LSI GS Series Operation and installation manual

English
GS820 Display
& GS Series Sensors
INSTALLER AND USER’S MANUAL
GM820_ENG_rev20130808 www.loadsystems.com
WIRELESS TECHNOLOGY & CRANE INSTRUMENTATION
DIVISIONS
WARNING! The GS820 system is designed as an operator aid and is in no way a
substitute for safe operating practice.
!
WARNING! Carefully read and understand this manual before proceeding.
!

2 The GS820 System2 The GS820 System
Read and understand the following:
For your safety and that of the people that come
into contact with LSI products, understand the
signicance of the instructions included in this
guide, respect all laws and regulations and comply
with applicable standards.
Pay particular attention to items bearing the alert
symbol !and the following words:
Warning: this denotes an instruction that if not
complied with may lead to serious injury or death.
Caution: this denotes an instruction that if not
complied with may lead to product failure or
property damage.
Important: this denotes an instruction that if not
complied with may lead to product performance
issues.
WARNING!
!
IMPORTANT!
!
CAUTION!
!
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BEFORE PROCEEDING
WARNING! Installation must be made
in compliance with LSI instructions and
using LSI supplied components only. Failure
to install all parts, or replacing parts or
components with parts or components not
supplied by LSI, may lead to system failure,
serious injury or death.
!
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OPERATION 3TABLE OF CONTENTS 3
1. INTRODUCTION ................................5
1.1 OVERVIEW ........................................ 5
1.2 START-UP ......................................... 5
2. INSTALLATION ..................................6
2.1 DISPLAY GS820 ................................ 6
2.1a Mounting Bracket ....................................6
2.1b Antenna Position .....................................7
2.1c Power Supply and Lockout Connection....7
2.1d Lockout Settings .....................................8
2.1e Password Settings ..................................9
2.2 LOAD CELL..................................... 10
2.3 ANGLE SENSORS .......................... 11
2.3a Mounting Procedure ..............................11
2.3b Angle Calibration Procedure No. 1:
Mechanical Set-Up.................................11
2.3c Angle Calibration Procedure No. 2: Correct
with the GS820......................................12
2.4 ANTI-TWO-BLOCK SWITCH.......... 12
2.4a Switch Bracket Installation LB011.................... 13
2.4b GS050 Installation .................................13
2.4c GS075B Installation...............................14
2.4d Chain Length Adjustment.......................14
2.5 LENGTH SENSOR CABLE REEL ..... 15
2.5a Maximum Boom Extension.....................15
2.5b Mounting the Cable Reel .......................15
2.5c Boom Length Calibration Procedure No. 1:
Mechanical Set-Up.................................16
2.5d Boom Length Calibration Procedure No. 2:
Correct with the GS820..........................16
2.6 RADIUS ........................................... 17
2.6a Radius Verification and Adjustment .........17
2.6b Radius Settings.....................................18
2.6c Basic Radius Parameters for a Lattice
Crane ...................................................19
2.6d Basic Radius Parameters for a Telescopic
Boom Crane ..........................................19
2.6e Advanced Radius and Height Parameters .20
2.6f Radius Parameters for a Lattice Crane with
Mast......................................................21
2.7 WIRELESS WIND SPEED SENSOR
GS020 ............................................. 22
2.8 WIRELESS LOAD PINS .................. 23
2.8a LP011, LP015, and LP026 ....................23
2.8b Load Pin Transmitter GS001 ..................23
2.9 LINE RIDING TENSIOMETER......... 24
2.9a Line Riding Tensiometer Installation.........24
2.9b Line Riding Tensiometer Installation on a
Swing Arm .............................................25
2.10 LOAD PINS, LINE RIDING
TENSIOMETERS AND
COMPRESSION CELLS:
CALIBRATION................................. 26
2.11 FOUR POINT LIFT........................ 27
2.11a Sum Load Indication............................ 27
2.11b Imbalance...........................................27
2.11c Slack Rope .........................................28
2.12 LIST AND TRIM ANGLE SENSOR29
2.12a Programming the GS820 for List and Trim
Indication ...............................................29
2.12b Mounting Instructions ..........................29
2.12c List and Trim Angle Calibration Procedure . 30
2.13 ROPE PAYOUT............................. 31
2.13a Rope Payout Calibration Procedure No. 1:
Mechanical Set-Up.................................31
