Rice Lake BenchMark HE-X User manual

BenchMark® HE-X
Hostile Environment Extreme Bench Scales
Technical Manual
PN 198967 Rev BMay 19, 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
2.0 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Leveling the Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3 Connecting the Load Cell Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.4 Grounding the Scale Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.6 Overload Stop Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.7 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.0 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Load Cell Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.5 Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

BenchMark HE-X
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 reference information to install and wire the BenchMark HE-X Hostile Environment Extreme Bench Scale.
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 and feet away from moving parts.
DANGER
WARNING
CAUTION
IMPORTANT
WARNING

BenchMark HE-X
2 Visit our website www.RiceLake.com
2.0 Installation
This section provides an overview of the BenchMark HE-X installation procedure and grounding information.
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' 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 connector. Use the following color codes to
wire the load cell cable to the indicator.
Connect Sense and Excitation wires together if using 4-wire system without sense leads.
Color Code Function
Green + Excitation
Black - Excitation
White + Signal
Red - Signal
Yellow Shield
Blue + Sense
Brown - Sense
Table 2-1. Load Cell Wiring - 6 Wire
IMPORTANT
Note
Note

Installation
© Rice Lake Weighing Systems ● All Rights Reserved 3
2.4 Grounding the Scale Base
BenchMark HE-X can build up a static electricity charge during weighing operations. If powerful enough, the charge can travel
through the load cell cable to the indicator. The unit should be adequately grounded so static charges and transient electrical
surges can drain directly to the ground. It is recommended to connect the scale base to an AC ground circuit using at least
#12 ga. wire. The BenchMark HE-X has a grounding hole for a grounding screw located on the bottom of the lower frame.
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.
2.6 Overload Stop Adjustment
The scale contains an overload protection screw on the bottom of the scale underneath the load cell and overload protection
stops in the four corners.
Figure 2-1. Overload Protection
1. To check or set the overload screw underneath the load cell, place 125% of capacity on the center of the scale.
2. Using the appropriate hex wrench, screw in the overload protection until it touches the load cell then back it off 1/6 turn.
3. Recheck calibration.
4. To check or set the corner overload stops, load the scale corner with 30% of scale capacity then adjust the screw
under that corner to just touch the top frame then tighten the locking nut if one is used.
If no locking nut is used, apply a drop of an industrial sealing agent to seal threads.
5. Repeat this process for each corner.
Ensure the load cell is not touching the overload protection screw below the load cell with the load on the corner.
Note
Overload StopOverload Stop
Overload Screw
IMPORTANT
Note

BenchMark HE-X
4 Visit our website www.RiceLake.com
2.7 Replacement Parts
See the following information for replacement parts details:
Figure 2-2. Parts Illustration
18
14
1
17
19
8
7
20
15
16
11
10
12 9 13
8
16
5
4
2
6
3

Installation
© Rice Lake Weighing Systems ● All Rights Reserved 5
Item No. Part No. Description Qty.
1 192293 Frame, Top Assembly 12 x 18 HE-X 1
191534 Frame, Top Assembly 18 x 18 HE-X
191815 Frame, Top Assembly 18 x 24 HE-X
191781 Frame, Top Assembly 24 x 24 HE-X
2 192287 Frame, Bottom Bench Scale 12 x 18 SST 50 lb – 100lb HE-X 1
191522 Frame, Bottom Bench Scale 18 x 18 SST 50 lb – 300 lb HE-X
191649 Frame, Bottom Bench Scale 18 x 18 SST 500 lb – 1,000 lb HE-X
191814 Frame, Bottom Bench Scale 18 x 24 SST 50 lb – 300 lb HE-X
191872 Frame, Bottom Bench Scale 18 x 24 SST 500 lb – 1,000 lb HE-X
191770 Frame, Bottom Bench Scale 24 x 24 SST 50 lb – 300 lb HE-X
191807 Frame, Bottom Bench Scale 24 x 24 SST 500 lb – 1,000 lb HE-X
3 191519 Shim, 0.1196 x 2.07 x 2.90 RLPCBC Load Cell SST 2
4 191518 Nut Coupling 1/2-20 NF Hex SST 4
5 191885 Rubber Foot 1/2-200 UNF SST 4
6 87022 Load Cell, SPT RLPCBC-60 50 lb Scale 1
87023 Load Cell, SPT RLPCBC-60 100 lb Scale
87023 Load Cell, SPT RLPCBC-60 150 lb Scale
87024 Load Cell, SPT RLPCBC-60 200 lb Scale
87024 Load Cell, SPT RLPCBC-60 250 lb Scale
87024 Load Cell, SPT RLPCBC-60 300 lb Scale
87025 Load Cell, SPT RLPCBC-60 500 lb Scale
87026 Load Cell, SPT RLPCBC-60 1,000 lb Scale
7 15154 5/16 Lock Washer Set 8
8 49789 Cap Screw 5/16-18NC x 1.25 Hex Head SST 8
9 15409 Clamp, Cable Nylon 1
10 184359 Screw, 8-32 x 1/4 Hex Head 18-8 SST 1
11 15132 Washer, Lock No. 8 Type A Internal Tooth SST 2
12 189464 Screw, 8-32 x 3/8 Hex Head 18-8 SST 1
13 183530 Screw, Cap 1/2-20NF x 0.50 Hex Head SST 1
14 187195 Level, Spirit Bubble Bulls Eye with Flange Plastic 21 x 16.5 x 9.5 mm 1
15 14963 Screw, Cap 1/4-20NC x 3/4 Hex Head SST F593 2
16 15149 Washer Plain 1/4 SST 4
17 105555 Nut, Coupling 1/4-20 x 0.48 Long SST 4
18 186936 Cover, Top Bench Scale 12 x 18 1
19094 Cover, Top Bench Scale 18 x 18
19095 Cover, Top Bench Scale 18 x 24
19096 Cover, Top Bench Scale 24 x 24
19 151269 Screw, Cap 1/4-20 NC x 1-1/4 Hex Head 18-8 SST 4
20 14954 Screw, Cap 1/4-20NC x 3/8 SST 2
Table 2-2. Parts List

