MASTER 211 Belt Scale Weigh Frame
“
Specifications:
- Product Name: MASTERTM 211 Belt Scale Weigh Frame
- Installation Manual Date: June 23, 2025
- Model Number: PN 165455 Rev B
Product Information:
The MASTERTM 211 Belt Scale Weigh Frame is designed to measure
continuous mass flow transported over a belt conveyor.
Installation:
2.0 Installation:
Follow the installation manual provided to properly install the
belt scale weigh frame.
2.2 Electrical Installation:
Ensure proper electrical installation following the guidelines
provided in the manual. Use recommended cable types for optimal
performance.
2.2.1 Cable Types:
Refer to the manual for specific cable types recommended for the
electrical installation of the belt scale weigh frame.
Maintenance:
3.0 Maintenance:
Regular maintenance is essential for the proper functioning of
the belt scale weigh frame.
3.1 Maintenance:
Perform periodical maintenance as outlined in the manual to keep
the equipment in good working condition.
3.1.1 Periodical Maintenance:
Follow the maintenance schedule provided in the manual to ensure
optimal performance of the belt scale weigh frame.
3.2 List Parameters for Belt Scale:
Refer to the manual for a list of parameters specific to the
belt scale weigh frame for maintenance purposes.
Appendix:
Additional information and resources can be found in the
product’s appendix section of the manual.
FAQ:
Q: Where can I find technical training seminars for the
MASTERTM 211 Belt Scale Weigh Frame?
A: Technical training seminars are available through Rice Lake
Weighing Systems. Visit www.ricelake.com/training or call
715-234-9171 for more information.
A: Rice Lake offers web-based video training at no cost. Visit
www.ricelake.com/webinars for more information.
“`
MASTERTM 211
Belt Scale Weigh Frame
Installation Manual
June 23, 2025
PN 165455 Rev B
© Rice Lake Weighing Systems. All rights reserved.
Rice Lake Weighing Systems® is a registered trademark of Rice Lake Weighing Systems.
All other brand or product names within this publication are trademarks or registered trademarks of their respective companies.
All information contained within this publication is, to the best of our knowledge, complete and accurate at the time of publication. Rice Lake Weighing Systems reserves the right to make changes to the technology, features, specifications and design of the equipment without notice.
The most current version of this publication, software, firmware and all other product updates can be found on our website:
www.ricelake.com
Revision History
This section tracks and describes manual revisions for awareness of major updates.
Revision A B
Date
Description
September 8, 2023 Established revision history; added lever ratio details June 23, 2025 Updated Selection Criteria; added disposal information
Table i. Revision Letter History
Revision History
Technical training seminars are available through Rice Lake Weighing Systems. 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
3
Master 211 Belt Scale Weigh Frame
Contents
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.4 Selection Criteria. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.5 Calibration and Test Weight Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Mechanical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1.1 Installation Weigh Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1.2 Installation Speed Pickup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1.3 Installation Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2.1 Cable Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.1 Mechanical Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.2 Electronics Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.3 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.0 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1.1 Periodical Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 List Parameters for Belt Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.0 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Installation and Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.3 Total Load Cell Build Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Rice Lake continually offers web-based video training on a growing selection of product-related topics at no cost. Visit www.ricelake.com/webinars
4
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Introduction
1.0 Introduction
A belt scale measures a continuous mass flow, which is transported over a belt conveyor. A complete belt scale is composed of a weigh
frame, which contains one or more load cells, a speed pickup and the Integrator electronics (see drawing WBF-S0000).
Not every application is suited for a belt scale, this has to be analyzed by a Rice Lake Weighing Systems specialist. A series of weigh frames
have been developed for a number of applications and for every type of conveyor, to achieve the optimum result.
The Master BS211 Belt Scale System must be installed by qualified service technicians only, according to this manual.
i
Manuals are available from Rice Lake Weighing Systems at www.ricelake.com/manuals Warranty information is available at www.ricelake.com/warranties
1.1 Safety
Safety Definitions:
DANGER: Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. Includes hazards that are exposed when guards are removed.
WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in serious injury or death. Includes hazards that are exposed when guards are removed.
CAUTION: Indicates a potentially hazardous situation that, if not avoided, could result in minor or moderate injury.
IMPORTANT: Indicates information about procedures that, if not observed, could result in damage to equipment or corruption to and loss of data.
General Safety
Do not operate or work on this equipment unless this manual has been read and all instructions are understood. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Rice Lake Weighing Systems dealer for replacement manuals.
WARNING
Failure to heed could result in serious injury or death.
