Iris Adjustment - Samsung ST70 Service Manual

Adjustment

5-12 IRIS adjustment

■ Adjust the close time of the equipment shutter of each camera.
■ When using the multi-layer iris, there might be deviation in the aperture of each layer. Therefore, try to reduce the deviation of the
aperture of each layer by adjusting each aperture set.
<Adjustment method>
1. Prepare AE TESTER which is adjusted by
2. Install AE TESTER on camera.
* Brightness of the light box is
* The color temperature of the light box is 3200K.
3. Install microSD card with program files and then, turn the camera on.
TM
4. Adjustment is made automatically.
q
Set an ideal AV value for each iris layer.
w
Set the exposure time and the gain value and change the iris layer and measure the preview G value for each iris layer.
2 conditions is satisfied, if the preview G value for the big iris layer is bigger than that for the small one. If not, NG.
e
Determine if A V value calculated for each iris is within the iris adjustment range. If it is, Preview G value is satisfied. If not, NG.
r
-If the 2 conditions are satisfied, set the iris value to be actually used using the difference between the AV values of the iris
layers calculated.
t
Refer to EEPROM WRITE information to write the adjusted value on EEPROM.
Refer to CARD WRITE information to write the adjusted value on a data file.
y
5. Once the adjustment is completed, the camera is automatically off.
<Adjustment result>
Open a CSV file created on the adjustment memory card to check the result.
<Restriction>
If the capacity of CSV file is more than 30KB, clear all of the previous data and then, record
5-12
LV 12.
13 LV.
Light source box
Camera
Fig. 5-7
SAMSUNG