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MAINTENANCE
CHANGING PROBE AND CALIBRATION
In case of probe is malfunctioned  and need to be replaced with a new one, follow 
below procedure to calibrate the probe to reach it’s fully performance.
To change the probe:
•  Turn off the system.
•  Screw loose the sealing nut, remove the malfunctioned probe from system.
•  Connect the new probe , insure the indication point on both connector is 
matched, screw tight the sealing nut.
To calibrate:
•  Turn off the system
•  Press and hold both 
 and 
 simultaneously to enter factory mode.
•  Select <Calibration>, press 
 .
-The calibration consists of two steps: bright scene calibration and dark  
scene calibration.
1.  Brightscene:aiming the camera to a bright scene until whole screen is 
pure white.  Press 
 when ready. Holding still while calibrating. You 
may lock the exposure value of a rather darker scene by press 
 , 
this will help finding a bright scene.
2.  Darkscene:aiming the camera to a dark scene until whole screen is 
pure black. Press 
 when ready. Holding still while calibrating. You 
may lock the exposure value of a rather bright scene by press 
 , this 
will help finding a dark scene.
•  When the calibration is done, restart the system.
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