Rice Lake BenchMark Series Installation And Service Manual Download Page 7

Introduction

3

1.3

12", 18" and 24" Models

Larger models in the series use mild steel frames and stainless steel deck covers for light washdown with a damp 
sponge. All models are available with mild steel or optional stainless steel underbody frame construction. The 
standard load cell is a single point load cell. Options include a stainless steel RL1140 load cell for 12" x 12" and 
12" x 18" models and protective stainless steel clamshells for all models using a single point load cell. All load 
cells come with 10 feet of cabling.

Figure 1-3. 12" x 12" With Overloads

These medium-capacity bench scales provide overload protection for the load cell by positive stops located beneath 
each corner of the top frame (see Figure 1-3). These stops are set at the factory for 100% of scale capacity. 
Additional overload protection is provided by an overload screw beneath the load cell to help prevent shock 
damage.

1.4

12" x 18" Stainless Steel

The 12" x 18" model has a stainless steel cover and underbody frame to meet USDA requirements and make it 
ideal for washdown use. The 12" x 18: comes standard with a single point load cell; a stainless steel load cell is 
optional for both the 50 lb and 100 lb models. Extra load cell protection is available with the optional stainless steel 
"clamshell" that encloses the load cell. See Section 5.0 for information about clamshell installation. All load cells 
come with 10 feet of cabling.

These medium capacity bench scales provide overload protection with positive stops located beneath each corner 
of the top frame. These stops are set at the factory for 100% of scale capacity. Additional overload protection is 
provided by an overload screw beneath the load cell to help prevent shock damage. 

Top Frame

Overload Protection Screw

Overload Stops

Summary of Contents for BenchMark Series

Page 1: ...22125 Rev B BenchMark Series Single Point Bench Scales Installation and Service Manual ...

Page 2: ......

Page 3: ...alling Protective Clamshells 11 6 0 Replacement Parts 12 6 1 10 x 10 and 12 x 12 SL and SL HE Series 12 6 2 12 x 12 and 12 x 18 Models Mild Steel 14 6 3 12 x 18 Model Stainless Steel 16 6 4 18 x 18 18 x 24 and 24 x 24 Models Mild and Stainless Steel 18 BenchMark Series Limited Warranty 20 For More Information 21 Technical training seminars are available through Rice Lake Weighing Systems Course de...

Page 4: ...ii Benchmark Series Installation Service Manual Rice Lake continually offers web based video training on a growing selection of product related topics at no cost Visit www ricelake com webinars ...

Page 5: ...ion 1 1 Safety Safety Symbol Definitions Indicates a potentially hazardous situation that if not avoided could result in death or serious injury and includes hazards that are exposed when guards are removed 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 ...

Page 6: ...ales The system uses a bolt and an overload protection spring at each of four loading points beneath the top cover see Figure 1 1 Each spring is set for a specific tension so that it will compress to prevent overload damage If a potentially damaging load is placed on a corner of the scale the spring at that corner compresses When the spring compresses the load is taken off the load cell This elimi...

Page 7: ... Additional overload protection is provided by an overload screw beneath the load cell to help prevent shock damage 1 4 12 x 18 Stainless Steel The 12 x 18 model has a stainless steel cover and underbody frame to meet USDA requirements and make it ideal for washdown use The 12 x 18 comes standard with a single point load cell a stainless steel load cell is optional for both the 50 lb and 100 lb mo...

Page 8: ...point independently adjusted Cable Length 10 ft 3 m 6 wire shielded Rated Output 0 91 mV V Output Impedance 350 Maximum Overload 200 Compensated Temperature Range 10 C 14 F to 50 C 122 F Safe Temperature Range 30 C 22 F to 70 C 158 F Dimensions Capacities Size Capacity Height 10 x 10 254mm x 254mm 5 lb 2 3 kg 3 15 80 mm 10 lb 4 5 kg 3 15 80 mm 20 lb 9 1 kg 3 15 80 mm 30 lb 13 6 kg 3 15 80 mm 12 x ...

