Table 2-1. Filter Change Criteria for M12AI Gas Filter and M13 Particulate Filter

TM 3-4240-201-13

Figure 2-1. Filter unit, hose, and headpiece connections to hospital beds, recognition view.

Table 2-1. Filter Change Criteria for M12AI Gas Filter

2-5.

Removing and Cleaning Headpiece

and M13 Particulate Filter

a. Removal of Headpiece. Untie the strap. Lift the

headpiece clear of the patient's head.

Place the

Physical damage.

headpiece near the patient ready for immediate use.

Place the toggle switch on the transformer case in OFF

Water immersion.

position.

b. Sanitizing of Headpieces. After each use, clean

Low airflow to headpieces (cause resistance in

the headpiece inside and out. Use a clean cloth that has

filter). Organizational maintenance personnel

been dipped in warm soapy water solution (item 3, table

will determine what fault is.

1-1). Rinse by wiping with a clean cloth that has been

dipped in warm clear water and wrung almost dry. Air-

10,000 hours of operation (no chemical agent

dry all surfaces of the headpiece.

used wartime operation).

c. Decontamination

Headpieces.

Decontaminate the headpieces in accordance with

1,500 hours (approx 5 months) of operation

instructions in TM 3-220.

(chemical agent used-wartime operation).

2-6.

Filter Change Criteria

After each CK attack-change as soon as

possible.

Refer to table 2-1 to check the remaining protective life

of gas filters. Notify organizational maintenance

At beginning of combat conditions and when use

personnel to replace the gas filter when one or more of

of CK is expected.

the conditions in table 2-1 are met.

2-2