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031-506-2061 (SL2) - Conduct a Mask Fit Test

Standards: Conducted a mask fit test. Performed all the steps in sequence to verify the fit of a protective mask to an individual's face.

Conditions: Given an M41 Protection Assessment Test System (PATS); M17-, M40-, M42- and M45- series protective masks; PATS operator manual; TC 3-41; and any of the following situations:

  1. You are directed by the commander to conduct a mask fit test.

  2. You have a soldier(s) who requires an initial issue, an annual verification, or a replacement mask issue.

  3.  This task will NOT be performed in MOPP 4.

Standards: Conducted a mask fit test. Performed all the steps in sequence to verify the fit of a protective mask to an individual's face.

Performance Steps

1.   Prepare the mask for the fit test (M40-, M42-, and M45-series).

a. Attach the drink tube sampling adapter to the drink tube quick-disconnect coupling.

b. Have the soldier sit down for the fit test.

c. Have the soldier don the mask.

d. Instruct the soldier to blow as hard as possible several times into the internal drink tube mouthpiece to remove any trapped fluids or foreign matter. Ensure that the drink tube is clear so foreign matter will not be drawn into the protection assessment test instrument (PATI) and the PATI will be able to draw air from inside the mask.

Note.  THIS IS A CRITICAL STEP.

e. Have the soldier adjust the face piece and tighten the head harness.  Ensure that the face piece is properly fitted.

2.   Prepare the mask for the fit test (M17-series).

a. Attach the drink tube sampling adapter to the drink tube quick-disconnect coupling.

b. Attach the drink valve retaining lever to hold the drink valve open.

c. Have the soldier sit down for the fit test.

d. Have the soldier don the mask.

e. Instruct the soldier to blow as hard as possible several times into the internal drink tube mouthpiece to remove any trapped fluids or foreign matter. Ensure that the drink tube is clear so foreign matter will not be drawn into the PATI and the PATI will be able to draw air from inside the mask.

Note.  THIS IS A CRITICAL STEP. 

f.  Have the soldier remove the mask.  Insert the sample tube extension into the internal drinking tube mouthpiece.

g. Remove the drink valve retaining lever from the drink valve lever.

WARNING

Have the soldier close his eyes while putting the mask on to prevent the sample extension tube from touching and possibly injuring his eyes.

h. Instruct the soldier to don the mask. Ensure that the sample extension tube is properly positioned.

i.   Adjust the face piece, and tighten the head harness.  Ensure that the face piece is properly fitted.

j.   Attach the drink valve retaining lever so the drink valve is held in the open position for the duration of the fit test.

3.   Conduct a mask fit test (M17-, M40-, M42-, and M45-series). (See the PATS operator's manual.)

Note.  It is important that smoking not be permitted in the immediate area where the fit test is being conducted. The soldier should not smoke for at least 30 minutes before the test.  To achieve proper results, the soldier should not talk during the test.

a. Remove the high-efficiency particulate air (HEPA) filter from the twin tube assembly.

b. Attach the twin sample tube (marked "SAMPLE") to the sample port on the end of the drink tube sampling adapter.

c. Monitor the reading on the display with the PATI in the count mode and have the soldier remain still until an acceptable reading of 3.0 particles/cubic centimeters or lower is obtained.

d. Press the FIT TEST key on the keypad after obtaining an acceptable seal to bring the instrument into the standby fit test mode.

Note.  Before continuing to the next step, brief the soldier on how to perform the exercises outlined in the operator's manual. The soldier should be instructed to breathe normally during all exercises except the deep breathing exercise.

e. Verify the number of exercises is set to S by pressing the NUMBER OF EXERCISES key.

f.  Press the START/STOP TEST key to begin the fit test.  Instruct the soldier to perform the first exercise.

g. Have the soldier remove his mask after the test is complete, and PASS is indicated.

h. Remove all testing attachments from the soldier's mask.

i.   Repeat the test if FAIL is indicated. (Repeat steps 3f and 3g.)

Evaluation Preparation:

Setup: Ensure that the items required in the conditions section are available to the soldier. A soldier with a mask must be available.

Brief Soldier: Tell the soldier to conduct the mask fit test based on the type of protective mask issued.

Note. Performance measures will vary depending on type of mask being fitted (M17-, M40-, M42-, or M45-series.

Performance Measures

GO

NO GO

1.   Prepared the mask for the fit test (M40-, M42-, and M45-series).

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2.   Prepared the mask for the fit test (M17-series).

--

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3.   Conducted a mask fit test (M17-, M40-, M42-, and M45-series).

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Evaluation Guidance: Score the soldier GO if all performance measures are passed. Score the soldier NO GO if any performance measure is failed. If the soldier fails any performance measure show him how to do it correctly.

References

 

Required

Related

 

TC 3-41

TM 3-4240-279-10

 

 

TM 3-4240-279-20&P