National Crane Published 9-26-2018 Control # 646-02 7-17
NTC55 OPERATOR MANUAL RATED CAPACITY LIMITER
Boom Angle Calibration
Select 2 on the Main Sensor Calibration Menu screen to start
the boom angle calibration.
Level and set the truck on outriggers before starting the
boom angle calibrate procedure. The boom angle needs to
be measured accurately with an inclinometer to do an
accurate calibration.
Boom Angle Calibration
Select 2 from the Main Sensor Calibration Menu screen to
start the boom angle calibration.
Three calibration positions are shown one at a time starting
with the 0° position on the Boom Angle Calibration screen.
Once OK is pressed for the 0° position, the 40° is activated,
and then the 65° boom angle.
If the RCL system determines the sensor is not within the
established zero range, an error screen will appear. The
sensor will then have to be mechanically zeroed internal to
the length angle reel.
Boom Length Calibration
Select 3 from the Main Sensor Calibration Menu screen
(page 7-16) to start the boom length calibration.
Boom Length Calibration
Two calibration positions are shown one at a time starting
with the fully retracted position on the Boom Length
Calibration screen.
Once OK is pressed for fully retracted position the fully
extended position is activated and will appear.
Rod Side Pressure Sensor Calibration
Each transducer must be calibrated to the zero position
separately. To zero the rod side transducer, the base
transducer electrical cable must be disconnected.
Select 4 from the Main Sensor Calibration Menu screen
(page 7-16) to start the lift cylinder rod side pressure
calibration.
Rod Side Pressure Sensor Calibration
Confirm that you have disconnected the electrical cable (port
RCL 1) to base side transducer, and then follow the
instructions as they appear on the screen.
- Pressing OK sends a signal to the transducer to re-
program and power down.
NOTE: There is no need to bleed the pressure at each
transducer. Simply follow the instructions and
disconnect the appropriate electrical cables as
indicated
- When prompted by the bottom paragraph,
reconnect the base sensor to manifold and press
OK to return to the Main Sensor Calibration Menu
screen (page 7-16).
Base Side Pressure Sensor Calibration
Select 5 from the Main Sensor Calibration Screen
(page 7-16) to start the lift cylinder base side pressure
sensor calibration.
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