2.13b Rope Payout Calibration Procedure No. 2:
Correct with the GS820..........................31
2.13c Rope Payout Limits..............................32
2.14 SLEW SENSOR INSTALLATION .. 33
2.14a Encoder Gear Verification..................... 33
2.14b Slew Encoder Location........................33
2.14c Slew Encoder Orientation ....................33
2.14d Slew Encoder Installation .....................33
2.14e Slew Transmitter Location .................... 34
2.14f Slew Transmitter Installation...................34
2.14g Cable Length Adjustment ....................34
2.15 SLEW SENSOR CALIBRATION .. 34
2.16 DATA LOGGER............................. 35
2.16a Recording Modes................................35
2.16b Date and Time ....................................35
2.17 SENSOR LIST .............................. 36
2.17a How to Add a Sensor to the GS820......36
2.17b How to Remove a Sensor from the
GS820 ..................................................36
2.18 NETWORK OPTIONS................... 36
2.18a Listen to Sensor Only ..........................36
2.18b Remote Monitoring.............................. 37
2.18c Repeater.............................................37
2.18d Wireless Sensor Update......................38
3. OPERATION.....................................39
3.1 DISPLAY GS820.............................. 39
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TABLE OF CONTENTS
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4 The GS820 System
3.2 USB PORT ...................................... 39
3.3 KEYPAD .......................................... 39
3.4 DISPLAY LIGHTS............................ 39
3.5 MENU SYSTEM .............................. 40
3.5a Menu Numbers .....................................40
3.5b Menu Navigation ...................................40
3.5c Password Protection ............................. 40
3.5d Menu Layout.........................................40
3.5e Parts of Line..........................................41
3.6 RATED CAPACITY INDICATORS....... 41
3.6a Display Programming.............................41
3.6b Crane Rigging .......................................41
3.6c Chart Wizard ........................................41
3.7 DISPLAY SETTINGS ....................... 42
3.7a Units.....................................................42
3.7b Backlight Mode .....................................42
3.7c Wind speed units ..................................42
3.7d Rounding.............................................. 42
3.8 SYSTEM DIAGNOSTIC................... 42
3.8a System Sensors Diagnostic ...................42
3.8b Radio Network Diagnostic......................43
3.8c Lockout Diagnostic................................43
3.8d Display Diagnostic................................. 43
3.8e Digital Input Diagnostic...........................43
3.8f Current Alarms .......................................43
3.9 SYSTEM LIMITS ............................. 44
3.10 TARE............................................. 44
3.11 INFORMATION ............................. 44
3.12 MAST SETTINGS ......................... 46
3.13 WORK AREA MANAGEMENT .... 46
3.13a Fixed Limits .........................................46
3.13b Dynamic Limits....................................47
3.13c Virtual Wall ..........................................48
3.13d Limit Warning, Alarm and Lockout .......48
3.13e Chart Area Management...................... 48
3.13f How to Delete Work Area Limits ............48
4. USB TOOL .......................................49
4.1 DATA LOGGER TRANSFER FROM
DISPLAY.......................................... 49
4.1a Transfer From Display to USB.................49
4.1b Transfer From USB Device to PC ............... 49
4.1c Troubleshooting..................................... 49
4.2 UPLOAD CAPACITY CHARTS........ 50
4.3 DATA LOGGER VIEWER ................ 50
4.3a Installation on a PC................................ 50
4.3b Quick Start............................................50
4.3c Full Report ............................................50
4.3d Wind Report .........................................51
5. MAINTENANCE ...............................52
5.1 SENSORS ....................................... 52
5.1a Replacing Sensor Battery .............................. 52
5.2 ANTI-TWO-BLOCK SWITCH.......... 53
5.2a Replacing the GS050 Batteries .............. 53
5.2b Replacing the GS075B Battery .............. 53
5.3 REPLACING A SENSOR ANTENNA54
5.4 LOAD CELLS .................................. 55
5.4a Reading Accuracy .................................55
5.4b Load Testing .........................................55
5.4c Care .....................................................55
6. TROUBLESHOOTING......................56
7. CERTIFICATION NOTES .................57
7.1 IMPORTANT NOTES FOR
