ESI-500
Pilot’s Guide
2-7
Operation
BATT CAL DUE IN XX DAYS
• The calibration procedure can take up to 8 hours to complete.
• To assure compliance with the temperature limits of the calibration,
if performing the calibration procedure on aircraft the factory
recommends, in regions with hot climates, performing the
procedure during the cooler months of the year and in regions with
cold climates, performing the procedure during the warmer months.
• The battery discharge occurring upon entering the calibration
procedure menu selection is considered part of the calibration
discharge.
The accuracy of the battery capacity meter may be degraded after
about a year of standby use or storage. The indicator alerts the
operator when a capacity calibration is required by displaying the
following message during startup for 90 seconds (The XX is the
remaining number of days until calibration is due):
This message continues to be displayed at each start up. On day zero
(0) the “CAL DUE” battery indicator (see below) is shown on the screen
during normal operation. The message and “CAL DUE” battery indicator
continue to be displayed until the calibration procedure is completed.
1. Take the following into consideration before performing the
battery calibration:
• The battery SOC must be > 90% before the calibration can be
accomplished. Refer to charging instructions in step 6.
• The ambient temperature of the indicator must remain between
+5°C and +40°C (+41°F and +104°F) for at least 2 hours.
• The battery must not have been in operation (charging or
discharging) for at least 2 hours.
2. Apply aircraft power to the indicator using the battery switches or
avionics master switch (as applicable) and allow the unit time to
transition to normal mode operation.
3. Remove aircraft power to the indicator so that battery backup is
now functioning.
4. If the amber battery icon labeled with ‘RTC’ is shown on
the display the Real Time Clock (RTC) must be set before
proceeding, otherwise the battery calibration will not work
correctly. Contact an L3 authorized dealer.
Summary of Contents for ESI-500
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