm Points Chart:

A
25
Q

The combustible gas sensor may display incorrect readings in oxygen-poor atmospheres with less than ___% oxygen

A

10%

26
Q

________ is the level a worker can be exposed to a chemical substance for an 8 hr/day, 40hr/work-week schedule WITHOUT adverse health effects.

A

-Time Weighted Average (TLV-TWA)

This is where the 1st Alarm (in PPM) is set for CO, H2S, and HCN

27
Q

“Short Term Exposure Limit” (TLV-STEL) is an ACUTE or spot exposure for a duration of _____ minutes, whereas workers WOULD NOT suffer irritation, irreversible tissue damage, or impairment.

A

15 mins

This is where the 2nd Alarm (in PPM) is set for CO, H2S, and HCN

28
Q

Immediately Dangerous to Life or Health is the exposure is likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment.

What are the “IDLH” thresholds in PPM for:
1. Carbon Monoxide (CO)
2. Hydrogen Sulfide (H2S)
3. Hydrogen Cyanide (HCN)

A
  1. Carbon Monoxide 1200 ppm
  2. Hydrogen Sulfide 100 ppm
  3. Hydrogen Cyanide 50 ppm
29
Q

The A1 and A2 alarm levels were purposefully set at such low levels of concentration to provide:

A

the user a large safety buffer between the time a hazardous gas is detected and the time an actual FLAMMABLE atmosphere exists.

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