RICE LAKE RL1200 Portable Beam Scale User Manual

RL1200 Portable Beam Scale
User Manual

© 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 the current and previous manual revisions for awareness of major updates and when the updates took place.

revision history established after this release
A| June 9, 2022| General enhancements to the manual and changed out indicator that is used
| |

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.
Rice Lake continually offers web-based video training on a growing selection of product-related topics at no cost. Visit www.ricelake.com/webinars

Introduction

This manual provides assembly and operating instructions for the RL1200 portable beam scale, which is available in both avoirdupois and metric. Please read all instructions carefully before assembling the scale. This manual covers the installation  and setup of two versions of the RL1200:

• Mechanical assembly of the RL1200
• Mechanical to electronic conversion option for the RL1200

Instructions on assembling the mechanical to the electronic version of the RL1200 can be viewed in Section 4.0 on page 15.
Manuals and additional resources are available from the Rice Lake Weighing Systems website at www.ricelake.com
Warranty information can be found on the website at www.ricelake.com/warranties 

Figure 1-1. RL1200 Portable Beam Scale (Mechanical and Electronic Conversion Models Shown)

1.1 Safety
There are certain precautions that should be taken to prevent personal injury to the user and damage to the scale. Care should be exercised to assure proper assembly and operation of the RL1200. The RL1200 should be assembled only by a trained scale technician. Untrained personnel should not attempt to assemble this scale, nor make any adjustments not specified in these instructions.
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.
Before attempting to operate this unit, make sure every individual who operates or works with this unit has read and understands the following safety information. Please follow these instructions carefully.
Do not drop the scale or subject it to violent shocks.
For accurate weighing, the scale must be placed on a flat, stable surface.
Do not transport the scale while someone is standing on it.
Weight exceeding the maximum capacity (1,000 lb/500 kg) may damage the scale.
Avoid contact with excessive moisture.
Do not allow minors (children) or inexperienced persons to operate this scale.
Do not jump up and down on the scale.
Do not make alterations or modifications to the scale.

Installation

2.1 Unpacking the Scale
Place the unopened box in an open area that has ample room for unpacking the scale. Remove all parts from the box. Parts contained in the shipping box include:
2.2 Repacking
If the RL1200 must be returned for modification or repair, it must be properly packed with sufficient packing materials.
Whenever possible, use the original carton when shipping the scale back.
IMPORTANT: Damage caused by improper packaging is not covered by the warranty.

2.3 Scale Setup
2.3.1 Assemble Wheels onto Frame
Use the following steps to assemble wheels onto the RL1200 frame.

1. It is preferable to set the scale base on a box or other item to keep the scale base up off the floor. Tip the scale base on its side. 

2. Place wheel axles through the holes in the frame.

3. Place the wheels and washers on the axles.
   Washers must be placed on the insides of the wheels next to the scale frame. Wheels must be placed with the extended hub next to scale frame

4. Place the washers and wheels against the frame and insert cotter pins in the holes in the axles. Bend the cotter pin with pliers to prevent it from slipping out.

5. Finish the wheel assembly by securing axles to the frame by securing wheel axle rods with axle locking bolts and lock nuts. Center the axle and tighten the bolt and locknut. 6. Stand the scale base on the floor on its wheels.

6. Stand the scale base on the floor on its wheels.

2.3.2 Attach Pillar to Scale Base
Use the following steps to attach the pillar to the scale base.

1. Screw the pillar rods into the scale base frame in approximately three turns. Ensure ample threads are available to place the beam weight rack and beam cap assembly on the pillar.
2. Place the pillar over the rods with the label facing the scale platform and the serial model label facing outwards as shown in Figure 2-8.
3. To put the connecting steelyard rod into position inside the pillar, raise the long lever under the scale base and hook the lower end of the rod with a loop in the nose iron assembly.
4. Temporarily hang the steelyard rod on the cutout in the pillar as shown. IMPORTANT: If assembling the Mechanical to Electronic version of the RL1200, please proceed to Section 4.0 on page 14 for further assembly instructions.
5. Place the weight rack on top of the pillar with the hook facing as shown.
6. Place the beam cap assembly over the weight rack (facing the same direction as hook and steelyard hook) using acorn bolts and washers and snug the beam cap assembly.
7. Attach the two-loop clamps onto the beam assembly.
8. Take the beam assembly and put the upper end of the steelyard rod through the lower loop clamp on the beam and hook the upper loop clamp to the hook on the weight rack (not shown).
   