HAZARDOUS AREA CERTIFIED
COMPONENTS............................... 57
7.1a Specifications........................................57
7.1b Ensuring Safe Operation in Hazardous
Areas.....................................................57
7.1c Product Repair And Servicing ................57
7.2 EQUIPMENT MARKINGS ............... 57
7.3 CLASS 1 DIVISION 1 AND DIVISION
2 CERTIFICATIONS ........................ 58
7.4 ATEX CERTIFICATIONS.................. 59
7.5 FCC AND IC – INSTRUCTIONS TO
THE USER....................................... 59
7.6 EMI / EMC....................................... 60
7.7 ENVIRONMENTAL CONDITIONS... 60
7.8 CE.................................................... 61
7.8a Declaration of Conformity.......................61
7.8b CE Safety .............................................61
8. GS820 MENU OUTLINE..................62
9. LSI PRODUCT LIMITED WARRANTY -
APRIL 1ST, 2013 .............................64
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INTRODUCTION 5
1.1 Overview
The GS820 system includes the cabin mounted
GS820 radio display and compatible crane
mounted sensors. The GS820 creates a two-way
radio network with the sensors to bring required
lift data to the operator. Hoist load, boom and jib
angles, boom length, wind speed and pending
two-block can be detected and then indicated
to the operator in real time. Working load radius
can be calculated and compared to a rated
capacity chart (if programmed). Furthermore the
GS820 can be programmed to generate warnings,
alarms and lockout commands, all triggered by
adjustable thresholds and limits. All these events
can be recorded by the data logger with a time
and date stamp. The exact operational function
of the GS820 system depends on the sensor
conguration used and the rated capacity charts
programmed (where applicable). The GS820
includes a USB port to facilitate software and
chart updates and data logger downloads using a
USB mass storage device (USB key).
1.2 Start-Up
The GS820 must be correctly programmed for the
system sensors installed. Once a reliable radio
communication network is established, the display
lights will remain lit without ashing. If a sensor
is missing or has a problem, a message will be
displayed on the LCD (liquid crystal display).
This process may take up to one minute. The delay
is created by the battery management function.
Press Bypass/Exit to temporarily bypass crane
function lockout caused by a missing sensor. If
rigging requires a crane conguration outside
of the limits dened by the rated capacity chart
selected, out of chart alarms can be avoided by
placing the display in “rig mode”. If the rig mode
is enabled in the display, press Bypass/Exit for
10 seconds to activate it. If the rig mode is not
available, contact your LSI representative or LSI
technical support representative.
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1. INTRODUCTION
GS050 Anti-Two-
Block Switch
GS101 Angle and
Length Sensor
GS820 Display
GC Series
Load Cell
GS075B All-In-One
Anti-Two-Block
Switch and weight
Figure: Key components in a typical system installation. Your product may vary. Not to scale.
WARNING! The GS820 system is designed as
an operator aid and is in no way a substitute
for safe operating practice.
W
!
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6 The GS820 System
2.1 Display GS820
2.1a Mounting Bracket
1. Determine the mounting location; the display
may be installed either inside or outside the cab.
It can be mounted on the dash, on a sidewall,
or on the ceiling of the cab. To ensure reliable
radio communication between sensors
and the GS820, the antenna should not be
in contact with metal and should have a
direct and clear line of sight to the sensor
antenna. The mounting bracket requires a at
surface of at least 2.5 inches in diameter on
both sides and where the back of the surface
is accessible in order to tighten the nuts.
2. Drill 1/4-inch boltholes through the mounting
surface with a 1/4-inch bit following either the
two, three, or the four holes conguration.
3. Install the display with bolts. Add washers and
lock nut behind the mounting surface and tighten
sufciently (bolts, nuts and washers not included).
4. Loosen the wing nut of the bracket arm to
adjust display orientation to facilitate viewing
by the operator and then tighten it back up.
2. INSTALLATION
Cab mounting
surface
Wing
Nut
Figure: Install the display and adjust orientation
10.73
8.75
7.37
7.23
2.44
2.25
Adjustable
Ram-Bracket
with dual ball joints.
Part number:
LB002B
Rugged
aluminium
enclosure
Two way radio
system
Waterproof
design
Field replaceable
antenna
Part number: TA008
5.74
Figure: Display GS820
Figure: Display dimensions (inches). Not to scale.
Figure: Display mounting bracket footprint. Not to scale.
