HI LPB SERIES LOAD POINT ASSEMBLIES OPERATION AND INSTALLATION MANUAL Corporate Headquarters 9440 Carroll Park Dr., Ste 150 San Diego, CA 92121 Phone: (858) 278-2900 FAX: (858) 278-6700 Web-Site: http://www.hardysolutions.com Hardy Process Solutions Document Number: 0596-0238-01 Rev F Copyright 2011 Hardy Process Solutions, Inc. All Rights Reserved. Printed in the U.S.A.
Local Field Service Hardy has over 200 field technicians in the U.S., and more positioned throughout the world to assist you in your support needs. We also have factory engineers who will travel to your facility anywhere in the world to help you solve challenging applications.
CAUTION: UNPACK WITH CARE WHEN UNPACKING, DO NOT DISCARD THE PACKING CASE OR ANY PACKING MATERIAL, UNTIL THE CONTENTS OF THE PACKING CASE ARE INSPECTED AND CAREFULLY COMPARED WITH THE SHIPPING DOCUMENTS. IF ANYTHING IS UNSATISFACTORY, PLEASE NOTIFY HARDY PROCESS SOLUTIONS IMMEDIATELY BY CALLING, FAXING OR E-MAILING TO: Customer Support Department HARDY PROCESS SOLUTIONS, INC. 9440 Carroll Park Dr.
Table of Contents Table of Contents General Information - - - - - - - - - - - - - Three Load Point Types - - - - - - - - - - - Unpacking - - - - - - - - - - - - - - - - - - Installation of the Ground Strap - - - - - - - - Site Preparation - - - - - - - - - - - - - - - Precautions - - - - - - - - - - - - - - - - - Basic Engineering Principles for Positioning Load Point Assemblies - - - - - - Principle #1 - - - - - - - - - - - - - - - Principle #2 - - - - - - - - - - - - - - - Principle #3 - - - - - - - - -
HI HLPB SERIES LOAD POINT ASSEMBLY Electrical Termination Cable Color Codes Model Numbers - - - - - - - - - - - Three Leg Systems - - - - - - - - Four Leg Systems - - - - - - - - Specifications - - - - - - - - - - - - - ii - - - - - - - - - - - - - - Page 26 - Page 27 - Page 28 - Page 28 - Page 28
OPERATION AND INSTALLATION MANUAL Congratulations, on your purchase of the Hardy Process Solutions Load Point Assembly. This product, is engineered to set a new standard in load point assemblies. Hardy combined new innovations with previously extra cost features and just plain common sense features and provided you with optimum performance unequaled anywhere. General Information The Hardy HI LPB Hermetic Load Point System is designed to provide accurate output in the most demanding applications.
HI LPB SERIES LOAD POINT ASSEMBLY Three Load Point Types FIG. 1: FIXED PIN LOAD POINT FIG. 2: BUMPER PIN LOAD POINT FIG.
OPERATION AND INSTALLATION MANUAL Unpacking Installation of the Ground Strap • Do not remove the load point assembly from it’s packaging until just before installation. Although the load sensor is designed for harsh environments, it is a precision instrument and should be treated as such. • Inspect the box, packing and the load point assembly for any signs of damage that might occur during shipment. Since almost all of the load point assemblies are shipped F.O.B.
HI LPB SERIES LOAD POINT ASSEMBLY if you are shipping the vessel fully asssembled on the load points. Step 4. Save the two shortest machine screws, the ones that fasten the shipping brackets to the base plate. You will use these hex bolts to install the ground strap. (See Fig. 1-4) Step 5. Place one of the ground strap connectors over the threaded hole in the base plate. These are the ones that fastened the shipping bracket to the base. (See Fig. 5) FIG. 5: GROUND STRAP INSTALLED NOTE: Page 4 Step 6.
OPERATION AND INSTALLATION MANUAL Site Preparation Precautions WARNING • All mounting surfaces for the base and loading plate must be level. The distance between the mounting surface of the loading plate and base must within 1/32” of the nominal height, “H”. The Load Point Assemblies in a system must be level to within +/- 0.5o. • When mounting the base plate on concrete, use grout to level the plate. • Any welding should be done prior to installation of the load points.
