Alarm, Chemical Agent, Automatic, (ACAA) M22 Terminal Learning Objective Action: Operate, Maintain, and Emplace the M22 Alarm, Chemical Agent, Automatic

Alarm, Chemical Agent, Automatic, (ACAA) M22

Terminal Learning Objective

• Action: Operate, Maintain, and Emplace the M22 Alarm, Chemical Agent, Automatic (ACAA)

• Conditions: Given an M22 ACAA, accessories, TM 3-6665-321-12&P, in a training environment

Terminal Learning Objective

• Standards: Operated, Maintained, and Emplaced the M22 ACAA IAW TM 3-6665-12&P. Without causing injury or damaging equipement.

Lesson Administrative Data

• Safety Requirements: Students must wash their hands with warm water and nonabrasive soap after handling the ACAA. The cell module of the M88 detector unit contains Radioactive Nickel-63, which is controlled by the U.S. Nuclear Regulatory Commission (NRC)


• Risk Assessment Level: Low

• Environmental Considerations: NOTE: It is the responsibility of all soldiers and DA civilians to protect the environment from damage.


• Evaluation: Hands on evaluation and Written exam during STX training.

ENABLING LEARNING OBJECTIVE 1

• Action: Operate the M22 Automatic Chemical-Agent Alarm

• Conditions: Given an M22 automatic chemical-agent alarm (ACAA), BA5590/U or BB390A(B)/U batteries or an M28 power supply, an M42 remote alarm, BA 3030/U batteries (for an M42), a confidence sampler, a piece of field wire, Technical Manual (TM) 3-6665-321-12&P, and a directive to employ the alarm in the fixed emplacement mode. This task may be performed in MOPP 4.

ENABLING LEARNING OBJECTIVE 1

• Standards: Operated the M22 ACAA by performing operator-level preventive-maintenance checks and services (PMCS) and without causing equipment damage. Standards are not degraded due to performance in MOPP 4

Learning Step / Activity 1

• Identify the proper safety procedures for storage, shipment, and disposal of chemical detectors. Ensure compliance with TM 3-6665-321-12&P and local regulations

Warnings

• IF THE DETECTOR IS DAMAGED, NOTIFY YOUR CHEMICAL, BIOLOGICAL, RADIOLOGICAL, NUCLEAR (CBRN) NONCOMMISSIONED OFFICER (NCO).

• THE CBRN NCO MUST THEN NOTIFY THE CBRN OFFICER AND THE RADIATION PROTECTION OFFICER (RPO)

Warnings

• Dispose of a damaged M88 detector (with all damaged pieces) in a plastic bag, and ship it in the original packing container, if available, to direct support maintenance for evaluation. Wash immediately with nonabrasive soap and water if skin contact is made with any area thought to be contaminated

Warnings

• DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE THE PROPER SAFETY PRECAUTIONS WHEN PERFORMING MAINTENANCE PROCEDURES

• (1) Disconnect the power supplies before performing maintenance to prevent death or possible serious injury

Warnings

• (2) Disconnect the M28 power supply from the alternating current (AC) power outlet or direct current (DC) power outlet before any connection or disconnection is made

• HIGH VOLTAGE IS USED IN THE OPERATION OF THIS EQUIPMENT

Check on Learning

What are the proper safety procedures for storage, shipment, and disposal of chemical detectors?

Notify your Chemical, Biological, Radiological and Nuclear Noncommissioned Officer (NCO)The CBRN NCO must then notify the CBRN Officer and the Radiation Protection Officer (RPO)


• Identify the characteristics and capabilities of the M22

Capabilities and Features

• Automatically detects nerve and blister agents in the air

• provides warnings (audible and visual)• remote alarm unit (audible and visual)• various electrical power sources

Characteristics • Operates in fixed, portable or vehicle-

mounted configurations

• All-weather operational

• Fully functional under dusty conditions

Detection Capabilities

The M22 alarm system can detect the following nerve and blister agents:

• Tabun (GA) • Sarin (GB) • Soman (GD) • V-series nerve agents (VX) • Mustard (HD)• Lewisite (L

False Alarms

Elements that can cause the M22 alarm system to give a false alarm include:

• JP8 fuel • brake fluid • aqueous fire fighting foam (AFFF) • malathion insecticide • muscle rubs • M18 marking grenades (red and

violet) • tear gas

Power Requirements

The M88 detector unit operates at a nominal currency of 24 volts DC, 0.6 ampere. The BA5590/U dry lithium sulfur dioxide battery will supply 24 volts DC for approximately 12 hours. When operating in temperatures below –22 °F, the battery life drops to 3 hours. The M42 remote alarm operates at a nominal currency of 6 volts DC

