Curtis ENABLE 40 - Manual (Page 60)

A-2 Curtis enAble ® 40-Series Manual, Rev. B
Step 3. Setting the Empty Voltage
3.a Normally a value of 1.7 volts per cell is used as the empty point. This
corresponds to a setting of 20.4 V. For some sealed batteries, this may
be too low. Consult the battery manufacturer if you are unsure.
Step 4. Setting the Discharge Factor
4.a Resume driving the chair in a normal cycle.
4.b Pay attention to the battery voltage, BDI, and time.
4.c At some point, you will feel the chair become sluggish and notice the
battery voltage drop significantly with basic maneuvers. This is the fully
discharged point of the battery. Stop driving.
4.d The BDI should have indicated 0% before this point, to prevent the
battery pack from wearing out prematurely.
4.e If the BDI does not read 0%, reduce the Discharge Factor parameter
proportionately to the indicated remaining BDI. Use this formula to
determine the new setting:
New Discharge Factor = Present Discharge Factor * (1 – BDI%),
with the BDI% being expressed decimally (e.g., 90% = 0.90).
4.f If the BDI did go to 0%, increase the Discharge Factor parameter by
the time it took to reach 0% prematurely. Use this formula to determine
the new setting:
New Discharge Factor = Present Discharge Factor * (time it took to
drain the battery / time it took to get 0% BDI indication).
Step 5. Setting the Charge Factor and Start Charge Voltage
How you set the Charge Factor and Start Charge Voltage parameters depends
on how you want the BDI gauge to respond to partial charging. The tradi-
tional method is to require a full recharge and not to reset the BDI gauge until
the battery is full. The enAble 40 can also be set to allow the user to stop the
charge in mid-cycle and display a proportional amount of charge, or “partial
charge” reading.
If you want to require a full charge to reset the BDI gauge:
5.a Set the Charge Factor to 100.
5.b Set the Start Charge Voltage equal to the Reset Voltage.
With these settings, the BDI will not recalculate until the very end of the
charge cycle, and the Reset Voltage — not the charge time — will trigger the
BDI to 100%.
If you want to use the partial charge feature:
5.c Based on the Amp Hour rating of the batteries and the charger’s aver-
age amp output, initially calculate and set the Charge Factor using this
APPENDIX A: BDI SETUP