HI LPB SERIES LOAD POINT ASSEMBLY NOTE: All load point assemblies must have the same capacity when used in one scale. Principle #2 • All scales should include one fixed pin-load mount, one bumper pin-load mount. All other load point assemblies in a scale must be the freesliding mount. Principle #3 • Place the fixed pin load mount and the bumper pin load mount as far as possible from each other. • The fixed pin load mount and the bumper pin load mount must be mounted in the same longitudinal axis.
OPERATION AND INSTALLATION MANUAL Round Vessel with 3 Load Point Assemblies S 120 o 120 120o o B F FIG. 6: THREE LOAD CELLS IN ROUND CONFIGURATION Round Vessel with 3 Load Point Assemblies - Angle Config. #1 S F <45 o B FIG.
HI LPB SERIES LOAD POINT ASSEMBLY Round Vessel with 3 Load Point Assemblies - Angle Config. #2 B 120o F o 120 o 120 S FIG. 8: ANGLE FOR ALL LOAD CELLS IN ROUND CONFIGURATION NOTE: For three load point systems, the mounting locations should be spaced120 degrees apart. For four load point systems the mounting locations should be spaced 90 degrees apart. Square Hopper with 3 Load Point Assemblies - Even Load Distribution S F O B FIG.
OPERATION AND INSTALLATION MANUAL Round Vessel with 4 Load Point Assemblies FIG. 10: FOUR LOAD CELLS IN ROUND CONFIGURATION FIG.
HI LPB SERIES LOAD POINT ASSEMBLY Square Hopper with 3 Load Point Assemblies - Uneven Load Distribution B S F FIG. 12: ANGLE FOR THREE LOAD CELLS IN SQUARE CONFIGURATION NOTE: This configuration is an exception to the even load distribution principle. Use this configuration in circumstances where you have several hoppers arranged in close proximity to each other. Typical 4 - Load Point Assembly Installation FIG.
OPERATION AND INSTALLATION MANUAL Typical 6 - Load Point Assembly Installation FIG. 14: SIX LOAD CELLS POSITIONED IN A RECTANGULAR CONFIGURATION NOTE: In case there is some doubt concerning load point assembly installation, contact your local Hardy Dealer, or Hardy Application Engineering Department or Customer Support Department for assistance. You can orient the load point assemblies to meet your system installation requirements. All load point assemblies can be rotated 360o in 90o increments.
HI LPB SERIES LOAD POINT ASSEMBLY For scales that must meet NIST Class 3 (OIML Class 3) specifications: 1. Maximum base plate angle variation: 0.2 degrees. 2. Maximum top plate angle variation 0.5 degrees. For scales that must meet accuracy specifications => 0.1% 1. Maximum base plate angle variation 0.2 degrees 2. Maximum top plate angle variation 1 degree. Installation Procedures Pre-Installation Procedures Step 1.
OPERATION AND INSTALLATION MANUAL hole diameters and center distances. If you do not have Internet access, contact your local Hardy Dealer for a copy of the drawing. Installing the Base Plate Step 1. Make sure that the concrete foundation is level. Step 2. To assist in the installation of the anchor bolts we recommend creating a template using the thru hole diameters of the top plate mounting dimensions.
HI LPB SERIES LOAD POINT ASSEMBLY FIG.
OPERATION AND INSTALLATION MANUAL Step 3. Use wood or metal to create the templates. The size of the template depends on the size of the anchor bolts. Step 4. Mark a point on the template. Use the thru hole center distances from the I/I diagram and measure to another point on the template which equals the center distance of the thru holes on the base plate and make another mark. Do this for each template. Step 5.
HI LPB SERIES LOAD POINT ASSEMBLY FIG. 18: INSTALLING THE FOUR ANCHOR BOLTS FOR THE BASE PLATE Step 10. Install the correct size Jacking Nuts onto the Anchor Bolts so there is about 1/2 inch between the concrete foundation and the jacking nuts. Don’t worry about level at this point, you will level everything after the Load Point Assembly/base plate is Installed. Step 11. Install four flat washers on each anchor bolt above the jacking nuts. Step 12.
OPERATION AND INSTALLATION MANUAL Step 13. Use a small spirit (bubble) level and check to see if the load point assembly is level side to side/corner to corner. Use a box end wrench to adjust each of the jacking nuts until each load point assembly in the system is level. Step 14. Install the base plate nuts. (See Fig. 9) Tighten them finger tight. You may need to adjust the jacking nuts later as you install the rest of the load point assemblies for the weighing system. Step 15.
