Installation Guide

975-0691-01-01 Revision B 3-27
8. The default State-of-charge at startup is 75%. Before synchronizing the
Battery Monitor to a State-of-charge of 100%, charge the batteries
completely and allow the batteries to remain in float state for at least 2 hours.
Refer to “Synchronization” on page 3–36 for synchronization instructions.
Battery Sizing
The amp-hour setting on the Battery Monitor should be set to a value equal or
lower than the actual amp-hour capacity of the system’s battery bank. If a Battery
Monitor is installed on a battery bank that is not brand new, it is likely that the
batteries have aged and lost some Ah capacity. In this case, it is recommended
to set the Ah lower than the rating after conducting a capacity test or consulting
the battery manufacturer. Using a number that is lower than the actual amp-hour
capacity allows the Battery State-of-Charge meter to provide a more
conservative indication for the use of the batteries to avoid excessively
discharging them.
Also note the temperature at which the battery capacity is rated. The amp-hour
capacity of the batteries decreases at temperatures lower than the rated value.
The amp-hour rating is usually printed on the battery’s label. If the system
contains batteries in parallel, then the amp-hour rating of the parallel batteries is
added together (i.e., two 120 amp-hour rated batteries in parallel equals 240
amp-hours). The amp-hour capacity of a bank does not increase for series-wired
batteries and is equal to the lowest rated battery in the series string. If the amp-
hour capacity is not listed on the battery, consult the battery manufacturer or
dealer for assistance.
Changing Settings from the Front Panel
To change settings, press and hold the OK key for three seconds to enter Setup
Mode. Press the > key until the desired setup menu appears.
To enter a menu, press the OK key. The desired settings can then be selected by
pressing the < or > keys.
To alter a specific setting, press OK when the setting is highlighted. The value of
the setting can then be changed by pressing the < or > keys again. When the
desired value is set, press OK to select other settings which need to be changed.
When all settings are correctly configured, press and hold the OK key for three
seconds to save the settings and return to Display Mode.
Note: When no keys are pressed in Setup Mode for 90 seconds, the Battery
Monitor will automatically return to Display Mode without saving any changed
settings. Be sure to press and hold the OK key for three seconds to save all
settings.