2.3.3 Trig Loop Assembly
Use the following steps to assemble the trig loop.

1. Insert the trig loop assembly to the end of the beam assembly. The ball handle should face towards the scale base.
2. Place the trig loop mounting plate on top of trig loop assembly prior to attaching to the beam cap assembly.
3. Use bolts to secure the trig loop assembly to the beam assembly ensuring that trig loop washers are placed between beam cap assembly and the mounting bolts..
4. Ensure the trig loop assembly is centered horizontally. Adjustments can be made by readjusting the beam assembly. The beam must not touch or rub the sides to ensure accurate weighments.
5. Once the trig loop assembly is centered, tighten the beam cap assembly and weight rack to the pillar.
6. Hang the counterpoise assembly from the loop assembly at the tip of the beam.
7. Place the scale on a firm, level surface.
8. Set poise(s) at zero and lock. Release the beam lock. Adjust the back balance assembly to bring the beam to a horizontal position with the tip centered in the trig loop.
9. The zero adjustment screw must be turned clockwise to make the beam go up, and counter-clockwise to make the beam go down.
10. If the beam cannot be vertically centered, weight may be added or removed from the counterpoise assembly as necessary by unscrewing the counterpoise weight and adding an iron shot into the cavity.
11. Hang the counterpoise weights on the weight rack until needed.

Operation

Use the following steps to safely and correctly operate the RL1200 platform scale.

1. With no load on the scale platform, position the sliding poise at zero. Unlock the trig loop. The beam should be centered vertically in the trig loop. Adjust the back balance if necessary (see Figure 2-18 on page 12).

2. Lock the beam with the trig loop lock and place the object to be weighed on the platform. Add counterpoise weights to a value slightly less than the estimated object weight. Release the beam lock.

3. The beam should rise to the top of the trig loop. If it does not rise, reduce the number of counterpoise weights. Move the poise along the beam until the beam balances with the tip centered in the trig loop.

4. When the beam balances, the object weight is the value indicated by the sliding poise, plus the face value of the counterpoise weights used. For example, if there are three pounds of counterpoise weights (equivalent to 300 pounds) and the sliding poise(s) on the beam indicates 54.5 pounds, then the object weighs 354.5 pounds. For a metric
   For example, if there are three 500-gram counterpoise weights (equivalent to 150 kg) and the sliding poise on the beam indicates 10.2 kg, then the object weighs 160.2 kg.

5. After the weight has been determined, lock the beam. Remove the object from the platform. Note the poise may be locked at the desired reading by tightening the poise thumb locking screw if the desired weight is needed repeatedly, such as bagging ingredients.

Mechanical to Electronic Installation Instructions

The conversion from mechanical to electronic weighing is accomplished by a conversion kit. This kit includes:

• 482 Legend series digital weight indicator
• Load cell plus load cell cable
• Pre-drilled mounting bracket
• All necessary conversion hardware

The conversion kit requires no special tooling or equipment. Assembly requires only ordinary hand tools.
Prior assembly of the RL1200 through Step 4, Figure 2-10 on page 9 still applies.
4.1 Unpacking The Conversion Kit
Parts contained in the conversion kit include:

4.2 Indicator and Load Cell Installation
Use the following steps to attach the indicator and load cell to the RL1200.

1. Take the indicator base plate and lay it on its side.

2. Note the orientation of the load cell. Put the 3.5 inch bolt through the long bolt washer and through the top of the indicator base plate. Thread on the locknut to the bottom of the bolt.

3. Screw the eye bolt and locknut into the bottom of the load cell until flush. Tighten the locknut.

4. Place the indicator base plate on the pillar aligning the pillar rods through the base plate holes and handles facing the back of the scale.

5. Hook the steelyard hook through the eye-bolt as shown in Figures 4-3.

6. Push the load cell cable inside the pillar leaving enough slack inside the pillar and draw the cable end up through the hole in the base plate.

7. Tighten the indicator base plate to the pillar by using lock washers and acorn nuts as shown in Figures 4-4.

8. Run load cell cable through the tilt stand on the indicator.
   

9. Set indicator on the base plate and secure with four bolts and lock washers.

10. Wrap the excess cable around cable hooks on the handle.

11. Connect the cable from the load cell through the load cell cable cord grip to connector J1 as shown in Table 4-2.
    J1 Pin| Function
    ---|---
    1| +SIG
    2| -SIG
    3| +SENSE
    4| -SENSE
    5| SHIELD
    6| +EXC
    7| -EXEC
    For 6-wire load cell connections, remove jumpers JP3 and JP4

12.  If using a 6-wire load cell cable (with sense wires), remove jumpers JP3 and JP4 on the A/D board before reinstalling connector J1 (see Figure 4-8). For 4-wire installation, leave jumpers JP3 and JP4 on.

