Pressurizing The Pedestal - Vinten Osprey Light Operator's Manual

Transition
Transition mode gradually applies the full pedestal pressure to the moving column
rate. To select TRANSITION mode, proceed as follows:
Fully extend the moving column (5).
Depress the control valve
tion and allow the lever to extend under the spring force.
WARNING! Place the control valve
Work
Work mode applies the full pedestal pressure to the moving column
To select WORK mode, proceed as follows:
Ensure the moving column
Depress the control valve
clockwise to a horizontal position, allowing the lever
The control valve
NOTE: The pressure gauge only displays full system pressure when the control valve
(26) is set to WORK.

Pressurizing the pedestal

The Osprey Light pedestal may be pressurized manually using the self-contained pump, Vinten
portable pump (Part No. 3357-3) or an external pressure source.
A correctly pressurized pedestal will balance its payload, allowing movement over the full on-shot
stroke of the moving column with minimum effort, and will maintain its position when the steering
ring is released. Balance can be adjusted by adding or removing trim weights
tray pockets (25), or venting some of the internal pressure.
Ascertain the payload to be fitted to the pedestal (payload = pan and tilt head, camera, trim
weights, lens and all ancillary equipment). Referring to the
load on the horizontal axis then strike a vertical line from the load figure to the balance line. At the
intersecting point, strike a horizontal line to the vertical axis and read off the required gas pressure.
The pedestal pressure must be reduced to a maximum of 3.5 bar (50 psi) before fitting the pan
and tilt head (refer to
NOTE: Reducing pedestal pressure below 3.5 bar (50 psi) may cause a pressure leak.
(26) against the spring force, rotate the lever to the vertical posi-
least 10-SECONDS when switching between PUMP and WORK
modes, to prevent the moving column
(5) is fully extended.
(26) against the spring force, and rotate the lever fully counter
(26) will remain in an extended position.
Fitting and balancing the load
(26) in the TRANSITION position for at
(5) rising rapidly.
(5) to balance the payload.
(26) to extend under the spring force.
Pressurization
on page 22 for more detail).
Back
(5) at a safe
(28) to the weight
Graph, mark the pay-
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