Some procedures described in this manual require work inside the enclosure. These procedures are to be performed by qualified service personnel only. Take all necessary safety precautions when installing the scale carriage including wearing safety shoes, protective eye wear, and using the proper tools. Keep hands, feet and loose clothing away from moving parts. DO NOT approach a running conveyor from underneath. DO NOT bend over a running conveyor. DO NOT allow minors (children) or inexperienced persons to operate this unit. DO NOT operate without all shields and guards in place. DO NOT jump on the scale. DO NOT use for purposes other then weight taking. DO NOT place fingers into slots or possible pinch points. DO NOT use any load bearing component that is worn beyond 5% of the original dimension. DO NOT use this product if any of the components are cracked. DO NOT exceed the rated load limit of the unit. DO NOT make alterations or modifications to the unit. DO NOT remove or obscure warning labels. DO NOT use near water.
© Rice Lake Weighing Systems All Rights Reserved
5
Master 211 Belt Scale Weigh Frame
1.2 Disposal
Product Disposal
The product must be brought to appropriate separate waste collection centers at the end of its life cycle. Proper separate collection to recycle the product helps prevent possible negative effects on the environment and to health, and promotes the recycling of the materials. Users who dispose of the product illegally shall face administrative sanctions as provided by law.
1.3 Overview
The weigh frame model BS211 is designed for heavier applications in the process industry, where good accuracy and/or legal approval is demanded. The dimensions are generated from the construction of the existing or to be build belt conveyor. Optionally this belt scale can be supplied with the approval according to the ATEX directive in the categories II2D or II3D.
Theory of Operation
The material is carried by the belt and the under laying rollers. One or more of these rollers is mounted on the weigh frame and is weighed. Therefore the amount of material lying on the belt is weighed. The belt speed is measured as well. Both values (belt load and belt speed) are calculated in an integration function in the electronics. These electronics totalize, calculate the mass flow, displays these and transfers it through outputs or any other way of communication to a control system or network. For the operation, we refer to the manual of the electronics installed.
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Introduction
1.4 Selection Criteria
Load cell capacity is calculated based on the maximum belt load plus the dead load of the weight frame and the weight of the rollers. Net load = (conveyor capacity / belt speed) x idler spacing Gross load = net load + (idler weight + belt weight + mounting hardware)
Example (Imperial): Net load = (50,000 lb per minute / 400 feet per minute) x 4 foot spacing Net load = (125 lb per foot) x 4 foot spacing Net load = 500 lb
Gross load = 500 lb + (175 lb idler + 48 lb belt + 24 lb hardware) Gross load = 747 lb
Because the 211 is a pivoted weigh frame, the Lever Ratio must be factored into the total load cell build (see Section 4.3 on page 15) Total load cell build: 747 lb x 0.75 = 560 lbs.
NOTE: The 211 uses the RL20000 S-Beam load cell. In this example, the 750 lb size load cell should be used.
Example (Metric) Net load = (24,000 kg per minute / 120 meters per minute) x 1 meter spacing Net load = (200 kg per meter) x 1 meter spacing Net load = 200 kg
Gross load = 112 kg + (90 kg idler + 15 kg belt + 7 kg hardware) Gross load = 312 kg
Because the 221DB is a pivoted weigh frame, the Lever Ratio must be factored in to the total load cell build (See Section 4.3 on page 15). Total load cell build: 312 kg x 0.75 = 234 kg
NOTE: A minimum of a 500 kg load cell should be used in this example.
1.5 Calibration and Test Weight Device
The weigh frame can be provided with mounting points to apply test weights. This is to check accuracy, after the initial calibration has been done. Then the reproducibility and the state of the belt scale can be determined. To determine absolute accuracy, it is necessary to do a test with material. For this procedure, we refer to the manual of the electronics installed.
© Rice Lake Weighing Systems All Rights Reserved
7
Master 211 Belt Scale Weigh Frame
2.0 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 within the parameters designed into the system, 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. Always turn off the power supply, before any connection is made or removed. Before welding, the power supply must be off and the connectors removed. The load cell is very sensitive to damage by welding. The welding ground clamp must be fixed to the same side of the load cell (the weigh frame), where welding. When in doubt, remove the load cell(s).
