Rice Lake BenchMark Series Installation manual

Benchmark HD Series
®
Heavy Duty Bench Scale
Installation Manual
93631
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
www.ricelake.com www.ricelake.mx www.ricelake.eu www.ricelake.co.in m.ricelake.com
© Rice Lake Weighing Systems
11/2014
PN XXXXXX
Content
1.0
Introduction..................................................................................................................................... 1
1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Benchmark HD Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0
Installation ...................................................................................................................................... 3
2.1 Unpacking the Benchmark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1
Leveling the Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Connecting the Load Cell Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Grounding the Scale Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.0
4.0
5.0
Calibration ...................................................................................................................................... 5
Troubleshooting .............................................................................................................................. 6
Replacement Parts ......................................................................................................................... 7
5.1 Load Cell Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.2 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Benchmark Series Limited Warranty ....................................................................................................... 10
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 Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
Rice Lake Weighing Systems is an ISO 9001 registered company.
November 19, 2014
i
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.
ii
Benchmark HD Series
1.0
Introduction
This manual provides reference information to install and wire the Benchmark HD series single-point benchtop
scale which is shown in Figure 1-1.
Figure 1-1. Benchmark HD Series Bench Scale
This NTEP-approved bench scale is available in a 30" x 30" and 36" x 36" platform with capacities from 250 to
500 lbs. Both capacities come standard with a potted single point load cell that is environmentally sealed. It also
comes with a standard ten feet of load cell cable. The heavy duty capacity scale is constructed with a 304 stainless
steel cover and mild steel frame construction to withstand many years of rugged use.
1.1
Safety
Safety Signal Definitions:
Indicates an imminently hazardous situation that, if not avoided, will result in death or serious
DANGER injury.
Indicates a potentially hazardous situation that, if not avoided could result in serious injury or
WARNING death, and includes hazards that are exposed when guards are removed.
Indicates a potentially hazardous situation that, if not avoided may result in minor or moderate
CAUTION injury.
Indicates information about procedures that, if not observed, could result in damage to
Important equipment or corruption to and loss of data.
General Safety
Do not operate or work on this equipment unless you have read and understand instructions in the
manual. 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. Proper care is your responsibility.
WARNING
Failure to heed may 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.
Keep hands, feet and loose clothing away from moving parts.
Introduction
1
1.2
Benchmark HD Specifications
Table 1-1 lists the Benchmark HD model specifications.
Load Cell
250 kg for 250 lb; 500 kg for 500 lb
Overload Protection
5 point, independently adjusted
Cable Length
10 ft (3 m) - 6 wire shielded
Output Impendance
350
Maximum Overload
200%
Compensated Temperature Range
-10°C/14°F to +40°C/104°F
Dimensions/Capacities
Size
30" x 30"/762 mm x 762 mm
Capacity
Height
250 lb/125 kg
8.75"/222.25 mm
500 b/250 kg
36" x 36"/914.4 mm x 914.4 mm
250 lb/125 kg
500 lb/250 kg
Table 1-1. Benchmark HD Specifications
2
Benchmark HD Series
2.0
Installation
The following sections explain the installation procedure for the Benchmark HD.
2.1
Unpacking the Benchmark
Immediately after unpacking, visually inspect the Benchmark HD to ensure that the unit is undamaged. The
shipping carton should contain the bench scale and this manual. If the scale was damaged in shipment, notify Rice
Lake Weighing Systems and the shipper immediately.
2.1.1
Leveling the Scale
Place the scale in the desired location. Lift off the deck cover and locate the bubble level (see Figure 2-1).
Benchmark HD Deck Cover
Bubble Level Location
Figure 2-1. Top Plate Removed Showing Bubble Level Location
Adjust the four corner feet until the scale is level and all feet contact the support surface, so that the scale does not
rock. Lock the jam nuts on the feet when the final level is correct.
2.2
Connecting the Load Cell Cable
The Benchmark HD comes with a standard 10 feet of color-coded load cell cable. Do not cut this cable. The load
cell is temperature compensated for an exact length of 10 feet.
See your indicator manual to determine the proper load cell cable input connectors. Use the following color codes
to wire the load cell cable. Once complete, install the top cover for the bench scale back onto the scale.
6-Wire Color Code
Function
Red
+ Signal
White
- Signal
Green
+ Excitation
Grey
- Excitation
Blue
+ Sense
Brown
- Sense
Yellow
Shield
Table 2-1. Load Cell Wiring
Installation
3
2.3
Grounding the Scale Base
Bench scales can build up 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 the ground. A recommended practice is to
connect the scale base to an AC ground circuit using at least #12 wire. All Benchmark series 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.
4
Benchmark HD Series
3.0
Calibration
It is recommended that the scale be “exercised” by loading it to near capacity two or three times before calibration
to be certain that everything is seated. To calibrate the Benchmark HD scale place test weights on the scale
platform equal to 70 - 100% of the scale’s capacity. If several weights are used, distribute them evenly around the
platform.