Page 9: ...ity charge during weighing operations If powerful enough this charge can travel through the load cell cable to the indicator To prevent this all bench scales should be adequately grounded so that static charges and transient electrical surges can drain directly to ground Recommended practice is to connect the scale base to an AC ground circuit using at least 12 wire All BenchMark scales have eithe...

Page 10: ... With no load on scale place the indicator in its calibration mode and perform a zero calibration 2 Place test weights on platform equal to 70 100 of scale s capacity If several weights are used they distribute them evenly around the platform 3 Perform a span calibration 4 Remove the test weights and check the zero reading If necessary repeat the calibration process See the indicator manual for th...

Page 11: ...r the scale Remove the source of the vibration or adjust digital averaging of indicator to minimize erratic display Scale not level Level the scale Water damage to the load cell or cable Replace the load cell Faulty indicator Service the indicator Loose load cell screws Tighten to correct torque Faulty load cell Test and replace if necessary Consistently low weight Indicator not properly adjusted ...

Page 12: ...e lift up protection screw by screwing it in until it lightly bottoms then back it off 1 4 turn 10 Turn scale right side up Position spacer on load cell then place load plate spider assembly into position Screw in two upper load cell screws Torque to 80 in lb 11 Using an accurate caliper check compressed spring length on four overload springs Figure 5 2 If necessary adjust spring length to specifi...

Page 13: ... Torque to 80 in lbs for 12 x 12 and 12 x 18 scales to 120 in lb for 18 x 18 18 x 24 and 24 x 24 scales 9 Turn scale right side up Position spacer plate on load cell then place top spider into position 10 Screw in four upper load cell screws Torque to 80 in lbs for 12 x 12 and 12 x 18 scales to 120 in lb for 18 x 18 18 x 24 and 24 x 24 scales 11 Connect load cell cable to indicator 12 Recalibrate ...

Page 14: ... x 24 24 x 24 150 lb Load Cell RLPMW16 150 kg 91688 18 x 18 18 x 24 24 x 24 200 lb Load Cell RLPMW16 200 kg 91689 18 x 18 18 x 24 24 x 24 250 lb Load Cell RLPMW16 250 kg 91690 18 x 18 18 x 24 24 x 24 300 lb Load Cell RLPMW16 300 kg 91691 18 x 18 18 x 24 24 x 24 500 lb Load Cell RLPMW16 500 kg 91692 18 x 18 18 x 24 24 x 24 1000 lb Load Cell RLPMW12 1000 kg 91683 Mild Steel Stainless Steel Potted 18...

Page 15: ... Position the clamshell so that no part of it touches the load cell then tighten the lower load cell screws to the specifications given Section 5 1 or Section 5 2 When installing the upper clam shell position it so there is clearance on all sides to prevent any binding problems with the lower clam shell 2 Tighten the upper load cell screws to the required torque 3 When installation is complete res...

Page 16: ...ent Parts 6 1 10 x 10 and 12 x 12 SL and SL HE Series Figure 6 1 10 x 10 and 12 x 12 SL and SL HE Parts Illustration Section BB Enlarged Top View of Scale with cover 18 19 20 21 23 22 26 27 24 25 2 3 4 5 7 8 9 10 11 13 14 15 16 17 A A B B 12 Section AA Enlarged ...

Page 17: ... Screw 8 32 x 1 4 SS 1 16 15408 Rubber Grommet 3 16 ID x 1 2 OD 1 17 16141 Cable Tie 8 1 18 14984 Cap screw 2 lb 20 lb models 4 21947 Cap screw 30 lb model 4 35199 Cap screw 50 lb 100 lb models 4 19 15412 Spring overload 2 lb model 4 21945 Spring overload 5 lb model 4 15416 Spring overload 10 lb model 4 21946 Spring overload 20 lb model 4 21944 Spring overload 30 lb model 4 35086 Spring overload 5...

