Bench Scale CW-90B/90XB Installation & Service Manual 155605
Contents 1.0 Introduction.................................................................................................................................. 1 1.1 CW-90B/90XB Bench Scale Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.0 Installation ................................................
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1.0 Introduction This manual provides reference information to install and wire the CW-90B/90XB bench scale which is shown in Figure 1-1. Figure 1-1. CW-90B/90XB Bench Scale The CW-90B and CW-90XB are both NTEP-certified and available in a 10" x 10" (254 mm x 254 mm) and 12" x 12" (304 mm x 304 mm) platform with capacities from 5 to 100 lb (2.5 to 50 kg). The light capacity scales are constructed with 304 stainless steel to withstand many years of rugged use.
1.2 Safety Safety Symbol Definitions: Indicates a potentially hazardous situation that, if not avoided could result in death or serious injury, and WARNING includes hazards that are exposed when guards are removed. Indicates information about procedures that, if not observed, could result in damage to equipment or Important corruption to and loss of data. General Safety Do not operate or work on this equipment unless you have read and understand the instructions and warnings in this manual.
2.0 Installation The following sections explain the installation procedure for the CW-90B and CW-90XB bench scales. 2.1 Unpacking Your Scale Immediately after unpacking, visually inspect the scale to ensure that the unit is undamaged. The shipping carton should contain the bench scale and this manual. If the bench scale was damaged in shipment, notify Rice Lake Weighing Systems and the shipper immediately. 2.
2.3 Connecting the Load Cell Cable The CW-90B and CW-90XB come with a standard 10 foot or 34 inch color-coded load cell cable. See your indicator manual to determine the proper load cell cable input connectors. Important Do not cut the load cell cable. The load cell cable is temperature compensated for an exact cable length. 2.4 Grounding the Scale Base Scale bases can build up static electricity during weighing operations.
3.0 Calibration Note See your indicator manual for specific indicator calibration procedures. It is recommended that the scale be “exercised” by loading it with test weights. Do this two or three times before calibrating to make sure that the scale is seated. To calibrate the CW-90B/90XB scale, place test weights on the scale platform equal to 70 - 100% of the scale’s capacity. If several weights are used, distribute them evenly around the platform.
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5.0 Load Cell Replacement Removing a Load Cell 1. Unplug AC power from the indicator and disconnect the load cell cable from the indicator. 2. Remove the scale top cover. 3. Use a 1/2" wrench to remove the upper load cell screws. Upper load cell screws and washers Top Cover Figure 5-1. Remove Scale Top and Upper Load Cell Screws 4. Remove the scale’s spider plate. 5. Remove the upper spacer and set it aside. 6.
7. Turn the scale over and back off the overload protection screw one complete turn to provide clearance. 8. Remove the lower load cell screws. 9. Carefully turn the base plate upright to remove the load cell and cable from the scale. Discard load cell. Bottom load cell screws and washers Overload protection screw Load Cell Load cell shim Bottom View Figure 5-3.
6.0 Replacement Parts 1 12 13 11 2 3 4 5 10 6 15 8 12 7 11 3 9 Figure 6-1. CW-90B/90XB Bench Scale Assembly Parts Illustration Item No. Description Qty. 1 Top Cover 1 2 Spider Plate 1 3 Nut, 1/4-20NC 8 4 Screw Cap, 1/4 -20NC, Hex Head 4 5 Load Cell 1 6 Base Plate 1 7 Screw, 8-32NC x 3/16 1 8 Label Roll, 4.00" x .
CW-90B/90XB Bench Scale Limited Warranty Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a Distributor or Original Equipment Manufacturer (OEM) will operate per written specifications as confirmed by the Distributor/OEM and accepted by RLWS. All systems and components are warranted against defects in materials and workmanship for two years for the CW-90B and three years for the CW-90XB.
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