Manual Equalize Timer; Maintenance; Normal Performance; Four Major Sections - HindlePower SCR series Operating Instructions Manual

5. ADJUSTMENTS OF FLOAT & EQUALIZING CHARGE (also see Section IV, 1)
a. Each adjustment is made by means of a potentiometer with a slotted shaft for a screwdriver. The
potentiometers are front-panel mounted and appropriately marked. A lock nut on each potentiometer is
provided and should be tightened after the proper adjustment is completed. This prevents any accidental
misadjustments of the settings. The voltage response may be slow if a rise in voltage adjustment is desired;
because the battery state of charger and connected load must be considered. Turning the shaft clockwise
will raise the voltage, and turning counter-clockwise will lower the voltage.
b. Since accuracy of measurement is important when setting float and equalizing voltages, a precision
portable voltohmmeter with as leas one-percent accuracy is recommended for these DC measurements. A
conventional voltohmmeter or analyzer such as the Simpson Model 260 is also satisfactory, but is not as
accurate.
c. Any setting of the float voltage or equalizing charger voltage should not be considered final until the
ammeter shows less than charger rated current, and voltage does not change after several hours of
operation.
6. MANUAL EQUALIZE TIMER (OPTIONAL)
a. This timer is provided to obtain a charge up to 72 hours, at a slightly higher value than the ordinary
float voltage. The timer may be used for recharging older batteries, or for a freshening charge on new
batteries. For a detailed explanation of operation see Section V (Customer Options).

7. MAINTENANCE

a. This charger is designed to require a minimum of maintenance. There are no rotating parts except in
the optional timer and all components have a nominally indefinite life with no expected aging effect. It
should be kept clean, dry and checked periodically to make sure all connections are tight. If necessary, dry
air may be used to blow dust out of the interior. In the event of any irregular operation, examine, and
tighten if necessary, all internal and external connections and check circuits for continuity (see schematic
diagram on page 28). If the difficulty cannot be remedied, contact the manufacturer.

8. NORMAL PERFORMANCE

a. Assuming that the charger has been operating in the float position, an indication of normal
performance can be obtained by setting the FLOAT/EQUALIZE switch in the equalize position (turn timer
off zero). Increased charge current will show on charger ammeter until the battery reaches the equalize
voltage. At this point the current should slowly decrease.
b. If the charger has been operating in the equalize voltage position, turn SW1 to FLOAT (turn the
timer manually to zero). The charger will indicate zero or little output current until the float voltage is
reached. At this point, the current should increase slowly to the system load value, (the battery is now
"floating" across the line with approximately equal input and output currents).
c. When operating normally, the current limit control will limit the maximum charger output current to
approximately 110 percent of the rated charge current. In case of a high DC current demand, the current
limit control will keep the charger output within safe values without tripping the DC circuit breaker or the
AC breaker.
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