Check On Learning

What type of agents does the M88 detect?Nerve and Blister

What will give false alarms?JP8 fuel, brake fluid, aqueous fire fighting foam (AFFF) ,malathion insecticide ,muscle rubs, M18 marking grenades (red and violet) tear gas


• Identify the major components, auxiliary equipment, and operator’s controls and indicators on the M22, Alarm, Chemical Agent, Automatic (ACAA)

Major Components

• Transit Case• M88 detector unit• Battery Box• Confidence Sampler• Manual

Major Components

• Transit Case: The transit case houses the M88 Detector, Battery Box, M42 Alarm, Confidence sample, protective caps, spare inlet, rain caps, and the operator’s and unit’s maintenance manual. The transit case has a single strap for shoulder carry

• M88 Detector: Automatically detects nerve and blister agents in the air. Will sound alarm and send a signal to a connected M42 remote alarm

Major Components

• Battery Box: The battery box attaches to the bottom of the M88 Detector, with the BA5590/U battery installed, it provides 24VDC power to the detector

• Confidence Sample: Contains non-hazardous stimulants that test the function and sensitivity of the M88 detector. The H end of confidence sample contains Methyl Salicylate (MES, oil of wintergreen) and the G end contains Dipropylene Glycol Monomethyl Ether (DGME )

Major Components

• Manual: Use TM 3-6665-321-12&P to conduct PMCS, Start-up and Shut-down procedures, and Troubleshooting.

Auxiliary Equipment

• M42 Alarm: Provides warning at a remote location via a warning light and or audible horn. The audible horn can be switched off if desired. The M42 is connected to the M88 detector via field wire (up to 400 meters)

Auxiliary Equipment

• M28 Power Supply: Provides DC power to M88 detector from an AC power source. Accepts 110 or 220 VAC, 50 to 400 hertz. Switches automatically to a standby battery if output drops below 23 VDC. Attaches via power cable to the side of the M88 detector. Provides 24 VDC, (plus or minus 1V)

Auxiliary Equipment

• M281 Mounting Kit: Provides a quick release frame to hold the detector and attached battery box while providing a connection block for remote alarms or alternative vehicle power. Provides a quick release frame to hold the M42 Remote alarm to a vehicle mount

WARNING: In most cases the vehicle mode is only for use of the vehicle power supply and not for mobile operations. The only exceptions being while using the M577, M113, 2 ½ ton Truck, and the M998 HMMWV. The backpack configuration is for small unit dismounted operations to facilitate transportation

Supplies

• Expendable/Auxiliary Supplies: The transit case also holds spare protective caps, rain caps, and a spare inlet in vacuum-sealed bags in the top pocket. These spares are to ensure the detector is kept clear of contamination and routine maintenance

Supplies

• BA5590/U Battery, Dry: Provides 24 VDC to M88 detector; attaches to bottom of detector inside the battery box; not rechargeable

• BA3030/U OR BB3202/UF Battery: Provides 6 VDC to the M42 Remote alarm

Check On Learning

What are some components of the M22? Transit Case, M88 detector,

Battery Box, Confidence Sampler, Manual

Name an auxiliary component?M42 alarm ,M28 power supply

M281 mounting kit

Operator Controls And Indicators

• Controls (1) Selector Switch a. Three Positions - Off - On /Audible alarm disabled - On / both audible and visual


• Indicators (A) G bar Line: Nerve agent bar

graph consisting of 8 bars that are yellow when lit

(B) H bar Line: Blister agent bar graph consisting of 8 bars that are yellow when lit


(C) Sampling Light (Green): Constantly lit during normal operation but flashes on and off during the clear-down process to indicate that the M88 detector is not sampling external air

(D) Alarm Light (Red): Normally not lit but flashes on and off when in alarm condition (three or more bars lit in either G/H bar graph)


(E) Wait Light (Yellow): Not lit during normal operation but:

(1) Constantly lit for approx. 2 minutes during internal self-checks and initial power on

(2) Flashes on and off for 10 seconds (approx.) during self-checks and following this every hour to verify pump operation


(3) Flashes on and off if the M88 detector is switched on in a cold environment (below freezing

temperature), showing the internal temperature is being raised

(4) Flashes on and off during normal operation to show a fault


• Emplacement of the M22 Alarm, Chemical Agent, Automatic (ACAA)

Emplacement

• M88 detector unit is place upwind of the M42 alarm unit

• Maximum of five M42 alarms per M88 detector

• Maximum/optimum distance between M88 detector and the unit’s perimeter is 150 meters

Emplacement

• Maximum distance between M42 alarms and M88 detector is 400 meters (WD-1/TT Commo Wire)

• Maximum distance between two M88 detectors is 300 meters

WINDDIRECTION

MAX 300 m

OPTIMUMUPWIND DISTANCE150 m

MAX LENGTH OF WD-1 WIRE 400 m

M42 ALARMS

M88 DETECTORUNITS

NOT TO SCALE

150m

150m150m 150m

EMPLACEMENT

EMPLACEMENT

... ...

