Rice Lake MASTER 421 Installation Manual
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Rice Lake MASTER 421 Installation Manual

Rice Lake MASTER 421 Installation Manual

Belt scale weighframe
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MASTER 421
Belt Scale Weighframe
Installation Manual
PN 176119

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Summary of Contents for Rice Lake MASTER 421

  • Page 1 MASTER 421 Belt Scale Weighframe Installation Manual PN 176119...

  • Page 3: Table Of Contents

    Course descriptions and dates can be viewed at www.ricelake.com/training or obtained by calling 715-234-9171 and asking for the training department. © Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America. Specifications subject to change without notice.
  • Page 4 Rice Lake continually offers web-based video training on a growing selection of product-related topics at no cost. Visit www.ricelake.com/webinars MASTER Series 421 Belt Scale...

  • Page 5: Introduction

    Not every application is suited for a belt scale; this has to be analyzed by a Rice Lake Weighing Systems specialist. To achieve the optimum result, the Master™ belt scale series has been developed for a number of applications and for every type of conveyor.

  • Page 6: Overview

    Load cell capacity is calculated based on the maximum belt load plus the dead load of the weighframe and the weight of the rollers. Contact Rice Lake Weighing Systems technical support for assistance. Net load = (conveyor capacity / belt speed) x idler spacing...

  • Page 7: Installation

    Installation Installation procedures generally should be a combination of the end user’s best engineering practices in compliance with local codes and the manufacturer’s recommendations. To achieve maximum performance, the following precautions should be observed. WARNING • Take all necessary safety precautions when installing the scale carriage including wearing safety shoes, protective eye wear and using the proper tools.

  • Page 8: Mechanical Installation

    Mechanical Installation The mechanical installation of a belt scale consists of mounting the belt scale, the side brackets, the speed pickup and the junction box. 2.1.1 Weighframe Installation Use the following instructions to install the MASTER Series 421 Belt Scale. 1.
  • Page 9 5. Align the weighframe with the holes in the conveyor and secure to the conveyor using the appropriate hardware. Figure 2-3. Secure the Weighframe Important Ensure that the axle is secured tightly on only one side of the idler, leaving the other side loose. 6.

  • Page 10: Side Bracket Installation

    2.1.2 Side Bracket Installation Use the following instructions to install the side brackets on the leading and trailing idlers. 1. While holding the side bracket against the conveyor, align the axle with the arm of the leading idler and mark out drill holes. Figure 2-5.
  • Page 11 6. Repeat side bracket installation on the trailing idler and ensure that the center line of the axles are all aligned. Figure 2-8. Install Side Bracket on Trailing Idler Ensure the center line of the axles are aligned. Repeat the side bracket installation on the opposite side of the leading and trailing idlers, ensuring that they are parallel with the first side.

  • Page 12: Electrical Installation

    Electrical Installation The wiring and connections between the weighframe, speed pickup and the electronics are shown in the applicable scheme. See Section 3.2 on page 10. The load cell is provided with a fixed cable; do not alter the length. If necessary, use an additional junction box with screw terminals to extend the cable length.

  • Page 13: Maintenance

    Maintenance Regular maintenance is essential to prevent errors or unnecessary down time. The supplier does not accept any responsibility for the consequences of not performing the maintenance recommended in this section. Maintenance Before any work on electrical systems is started, be sure to remove the main power supply. WARNING The conveyor must be shut off before any work on the conveyor is started.

  • Page 14: Dimensional Drawings

    Dimensional Drawings Figure 3-1. Weighframe Dimensions MASTER Series 421 Belt Scale...
  • Page 15 NOTE: ASSEMBLIES ARE MIRRORS. Figure 3-2. Weighframe Dimensions (Continued) Maintenance...
  • Page 16 2.78” (70 mm) 1.38” (35 mm) 1.78” 3.14” (45 mm) (80 mm) 3.93” (100 mm) 1.75” (44 mm) 1.125” (29 mm) 1.78” (45 mm) 1.20” (30 mm) Figure 3-3. Side Bracket Dimensions MASTER Series 421 Belt Scale...
  • Page 17 Figure 3-4. MASTER Series 421 Belt Scale Layout Maintenance...

  • Page 18: List Parameters For Belt Scale

    List Parameters for Belt Scale Complete the information below. Remove this page and store in a secure location. CUSTOMER ORDER NUMBER INSTALLATION REFERENCE TYPE WEIGHFRAME TYPE SPEED PICKUP TYPE ELECTRONICS DATE FILLED IN BY Parameter Unit Entered Change Nominal capacity (flow) lb/hr (kg/hr) Maximum capacity (flow) lb/hr (kg/hr)

  • Page 19: Appendix

    Appendix Specifications Standard Weighframe Material Powder coated mild steel or Stainless Steel SS304 / 316 Weight Approximately 15 lb (7.5 kg) not including the idler Load Cells 2 single ended beam (stainless steel, IP66/IP68) Capacity 5 — 50 kg (each) Power supply 5-15 VDC (stabilized from electronics) Signal nominal 2 mV/V at 100% load Total Load Cell Build Conversion...
  • Page 20 MASTER Series 421 Belt Scale...
  • Page 22 Specifications subject to change without notice. Rice Lake Weighing Systems is an ISO 9001 registered company. 230 W. Coleman St. • Rice Lake, WI 54868 • USA U.S. 800-472-6703 • Canada/Mexico 800-321-6703 • International 715-234-9171 • Europe +31 (0)26 472 1319 www.ricelake.com...

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