Rice Lake BenchMark MS User manual

BenchMark® MS, SS, HE
Medium-to High-Capacity Bench Scales
Technical Manual
PN 200154 Rev AJune 5, 2020

An ISO 9001 registered company
© 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

Contents
© Rice Lake Weighing Systems ● All Rights Reserved i
Contents
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.
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Leveling the Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Connecting the Load Cell Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3.1 BenchMark MS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3.2 BenchMark SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3.3 BenchMark HE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Grounding the Scale Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.6 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6.1 BenchMark MS 12'' x 12'' and 12'' x 18'' Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6.2 BenchMark 12'' x 18'' Models, SS and HE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.6.3 BenchMark MS, SS and HE, 18'' x 18'' Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6.4 BenchMark MS, SS and HE, 18'' x 24'' Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.6.5 BenchMark MS, SS and HE, 24'' x 24'' Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.0 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3.1 BenchMark MS, BenchMark SS and BenchMark HE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Load Cell Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5 Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

BenchMark MS, SS, HE Series
ii Visit our website www.RiceLake.com
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
© Rice Lake Weighing Systems ● All Rights Reserved 1
1.0 Introduction
This manual provides an overview of technical information for the BenchMark MS, SS and HE medium-to high-capacity bench scales.
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
1.1 Safety
Safety Signal Definitions:
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.
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.
Indicates a potentially hazardous situation that, if not avoided, could result in minor or moderate injury.
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.
Failure to heed could result in serious injury or death.
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.
Before opening the unit, ensure the power cord is disconnected from the outlet.
Keep hands, feet and loose clothing away from moving parts.
DANGER
WARNING
CAUTION
IMPORTANT
WARNING

BenchMark MS, SS, HE Series
2 Visit our website www.RiceLake.com
1.2 Overview
The BenchMark MS is constructed with a mild steel frame with stainless steel top cover. The BenchMark SS and HE are
constructed with a stainless steel frame and top cover. The BenchMark MS and SS contain IP66 aluminum single point load
cells. The BenchMark HE contains an IP69K stainless steel single point load cell.
Overload Protection
The medium-to high-capacity bench scales provide overload protection with positive stops located beneath each corner of the
top frame. The overload 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.
Figure 1-1. Load Cell Mount Overload Stops
Figure 1-2. Overload Stops
Load Cell Screw
Overload Stops Top Frame
Overload Stops Top Frame

Installation
© Rice Lake Weighing Systems ● All Rights Reserved 3
2.0 Installation
This section provides an overview of how to install the BenchMark MS, SS and HE medium-to high-capacity bench scales.
2.1 Unpacking
Immediately after unpacking, visually inspect the scale to ensure that the unit is undamaged. The shipping carton should
contain the bench scale and this manual. If the bench scale was damaged in shipment, notify Rice Lake Weighing Systems and
the shipper immediately.
2.2 Leveling the Scale
1. Place the scale in the desired location that is reasonably level and free of unnecessary vibrations and air currents.
2. Lift off the scale top cover and locate the level bubble.
3. Adjust the four corner feet on the scale base until the level bubble and all feet contact the support surface so the scale
does not rock.
4. Lock the jam nuts on the feet when the final level is correct.
2.3 Connecting the Load Cell Cable
All models come with 10' of color-coded load cell cable.
Do not cut this cable. Cutting this cable voids the warranty.
See the indicator manual to determine the proper load cell cable input connectors. Use the following color codes to
wire the load cell cable to the indicator.
2.3.1 BenchMark MS
Connect Sense and Excitation wires together if using 4-wire system without sense leads.
IMPORTANT
Note
Color Code Function
Green + Excitation
Black - Excitation
Red + Signal
White - Signal
Blue + Sense
Yellow - Sense
Table 2-1. 30-100 lb 12'' x 12'' Load Cell Wiring - 6 Wire
Color Code Function
Green + Excitation
Black - Excitation
Red + Signal
White - Signal
Blue + Sense
Yellow Shield
Brown - Sense
Table 2-2. 50-100 lb 12'' x 18'' Load Cell Wiring - 6 Wire
Color Code Function
Green + Excitation
Black - Excitation
Red + Signal
White - Signal
Blue + Sense
Yellow - Sense
Table 2-3. 50-100 lb 18'' x 18'', 18'' x 24'', 24'' x 24''
Load Cell Wiring - 6 Wire
Color Code Function
Green + Excitation
Black - Excitation
Red + Signal
White - Signal
Blue + Sense
Brown - Sense
Table 2-4. 1000 lb 18'' x 18'', 18'' x 24'', 24'' x 24''
Load Cell Wiring - 6 Wire
Note

