TM 09241 B-12&P
Rinse two comparator cells (6) and (7) three times with water being tested.
Fill the first comparator cell (6) as indicated up to mark 0.51 oz (15ml) with water to be tested.
DPD no. 1 chlorine test tablets are irritating to eyes, respiratory tract, and may cause allergic skin reaction.
Provide ventilation when handling and wear safety glasses and gloves.
Comparator cells are fragile. Care must be taken when crushing DPD no. 1 tablets.
Chlorine test must be performed rapidly once tablets are mixed with water.
Put a small amount of water from the first comparator cell (6) into a second comparator cell (7) and add two
DPD no. 1 chlorine tablets (11) to second comparator cell (7). Crush tablets with plastic rod (12) to dissolve. Pour
remaining water from the first comparator cell (6) into the second comparator cell (7) and insert into left slot in housing (2).
Refill first comparator cell (6) as indicated up to mark 0.51 oz (15ml) with water to be tested and insert into
right slot in housing (2).
Hold the comparator housing (2) up and look through the eyepiece (3). Face a good light source (daylight but
not the direct rays of the sun, or artificial light reflected from a white surface). Be sure your fingers do not cover the light
window in the back of the comparator housing. Rotate the color disc (10) until a color on the disc matches the color of the
comparator cell (7) in the left opening. The reading can be made directly from the window (5) in the front of the comparator
housing. If color falls between readings, estimate.
Remove comparator cells (6) and (7) from comparator housing (2) and discard water samples and solutions.
Thoroughly rinse all equipment with demineralized or distilled water.
(4) Remove eyepiece (3) and color disk (4) or (10) from housing (2) and carefully pack all equipment back into
carrying case (1). Close and latch cover.
Replace any supplies used during testing.
Carefully pack all equipment and supplies into case. Close and latch the case.
2-13. OPERATION OF CHEMICAL AGENTS WATER TESTING KIT.
See TM 3-6665-319-10. Be sure to observe all warnings and special medical information in appendix E of TM
2-14. INFORMATION PLATES.
The identification plate is attached to the exterior top of the case. The two sided instruction plate is secured to the
inside of the case by a chain.