Curtis ENABLE 40 - Manual (Page 61)

Curtis enAble ® 40-Series Manual, Rev. B A-3
formula:
Charge Factor = 10 * (Battery amp-hrs / Charger amps).
5.d Starting with the dead battery from Step 4, plug in the charger. After
10 minutes of charging, measure the battery voltage with a meter. Set
the Start Charge Voltage parameter to this value.
5.e The Charge Factor is basically a charge timer. A setting of 10 = 1 hour.
Using the Charge Factor setting, calculate the time it should take to reach
50% charge (50% time = Charge Factor / 20). After the calculated 50%
time, stop the charger and turn on the enAble 40 system. Plug in the
1311 and read the BDI% off the Monitor menu.
5.f Using the BDI% displayed on the 1311, adjust the Charge Factor using
this formula:
New Charge Factor = Original Charge Factor * BDI reading * 2,
with the BDI% being expressed decimally (e.g., 40% = 0.40).
If the BDI reading was too low, the new Charge Factor will be reduced
and thus speed up the charge calculation. If the BDI reading was too
high, the charge calculation is too fast and the Charge Factor will be
increased by this formula.
Step 6. Setting the Partial Charge Min
When charging with an offboard charger, the powerbase will continuously
monitor the charge cycle, even if the handcontrol is turned off with the On/Off
button.
However, when charging with an onboard charger, the system does not
power up and therefore the system cannot monitor the battery voltage during
charging. When the user powers up the system to check the charge, the BDI%
is estimated at that point.
In either case, when the user unplugs the charger and powers on the system,
the estimated BDI% is compared to the previous BDI reading and the Partial
Charge Min setting, and the new BDI value is calculated accordingly. Because
a battery can naturally recover some voltage by simply resting, it is important
that the Partial Charge Min parameter be set carefully to provide a true indica-
tion of actual charging.
6.a Leave the system turned on with the 1311 plugged in. (If you are using
an offboard charger, you will have to unplug it.)
6.b Set the Partial Charge Min to 1% and record the BDI% displayed in
the Monitor menu. Turn the system off and unplug the 1311.
6.c Wait 2 to 3 hours, and then turn the system back on. Plug in the 1311,
and record the new BDI% displayed in the Monitor menu. During
the wait period, the battery chemistry has equalized, causing the bat-
tery voltage to rise. When the system was turned on after the wait, the
BDI algorithm used the Empty Voltage and Full Voltage parameters to
APPENDIX A: BDI SETUP