Whisper 100 Owners Manual
Document #0211 REV C
SOUTHWEST WINDPOWER
12/31/2005
Switch Settings (continued)
Switch 3 , Time Hysteresis (continued)
With Switch 3 set to “OFF” the Whisper will start and stop charging the batteries immediately at the voltage regulation
set points. It is not necessary to depress the Reset Switch after changing the switch setting.
Except in VERY special circumstances Southwest Windpower recommends Switch 3 remain in the “ON” posi-
tion.
Switch 4, Voltage Hysteresis, Default Setting “OFF”
With Switch 4 set to “OFF” the Whisper Controller will start and stop charging the batteries at the voltage regulation
set points established either through the Optional Display or by the printed circuit board potentiometer.
With Switch 4 set to “ON” the voltage regulation-on point ( the point battery charging stops) set using the potentiome-
ter will be increased by 1.0 volts for 12 volt system, 2.0 volts for 24 volt systems, 3.0 volts for 36 volts systems and 4.0
volts for 48 volt systems. The voltage regulation-off set point (the point battery charging resumes) is unaffected by set-
ting the switch to “ON”.
The Voltage Hysteresis Switch does not increase the regulation-on and off set points set using the Optional Display. In
other words it is not additive with the Optional Display set points. It is not necessary to depress the Reset Switch after
changing the switch setting.
Switch 5, Potentiometer Enable, Default Setting “OFF”
Switch 5 in the “ON” position enables reading the potentiometer voltage on the Optional Display in real time. The reso-
lution limits of the display are 0.2, 0.4 and 0.8 volts for 12, 24 and 48 volt systems respectively.
With the Switch set to “ON”, voltage regulation points may not be set using the Optional Display. They must set using
the potentiometer.
With the Switch set to “OFF” prevents changing the voltage regulation set point by the potentiometer. It is not neces-
sary to depress the Reset Switch after changing the switch setting.
Switch 6, Default Setting “OFF”
There is no function presently associated with this switch. It is recommended to leave the switch in the ”OFF” position.
Whisper Controller Reset Switch
Operation of the Whisper Controller is controlled by a microprocessor and software contained on the Whisper
Controller printed circuit board. A reset switch is provided as means to restart the microprocessor and operating control
software without needing to disconnect battery power.
To reset the microprocessor momentarily press the reset button. The location of the button is depicted on the previous
page. If it is necessary to depress the switch a second time allow approximately 15 seconds before depressing the switch
a second time.
Note that if custom voltage regulation on and off voltage regulation points are set using the optional display,
these settings will be lost when the reset switch is depressed and the Whisper Controller reverts to the potenti-
ometer voltage setting. The values are also lost if the battery is disconnected.
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