0.750 0.750
0.906
ø0.218
ø2.5 in. min.
flat surface
120° TYP
0.594
0.594
IMPORTANT! Do not crack or puncture
the membrane fascia. The GS820 display is
splash and rain proof. Waterproong depends in
part on the integrity of the membrane.
IMPORTANT! Do not power wash the
display. The GS820 display is not designed to
withstand high-pressure washing devices that
can erode the membrane fascia seal or create
ssures in the membrane fascia. Power washing
the display voids warranty coverage.
!
Note: If the nuts are on the outside of the cab, caulk
with silicone between the washers and the cab to
prevent water entry.
WARNING! Installation must be made
in compliance with LSI instructions and
using LSI supplied components only. Failure
to install all parts, or replacing parts or
components with parts or components not
supplied by LSI, may lead to system failure,
serious injury or death.
!
Note: Refer to the Operation section for detailed menu navigation instructions for all calibration procedures.
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INSTALLATION 7
2.1b Antenna Position
For optimal performance the antenna should be
positioned on its side such that it is parallel to
the sensor antennas (but not pointing directly to
or directly away from them).
1. Adjust the antenna position with the articulating
base.
2. The antenna should have 5 inches of clear
space all around it.
3. The antenna should have an unobstructed line of
sight to all sensor antennas at all boom angles.
The DC power should not exceed 30 VDC and the
AC should be negligible (<1VAC).
2.1c Power Supply and Lockout
Connection
1. Connect the black wire (ground) to the negative
terminal of the battery or the panel connection;
alternatively bolt the black wire to the body of
the machine with a 1/4-inch or 5/16-inch bolt.
The ground connection must be strong enough
to sustain 3 amperes.
2. Connect the red wire to a fused accessory
source, rated at least 3 amperes, that supplies
+12 or +24 volts when the machine is in use.
The GS820 will automatically detect the voltage
level and adjust itself.
Power Supply
or Battery
+12 V or +24 V
Black
wire
Red wire
White wire
Orange wire
Green wire
Blue wire
Lockout #1
Lockout #2
Lockout #3
Lockout #4
Yellow cable
To GS820 power supply
connector (Step 5)
Figure: Connection without lockout.
3. Lockout number 1 (if required): connect the
white wire to a Bosch relay coil terminal.
Connect the other coil terminal of the relay to
the ground. When operating properly the white
wire will energize at the battery positive level.
Current over 1 ampere on the white wire
triggers an auto re-settable fuse. Current ow
will resume several seconds after the short
circuit is eliminated.
4. Lockouts number 2, 3 and 4 (if required): these
wires function in the same way as the white
wire described in step 3 above. Each lockout
wire can be triggered by a different set of alarm
conditions; see the Lockout Settings sub
section of this manual.
n.c.
n.o.
co
Power Supply
or Battery
+12 V or +24 V
Black
wire
Red wire
White wire
Orange wire
Green wire
Blue wire
Lockout #1
Lockout #2
Lockout #3
Lockout #4
To valve coil if
normally open is
required
Yellow cable
To valve coil if
normally closed
is required
Bosch relay
Figure: Connection with white wire lockout and recommended
Bosch relay.
Troubleshooting: if no voltage is present on the
white wire remove the load connected to the lockout.
CAUTION! Overvoltage will void warranty.
Use this power supply verication procedure.
Check the power from the crane in the DC and AC
modes under the following conditions:
• Engine start-up
• Engine idling
• Engine revving up, during complete
process, not just when it is revved up
• Engine revving down, same process as
above
• Engine shut-down
!
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8 The GS820 System
5. Connect the yellow cable to the GS820. The
connector is waterproof and well rated for
external environments. Simply connect the
cable to the display and gently tighten the nut.
Do not put a kink in the yellow cable where
it enters the connector; any bend in the cable
at the base of the connector must not be so
severe as to break the internal connections
where the cable meets the connector. The
power cable requires about 4 1/2 in. behind
the display to protect the connector.
2.1d Lockout Settings
Warning, alarm and lockout control is programmed
in this menu. The GS820 can be programmed
to generate alarms and lockouts for almost all
programmed limits and two-block. Furthermore,
warnings are generated when approaching
programmed load limits and rated capacity (when
applicable).
Warning level. When gross load (regardless of
tare value) approaches the maximum limit for a
load sensor, an intermittent warning message is
generated on the LCD. The maximum limit for a
load sensor is the lower of; a) the operator set limit
(Limit Menu), and b) the working load limit (WLL) if
rated capacity charts are used. The proportion of
a limit that must be reached to trigger the overload
warning is the warning level. The default factory
setting for the warning level is 90%.
