East Penn Manufacturing Co. NB Module AVR125-33

1. Before removing cell, review Safety Precautions on pg. 2 of this manual. Contact East Penn Mfg. Company, Inc. with specific questions or concerns.

3. Confirm the lifting device is rated to handle the weight of one cell.

4. All tools used to remove the cell shall be insulated to avoid metal contact with battery posts.

5. Remove bolts from the retainer bar from the cell to be replaced.

6. Cells develop internal pressure. Relieving this pressure from the cell will make it easier to remove the cell from the sleeve assembly.

1. Conduct a visual inspection of each cell.

2. Record the battery string voltage.

4. Record the individual cell voltages. The accuracy of the DMM (Digital Multimeter) must be .05% (on dc scale) or better. The DMM must be calibrated to NIST traceable standards.

Because float readings are affected by discharge and recharges, these readings must be taken when batteries have been on continuous, uninterrupted float for at least one month. Cells should be within ± 0.05 volts of the average cell float voltage.

5. Record the ambient temperatures.

6. Record individual cell Ohmic readings.

7. Record all intercell, inter unit and terminal connection resistances. Micro-ohm readings should be taken during this inspection. If any reading differs by more than 20% from initial readings taken, retorque the connection.; Recheck the micro-ohm reading. If the reading remains high, clean the contact surface according to installation portion of this manual.

Per IEEE 1188 “Capacity testing is used to trend battery aging. The result of a capacity test is a calculation of the capacity of the battery. The calculated capacity is also used to determine if the battery requires replacement.”

Do not discharge the batteries beyond the specified final voltage. When discharging at higher rates, extra connectors may need to be added to prevent excessive voltage drop and/or excessive temperature rise. Consult “Connector Packages” chart (pg. 15) for current limits.

When performing capacity testing and recording data use IEEE 1188 instructions. Should it be determined that any individual battery(ies) or cell(s) need to be replaced, contact your nearest East Penn agent or East Penn Service Center.

Batteries, cabinets, racks, and modules should be cleaned with clear water or a mixture of baking soda and water or East Penn mfg. supplied battery cleaner (part # 00321). Use clean water to remove baking soda residue.

Never use solvents to clean the battery.