Technical Manual: TM50567
Optica 30/40/50 series
Revision: 4.0
Date of release: 2019-01-23
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www.vareximaging.com
Service screen 1
Calibration of cross shutters
Calibration of the cross shutters is done on the
Cross Shutters Calibration Screen
.
Warning:
Not completing all indicated calibration steps will leave the collimator un-
calibrated.
Warning:
Loss of electrical power will leave the collimator un-calibrated.
Steps to calibrate cross shutters:
1.
Measure and position the collimator at an SID between 90 cm and 180 cm.
2.
Set the SID on the touch screen to the measured value (see applicable
User Manual
for more
details on SID selection).
3.
Enter
Service screen 1
, select button
and confirm calibration to enter the
Cross
Shutters Calibration Screen
.
4.
Cross calibration to minimal size (closed position):
a.
Open the long shutters a little by turning the control knob.
b.
Carefully close the cross shutters completely with the control knobs. Verify this by the
field light: when completely closed, the field light should not be visible on the table.
c.
When the cross shutters are completely closed, select the button
in the
Cross Shutters Calibration Screen
. The collimator will perform the cross zero
calibration. Wait until the shutters are stopped moving before continuing with the next
step.
5.
Cross calibration to the maximum calibration size (open position):
a.
Open the long shutters a little by turning the control knob.
b.
Adjust the field size to an actual measured value of 43 cm for the cross shutters with
the control knob. Verify this by the field light.
c.
When the cross shutters are at 43 cm, select the button
in the
Cross
Shutters Calibration Screen
. The collimator will perform the cross max calibration.
Wait until the shutters are stopped moving before continuing with the next step.
6.
Complete cross shutters calibration by selecting button:
