LCWD Series Load Washer & Compression Load Cells INSTRUCTION SHEET M1131/0509 Shop online at: omega.com e-mail: firstname.lastname@example.org For latest product manuals: omegamanual.info Cautionary Notes for Safe Product Use. WARNING! This symbol in this manual indicates a potential danger or hazard capable of resulting in a serious injury or loss of life. DESCRIPTION The OMEGA® LCWD Series Load Cell is a compact design with a full Wheatstone Bridge. Typical applications include Clamping Forces, Die Loads, Bolt Stresses, Weighing Systems, and Structural Loads. The load washer can be used as a washer, sensing compression force, or a compression load cell. When utilized as a compression load cell, the load buttons supplied should be used. If the height of the buttons provided is too restrictive, you can use one or none of the buttons. When you are using less than 2 buttons, be sure that the active ridge (inside) of the washer is seated on a flat surface that transmits the load. Whenever possible, the buttons provided should be used because they insure correct loading. When used as a washer load cell, the set of spherical washers should be used as a washer cell, the set of spherical washers should be used on one side of the load cell and a flat washer (not provided) on the other side of the washer. When choosing a flat washer, make sure that the inner diameter of the flat washer is less than the diameter of the inner ring of the load washer to insure that the active ridge is seated on the flat washer. The following load cell types are available from OMEGA Engineering: Dimensions in Inches (mm) LOAD CELL Part Number LCWD-200 LCWD-500 LCWD-1K LCWD-2K LCWD-5K LCWD-10K LCWD-20K LCWD-50K LCWD-100K LCWD-200K Rated Capacity 200 lb 500 lb 1,000 lb 2,000 lb 5,000 lb 10,000 lb 20,000 lb 50,000 lb 100,000 lb 200.000 lb Weight 1.0 lb 1.0 lb 1.0 lb 1.0 lb 1.0 lb 1.0 lb 1.5 lb 2.0 lb 3.0 lb 6.0 lb Bore 0.40 (10) 0.40 (10) 0.40 (10) 0.40 (10) 0.40 (10) 0.40 (10) 0.50 (13) 0.76 (19) 1.01 (26) 1.51 (39) O. D. 1.00 (25) 1.00 (25) 1.00 (25) 1.00 (25) 1.00 (25) 1.00 (25) 1.20 (30) 1.75 (44) 2.25 (57) 3.00 (77) H 0.35 (9.0) 0.35 (9.0) 0.35 (9.0) 0.35 (9.0) 0.35 (9.0) 0.35 (9.0) 0.40 (10) 0.50 (13) 0.70 (18) 1.25 (32) Part Number SPW-2 SPW-2 SPW-2 SPW-2 SPW-2 SPW-2 SPW-3 SPW-5 SPW-7 SPW-7 SPHERICAL WASHERS Bore H of Size Button 0.35 (8.9) 0.37 (9.4) 0.35 (8.9) 0.42 (10.7) 0.35 (8.9) 0.55 (14.0) 0.35 (8.9) 0.55 (14.0) 0.35 (8.9) 0.55 (14.0) 0.35 (8.9) 0.55 (14.0) 0.41 (10.3) 0.76 (19.3) 0.66 (16.7) 1.0 (25.4) 0.94 (23.8) 1.5 (38.0) 0.94 (23.8) 2.0 (50.8) Bolt Size 5/16 (7.9) 5/16 (7.9) 5/16 (7.9) 5/16 (7.9) 5/16 (7.9) 5/16 (7.9) 3/8 (9.5) 5/8 (15.9) 7/8 (22.2) 7/8 (22.2) UNPACKING Remove the Packing list and verify that all equipment has been received. If there are any questions about the shipment, please call OMEGA Customer Service Department. Upon receipt of shipment, inspect the container and equipment for any signs of damage. Take particular note of any evidence of rough handling in transit. Immediately report any damage to the shipping agent. NOTE: The carrier will not honor any claims unless all shipping material is saved for examination. After examining and removing contents, save packing material and carton in the event reshipment is necessary. DIMENSIONS TYPICAL EXAMPLE BLACK -EXC GREEN +OUT WHITE -OUT BOLT SPHERICAL WASHER LOAD CELL O.D. I.D. FLAT WASHER STRUCTURE CABLE H INSTALLATION SCHEMATIC RADIUS H BUTTON T LOAD CELL H BUTTON BOLT SPHERICAL WASHER SET LOAD CELL FLAT WASHER (NOT INCLUDED) STRUCTURE HOW LOAD CELLS WORK Load cells have an output or sensitivity in mV/V. What this sensitivity/output represents is as follows: Change in millivolt output from zero load to the full = output/sensitivity x excitation scale capacity of the load cell (2.13 mV/V) (10.0 VDC) (21.3 mV in this example) No load cell has exactly zero millivolts at no load. Most cells have a small millivolt DC offset of a few millivolts which is normal. To scale a system the end user just scales his recorder/meter for a full scale change of (21.3 mV per example), and connects the load cell in a no load situation and rezeros the pens/display for a correct zero reading. WIRING DIAGRAM 10 VDC REGULATED POWER SUPPLY – + RED (+EXC) BLACK (–EXC) GREEN (+SIG) – + METER WHITE (–SIG) WASHER LOAD CELL SPECIFICATIONS Excitation: Output: Accuracy: Zero Balance: Operating Temp Range: Compensated Temp Range: Thermal Effects: Zero: Span: Safe Overload: Ultimate Overload: Bridge Resistance: Full Scale Deflection: Construction: Electrical: 10 Vdc (15 V Max) 2 mV/V ± 20% Linearity, Hysteresis and Repeatability Combined: ≤ 10 K = ±0.5% BFSL > 10 K = ±0.75% BFSL ±4.0% FSO 40 to 127°C (-40 to 260°F) 16 to 71°C (60 to 160°F) ±0.01% FSO/°F ±0.01% FSO/°F 120% of Capacity 200% of Capacity 350 Ω (min) > 50 K (700 Ω ≤ 50 K) 0.001" typical Stainless Steel 5 ft (1.5 m) PFA insulated, shielded cable IMPORTANT SAFETY INFORMATION WARNING! These components are used under high forces. They should only be installed and operated by qualified, authorized personnel. WARNING! DO NOT MODIFY THIS LOAD CELL AND ITS COMPONENT PARTS OR SUBSTITUTE PARTS. Because of the danger of introducing hazards; do not perform any unauthorized modifications or install substitute parts to the instrument. NOTES: OMEGAnet ® Online Service omega.com Internet e-mail email@example.com Servicing Europe: Servicing North America: U.S.A.: ISO 9001 Certified Canada: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047 Stamford, CT 06907-0047 Toll-Free: 1-800-826-6342 Tel: (203) 359-1660 FAX: (203) 359-7700 e-mail: firstname.lastname@example.org 976 Bergar Laval (Quebec), Canada H7L 5A1 Toll-Free: 1-800-826-6342 TEL: (514) 856-6928 FAX: (514) 856-6886 e-mail: email@example.com Benelux: Managed by the United Kingdom Office Toll-Free: 0800 099 3344 TEL: +31 20 347 21 21 FAX: +31 20 643 46 43 e-mail: firstname.lastname@example.org Czech Republic: Frystatska 184 733 01 Karviná, Czech Republic Toll-Free: 0800-1-66342 TEL: +420-59-6311899 FAX: +420-59-6311114 e-mail: email@example.com France: Managed by the United Kingdom Office Toll-Free: 0800 466 342 TEL: +33 (0) 161 37 29 00 FAX: +33 (0) 130 57 54 27 e-mail: firstname.lastname@example.org For immediate technical or application assistance: U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA® Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany Toll-Free: 0 800 6397678 FAX: +49 (0) 7056 9398-29 Customer Service: 1-800-622-2378/1-800-622-BEST® Engineering Service: 1-800-872-9436/1-800-USA-WHEN® Mexico: En Español: 001 (203) 359-7803 email@example.com FAX: (001) 203-359-7807 e-mail:firstname.lastname@example.org TEL: +49 (0) 7059 9398-0 e-mail: email@example.com United Kingdom: OMEGA Engineering Ltd. ISO 9001 Certified One Omega Drive, River Bend Technology Centre, Northbank Irlam, Manchester M44 5BD England Toll-Free: 0800-488-488 TEL: +44 (0)161 777-6611 FAX: +44 (0)161 777-6622 e-mail: firstname.lastname@example.org It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves the right to alter specifications without notice. WARNING: These products are not designed for use in, and should not be used for, human applications. WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs. OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages. CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner. RETURN REQUESTS / INQUIRIES Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence. The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit. FOR WARRANTY RETURNS, please have the following information available BEFORE contacting OMEGA: 1. Purchase Order number under which the product was PURCHASED, 2. Model and serial number of the product under warranty, and 3. Repair instructions and/or specific problems relative to the product. FOR NON-WARRANTY REPAIRS, consult OMEGA for current repair charges. Have the following information available BEFORE contacting OMEGA: 1. Purchase Order number to cover the COST of the repair, 2. Model and serial number of the product, and 3. Repair instructions and/or specific problems relative to the product. OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering. OMEGA is a registered trademark of OMEGA ENGINEERING, INC. © Copyright 2009 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.
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