See your indicator manual for specific indicator calibration procedures.
Calibration
5
4.0
Troubleshooting
Symptom
No display
Probable Cause
Remedy
Power disconnected
Connect power
Cable cut or disconnected
Repair cable
Signal leads incorrectly wired at indicator Connect according to indicator manual
Display stays at zero
Erratic weight display
Consistently low weights
Incorrect load cell cable connections
Faulty indicator
Service the indicator
Vibration near the scale
Remove the source of vibration, or
adjust the digital averaging of the
indicator to minimize the erratic display
Scale is not level
Level the scale
Water damage to the load cell or load
cell cable
Replace the load cell
Faulty indicator
Service the indicator
Loose load cell screws
Tighten the correct torque
Faulty load cell
Test and replace if necessary
Indicator is not properly adjusted to zero
Zero the indicator correctly
Scale deck cover is binding
Obtain adequate clearance
Overload stops set too high
Reset overload stops correctly
Indicator not calibrated for scale
Calibrate
Faulty load cell
Test and replace if necessary
Table 4-1. Troubleshooting Guide
6
Benchmark HD Series
Connect according to manual
5.0
5.1
Replacement Parts
Load Cell Replacement
Use the following steps to replace load cells.
-PBEDFMMTDSFXT
)FYKBNOVU
-FWFMCVCCMF
0WFSMPBEQSPUFDUJPO
-PBEDFMMTDSFXT
4DBMFGPPU
0WFSMPBETDSFXTUPQT
Figure 5-1. 30'' x 30'' or 36'' by 36'' Load Cell Mount
1. Unplug AC power from the indicator and disconnect the load cell cable from the indicator.
2. Lift off the scale top cover and locate the four upper load cell screws. Use a 1/2" wrench to unscrew and
remove those four load cell screws. Refer to Figure 5-1 for their location.
3. Lift off the scale’s top frame.
4. Remove the spacer between the load plate and load cell and set it aside.
5. Loosen the four overload stop screws and turn each screw in one turn to provide ample clearance for the
new load cell.
6. Turn the scale over and back off the overload protection screw one complete turn to provide clearance.
7. Unscrew and remove the lower load cell screws.
8. Remove the bottom shim beneath of the load cell and set it aside.
9. Remove the load cell and cable from the scale.
10. Position the bottom shim directly beneath the load cell and screw in the lower load cell screws. NOTE:
Torque bolts to 200 in-lbs.
11. Turn the scale upright. Position the spacer plate on the load cell, then place the top frame into position.
12. Screw in the four upper load cell screws. NOTE: Torque bolts to 200 in-lbs.
13. Connect the load cell cable to the indicator.
14. Recalibrate the scale as described in Section 3.0 on page 3 of this manual.
15. Adjust the load cell overload protection screws on the bottom of the scale by loading the scale to 125%
capacity. Place this weight on the top cover, centered on the platform. Use a hex wrench to screw in the
load cell overload protection screw until it touches the load cell, the back off 1/6 turn.
16. Recheck calibration.
17. To reset corner overload stop screws, load the top spider over one corner with approximately 30% of scale
capacity.
18. Adjust the screw under that corner to just touch the top frame.
19. Place a drop of a non-permanent, high-strength locking compound such as Loctite® on the thread.
20. Back screw off slightly so it is not touching the top frame.
21. Repeat for each corner.
22. Replace the top cover and re-level the scale if necessary.
Loctite is a registered trademark of Henkel Corporation, U.S.A.
Replacement Parts
7
5.2
Replacement Parts
Figure 5-2. Benchmark HD Assembly Drawing Breakout
8
Benchmark HD Series
The following replacement parts are available for the Benchmark HD Series scale, PN’s 93414, 93415, 93416, and
93417.
Item #
Description
RLWS Part Number
Qty.
Top cover
93775 - 30" x 30"
93768 - 36" x 36"
1
2 & 16
Screw cap, 5/16 - 18NC x 32
49788
8
3 & 15
Lock washer, 5/16 regular
15153
8
4
Top frame
93758 - 30" x 30"
93760 - 36" x 36"
1
5
Self adhesive bumper
26407
30/36
6
Shim, 3/16 x 2 - 3/8 x 3 SST
87358
2
7
Load cell
91690 - 250 lb scale
91692 - 500 lb scale
1
8
Bottom frame
93759
1
9
Hex head bolt, 3/8 - 16NC x 1
14742
4
10
Hex jam nut, 3/8 - 16NC
14649
4
11
Bench scale foot
74585
4
12
Set screw, 1/2 - 20NF x 3/4
15051
1
13
Bubble level
15410
1
14
Label roll
52342
1
1
Table 5-1. Replacement Parts
Replacement Parts
9
Benchmark Series 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 two 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 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. 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.
© 2006 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
10
Benchmark HD Series
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
www.ricelake.com www.ricelake.mx www.ricelake.eu www.ricelake.co.in m.ricelake.com
© Rice Lake Weighing Systems
11/19/2014
PN 93631