PG Drives Technology VR2 series, Operation And Installation Manual

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PG
DRIVES TECHNOLOGY
59
C
HAPTER
3 - P
ROGRAMMING
SK77898/2
5 Battery Parameters
5.1 Low Battery Flash Level
This parameter sets the point at which the VR2's TruCharge battery gauge starts to
flash slowly to warn of a low battery condition.
Adjustable between 1 and 10 in steps of 1.
This corresponds to the number of bars shown on the battery gauge.
For example, if this value is set to 2, then the flashing will occur when the gauge
drops to 2 bars.
5.2 Cable Resistance
This parameter should be set to the total value of the electrical resistance of wires
between the batteries and the VR2 body. This parameter ensures the TruCharge
battery gauge gives an accurate reading under all driving conditions.
Adjustable between 0 and 255m
W in steps of 1m W .
The value should take into account the electrical resistance in both the positive and
negative connections.
The battery wires in the VR2 cable have a typical electrical resistance of 4.6m
W /
metre. Therefore, if the VR2 has a 1.3m cable, the Cable Resistance setting must be
at least:
(1.3 x 4.6m
W ) x 2 = 12m W .
To this value you must also add the resistance of the wheelchair wiring between the
batteries and the VR2 connectors.
5.3 Calibration Factor
This allows further fine calibration of the TruCharge battery gauge.
This is normally set at the factory and should not need further adjustment.
5.4 Low Battery Alarm
This parameter sets whether the VR2 will give an audible alarm to signal a low battery
condition. The point at which the alarm will sound corresponds to the Low Battery
Flash Level setting. The parameter can be set to On or Off.
On Means an alarm will sound.
Off Means there will be no alarm.
5.5 Low Voltage Cut Out.
This allows programming of the level the voltage must reach for the period set by
Low Voltage Time before the control system ceases to operate.
It is programmable from 16V to 22V in steps of 0.5V.
5.6 Low Voltage Time
This allows programming of the length of time the voltage must be below the Low