IMPORTANT: Follow the recommendations given when the application was checked. Belt conveyor must be installed in a stable and rigid area, free from vibrations. The construction of the belt frame must be stiff enough to prevent torsion or bending at the maximum load (including the weigh frame). The weigh frame must be mounted free of mechanical tensions. No vibrations in the conveyor should be allowed to carry over to the weigh frame. If needed, these must be filtered. The belt must be of a good quality and the weld must not influence the weighing. A good fit consists of more than one part and welds, the weight per meter must be constant over the whole length. The belt must not track out of the center and no steering idler must be placed near the weighing area. The belt support must not be provided with two part (v-shape) idler stations. At least three idler stations before and three idler stations after the weigh frame (the weighing section) have to be adjustable in height. For short belt conveyors this can be reduced to one roller before and one roller after the weigh frame. Every roller or idler station must be water leveled in cross direction on the frame carriers. A tolerance of +/- 0.5 mm is accepted, measured between the ends of the middle carrier roller. Rollers should not have a concentricity exceeding +/- 0.3 mm. It must be possible to mount a speed pickup on an non driven drum or roller. We strongly recommend not using a measuring wheel. The inclination angle of the belt conveyor should not exceed 15º. Air flowing along should not have any effect on the weighing. A possible side guiding should not have any effect on the weighing. ATEX: If the system is placed in zone 21 or zone 22, it must be connected to earth as indicated on the drawings.
2.1 Mechanical Installation
The mechanical installation of a belt scale consists of mounting the weigh frame, the speed pickup and the junction box.
2.1.1 Installation Weigh Frame
The design and the installation of the weigh frame depend on the type of conveyor. The weigh frame is supplied in one part and it also must be mounted in one part, according to the specific drawing. Use drawing BS211-M0200 or the specific project drawing.
1. Determine the location of the weighing roller station(s). 2. Determine from the hart of the weighing roller, the position of the load cell carriers and pivots. Point out the position of the holes and
drill the holes Ø18 mm. 3. Mount the weigh frame. 4. Place the weighing roller station on the mounting plates and point out its location for welding. 5. Weld the plates to the weighing roller station, after taking them off the weigh frame. Do not weld on the weigh frame, to prevent
damage to the load cell. 6. Adjust the rollers in the weighing section (three before, one on and three after the weigh frame) against the rollers (or any other belt
support) both before and after the weigh section.
2.1.2 Installation Speed Pickup
1. Mount the speed pickup, according to the drawing, at a (non-driven) tail drum or running roller.
2.1.3 Installation Junction Box
1. Mount the junction box near the weigh frame, not further than 0.5 meter from it. The cable glands must point downwards.
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Installation
2.2 Electrical Installation
The wiring and connections between weigh frame, speed pickup and the electronics are shown in the applicable scheme, see Section 4.1 on page 14. The load cell is provided with a fixed cable; do not alter the length. An additional junction box with screw terminals is provided to extend cable length.
2.2.1 Cable Types
Load cell
· If the length is less than 60 meters, use shielded 4 wire cable 0.75 mm². · If the length is more than 60 meters, use shielded 6 wire cable 0.75 mm².
Speed pickup
· Use shielded 3 wire cable 0.75 mm².
Shielding
· The cable shielding must be connected to one side only. If connected to the instrument side, then preferably use the same ground as the power supply.
ATEX
If the system is placed in zone 21 or zone 22, it must be connected to a ground as indicated on the drawings: · If metal parts are mounted isolated (by paint, plastic or rubber materials), then an earth strip or other form of grounding must be placed from the weighed part to the fixed part of the weigh frame. · An earth strip must be placed from the fixed part of the weigh frame to the conveyor construction. · The conveyor must be grounded to a central or local earth pin. · The belt must be manufactured of an anti-static material. NOTE: If the weigh frame consists of two parts, earthing must be provided on both sides. Earth leads or any other form of grounding must never affect the weighing function.
2.3 Commissioning
This part should be done by service engineers, who are trained and experienced on the subject.
2.3.1 Mechanical Adjustments
This part is limited to the adjustment (free of mechanical tension), after the transportation security has been removed. If necessary, the load cell will be adjusted mechanically.
2.3.2 Electronics Setup
Refer to the manual of the electronics installed.
2.3.3 Calibration
Perform a test with material. Let the installation run and totalize for a duration of at least 5 minutes. Collect the material during this period and compare the totalized value with a measurement on a static scale. If necessary, adjust the calibration parameter in the electronics. Refer to the manual of the electronics installed.
© Rice Lake Weighing Systems All Rights Reserved
9
Master 211 Belt Scale Weigh Frame
3.0 Maintenance
Regular maintenance is essential to prevent predictable errors or unnecessary out of orders. The supplier does not accept any responsibility for the consequences of maintenance that was not performed according to the recommendations in this section.
