User's Manual Part 1

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ISTALLATIO

6. Fully retract the boom, and use Up and Down

to adjust the length value displayed to equal the

actual fully retracted boom length, and then

press Enter to confirm.

7. Fully extend the boom, and use Up and Down

to adjust the length value displayed to equal the

actual fully extended boom length, and then

press Enter to confirm.

8. Note the new trim and scale values.

9. Press Enter to send the new calibration to the

length sensor.

10.Press Exit to return to the operation display.

2.6

Radius

2.6a Radius Verification and

Adjustment

1. Verify the boom and luffing jib* angles, and the

boom length**, are indicated correctly.

2. Verify the correct rated capacity chart is

selected***.

3. Test № 1: measure the actual radius and

compare to the radius indicated. Repeat with

the boom at minimum angle, at 45 degrees, and

at maximum angle; repeat at minimum and

maximum boom length**. If radius indication is

not accurate then go to step 4.

4. Measure the basic radius parameters on the

crane.

5. Program the basic radius parameters in the

RADIUS SETTINGS menu.

6. Test № 2: measure the actual radius and

compare to the radius indicated. Repeat with the

boom at minimum angle, at 45 degrees, and at

maximum boom angle; repeat at minimum and

maximum boom length**. If radius indication is

not accurate then go to the next step.

7. If the crane is rigged with the main boom only,

then go directly to step 11.

8. If the crane is rigged with a rooster, jib, or other

extension then the advanced radius parameters

must be measured on the crane and then

programmed in the

RADIUS SETTINGS menu of the

display.

9. Test № 3: measure the actual radius and

compare to the radius indicated. Repeat with the

boom at minimum angle, at 45 degrees, and at

maximum boom angle; repeat at minimum and

maximum boom length**. If radius indication is

not accurate then go to the next step.

* When the hoist is rigged off of a luffing jib only

** Telescopic boom cranes only

*** Systems with rated capacity charts programmed

in the GS820 only

Figure: The boom length calibration wizard, confirm maximum

boom length.

Figure: The boom length calibration wizard, Trim and Scale

values.

Note: If the difference between the displayed

radius and actual radius remains constant at all

boom lengths and angles, then correct by adjusting

the slew offset. For example: if the radius displayed

is always 2.3 feet longer than the actual radius,

then subtract 2.3 from the slew offset.