24 The GS550 System
6. Repeat step 4 to adjust password protection for each menu as required. Press Enter at any
time to save changes made. Press Exit at any time to return to menu 4) Installation. If there are
any unsaved changes the display will request confirmation: press Enter to save before quitting
or press Exit to quit without saving.
2.5.7 Angle Calibration Procedure № 1: Mechanical Set-Up
1. Level the boom such that it is perfectly horizontal; use a high quality bubble or digital angle
sensor. If the GS550 display indicates 0.0 degree then angle calibration is complete; if not then
continue to step 2.
2. For GS011 angle/length sensors only: Carefully remove the cover of the LS101 cable reel.
3. Loosen the mounting screw in the slotted hole of the angle sensor mounting plate.
4. Pivot the angle sensor slightly until angle indication is correct.
Tip
When the angle sensor is moved very slowly, it may take several seconds to see an update
at the GS550 display. Instead move the sensor up a couple of degrees, and then bring it
back down to where it should be. The small light on the angle sensor flashes when it
transmits a new value to the display.
2.5.8 Angle Calibration Procedure № 2: Correct with the GS550
Calibrate angle indication by adjusting the trim (offset) value in the GS550 display (see Figure 10);
the GS550 will then communicate the updated trim value to the sensor.
1. Position the boom at a precisely known angle.
2. Press Menu and then Next three times to go to 4) Installation.
3. Press Enter and Next to go to 4B) Sensor Calibration.
4. Press Enter to go to the password page.
5. Use Back, Next, Up and Down to enter the user password.
6. Pess Enter and Next to go to 4B2) Manual parameter calibration.
7. Press Enter to go to page 4B2A)
8. Use Back and Next to select the angle sensor to be calibrated.
9. Press Enter and Next to go to the trim adjustment page.
10. Use Up and Down to adjust the trim value.
Example: If angle indicated is 0.3° over the actual angle, adjust the trim value to -0.3.
Example: If angle indicated is 0.9° below the actual angle, adjust the trim value to 0.9.
11. Press Enter to save changes.
12. Press Exit four times to return to the operation display.
13. Verify accurate angle indication at both very high and very low angles.
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