JLG 800A_AJ Service Manual - Manual (Page 268)

SECTION 4 - BOOM & PLATFORM
4-54 – JLG Lift – 3120858
IT IS NOT NECESSARY TO CALIBRATE THE TILT SENSOR IN THE
GROUND CONTROL MODULE AT THIS TIME. HOWEVER, WHEN
THE TILT SENSOR IN THE GROUND CONTROL MODULE IS RECAL-
IBRATED, THE UPRIGHT MONITORING SYSTEM TILT SENSOR
MUST BE RECALIBRATED AS WELL.
d. After selecting "UMS SENSOR", the following
screen will appear:
NOTE: By pressing the left or right arrow keys in this screen,
you may view the output of the sensor.
e. Press "ENTER" and the next screen will
display the following, asking if the machine is on
a level surface:
THE MACHINE MUST BE LEVEL FOR PROPER CALIBRATION.
f. Verify the machine is level and press
"ENTER" . The screen will display the fol-
lowing, asking you to fully elevate the main
boom: