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a. The CAM operating procedures consist of:

(1) Changing mode (G to H or H to G) - procedures for changing from one mode to the other are given (para 2-6b).

(2) General use - general use of the CAM is discussed (para 2-6c). Your Training Circular 3-4-1 will provide details on using the CAM during a mission.

(3) Interferents - a few harmless vapors in the atmosphere can give false responses in CAM (para 2-6d).

(4) Malfunction recognition - certain readings on the CAM display indicate a malfunction (para 2-6e) during operation.

(5) Removing CAM from operation - procedures for decontaminating and cleaning the CAM are given (para 2-6f).

(6) Shutdown - shutdown procedures are listed (para 2-6g).

b. Changing Modes: G to H or H to G. NOTE

If agent has been identified prior to switching modes, replace filtered nozzle standoff.

To change modes, proceed as follows:

(1) Observe the display (1) to see which mode is shown. Press G/H mode push-button switch (2); verify that display (1) indicates the other mode. WAIT will be displayed for several seconds. When WAIT has

disappeared, proceed. The three dots may also appear following the mode change - ignore them. If display flashes on and off, go to troubleshooting symptom 4 (para 3-3).

(2) Perform a confidence test (para 2-5d or 2-5f [1 thru 6 only]).

(3) Place confidence sample (3) into pocket (4) of carrying harness (5).

c. General Use.

CAUTION

Do not contaminate the filtered nozzle standoff by allowing it to come in contact with liquid agent.

During operation in very dusty conditions, frequently inspect the filtered nozzle standoff for collection of dust. If dust is visible, remove and replace with a new filtered nozzle standoff. If possible, perform this action away from the dusty conditions.

Avoid excessive exposure to simulant/agent. As soon as CAM responds to simulant/agent, back away from simulant/agent. Saturating CAM with

simulant/agent will add to clear-down time and cause maintenance down-time. Handle CAM carefully. It is a sensitive instrument and can be damaged by dropping it or by bumping the nozzle.

NOTE

Get to know your operating environment (know local interferents). Do not obstruct the filtered nozzle standoff.

(1) If the operation of the CAM is in doubt at any time, the filtered nozzle standoff should be removed and the nozzle protective cap assembly replaced on the nozzle assembly. When the display has cleared down to zero or one bar, the nozzle protective cap assembly is removed and a new filtered nozzle standoff installed. A confidence test is performed, and monitoring can then continue.

(2) When a constant number of bars are continually shown on the display, it usually Indicates that contamination is present in the surrounding area or on the nozzle. Discard filtered nozzle standoff as contaminated waste. Do not allow CAM to continuously monitor contamination of any kind.

(3) Because the CAM is a point monitor and can report conditions only at the front of the nozzle assembly, it is necessary to move the CAM around the area when carrying out a complete reconnaissance.

c. General Use. (Cont).

NOTE

If there is a source of vibration in the area, WAIT may be displayed momentarily. Searching for agent should cease until WAIT

disappears.

(4) When monitoring for contamination on a person, object, vehicle, aircraft or piece of equipment, it is essential to first establish what general vapor hazard (G or H) is suspected. Be aware of the wind speed and direction.

CAUTION

Do not switch CAM off for end of mission or storage if more than one bar is displayed.

(5) Switch CAM off when not in use to extend battery life.

(6) In cold weather, liquid contaminants may not release sufficient vapor to produce a reading on CAM.

d. Interferents.

NOTE

Monitoring with CAM is usually done outdoors while in Mission Oriented Protective Posture (MOPP IV). Cleaning materials or perfumes may be a problem.

(1) There are a few vapors present in the atmosphere that can, in some circumstances, give a false response in CAM. The situations most likely to give a false response are in enclosed spaces or when sampling near strong vapor sources, for example, in a motor pool engine test bay. If it is possible, get to know your local environment during training periods. Determine if, for example, there are any responses in the galley, the sick bay or the hangar. Some of the types of vapors that have been found to give false readings are given in the following paragraphs:

d. Interferents (Cont).