BenchMark HE-X
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3.0 Appendix
This section provides additional information about the BenchMark HE-X.
3.1 Options
Optional ball transfer, roller conveyor tops and custom height columns for attaching indicators to the scale are available.
Consult the factory for available options.
3.2 Troubleshooting
For troubleshooting details, see the following information:
Issue Cause Solution
No display on indicator Power disconnected Connect power
Cable cut or disconnected Repair cable
Signal leads incorrectly wired at indicator Connect according to the manual
Indicator display remains at zero Incorrect load cell cable connections
Faulty indicator Service indicator
Erratic weight displays
on indicator
Vibration near the scale Remove the source of the vibration or adjust digital filtering 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 to zero Zero indicator correctly
Scale cover binding Obtain adequate clearance
Overload stops set too high Reset the stops correctly
Indicator not calibrated for scale Calibrate the scale
Faulty load cell Test and replace if necessary
Table 3-1. Troubleshooting

Appendix
© Rice Lake Weighing Systems ● All Rights Reserved 7
3.3 Dimensions
For BenchMark HE-X dimensions see the following information:
Figure 3-1. Dimensions
Capacity Product Dimensions (L x W x H) L1 W1
50 lb (25 kg) 12'' x 18'' x 5.25''
(305 mm x 457 mm x 133 mm)
12.50''
(318 mm)
18.50''
(470 mm)
100 lb (50 kg)
50 lb (25 kg)
18'' x 18'' x 5.25''
(457 mm x 457 mm x 133 mm)
18.75''
(476 mm)
18.75''
(476 mm)
100 lb (50 kg)
150 lb (75 kg)
200 lb (100 kg)
250 lb (125 kg)
300 lb (150 kg)
500 lb (250 kg)
1000 lb (500 kg)
50 lb (25 kg)
18'' x 24'' x 5.25''
(457 mm x 610 mm x 133 mm)
18.75''
(476 mm)
24.75''
(610 mm)
100 lb (50 kg)
150 lb (75 kg)
200 lb (100 kg)
250 lb (125 kg)
300 lb (150 kg)
500 lb (250 kg)
1000 lb (500 kg)
50 lb (25 kg)
24'' x 24'' x 5.25''
(610 mm x 610 mm x 133 mm)
24.75''
(610 mm)
24.75''
(610 mm)
100 lb (50 kg)
200 lb (100 kg)
250 lb (125 kg)
300 lb (150 kg)
500 lb (250 kg)
1000 lb (500 kg)
Table 3-2. Dimensions and Capacities
L1
L
H
W
W1

BenchMark HE-X
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3.4 Load Cell Replacement
Use the following steps to replace load cells:
Figure 3-2. Load Cell Mount Diagram
1. Unplug AC power from indicator and disconnect load cell cable from indicator.
2. Lift off the scale top.
3. Remove the four upper load cell screws with a wrench.
4. Lift off scale top sub-assembly.
5. Remove the four lowers load cell screws with a wrench.
6. The load cell and cable can now be removed from scale.
7. Thread cable of replacement load cell through the scale frame as the unit arrived.
8. Position load cell on shim and screw in four lower load cell screws. Torque to 221 in-lb.
9. Place scale top sub-assembly into position.
10. Screw in four upper load cell screws. Torque to 221 in-lb.
11. Connect load cell cable to indicator.
12. Recalibrate scale (Section 2.5 on page 3).
13. Adjust overload protection (Section 2.6 on page 3).
Load Cell Screw
Top Sub-AssemblyLoad Plate / Spider
Scale Top Cover
(not shown)
Load Cell Screw
Overload Protection Screw

Appendix
© Rice Lake Weighing Systems ● All Rights Reserved 9
3.5 Limited Warranty
Rice Lake Weighing Systems (RLWS) warrants that all RLWS equipment and systems properly installed by a Distributor or
Original Equipment Manufacturer (OEM) 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 three years.
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 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 nonconformity 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 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 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 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.

BenchMark HE-X
10 Visit our website www.RiceLake.com
4.0 Specifications
Load Cell
IP69K stainless steel, hermetically sealed
Available Sizes
12' 'x 18'', 18'' x 18'', 18'' x 24'', 24'' x 24''
Rated Output
0.91 mV/V
Maximum Overload
150 – 200% (capacity dependent)
Overload Protection
Five point, independently adjusted
Cable Length
10' (3 m) – 6 wire shielded
Output Impedance
1000  nominal
Compensated Temperature Range
14°F – 104°F (-10°C – 40°C)
Safe Temperature Range
0°F – 150°F (-18°C – 65°C)
Certifications and Approvals
Load cell is FM approved

230 W. Coleman St. • Rice Lake, WI 54868 • USA
U.S. 800-472-6703 • Canada/Mexico 800-321-6703 • International 715-234-9171 • Europe [phone]
Rice Lake Weighing Systems is an ISO 9001 registered company.
© Rice Lake Weighing Systems Specifications subject to change without notice.
www.ricelake.com
PN 198967 Rev BMay 19, 2020