3.1 Maintenance
WARNING: It is important to guarantee the safety of personnel during maintenance work and to assure no accidents will happen. Before any work on electrical systems is started, be sure to remove the main power supply. The conveyor must be shut off before any work on the conveyor is started. Any goods on the conveyor must be removed first. No unauthorized persons are allowed in the conveyors working area.
3.1.1 Periodical Maintenance
To keep the belt scale in an optimum condition, it is important to do periodical maintenance. · Check to ensure there is not a build up of debris on the belt. · Inspect the weigh frame for damaged areas and repair immediately to prevent rusting. The method of application and the specifications of the painting may be customer specific and therefore have to be requested. · Regularly perform an Auto Zero and a weight check with certified test weights to determine if the belt scale weighs correctly. For this procedure, refer to the manual of the electronics installed.
3.2 List Parameters for Belt Scale
Complete the information below. Remove this page and store in a secure location.
CUSTOM ORDER NUMBER INSTALLATION REFERENCE TYPE WEIGH FRAME TYPE SPEED PICKUP TYPE ELECTRONICS
DATE FILLED IN BY
Parameter
Nominal capacity (flow) Maximum capacity (flow) Minimum capacity (flow) Ratio weigh frame Number of load cells Load cell capacity (per load cell) Load cell sensitivity Roller distance Inclination angle belt conveyor Belt speed Speed pickup: Pulses per turn Diameter drum or running roller Beltlength per belt turn
Unit
Entered
kg/hr kg/hr kg/hr
Change
kg mV/V mm
° m/s
mm m
10
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4.0 Appendix
Appendix
4.1 Installation and Wiring
Weigh Frame Drawings WBF-S0000 BS211-M0200
Junction Box Drawings JBB-M0200 JBL-ATEX -M0200
Speed Pickup Drawings SPU260-M0200
Wiring Diagrams BS211-E0299
4.2 Declarations
CE-Declaration Model Serial number
BS211 0
ATEX-Declaration Zone Category Temperature
21 II2D IP65 T70oC TA= -10oC / + 40oC
22 II3D IP65 T70oC
4.3 Total Load Cell Build Conversion
The 211 Belt Scale has a lever ratio which must be applied to the total load cell build for proper calibration. Formula: L / E = Lever Ratio E = effort distance from center fulcrum L = load distance from center fulcrum Example: 23.62 / 31.50 = 0.75 x 100 = 75% This reconciles expected mV signal at the integrator with actual mV signal experienced at the effort point of the lever.
Load
Effort
Figure 4-1. Belt Scale Lever Ratio
Fulcrum
© Rice Lake Weighing Systems All Rights Reserved
11
Master 211 Belt Scale Weigh Frame
4.4 Specifications
Standard Material Weight Load Cells
Junction Box Speed Pick-up
Weigh Frame
Steel St.37 or Stainless Steel SS304 / 316
Rollers
Aluminum, Steel St.37 or SS304 / 316
Dependent on the belt width
1 or 2 piece model B3G-9363 (SS/IP66/67)
Capacity 50 to 2500 kg (each)
Power supply 5-15 VDC (stabilized from electronics)
Signal nominal 2 mV/V at 100% load
Model JBB (PC / IP65)
Standard model SPU5020 (Alu / IP66)
Optional model SPU5826 (SS / IP66)
Optional model SPU2160N (Alu / IP64)
ATEX cat. II2D or II3D
Load Cells
1 or 2 piece model BM11-SHB (SS / IP66/68 / ATEX II2D T70°C)
Capacity 50 to 200 kg (each)
or
1 or 2 piece model BM8H-ACB (SS/IP66/68/ATEX II2d T70°C)
Capacity 500 to 2000 kg (each)
Junction box
Model JBL-ATEX (ABS / IP65 / ATEX II2D IP6X T80°C)
Speed Pick-up
Std. model SPU5020
(Alu / IP66 / ATEX II3D IP6X T=120°C)
Opt. model SPU5826
(SS / IP66 / ATEX II3D IP6X T=120°C)
Opt. model SPU7030HSR (SS / IP66 / ATEX II2D T70°C)
12
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© Rice Lake Weighing Systems Content subject to change without notice. 230 W. Coleman St. · Rice Lake, WI 54868 · USA USA: 800-472-6703 · International: +1-715-234-9171
June 23, 2025
www.ricelake.com
PN 165455 Rev B
Documents / Resources
 |
RICE LAKE WEIGHING SYSTEMS MASTER 211 Belt Scale Weigh Frame [pdf] Instruction Manual MASTER 211 Belt Scale Weigh Frame, MASTER 211, Belt Scale Weigh Frame, Scale Weigh Frame, Weigh Frame |