UNDER CARRIAGE 2250 SERVICE/MAINTENANCE MANUAL
8-6
Published 11-06-15, Control # 040-13
ROTATING BED LEVEL SENSOR
The rotating bed level sensor senses the crane's pitch and
yaw. It is calibrated at the factory but can be reset, if
necessary
See Figure 8-5
for the following procedures:
To reset (re-zero) the level sensor:
1. Mount the sensor to a horizontal mounting surface.
2. Remove the cover and apply power to the unit.
3. Ensure that both axes are within ±5° of true level. LED
023 will be lit whenever the level is within ±5° of true
level.
4. Press and hold switch SW1 for one (1) second and
release.
5. The new "permanent zero" is set and stored in non-
volatile memory.
6. Repeat steps 2 through 5 to reset to a different setting if
necessary.
7. Disconnect the power and replace the cover.
To re-calibrate the rotating bed level sensor:
The rotating bed level sensor senses the crane's pitch and
yaw. It is calibrated at the factory but can be re-calibrated, if
necessary, as follows:
1. Turn OFF / disconnect power to the unit.
2. Press and hold down switch SW1 while reapplying
power to the unit.
3. Continue to hold down SW1 for one (1) second and
release.
4. The new "permanent zero" is set and stored in non-
volatile memory.
FIGURE 8-5
Item Description
1Switch SW1
2LED 023
Decreasing
Output
Increasing
Output
Increasing
Output
Decreasing
Output
2
1
Pitch Axis
Roll Axis