SYSTEM OPERATION
Charger Voltage
These batteries are designed for continuous float
applications. When setting the float voltage on the
charger, the system should be set to float at the nominal
battery float voltage times the number of batteries.
The charger must be able to maintain the system
voltage within ±0.5% of the desired level at all times.
The desired float voltage varies with temperature
according to the table below.
The average battery operating temperature should not
exceed 95°F (35°C) and should never exceed 105°F
(40.5°C) for more than an eight-hour period.
Operating at temperatures greater than 77°F (25°C)
will reduce the operating life of the battery. If operating
temperatures are expected to be in excess of 95°F
(35°C), contact East Penn for recommendations.
Battery Voltage
Although the charger must maintain the system voltage
within ±0.5%, individual battery voltages may vary by
±0.30 volts of the average battery float voltage.
RECORD KEEPING
Voltages, Temperatures & Ohmic Readings
Record keeping is an important part of stationary battery
maintenance and warranty coverage. This information
will help in establishing a life history of the battery and
inform the user if and when corrective action needs to
be taken. (Refer to Appendix A, Battery aintenance
Report)
While it is acceptable to operate at temperatures less
than 77°F (25°C), it will require longer charging time to
become fully recharged. Also, the capacity will be less
at operating temperatures below 77°F (25°C).
After installation and when the batteries have been on
float charge for one week, the following data should be
recorded:
1. Battery string terminal voltage
2. Charger voltage
3. Individual battery float voltages
4. Individual battery ohmic readings
5. Ambient temperatures
RECORD KEEPING (con’t)
Voltages, Temp. & Ohmic Readings (con’t)
6. Terminal connections should be checked to verify that
the installer did torque all connections properly. icro-
ohm readings should be taken across every connection.
Refer to meter manufacturer’s instructions for proper
placement of probes. If any reading differs by more than
20% from its initial installation value, re-torque the con-
nections. If the reading still remains high, clean contact
surfaces according to Step 2 under Battery Assembly.
MAINTENANCE
Always wear eye protection when working on or near
batteries. Keep sparks and open flames away from
batteries at all times.
Annual Inspection(1)
1. Conduct a visual inspection of the battery(ies).
2. Record the battery string voltage.
3. Record the charger voltage.
4. Record the individual battery voltages. The accuracy of
the D (Digital ultimeter) must be .05% (on dc scale)
or better. The D 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. Batteries should be within
± 0.30 volts of the average battery float voltage.
5. Record the ambient temperatures.
6. Record individual battery ohmic readings.
7. Record all interunit and terminal connection resistances.
icro-ohm readings should be taken during this
inspection. If any reading differs by more than 20%
from inital 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.
(1)
Other Maintenance Inspection intervals follow IEEE 1188.
Rectifier Ripple Voltage
Acceptable charging ripple (peak to peak) shall be less
than 0.5% of the manufacturer’s recommended string
float voltage or have a duration shorter than 8 millisec-
onds.
Battery Cleaning
Batteries, cabinets, racks, and modules should be
cleaned with clear water. If neutralizing is required,
use a mixture of baking soda and water. Use clear
water. Never use solvents to clean the battery.
Capacity Testing
Do not discharge the batteries beyond the specified final
voltage. When discharging at higher rates, extra connec-
tors may need to be added to prevent excessive voltage
drop. When performing capacity testing and recording
data use IEEE 1188 instructions. Should it be deter-
mined that any individual battery(ies) or cell(s) need
to be replaced, contact your nearest East Penn agent
or East Penn Service Center.
Per Battery Float Voltage ± .06 volts
Battery
Temperature AAllll UUnniiggyy ttyyppeess
eexxcceepptt
° F ° C 1122AAVVRR110000EETT
1122AAVVRR110000EETT
50° 10°
59° 15°
68° 20° 13.50 13.62
77° 25°
86° 30°
95° 35° 13.38 13.50
