ARRI WRC-1 - Manual (Page 141)

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By pressing the SET button, the currently adjusted T-stop
can be shown in the first display line. The display shows
full T-stops followed by the tenth of a T-stop.
Example: T-stop 2.8 plus half a T-stop is shown as 2.8_5.
The tenths of a T-stop are linearly divided between the
two full T-stop positions.
Note The following warnings may be displayed:
‘IRIS TBL’ – a valid iris table has not yet been
activated;
readings with ‘NO’ in the first display line
indicate that the selected function is currently
not available (example: ‘NO IRIS’ although the
iris control is activated on the WRC-1, the iris
motor has not yet been connected);
readings with ‘RANGE’ in the second display
line indicate that the adjustment range of a
parameter has been exceeded (example: the
selected speed is not available with this camera);
readings with ‘OFF’ in the first display line
indicate that this function is deactivated on the
camera (example: shutter angle of the 435 is
set manually = ‘OFF ANGLE’).
Correct parameters must be set before initating
the camera run!
The handwheel is without function in the main menu.
Press the RAMP button when the camera is running to
start the ramp. The camera can be started, by pressing
the RUN button on the WMU-1.
The ramp can be reversed, by pressing the RAMP button
again: the ramp then reverses its direction until it reaches
the start value again. For best results wait until the end of
the ramp.
Note: To check the image in the viewfinder, the iris can
be opened completely by pressing the OPEN button.
The iris remains open until the OPEN button is
released again. This does not alter the pro-
grammed settings. The OPEN button is without
function while the camera is running.
With most lenses, the T-stops before the end-stops
are not exact due to the tolerances involved. In
order to avoid incorrect exposure, the adjusted
iris range should not contain these values.
With the iris wide open a lens-related reduction
in brightness towards the edge of the image
may occur, looking like an incorrect exposure.
The exact values are dependent on the lens type
and must be determined with test shots.
Controlling the Camera Speed