ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0016 00
OPERATOR INSTRUCTIONS
MAINTAINING NORMAL OPERATION UNDER USUAL CONDITIONS
MC-TWPS Free Chlorine Measurement
The measurement range is 0.05 to 6.0 mg/l free chlorine. The EPA certified range is 0.1 to 4.0 mg/l. If
the product water is being chlorinated to a level greater than 5 mg/l, dilute the water taken from the
distribution system by a factor of 2. Use the raw water priming pitcher. Rinse with product water. Fill to
1000 ml with un-chlorinated product water from the product utility hose on the TWPS. Then fill to the
2000 ml mark with chlorinated water from the distribution system.
1. Remove the Chlorine Analyzer with its case from the pack-out box (see Figure 4).
2. Fill a clean, dry cuvette to the mark with product water from the distribution system or with diluted
water if chlorinated to a level greater than 5 mg/l (see above).
3. Install the cap and dry the outside of the cuvette if wet.
4. Turn on the analyzer by pressing the POWER key.
5. Press the MODE key until "Cl" appears on the display.
6. Place the cuvette in the analyzer and align the arrows,
7. Press the ZERO/TEST key.
NOTE
Do not use DPD No. 3 tablets for free chlorine measurement. The Chlorine Analyzer kit
comes with a box of both DPD No. 1 and No. 3 tablets. Using the DPD No. 3 tablets will
give inaccurate readings.
8. Remove the cuvette, remove the cap and add one tablet marked DPD No. 1. Crush and stir with
the mixing rod. Be sure it is completely dissolved.
9. Install the cap and dry the outside of the cuvette if wet.
10. Place the cuvette in the analyzer and align the arrows,
11. Press the ZERO/TEST key.
12. The "Cl" symbol flashes for about 3 seconds and then the result is displayed as mg/l free chlorine.
13. An error message may be displayed.
a. EOI: The lens is dirty. Clean with a soft cloth.
b. +Err: The free chlorine level exceeds 6 mg/l (if not diluted) or 12 mg/l (if diluted)
c. Err: The free chlorine level is less than 0.05 mg/l
14. When complete, rinse the cuvette with product water, dry and return to the case.
ANALYZER
TABLETS
MIXING ROD
CUVETTE
Figure 4. MC-TWPS Chlorine Analyzer.
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