ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
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OPERATOR INSTRUCTIONS
MAINTAINING NORMAL OPERATION UNDER USUAL CONDITIONS
PRODUCT DISTRIBUTION
Complete the chlorine and TDS measurement checks described under WATER QUALITY
MEASUREMENT before distributing product water after initial startup. To distribute water, start the
Distribution Pump P-7 and use the distribution hoses and nozzles to dispense the water. The water level
in the tanks must be at least 12 inches above the outlet to deliver the full flow rate through the nozzles.
For the A-TWPS, fill the standard 6000-gallon distribution system at least half full before beginning to fill
the 9000-gallon system. If supply demands allow, wait until the 6000-gallon system is full before filling
the 9000-gallon system.
MAKING ENTRIES IN THE OPERATING DATA LOG
Complete the data entries in the Operating Data Log once each hour. Refer to WP 0080.
WATER QUALITY MEASUREMENT
General
The raw feed water TDS, the product water TDS and the product water free chlorine level are measured
hourly and the results are entered into the Operating Data Log (WP 0080).
1. After measuring the raw feed water TDS, use the Feed Water TDS Set adjustment on the OCP to
set the Feed Water TDS display to the value measured for the raw feed water.
2. Open the instrument/solenoid panel and make sure the conductivity transmitter ON/OFF switch is
at the ON position (see Figure 1).
Figure 1. Instrument / Solenoid Panel.
3. Compare the measured product water TDS with the value displayed by the OCP.
a. If significantly different, calibrate the TWPS conductivity transmitter CT-501 during the
PMCS shutdown.
b. The % Salt Rejection based on the measured value can be estimated as follows:
100 (100 OCP %Salt Rejection) x (Measured TDS/OCP TDS)
4. If the mission requires low EMI emissions, move the conductivity transmitter ON/OFF switch on
the instrument/solenoid panel to the OFF position.
5. Compare the measured free chlorine level with the requirement established for the mission.
Adjust the hypochlorite pump if needed by changing the speed setting as follows:
CM = measured chlorine level
CR = required chlorine level
S1 = pump speed dial setting
S2 = new pump speed dial setting required
S2 = S1 x CR/CM
A-TWPS Water Quality Measurement
Water quality measurements are conducted using the WQAS-P. Refer to TM 10-6630-222-12&P.
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