Section IV. OPERATION UNDER UNUSUAL CONDITIONS

TM5-6130-301-13&P

2-11. CHARGING NICKEL-IRON BATTERIES. The nickel-iron, or Edison cell is normally very prominently

marked as NOT being a common lead-acid battery. Prior to charging nickel-iron batteries, it is desirable to

determine their specific gravity. The Edison cell has a normal specific gravity ranging from 1.160 to 1.215. Any

value below 1.160 at 60° F means the electrolyte should be replaced with electrolyte (potassium hydroxide) of

the proper specific gravity. Once filled with new electrolyte, determine the actual voltage between Edison cell

terminals. Then choose a controlled station which can provide that voltage value PLUS at least 2.4 volts dc (3.6

volts dc max). Now, follow the instructions for charging batteries as given in paragraph 2-7 or 2-8.

2-12. EMERGENCY SHUT-DOWN. For minor, station emergencies, shut-down procedure is to turn off the

circuit breaker associated with the station. To shut the entire unit down, turn off the main power switch (19,

Figure 2-1). As a final emergency shut-down procedure, turn off the power source for the Battery Charging

Distribution Panel.

Section IV. OPERATION UNDER UNUSUAL CONDITIONS

2-13. OPERATION IN EXTREME COLD (BELOW 0°F ( -18 °C) ). Remove any ice or snow which may have

accumulated on the panel or wiring.

Do not bend or king wiring as it becomes brittle with extreme cold.

2-14. OPERATION UNDER RAINY OR HUMID CONDITIONS. Humid conditions can cause corrosion and

deterioration of electrical components. Keep electrical components and wiring clean and dry.

2-15. OPERATION IN SALT WATER AREAS. Wipe the Battery Charger Distribution Panel with a clean

cloth dampened with clean, fresh water at frequent intervals. Use care not to damage the electrical system with

water.