Laversab 6300 User Manual page 10

6300 Rev H User's Manual
[5] Battery On/Off switch:
This switch is installed only if an internal battery is included. This switch connects (or disconnects) the
internal battery from other circuits within the 6300. If AC power is not available, turning this switch On
allows the unit to operate on internal-battery power.
In situations where AC power may be intermittent, it is advisable to keep the Battery On/Off switch in the
On position. This will allow the internal circuits to automatically switch to battery power when AC power is
lost.
Caution: When the unit is not being used, the Battery On/Off switch must be in the Off position.
Leaving this switch On will drain the battery since some internal circuits will be active when this switch
is On.
[6] Remote Unit connection:
Using the 30-foot remote cable, connect the Remote unit to the Main unit through this 10-pin circular
connector. It is recommended that this connection be made prior to applying power to the 6300. If this cable
is disconnected, the 6300 stops operating.
[7] Emergency Vent Valve, "Pitot Cross-bleed" :
In the event that the 6300 is in-operable due to a malfunction or due to loss of power, it is possible to vent the
Pitot system manually. This is done using the metering valve labeled "Cross-bleed". This valve is a positive
shut-off valve. Opening this valve slowly will equalize the pressure between the Pitot and Static systems
(causing airspeed to be at zero).
Since opening this valve transfers pressure from the Pitot system into the Static system of the aircraft, while
opening this valve, care must be taken to vent the Static system simultaneously (if necessary), to prevent the
altimeter in the aircraft from going below minus-1000 feet. Also, care must be taken not to exceed the
maximum value of the Climb indicator in the aircraft.
Once airspeed is down to zero, this valve must be opened completely, to ensure that airspeed stays at zero
while the Static system is vented to ambient (using the Static vent valve).
Caution: This valve is for emergency use only and should not be used during normal operation. When
emergency venting is completed, this valve should be closed immediately.
125-9106A Page 10