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OHAUS Valor 7000 Service Manual

OHAUS Valor 7000
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SERVICE MANUAL
VALOR
7000
Ohaus Corporation, 7 Campus Drive, Suite 310, Parsippany, NJ 07054 (973) 377-9000
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OHAUS Valor 7000 Specifications

General IconGeneral
Readability0.1 g
Housing MaterialABS Plastic
ProtectionIP54
CalibrationExternal Calibration
Repeatability±0.1 g
Linearity±0.2 g
DisplayLCD
Power SupplyAC Adapter or Rechargeable Battery
ConnectivityRS232
Units of Measurementg, kg, lb, oz
Auto-offYes

Summary

CHAPTER 1 GETTING STARTED

1.2 SERVICE FACILITIES

Requirements for the service area to ensure proper scale maintenance.

1.3 TOOLS AND TEST EQUIPMENT REQUIRED

List of essential tools and equipment for scale servicing.

1.4 SPECIFICATIONS

1.5 SCALE OPERATION – VALOR 7000

1.5.1 OVERVIEW OF THE CONTROLS

Description of the front panel controls and their functions.

1.5.2 Power ON/OFF

Procedure for turning the scale on and off, and battery charging.

1.5.3 Menu Setup

Overview of the scale's menu structure and programmable features.

1.5.4 Menu Navigation

Explanation of how to navigate through the scale's menus.

1.6 LEGAL FOR TRADE

1.6.1 Settings

Steps for setting up the scale for legal for trade applications.

1.6.2 Verification

Procedure for verifying the scale by officials.

1.6.3 Sealing

Methods for sealing the scale to prevent tampering.

CHAPTER 2 DIAGNOSTIC GUIDE

2.1 TROUBLESHOOTING

General troubleshooting information and diagnostic procedures.

2.2 DIAGNOSTIC GUIDE

Guide to help locate and diagnose scale problems based on symptoms.

2.2.2 Checking Load Cells for Trouble

2.2.3 Testing the Printed Circuit Board (PCB)

PCB Voltage Measurements

Measuring excitation voltage and incoming power for PCB diagnostics.

Simulator Testing

Using a simulator to test PCB and load cell functionality.

General Load Test

Testing Main PC Board circuitry by simulating Load Cell voltages.

Calibration Test

Calibrating the scale with a simulator to verify PCB function.

2.2.4 Diagnostic Guide

CHAPTER 3 MAINTENANCE PROCEDURES

3.1 PREVENTIVE MAINTENANCE

Guidelines for routine cleaning, handling, and care of the scale.

3.2 SERVICE STRATEGY

Strategy for replacing scale parts rather than repairing them.

3.3 OPENING THE SCALE

Procedures for opening the scale to access internal components.

3.3.1 Separating the Top and Bottom Housings

3.4 Removing/Replacing the Main PCB and Display PCB

3.5 Removing/Replacing the Load Cell

3.6 Setting the Overload Stops

3.7 Removing/Replacing the Rechargeable Battery

3.8 Replacing the Function Label

CHAPTER 4 TESTING

4.1 TESTING

Procedures for confirming scale specifications after service.

4.2 Operational Test

Procedure for performing an operational test on the scale.

4.3 Segment Display Test

Procedure to test all segments of the scale's display.

4.4 Performance Tests

4.4.1 Precision Test

Measures standard deviation of weight readings for precision.

4.4.2 Repeatability Test

4.4.3 Linearity Test

4.4.4 Off-Center Load Test

4.4.5 Adjusting Off Center Load

CHAPTER 5 PARTS LISTS & DIAGRAMS

5.1 Valor 7000 SCALES: PARTS

Exploded view of Valor 7000 scales and identification of parts.

APPENDIX A. STANDARD CALIBRATION & SETUP

A.1 CALIBRATION

Procedure for standard scale calibration before use and after service.

A.2 SETUP AND CALIBRATION

APPENDIX B. SERVICE CALIBRATION

B.1 Service Menu Structure

Diagram of the service menu hierarchy for authorized personnel.

B.2 Entering the Service Menu

Procedure to access the service calibration menu on the scale.

B.3 Capacity Menu

B.4 Graduation Menu

B.5 Service Span Calibration

B.6 Service Linearity Calibration

B.7 Ramp Menu

B.8 Expand Menu

B.9 End Menu

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