HI LPB SERIES LOAD POINT ASSEMBLY top plate to the support bracket. If you want to use fasteners to fasten the top plate to the support bracket, use a marker or scribe and trace the thru hole pattern of the top plate on the support bracket. Drill four thru holes or drill and tap four holes for the fasteners. Install the top plate to the support bracket using the four fasteners. Step 3. With the top plates installed, put the vessel support bracket with the top plate onto the pins of the load cells.
OPERATION AND INSTALLATION MANUAL Step 5. To adjust the level of the top plate use shim stock between the top plate and the support bracket. (See Fig. 21) FIG. 21: LEVELING WITH SHIM STOCK Step 6. WARNING If the top plate is tack welded to the support bracket and you can lift the vessel off the load cell pins, finish welding the top plate to the support bracket and lower the vessel back onto the sliding loading pins.
HI LPB SERIES LOAD POINT ASSEMBLY Replacing the Load Sensor Step 1. Use a box end wrench to loosen the adjustment hex nut that fastens the Anti-Lift Off Device to the top plate. (See Fig. 22) Step 2. Adjust the hex screw with your fingers or box-end wrench until the gap between the base plate and washer are between .0785” (2mm) and .1570” (4mm). (See Fig. 22) Step 3. Use a box-end wrench and tighten the adjustment hex nut. Step 1.
OPERATION AND INSTALLATION MANUAL Step 6. Align the Load Cell bolt thru holes with the threaded base plate bolt holes. Step 7. Screw the two Load Cell Bolts into the base plate until they are finger tight only. Step 8. The height (B) dimension, 2.36”, is the minimum required service area above the load cell baseplate to remove the load cell bolts. FIG. 24: B DIMENSION Step 9. Use a torque wrench and tighten the bolt farthest from the cable end first. Then tighten the bolt nearest the cable end.
HI LPB SERIES LOAD POINT ASSEMBLY Troubleshooting Physical Checks Before doing any electrical tests do the following: Step 1. Visually inspect each load point assembly for physical damage. Look for distortions or cracks in all metal parts. Step 2. Check all welds to be sure they are not cracked of have deep pot marks. Step 3. Check all cables for cracks, cuts or crimping. Check for any abrasions on the cables. Step 4. Look for structural changes in the scale or supporting structures. Step 5.
OPERATION AND INSTALLATION MANUAL Step 1. NOTE: Use a millivolt meter or Integrated Technician feature (See Physical Checks, Step 6) and measure the LPS output under “no load” conditions. The reading should be less than 1% of the full scale output. Sensors can shift up to about 10% of their full scale and still function correctly. Step 2. If the output has shifted more than 1%, replace the sensor.
HI LPB SERIES LOAD POINT ASSEMBLY Remedy: Step 1. NOTE: Be careful NOT to include the two C2 wires. Step 2. WARNING Use a megohmmeter and measure the resistance between all five wires tied together and the load cell metal body. The measured value should be 5,000 megohms or more. WHEN USING A MEGGER DO NOT EXCEED 50 VOLT RANGE. Step 3. Step 4. Step 5. Electrical Termination Cable Color Codes Tie together the load sensor excitation (2), signal (2) and ground (1) wires.
OPERATION AND INSTALLATION MANUAL Model Numbers NOTE: The -43F/B/S indicates a stainless steel load sensor with stainless steel mounting hardware. For galvanized mounting hardware use -45 F/B/S Capacity Model # Model # Model # LBS Kn Fixed Assembly Bumper Assembly Slider Assembly 44 0.2 HI LPB44-43F HI LPB44-43B HI LPB44-43S 110 0.
HI LPB SERIES LOAD POINT ASSEMBLY Four Leg Systems Total Capacity Model # Pounds Kgs HI 4B175.5K-43 175 79 HI 4B440-43 440 200 HI 4B880-43 990 408 HI 4B1.8K-43 1.8K 816 TABLE 6: FOUR LEG SYSTEMS Specifications Operating Specifications Rated Output (F.S.
OPERATION AND INSTALLATION MANUAL Print the unit serial number and model number for reference when ordering parts for the HI LPB Load Point Assembly The serial number can be found on the side of the load sensor, or by entering the SelfTest Mode.
