ARRI WRC-1 - Manual (Page 38)

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First the end-stops of the lens must be calibrated and the
engraved T-stops must be assigned in the WRC-1 (as
described below) for each lens being used.
As the end-stops of the iris ring on the
ARRIMACROS change when the lens is focussed,
the ARRIMACROS may not be used with the
LCS or the WRC-1 system.
Before assigning the T-stop values and calibrating
the end-stops of the iris ring of the lens, check
all the motors you want to use to be firmly
attached to the support rods of the bridge plate.
5.5.1 Assigning the T-stops
The adjustable T-stops (1, 1.4, 2, 2.8, 4, 5.6, etc.) must be
correctly assigned in the WRC-1 to the various positions
engraved on the iris ring of the lens. The iris cannot be
remotely controlled until the respective positions have been
assigned. This assignment is stored in the WRC-1 in a
table (tbl).
• If a lens has not yet been selected and the T-stops have
not yet been assigned (condition on delivery from the
factory, or the active iris table has been deleted from
the memory), a flashing warning appears – ‘IRIS TBL’
– when the WRC-1 is switched on with the IRIS sliding
switch set to the position ‘ON’. Press the MODE button
once to enter the input mode.
• If a lens has already been selected and T-stops have
been assigned previously, the menu for programming
the T-stops of the iris is always the last submenu before
returning to the main menu in the WRC rotary switch
position ‘IRIS’.
Press the MODE button three times in the WRC rotary
switch position ‘IRIS’ and the COMPENSATION rotary
switch at ‘OFF’ until ‘TBL LOAD’ appears on the display.
Controlling the Iris