BenchMark MS, SS, HE Series
4 Visit our website www.RiceLake.com
2.3.2 BenchMark SS
Connect Sense and Excitation wires together if using 4-wire system without sense leads.
2.3.3 BenchMark HE
Connect Sense and Excitation wires together if using 4-wire system without sense leads.
2.4 Grounding the Scale Base
Bench scales can build up a static electricity 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 either a grounding screw or a hole for such a grounding
screw located on the bottom of the lower frame for this purpose.
2.5 Calibration
It is recommended that the scale be exercised by loading it to near capacity two or three times before calibration to ensure
everything is seated. See the specific indicator manual for the proper calibration procedure.
To calibrate, see the following procedure:
1. With no load on scale, place the indicator in its calibration mode and perform a zero calibration.
2. Place certified calibration weights on platform equal to 70%–100% of scale’s capacity. If several weights are used,
distribute them evenly around the platform.
3. Perform a calibration.
4. Remove certified calibration weights and check the zero reading. If necessary, repeat the calibration process.
See the indicator manual for the specific indicator calibration procedure.
Color Code Function
Green + Excitation
Black - Excitation
Red + Signal
White - Signal
Blue + Sense
Yellow - Sense
Table 2-5. 50 lb – 500 lb 12'' x 18'', 18'' x 18'', 18'’ x 24'', 24'' x 24''
Load Cell Wiring - 6 Wire
Color Code Function
Green + Excitation
Black - Excitation
Red + Signal
White - Signal
Blue + Sense
Brown - Sense
Table 2-6. 1000 l b 18'' x 18'', 18'’ x 24'', 24'' x 24''
Load Cell Wiring - 6 Wire
Note
Color Code Function
Green + Excitation
Black - Excitation
White + Signal
Red - Signal
Yellow Shield
Table 2-7. 50 lb – 200 lb 12'' x 18'', 18'' x 18''
Load Cell Wiring - 5 Wire
Color Code Function
Green + Excitation
Black - Excitation
White +Signal
Red - Signal
Yellow Shield
Blue + Sense
Brown - Sense
Table 2-8. 250 lb – 1000 lb 18'' x 18'', 18'’ x 24'', 24'' x 24''
Load Cell Wiring - 6 Wire
Note
Note

Installation
© Rice Lake Weighing Systems ● All Rights Reserved 5
2.6 Replacement Parts
See the following information for replacement parts details:
2.6.1 BenchMark MS 12'' x 12'' and 12'' x 18'' Models
Figure 2-1. 12'' x 12'' and 12'' x 18'' MS Parts Illustration
BenchMark MS 12'' x 12''
Table 2-9. BenchMark MS 12'' x 12'' Parts List
BenchMark MS 12'' x 18''
Table 2-10. BenchMark MS 12'' x 18'' Parts List
Top View of 12" Scale Series with cover
removed to show location of rubber pads
11
12
10
9
7
8
6
5
4
32
115 14
13
Section AA (Enlarged)
16
AA
Item No. Part No. Description Qty.
1 35128 Foot Bench Scale 1/4-20 x 1-3/16 SST 4
2 14645 Nut, Jam 1/4-20NC Hex SST 4
3 32993 Frame, Bottom, 12'' x 12'' 1
4 14733 Bolt, 1/4-20NC x 1 -1/2 Hex 2
5 19092 Cover, Top, 12'' x 12'' 1
6 26408 Bumper, Round Self Adhesive 12
7 15147 Washer, Locking, 1/4 4
9 19089 Spacer, Load Cell 1
10 15410 Spirit Level Bubble, Plastic 1
11 188678 Load Cell, RL42018A 30 lb Scale 1
188679 Load Cell, RL42018A 50 lb Scale
188681 Load Cell, RL42018A 100 lb Scale
12 19132 Frame, Top, 12'' x 12'' 1
13 15409 Clamp, Cable, No. 8 Hole 1
14 15418 Rubber Grommet, 3/16 x 1/2 od 1
15 14918 Overload Protection Screw, 8-32 x 1/4 1
16 19139 Square Insert Guide 8
Item No. Part No. Description Qty.
Item No. Part No. Description Qty.
1 35128 Foot Bench Scale 1/4-20 x 1-3/16 SST 4
2 14645 Nut, Jam 1/4-20NC Hex SST 4
3 32992 Frame, Bottom, 12'' x 18'' 1
4 14733 Bolt, 1/4-20NC x 1 -1/2 Hex 2
5 19093 Cover, Top, 12'' x 18'' 1
6 26408 Bumper, Round Self Adhesive 12
7 15147 Washer, Locking, 1/4 4
8 14962 Screw Cap, 12'' x 18'' 4
9 19089 Spacer, Load Cell 1
10 15410 Spirit Level Bubble, Plastic 1
11 91730 Load Cell, RLSP4 50 lb Scale 1
91732 Load Cell, RLSP4 100 lb Scale
12 19134 Frame, Top, 12'' x 18'' 1
13 15409 Clamp, Cable, No. 8 Hole 1
14 15418 Rubber Grommet, 3/16 x 1/2 od 1
15 14918 Overload Protection Screw, 8-32 x 1/4 1
16 19139 Square Insert Guide 8
Item No. Part No. Description Qty.