4.3 Final Adjustment, Calibration, and Troubleshooting
Final adjustment, calibration, and troubleshooting of the 482 indicators can be found in the 482 Technical Manual, PN 165124.

Appendix

Check frequently for correct balance with no load on the platform, the poise(s) set at zero, and no counterpoise weights applied.

• Keep the beam locked until the load has been applied to the platform.
• Do not overload the scale.
• Do not oil any part of the scale. Keep the scale as clean and dry as possible at all times.
• Make sure the operation of the scale is checked at regular intervals.

5.1 Specifications

lb or .2 kg increments
Poise| Steel locking screw provided
Pivots and bearings| Precision machined hardened tool steel
Counterpoise weights| 100 lb / 45 kg (1), 200 lb / 90 kg (2), 400 lb / 181 kg (1)
Overall dimensions| 36.13 L (917.7 mm)
25.25 W (641.35 mm)
43 H (1092.2 mm)
Platform dimensions| 18 x 24″ (457.2 x 609.6 mm)
Platform deck height| 6″ without wheels attached, 8″ with the wheels attached
Capacity| 1000 lb / 500 kg
Approximate shipping weight| 230 lb / 104 kg
Warranty| 1 year limited

RL1200 Portable Beam Scale Limited Warranty
Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems be properly installed by a Distributor or Original Equipment Manufacturer (OEM) and 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 one year. RLWS warrants that the equipment sold hereunder will conform to the current written specifications authorized by RLWS. RLWS warrants the equipment against faulty workmanship and defective materials. If any equipment fails to conform to these warranties, RLWS will, at its option, repair or replace such goods returned within the warranty period subject to the following conditions:

• Upon discovery by the Buyer of such nonconformity, RLWS will be given prompt written notice with a detailed explanation of the alleged deficiencies.
• Individual electronic components returned to RLWS for warranty purposes must be packaged to prevent electrostatic discharge (ESD) damage in shipment. Packaging requirements are listed in a publication, Protecting Your Components From Static Damage in Shipment, available from RLWS Equipment Return Department.
• Examination of such equipment by RLWS confirms that the non-conformity actually exists, and was not caused by accident, misuse, neglect, alteration, improper installation, improper repair, or improper testing; RLWS shall be the sole judge of all alleged non-conformities.
• Such equipment has not been modified, altered, or changed by any person other than RLWS or its duly authorized repair agents.
• RLWS will have a reasonable time to repair or replace the defective equipment. The buyer is responsible for shipping charges both ways.
• In no event will RLWS be responsible for travel time or on-location repairs, including assembly or disassembly of equipment, nor will RLWS be liable for the cost of any repairs made by others.

THESE WARRANTIES EXCLUDE ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF  MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. NEITHER RLWS NOR DISTRIBUTOR WILL, IN ANY EVENT, BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
RLWS AND BUYER AGREE THAT RLWS’S SOLE AND EXCLUSIVE LIABILITY HEREUNDER IS LIMITED TO THE REPAIR OR REPLACEMENT OF SUCH GOODS. IN ACCEPTING THIS WARRANTY, THE BUYER WAIVES ANY AND ALL OTHER CLAIMS TO WARRANTY.
SHOULD THE SELLER BE OTHER THAN RLWS, THE BUYER AGREES TO LOOK ONLY TO THE SELLER FOR WARRANTY CLAIMS.
NO TERMS, CONDITIONS, UNDERSTANDING, OR AGREEMENTS PURPORTING TO MODIFY THE TERMS OF THIS WARRANTY SHALL HAVE ANY LEGAL EFFECT UNLESS MADE IN WRITING AND SIGNED BY A CORPORATE OFFICER OF RLWS AND THE BUYER.
© 2022 Rice Lake Weighing Systems, Inc. Rice Lake, WI USA. All Rights Reserved.

• RICE LAKE WEIGHING SYSTEMS\
• 230 WEST COLEMAN STREET
• RICE LAKE, WISCONSIN 54868
• USA

© Rice Lake Weighing Systems Specifications are subject to change without notice.
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
June 7, 2022
www.ricelake.com
PN 157986 Rev A

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