Page 18: ... 12 x 12 and 12 x 18 Models Mild Steel Figure 6 2 12 x 12 and 12 x 18 Mild Steel Parts Illustration Top View of 12 Scale Series with cover removed to show location of rubber pads 13 14 12 11 9 10 8 7 6 4 3 2 1 19 10 9 17 16 15 Section AA Enlarged 20 A A ...

Page 19: ... X 18 8 26408 Bumper Round Self Adhesive 12 9 15147 Washer Locking 1 4 4 10 14962 Screw Cap 12 X 18 4 11 19089 Spacer Load Cell 1 12 15410 Spirit Level Bubble Plastic 1 13 Load Cell see Table 5 2 1 14 19132 Frame Top 12 X 12 1 19134 Frame Top 12 X 18 1 15 16141 Cable Tie 1 16 15409 Plastic Wire Clamp 1 17 15418 Rubber Grommet 3 16 X 1 2 od 1 19 14918 Overload Protection Screw 8 32 X 1 4 1 20 19139...

Page 20: ... Series Installation Service Manual 6 3 12 x 18 Model Stainless Steel Figure 6 3 12 x 18 Stainless Steel Parts Illustration Top View of Scale with cover removed 4 24 18 15 16 19 21 20 14 11 8 22 3 2 1 17 9 10 12 7 ...

Page 21: ...lar 4 10 14963 Screw Cap 1 4 20 NC X 3 4 4 11 35082 Shim Load Cell 1 12 15410 Level Spirit Bubble 1 14 32797 Spider Top 12 x 18 1 15 16141 Cable Tie 8 Nylon 1 16 15418 Grommet Rubber 1 17 14920 Screw Set 8 32 NC x 1 4 Hex 1 18 15409 Clamp Cable No 8 Hole 1 19 15138 Washer Plain Std No 8 1 20 15132 Washer Lock No 8 Type A 1 21 14862 Screw Mach 8 32 NC x 3 8 1 22 19089 Shim Load Cell 1 24 26408 Bump...

Page 22: ...MW16 Load Cell 1 49774 Frame Bottom 24 X 24 MS RL1260 PMW16 Load Cell 1 49776 Frame Bottom 24 X 24 SS RL1260 PMW16 Load Cell 1 19108 Frame Bottom 18 X 18 MS RL1250 Load Cell 1 19109 Frame Bottom 18 X 18 SS RL1250 Load Cell 1 19110 Frame Bottom 18 X 24 MS RL1250 Load Cell 1 19111 Frame Bottom 18 X 24 SS RL1250 Load Cell 1 19112 Frame Bottom 24 X 24 MS RL1250 Load Cell 1 19114 Frame Bottom 24 X 24 S...

Page 23: ... 24 x 24 MS RL1260 RLPMW16 Load Cell 1 49775 Frame Top 24 x 24 SS RL1260 RLPMW16 Load Cell 1 19120 Frame Top 24 x 24 MS RL1250 Load Cell 1 19121 Frame Top 24 x 24 SS RL1250 Load Cell 1 16 16141 Cable Tie 8 Nylon 1 17 15409 Clamp Cable No 8 Hole 1 18 15418 Grommet Rubber 1 49788 Screw Cap 5 16 18 NC X 1 1 4 Hex MS RL1260 Load Cell 4 49789 Screw Cap 5 16 18 NC X 1 1 4 Hex SS RL1260 Load Cell 4 26667...

Page 24: ...ists 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 nonconformities 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 Buyer is responsibl...

Page 25: ...rs 800 321 6703 International 715 234 9171 Immediate Emergency Service For immediate assistance call toll free 1 800 472 6703 Canadian and Mexican customers please call 1 800 321 6703 If you are calling after standard business hours and have an urgent scale outage or emergency press 1 to reach on call personnel Fax Fax Number 715 234 6967 E mail US sales and product information at prodinfo ricelak...

Page 26: ...22 Benchmark Series Installation Service Manual ...

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Page 28: ...Rice Lake Weighing Systems February 18 2010 PN 22125 Rev B ...

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