HI LPRC03 SERIES LOAD POINT ASSEMBLIES OPERATION AND INSTALLATION MANUAL Corporate Headquarters 9440 Carroll Park Drive Suite 150, San Diego, CA 92121 Phone: (858) 278-2900 FAX: (858) 278-6700 Web-Site: http://www.hardyinst.com Hardy Instruments Document Number: 0596-0309-01 Rev. B Copyright July 2008 Hardy Instruments, 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.
Table of Contents Table of Contents Table of Contents - - - - - - - - - - - - - - - - - - - -Page i General Information- - - - - - - - - - - - - - - - - Unpacking - - - - - - - - - - - - - - - - - - - - - Precautions- - - - - - - - - - - - - - - - - - - - - Site Preparation - - - - - - - - - - - - - - - - - - Basic Engineering Principles for Positioning Load Point Assemblies - - - - - - - - - - - - - - Typical Mounting Arrangements- - - - - - - - - - - Round Vessel - 3 Load Point Assemblies - - - - Round V
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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 INSTRUMENTS IMMEDIATELY BY CALLING, FAXING OR E-MAILING TO: Customer Support Department HARDY INSTRUMENTS, INC.
OPERATION AND INSTALLATION MANUAL General Information The Hardy Instruments (HI) LPRC03 Low Profile Series, with self-aligning load points, is designed for applications in hoppers, tanks and silos. The HI LPRC03 Advantage Loadpoint consists of a hermetically sealed, stainless steel load sensor (gauge area and cable entry), with Enhanced C2® Second Generation Calibration, and a matched mV/V and mV/V/ Ohm and a 1/4 inch conduit adapter and mount.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY LOAD SENSOR CERTIFICATION SHEETS ARE AVAILABLE 24 HOURS A DAY AT OUR WEBSITE: http://www.hardinst.com. Go to “Products” or “Support,” click Advantage Load Sensor Tool/Certification, then follow directions. Note the serial number(s) for reference when talking to Hardy Customer Service. Store this information in a safe location for future reference.
OPERATION AND INSTALLATION MANUAL Typical Mounting Arrangements Round Vessel - 3 Load Point Assemblies FIG. 1: ROUND VESSEL TANK - 3 LOAD CELLS Round Vessel - 4 Load Point Assemblies FIG.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Installing a Mount Assembly Step 1. Read the Operation and Installation Manual first to familiarize yourself with the installation process. Step 2. Unpack the mount. Step 3. The load sensor is separaely crated. Set it aside in a safe location to be installed after all the welding has been completed. Step 4. Place the mount on the foundation plates. Step 5. Level each mount top plate. Note that all load points should be within +/- 0.5o of each other.
OPERATION AND INSTALLATION MANUAL Step 7. Weld or bolt the top plate to the load carrier. FIG. 5: WELD OR BOLT THE TOP PLATE Step 8. If you bolt the plate, fasten the left two bolts snugly, but the right two bolts loosly. FIG. 6: BOLTING ADVICE NOTE: The basic mount serves as a construction block. Do not install the load sensor until al welding has been completed.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Step 9. Unpackage the load sensor and place the Top and Bottom Load Sensor Housings on the Load Sensor. FIG. 7: LOAD SENSOR Step 10. Apply a layer of grease to the O-rings inside the loading cups and assemble cups with the load sensor. Step 11. Slide the load sensor assembly with cups between the bottom and top plate into position with the loading cups facing as shown. FIG.
OPERATION AND INSTALLATION MANUAL Step 12. Be sure to line up the horizontal anti-rotation notch. Step 13. Mount the lower clamp and tighten the screws. When you mount the upper clamp, tighten screws loosely for now. FIG. 9: FASTEN CLAMPS Step 14. Remove the bolts holding the parts together, then tighten the two bolts that were left loose in step eight. FIG. 10: REMOVE BOLTS Step 15. Place a hydraulic jack between the top and bottom plates. Apply just enough lift to remove the spacers. FIG.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Step 17. Remove the jack, then tighten the upper clamp bolts that were left loose in Step 13. Step 18. Set lift off gap to about 1.5-3 mm and secure it with the locking screw. FIG. 12: SET GAP CAUTION: DO NOT REINSTALL THE SHIPPING BOLT WHICH IS USED FOR ALIGNMENT ONLY. IF REINSTALLED, IT WILL YIELD IMPROPER WEIGHT READINGS. Step 19.
OPERATION AND INSTALLATION MANUAL NOTE: For additional help with the load point installation, contact your local Hardy Instruments Representative or either Application Engineering or Customer Support at the Hardy Instruments company. Troubleshooting Physical Checks Follow these steps before runing any electrical tests: Step 1. Visually inspect each load point assembly for physical damage. If you find any problems, replace the part that is damaged. • Look for distortions or cracks in all metal parts.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Electrical Tests for Load Point Assembly Problems Zero Balance Test Problem: Changes in the Zero Balance. Cause: Load Cell has been overloaded. Remedy: Step 1. Use a millivolt meter or the Integrated Technician feature of the weighing instrument and measure the signal output under “no load” conditions. The reading should be less than 1% of the full scale output. NOTE: Output sensitivity can shift up to about 10% of their full scale and still function correctly.
OPERATION AND INSTALLATION MANUAL Resistance to Ground Test Problem:Electrical leakage is creating an unstable output from the instrument. Cause:Water contamination in the load sensors or cables. Remedy: Step 1. Tie together the load sensor excitation (2), signal (2) and ground (1) wires. NOTE: Be careful NOT to include the two C2 wires. Step 2. Use a megohmmeter and measure the resistance between all five wires tied together and the load cell metal body.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Capacity Model # Model # LBS MT Fixed Assembly Spare Load Sensor 66K 30 HI LPRC03-66K-45C HI RCH03-66K 110K 50 HI LPRC03-110K-45C HI RCH03-110K 200K 90 HI LPRBc03-200K-45C HI RCH03-200K TABLE 1: MODEL NUMBERS & CAPACITIES Specifications Operating Specifications • Rated Output (F.S.)2+-0.002mv/v • Non-Linearity+-0.012% R.O. • Hysteresis<+-0.025% R.O. • Zero Balance<+-1.0% R.O. • Creep @ 5 Min.<+-0.010% R.O. • Temp Effect Output<+-0.
OPERATION AND INSTALLATION MANUAL • Load Sensor Material17-4 Martensitic (Magnetic) Stainless Steel • Load Sensor Fittings Coated Tool Steel • Top Plate & Base Plate Material 316 Stainless Steel or Zinc Plated Steel • Conduit Adapter. 250-18 NPT • Hermetic Sealing • Gauging Area Welded Cylindrical Sleeve • Cable Entry Glass to Metal Header Drawings See the section Installing Load Point Assembly for installation procedures.
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Drawing 1: Module assembly for shipment, positioned on site, and showing the welding alternatives Page 14
OPERATION AND INSTALLATION MANUAL Drawing 2: Welded module installed Page 15
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Drawing 3: Bolted module installed Mark “F” indicates the center of the load, which coincides with the center of the tank leg, etc.
OPERATION AND INSTALLATION MANUAL Drawing 5: Bolted module installed Page 17
HI HLPRC03 SERIES LOAD POINT ASSEMBLY Record Model Information Please print the unit serial number and model number for reference when ordering parts for the HI LPRC Load Point Assembly The serial number can be found on the side of the load sensor, or by entering the SelfTest Mode of the HI 2151/30WC.