(a) Cleaning compounds. Some cleaning compounds and disinfectants contain additives which give them a pleasing smell. Some of these additives such as menthol and methyl salicylate (MS) can give false responses in the H or G mode. Cleaning materials are by their very nature spread over large surface areas and, therefore, provide a considerable vapor source, particularly in enclosed spaces.

(b) Aromatic vapors. Included in this group of materials are perfumes and food flavorings. Some brands of aftershave and perfume can give a response in G mode when CAM is held close to the skin, for example, in casualty handling procedures. Some sweets, such as peppermints, cough lozenges and menthol cigarettes can cause a response in G mode if the breath is exhaled directly into the CAM nozzle.

(c) Smoke and fumes. The exhaust from some rocket motors and the fumes from some munitions can give responses.

(2) If you suspect your CAM is giving a false reading: (a) Stay masked.

(b) Check for obvious vapor sources - smoke, etc., and known interferents.

(c) Remove and discard the filtered nozzle standoff, place nozzle

protective cap assembly onto the front of CAM case and reestablish a clean air background.

(d) Remove nozzle protective cap assembly. If false response recurs, CAM may not be operable in the immediate area. Remove source of interferent (if possible) or replace nozzle protective cap and remove CAM from area.

e. Malfunction Recognition.

If one or more of the following symptoms occur during operation, refer to the troubleshooting symptom index in para 3-3.

(1) Backlight not operating.

(2) BL shown on display during operation.

(3) Display disappears.

(4) Display flashes on and off.

(5) Does not change mode from G to H or H to G.

(6) Does not clear down to zero or one bar in 2 minutes (or 5

f. Removing CAM from Operation. WARNING

A contaminated CAM can cause death or injury to personnel.

(1) If contamination is suspected, refer to para 2-17 for decontamination procedures. If CAM is not contaminated proceed to step 2.

NOTE

In conditions below 40°F (4°C) take CAM to a warm area, if possible, to carry out the shutdown procedure. When operating in wet conditions, try to avoid trapping moisture on nozzle assembly or inside the nozzle protective cap assembly. Trapping of water in this way may result in increased start-up time or reduced sensitivity.

f. Removing CAM from Operation (Cont).

(2) Remove and discard filtered nozzle standoff (1) from nozzle assembly (2). (3) Inspect nozzle assembly for indications of moisture. If droplets of water are

noticed, attempt to shake off moisture.

(4) Twist (counterclockwise) and remove nozzle protective cap (3) from environmental cap (4).

(5) Twist and install nozzle protective cap (3) onto CAM (5).

(6) Remove buzzer (6) from electrical connector and install environmental cap (4) on electrical connector.

CAUTION

Do not switch CAM off when one or more bars are showing because this action stops the purging of any contaminant remaining, this would extend the warm-up time on future use.

NOTE

CAM normally clears down to zero or one bar within 2 minutes. If CAM is contaminated, it may take at least 1 hour to clear down to zero or one bar. (7) Observe display (7). If display shows zero or one bar, press G/H

pushbutton switch to change modes of operation. Observe display (7). If display shows zero or one bar, CAM is ready for shutdown procedure. If more than one bar shows, let CAM run until display shows zero or one bar. Allow CAM to run an additional 5 minutes after the display has cleared to zero or one bar.

f. Removing CAM from Operation (Cont).

(8) If CAM fails to clear down, in either mode, within 1 hour, refer to troubleshooting symptom 7 (para 3-3).

(9) Perform shutdown procedure (para 2-6g).

g. Shutdown.

Make sure you have completed “removing CAM from operation" (para 2-6f). When the display (1) shows zero or one bar (in both modes), press ON/OFF push-button switch (2) to shut CAM off. Remove battery before storing CAM in the case.