...

......

...

... ... ...

Check on Learning

• Maximum of __ M42 alarms per M88 detector

5• What is the total distance of line B & C? 400m


• Perform Before and During Preventive Maintenance Checks and Services on the M22 Alarm, Chemical Agent, Automatic (ACAA)

• *Open Manuals

Check on Learning

What must be done before testing the alarm? The test must be announced, “I’m testing the alarm

What is inspected in the COMMS port?

Bent or broken pins


• Operate the M22, Alarm Chemical Agent, Automatic (ACAA)


• Step 1: Install battery• Step 2: Remove and discard the protective

caps on the M88 detector by pulling gently and turning them counterclockwise

• Step 3: In rain or dusty conditions, install rain caps. Start-up may take 30 minutes. Notify personnel within audible range that a start-up test is being performed.


• Step 4: Perform an initial power on and self-test: Prior to turning on the M88 detector, review the power on and self-test sequence located at paragraph 2.9.3.1 in TM 3-6665-321-12&P. It is important to know what indications to expect before the M88 is turned on.


• Step 5: Turn the M88 on by setting the switch position to the 1+[< position.

• Step 6: Wait 5 minutes after the green sampling light is lit constantly before performing a confidence sample.


• Perform Confidence Self-test


• If the inlet rain cap is installed, remove it before performing the confidence sample test.

• Open the “G” vapor shroud of the confidence sample

• Place the “G” vapor vent of the sample in contact with the inlet for approximately ¼ second.


• Verify that at least three “G” bars are lit, the ALARM light is flashing, and audible alarms on both the M88 and M42 alarms are sounding.

• Less than three bars are displayed, wait five minutes and then repeat the procedure.

• If less than three bars still continue to be displayed, set the selector to “0” position and repeat the initial checks, self-test, and confidence sample procedures.


• If the M88 detector continues to sound the alarm for more than 10 minutes after withdrawing the confidence sample, refer to troubleshooting instructions in TM 3-6665-321-12&P

• The M88 detector is ready for the “H” stimulant confidence test when the red alarm light is no longer lit and the “S” sample indicator is lit continuously instead of flashing.


• The alarm light and audible alarm will sound for the duration if either the “G” or “H” bar lights show three or more bars.

• If a contamination of more than five “G” and “H” bars are displayed, the unit will enter a clear-down mode and may need up to five minutes to clear.

• The highest level will be displayed until the M88 detector finds a level of three bars or less. If excessively dosed, the clear-down process may take longer than five minutes.

Check on Learning

The alarm will sound when how manybars are displayed?ThreeThe _____level will be displayed until

theM88 detector finds a level of three bars or less.

Highest


• Perform Shutdown Procedures

Learning Step / Activity 8• Ensure one bar or less is lit in both the “G” and “H”

bar graphs before setting the selector switch to the “0” position.

• If the display does not reduce to one bar or less in 10 minutes, refer to TM 3-6665-321-12&P

• If rain caps are installed, remove and stow them in the transit case.

• Insert new protective caps, one in each inlet exhaust.

• If the M88 is shut off for any reason, G and H confidence sample tests must be conducted again

• Reactivate the M22 Alarm, Chemical Agent, Automatic (ACAA) following an

operational alert.


When You Hear The Alarm

• Stop breathing and mask• Give the verbal and hand signal alarm

to your fellow Soldiers. Assume MOPP 4.

• Begin running complimentary tests (M256A1, M8, and M9 paper checks) to confirm if it is a chemical agent


• Turn off the audible alarm if the tactical situation requires it. Allow the M88 detector to clear down. Shut down the alarm

• Decontaminate the M88 detector with warm soapy water (leave rain caps in place). Be careful not to get liquid or soap in the inlet or exhaust ports.

• Rinse it off with clean water on a sponge, paper towel, or rag. Check with M8, M9, M256A1 or ICAM


• Place the M88 detector in its monitoring position and reactivate the detector. Remain masked until unit commander (unit leader) conducts unmasking procedures and gives the “ALL CLEAR” command

Check on Learning

What is the first thing that must be done when the alarm sounds?

Stop breathing and mask What must you prevent when

decontaminating the M88? Water entering the inlet or exhaust ports.

SUMMARY

• Capabilities• Major Components• Emplacement• Operation• Self Test• Shutdown Action Procedures

Documents

Alarm, Chemical Agent, Automatic, (ACAA) M22 Terminal Learning Objective Action: Operate, Maintain, and Emplace the M22 Alarm, Chemical Agent, Automatic