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4.3.4.4 Batt Gauge Ramp Rate
Parameter Possible Values Default Rev HHP Lite Std Adv
Batt Gauge Ramp Up Rate
10 – 1600 s 120 s A -
Batt Gauge Ramp Down Rate
10 – 1600 s 90 s A -
These parameters help to smooth out changes in the battery voltage caused by short
temporary charging or a temporary heavy load.
Battery Gauge Ramp Up Rate is the minimum time it takes the Battery Gauge to go
from the minimum position to the maximum position. Do not set this longer than the
time it takes to fully charge the batteries.
Battery Gauge Ramp Down Rate is the minimum time it takes the Battery Gauge to go
from the maximum position to the minimum position.
4.3.4.5 Batt Gauge Threshold
Parameter Possible Values Default Rev HHP Lite Std Adv
Batt Gauge High Threshold 0.1 – 33.4 V 33.4 V A -
Batt Gauge Failing Threshold 0.1 – 6.6 V 0.1 V A -
If the batteries are being charged for only a short period of time, the battery voltage
will still rise as long as no large current is drawn from the batteries (for example: when
the DX system is switched on after charging). This can mislead the battery gauge into
thinking that the batteries are full, when in fact, they are not.
To make sure that the battery gauge does not show the wrong information, the
battery level information is saved when the DX System is turned off. When the System
is turned on again, the new level of the battery is compared to the old level. If the
new level is very different from the old level, the old level is displayed on the battery
gauge, unless the current battery level is higher than Batt Gauge Failing Threshold, or
lower than Batt Gauge High Threshold.
4.3.4.6 High Voltage parameters
Parameter Possible Values Default Rev HHP Lite Std Adv
High Voltage Warning No / Yes Yes A -
High Voltage Rollback No / Yes No A -
High Voltage Threshold 28 / 30 V 28 V A -
If High Voltage Warning has the value 'Yes', and the voltage of the batteries rises
above the value of High Voltage Threshold, the battery gauge will flash to warn the
user that the batteries are being overcharged.
High Voltage Rollback gradually decreases the maximum speed of the powerchair
when the battery voltage rises above 30 Volt. This is especially useful when the user is
driving downhill. See also section
2.2.4.3: High Voltage Rollback.
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