Rice Lake Benchmark HD Series Manuel utilisateur

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

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 Calibration ...................................................................................................................................... 5

4.0 Troubleshooting .............................................................................................................................. 6

5.0 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.

Specifications subject to change without notice.

Rice Lake Weighing Systems is an ISO 9001 registered company.

November 19, 2014

ii Benchmark HD Series

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 1

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

injury.

Indicates a potentially hazardous situation that, if not avoided could result in serious injury or

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

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 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.

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.

DANGER

WARNING

CAUTION

Important

WARNING

2Benchmark HD Series

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 Capacity Height

30" x 30"/762 mm x 762 mm 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

Installation 3

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).

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

Benchmark HD Deck Cover

Bubble Level Location

4Benchmark HD Series

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.

Calibration 5

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.

6Benchmark HD Series

4.0 Troubleshooting

Symptom Probable Cause Remedy

No display 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 Incorrect load cell cable connections Connect according to manual

Faulty indicator Service the indicator

Erratic weight display 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

Consistently low weights 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

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