2-15. OPERATION OF AUXILIARY EQUIPMENT.
Generator sets must not be operated in enclosed area unless exhaust discharge is properly
vented to the outside. Be alert at all times during operation for odors and exposure symptoms to
recommended by medical/safety personnel, must be worn when working near set.
a Generator Set (ARMY). Instructions for operating the generator are contained in the applicable generator set
b Color Comparator Test Kit. Instructions to determine the pH values and chlorine residual in water are contained
part of the test kit, but are included in Storage Box No. 3.
c TDS Meter. The TDS (total dissolved solids) meter is a calibrated meter that measures how much electric
current can flow through a sample of water. Pure water passes almost no current.
(1) Description of the TDS meter: (a) Reads in ppm (parts per million) or in mg/l (milligrams per liter).
(b) Has three scales: 0 to 5x10, 0 to 5x100, and 0 to 5x1000.
(c) Change scales with the range switch.
FIGURE 2-75. TOTAL DISSOLVED SOLIDS (TDS) METER
Always start with meter set on the 0 to 5x1000 scale. If you use a lower scale first, you may damage
The TDS meter is factory calibrated and suitable for use when treating fresh (lake, stream, pond,
river) water. When treating seawater and brackish water, it is necessary to recalibrate the meter. If
your meter has both "442 and "NaCl" internal standards stamped on the bottom plate, obtain a
standard sodium chloride (NaCl) solution (ARMY-SC-4610-97-CL-E16; MC-SL-3-08580C) and refer to