1. Go to menu 4L) LOCKOUT SETTINGS.
2. Enter the user password (using Back, Next, Up
and Down as described in Password settings
section) and press Enter.
3. Select 1) WARNING LEVEL and press Enter to
modify.
4. Use Up and Down to adjust the warning level
and press Enter to conrm any change.
3. Press Down to select 2) ALARM LEVEL or press
Exit to return to the operation display.
Alarm level. All programmed and rated capacity
limits and two-block will generate an audible
alarm when the alarm level is reached. Alarms will
generate an intermittent alarm message on the
LCD. The proportion of a limit that must be reached
to trigger an alarm is the alarm level. The default
factory setting for the alarm level is 100%.
1. In menu 4L), select 2) ALARM LEVEL and press
Enter to modify.
2. Use Up and Down to adjust the alarm level and
press Enter to conrm any change.
3. Press Down to select 3) LOCKOUT LEVEL or press
Exit to return to the operation display.
Lockout level. All programmed and rated capacity
limits and two-block can generate a lockout signal
when the lockout level is reached. By default the
lockout wires carry crane power supply voltage as
long as the display is in safe condition (to inverse
lockout polarity see menu 4L) 8) LOCKOUT RELAY
INVERTED). When a lockout level is reached voltage
is cut on all lockout wires linked to the lockout
condition (see menu 4L) 4) through 4L) 7)). The
proportion of a limit that must be reached to
trigger lockout is the lockout level. The default
factory setting for the lockout level is 105%.
1. In menu 4L), select 3) LOCKOUT LEVEL and press
Enter to modify.
2. Use Up and Down to adjust the lockout level
and press Enter to conrm any change.
3. Press Down to select 4) WHITE WIRE LOCKOUT
TRIGGER or press Exit to return to the operation
display.
Lockout triggers. Different events can be
programmed to cut voltage on the lockout wires of
the yellow cable. Each lockout wire can be linked to
a different combination of lockout conditions.
1. In menu 4L), select 4) WHITE WIRE LOCKOUT
TRIGGER and press Enter to modify.
2. Select which alarm conditions will trigger
lockout on the white wire (see tables below).
3. Add the lockout codes for the selected alarms
together to nd the lockout trigger number.
4. Use Up and Down to adjust the white wire
lockout trigger number and press Enter to
conrm any change.
5. Press Down to select the next wire trigger line
and repeat steps 1 through 5, or, press Exit to
return to the operation display.
Yellow cable
Black wire: Negative (ground)
Orange wire: Lockout #3
White wire: Lockout #1
Blue wire: Lockout #4
Red wire: Positive 12 or 24 volts
Green wire: Lockout #2
Figure: GS820 power supply connector
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INSTALLATION 9
Table: Default Triggers
Lockout Wire Default Trigger
White ............................4301
Green..............................34
Orange ..........................32767
Blue ................................0
Table: Lockout Codes
Condition Code
Maximum wind speed ..................1
Minimum angle .......................2
Maximum angle .......................4
Overload ............................8
Work area warning approach............16
Maximum radius .....................32
Maximum length .....................64
Two-block .........................128
Maximum wind gust..................256
Maximum rope payout................512
Slew Left Limit .....................1024
Slew Right Limit ....................2048
Maximum tip height .................4096
Maximum imbalance factor ...........8192
Table: Lockout Codes (Continued)
Condition Code
Minimum slack rope................16384
Minimum list angle.................32768
Maximum list angle ................65536
Minimum trim angle ...............131072
Maximum trim rope ...............262144
Minimum mast radius .............524288
Maximum mast radius ............1048576
Minimum load limit...............2097152
Slew Warning Left ...............4194304
SlewWarningRight ...............8388608
ChartValue ....................16777216
Chart Value Reversed ...........33554432
Table: Example No. 1
Maximum radius .....................32
Minimum angle ..................... +2
Default green wire trigger............ =34
Table: Example No. 2
Maximum wind speed ..................1
Maximum angle .......................4
Overload ............................8
Maximum length .....................64
Two-block .........................128
Maximum tip height ............... +4096
Default white wire trigger .......... =4301
Lockout relay inversion. By default the lockout
wires carry crane power supply voltage as long as
the display is in safe condition. When lockout is
triggered voltage is cut on the lockout wires linked
to the lockout condition.