BenchMark MS, SS, HE Series
6 Visit our website www.RiceLake.com
2.6.2 BenchMark 12'' x 18'' Models, SS and HE
Figure 2-2. 12'' x 18'' Stainless Steel Parts Illustration
BenchMark SS 12'' x 18''
Table 2-11. 12'' x 18'' Stainless Steel Parts List
BenchMark HE 12'' x 18''
Table 2-12. BenchMark HE 12'' x 18'' Stainless Steel Parts List
3
18
13
8
5
15
11
20
21
14
12
16
22
10
7
4
6
1
2
9
17
19
Item No. Part No. Description Qty.
1 106462 Screw, Cap 1/4-20NC x 1-1/2 Hex Head SST 2
2 14634 Nut, Lock 1/4-20NC Hex SST 4
3 14645 Nut, Jam 1/4-20NC Hex SST 4
4 14862 Screw, Mach, 8-32 NC x 3/8, SST 2
5 14963 Screw, Cap 1/4-20NC x 3/4 Hex Head SST F593 4
6 15132 Washer, Lock No. 8 Type A Internal Tooth SST 1
7 15138 Washer, Plain STD #8 SST 1
8 15148 Washer, Lock 1/4 Regular Helical Spring SST 8
9 15149 Washer Plain 1/4 SST 4
10 15409 Clamp, Cable, No. 8 Hole 1
11 15410 Level, Spirit Bubble 1
12 15418 Grommet, Rubber 3/16 ID x 7/16 OD 1
13 186226 Frame, Bottom Bench Scale 12 x 18 SST 1
14 186225 Frame, Top Bench Scale 12 x 18 SST 1
15 186936 Top Cover SST Bench Scale 1
16 26408 Bumper, Self Adhesive 3/4 DIA 14
17 35088 Screw, Cap 1/4-20NCX1 Hex 4
18 35128 Foot Bench Scale 1/4-20 x 1-3/16 SST 4
19 35199 Cap Screw 1/4-20NC x 2 Hex Head SST 2
20 43203 Screw, Set 8-32NC x 1/2 SST 1
21 52383 Shim, Load Cell 0.25 x 1 x 1.34 SST 2
22 188679 Load Cell, RL42018A 50 lb Scale 1
188681 Load Cell, RL42018A 100 lb Scale
91730 Load Cell, RLPC6 50 lb Scale
91732 Load Cell, RLPC6 100 lb Scale
Item No. Part No. Description Qty.
Item No. Part No. Description Qty.
1 106462 Screw, Cap 1/4-20NC x 1-1/2 Hex Head SST 2
2 14634 Nut, Lock 1/4-20NC Hex SST 4
3 14645 Nut, Jam 1/4-20NC Hex SST 4
4 14862 Screw, Mach, 8-32 NC x 3/8, SST 2
5 14963 Screw, Cap 1/4-20NC x 3/4 Hex Head SST F593 4
6 15132 Washer, Lock No. 8 Type A Internal Tooth SST 1
7 15138 Washer, Plain STD #8 SST 1
8 15148 Washer, Lock 1/4 Regular Helical Spring SST 8
9 15149 Washer Plain 1/4 SST 4
10 15409 Clamp, Cable, No. 8 Hole 1
11 15410 Level, Spirit Bubble 1
12 15418 Grommet, Rubber 3/16 ID x 7/16 OD 1
13 186226 Frame, Bottom Bench Scale 12 x 18 SST 1
14 186225 Frame, Top Bench Scale 12 x 18 SST 1
15 186936 Top Cover SST Bench Scale 1
16 26408 Bumper, Self Adhesive 3/4 DIA 14
17 35088 Screw, Cap 1/4-20NCX1 Hex 4
18 35128 Foot Bench Scale 1/4-20 x 1-3/16 SST 4
19 35199 Cap Screw 1/4-20NC x 2 Hex Head SST 2
20 43203 Screw, Set 8-32NC x 1/2 SST 1
21 52383 Shim, Load Cell 0.25 x 1 x 1.34 SST 2
22 87029 Load Cell, RLPC6 50 lb Scale 1
87030 L oad Cell, RLPC6 100 lb Scale
Item No. Part No. Description Qty.