RICE LAKE 211 Master Belt Scale Weigh Frame Instruction Manual

211 Master Belt Scale Weigh Frame
Instruction Manual

211 Master Belt Scale Weigh Frame

©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.

Table i. Revision Letter 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.

Introduction

A belt scale measures a continuous mass flow, which is transported over a belt conveyor. A complete belt scale is composed of a weighframe, 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 weighframes 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.
Manuals are available from Rice Lake Weighing Systems at www.ricelake.com/manuals
Warranty information is available at www.ricelake.com/warranties
1.1 Overview
The weighframe 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 weighframe 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.
1.2 Selection Criteria
After choosing the belt scale model BS211, the dimensions are determined. The capacity of the load cells are calculated based on the maximum belt load, the dead load of the weighframe and the weigh roller.
1.3 Calibration and Test Weight Device
The weighframe 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.
Master 211 Belt Scale
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. Contact any Rice Lake Weighing Systems dealer for replacement manuals.
WARNING
Failure to heed may 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.

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.
** 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.
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 weighframe).
The weighframe must be mounted free of mechanical tensions.
No vibrations in the conveyor should be allowed to carry over to the weighframe. 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 weighframe (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 weighframe.
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 ecommend 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.
Master 211 Belt Scale
2.1 Mechanical Installation
The mechanical installation of a belt scale consists of mounting the weighframe, the speed pickup and the junction box.
2.1.1 Installation Weighframe**
The design and the installation of the weighframe depend on the type of conveyor. The weighframe 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 weighframe.
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 weighframe. Do not weld on the weighframe, to prevent damage to the load cell.
6.  Adjust the rollers in the weighing section (three before, one on and three after the weighframe) 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 weighframe, not further than 0.5 meter from it. The cable glands must point downwards.

2.2 Electrical Installation
The wiring and connections between weighframe, speed pickup and the electronics are shown in the applicable scheme, see Section 4.1 on page 13.
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 weighframe.
• An earth strip must be placed from the fixed part of the weighframe 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 weighframe 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.
Master 211 Belt Scale
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.

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 weighframe 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.

Master 211 Belt Scale
3.2 List Parameters for Belt Scale
Complete the information below. Remove this page and store in a secure location.
ORDER NUMBER………..
INSTALLATION………….
REFERENCE……………………..
TYPE WEIGH FRAME………………….
TYPE SPEED PICKUP……………..
TYPE ELECTRONICS………………..
DATE…………………
FILLED IN BY…………………..

Appendix

4.1 Installation and Wiring
Weighframe 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

ATEX-Declaration

Master 211 Belt Scale
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: E / L = Lever Ratio
E = effort distance from center fulcrum
L = load distance from center fulcrum
Example: 23.62 / 17.65 = 1.33 4.4 Specifications

Standard| |
---|---|---
Material| Weighframe|  Steel St.37 or Stainless Steel SS304 /316
ollers|  Aluminum, Steel St.37 or SS304 / 316
Weight| Dependent on the belt width|
Load Cells| 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|
Junction Box| Model JBB (PC / IP65)|
Speed Pick-up| 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)

© 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
July 18, 2023
www.ricelake.com

References

• Rice Lake Weighing Systems
• Rice Lake Weighing Systems
• Training | Rice Lake Weighing Systems
• Warranties
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• Rice Lake Weighing Systems
• Manuals | Rice Lake Weighing Systems
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• Videos and Webinars | Rice Lake Weighing Systems

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