Exceptionally the lockout relay can be inverted
so that lockout wires carry no voltage in safe
condition and carry crane power supply voltage
when in a triggered lockout condition. In this case
if the display fails, crane functions will not lockout.
1. In menu 4L), select 8) LOCKOUT RELAY INVERTED
and press Enter to modify.
2. Use Up and Down to switch between “YES” and
”NO” and press Enter to conrm any change.
3. Press Exit to return to the operation display.
2.1e Password Settings
Two levels of access are available: administrator
and user. The administrator password is required
to change the user password. In the event both
the administrator and the user passwords are
lost please call LSI technical support. Menus
accessible from the operation display can be
individually protected by the user password.
1. Go to menu 4) INSTALLATION and select 4H)
PASSWORD SETTINGS.
2. Enter the administrator password and press
Enter.
3. Select 1) ADMINISTRATOR PASSWORD and press
Enter to modify.
4. Use Up and Down to adjust the administrator
password. Press Enter to save any changes.
WARNING! Inverting lockout relays will
allow crane operation in the event the GS820
display fails. Operating a crane without a
functioning anti-two-block system and load
and angle indication is dangerous and may be
against the law.
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WARNING! A hard stop to crane rotation may
cause loss of stability, structural damage to the
machine, property damage, personal injury or
death. The slew warning triggers can be used to
engage a damping system to safely slow down
crane movement before slew limits are reached
within machine tolerances at expected duty cycle
speeds. In all cases the crane manufacturer’s
recommendations should be followed.
!
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10 The GS820 System
5. In menu 4H), select 2) USER PASSWORD and press
Enter to modify.
6. Use Up and Down to adjust the administrator
password. Press Enter to save any changes.
7. In menu 4H), select 3) TARE PROTECTED and
press Enter to modify.
8. Use Up and Down to switch between “YES” and
“NO” and press Enter to save any changes.
9. Repeat steps 7 and 8 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 conrmation: press
Enter to save before quitting or press Exit to
quit without saving.
2.2 Load Cell
1. Install load cell bushings as supplied by LSI.
Assembly of the load cell and adapter plates
must be congured to the pin size required
by the specic dead end or hook to which it
is to be attached. In all cases, the bushings
supplied by LSI must be used where possible
to adapt the holes in the load cell to the pins.
Bushings must be secured with the two allen
screws provided, one on each side of the load
cell.
2. As required, place a washer between adapter
plate and pin head or nut on each end of the
pin that links the adapter plates to the load
cell. Additional washers should be added
equally to each end of the pin as required to
inhibit excessive lateral movement of load cell
(maximum 1/8” total movement) and adapter
plates along the pin.
3. If the dead end or hook to be connected to
the adapter plates requires a larger opening,
washers may be placed between the load cell
and the adapter plates equally on both sides of
the load cell.
4. In all cases the washers must be placed
symmetrically such that the load cell is
centered on the pins to avoid uneven loading.
5. Secure the pins with the nuts and cotter pins
provided.
6. A qualied (lift supervisor or crane inspector)
person must verify every lift assembly before
rst use and periodically thereafter (one to
twelve months), including before any new,
difcult or otherwise different lift.
Crane dead
end
Plate kit for
loadlink
Loadcell
Wedge socket
to loaded cable
C/C
Figure: Typical load cell and adapter plate assembly installed.
WARNING! Capacity and safety factor for
load cells and adapter plate assemblies are
calculated for load along the intended axis of
load (vertical with the assembly hanging free);
side loading may cause load cell and adapter
plate assembly to fail, causing load to drop.
Lifts must be rigged such that the load cell
and adapter plate assembly hang free and not
be subjected to side loading.
!
IMPORTANT! The load cell antenna should
not be in contact with metal.
IMPORTANT! For optimal performance and
signal reception, the GS820 load cell antenna
should have a clear line of sight to the GS820
display.
IMPORTANT! The load cell antenna should
point to the left or to the right of the boom; it
should not point directly to, or away from, the
GS820 display.
!
CAUTION! The load cell must be centered
on the pins to avoid uneven loading on the
plate kit assembly.
C
!
SkyAzúl, Equipment Solutions www.skyazul.com 301-371-6126