OHAUS EC SERIES Service Manual

Also see for EC Series: Instruction manual Instruction manual

Contents

OHAUS EC SERIES Service Manual Manual pdf 8 page image

1-2CHAPTER 1 INTRODUCTION1.2 TOOLS AND EQUIPMENT1.2.1 Standard Tools and Test EquipmentThe service shop should contain the following equipment:1. Digital Voltmeter (DVM).2. Standard Electronics tool kit.3. Desk magnifier on a stand.4. Grounding mat and clip.5. Razor blades.1.2.2 Special ToolsTo service the Ohaus EC Series Scales, the following equipment is recommended:1. A Load Cell Simulator.2. AC Adapter, 220 V, 60 Hz (US) Ohaus P/N 801200003. AC Adapter, 230 V, 50 Hz (EU) Ohaus P/N 801200014. AC Adapter, 230 V, 50 Hz (GB) Ohaus P/N 801200025. AC Adapter, 240 V, 50 Hz (AU) Ohaus P/N 801200036. AC Adapter, 100 V, 50 Hz (JP) Ohaus P/N 801200047. AC Adapter, 230V, 50 Hz (KR) Ohaus P/N 80120025NOTE: Adapters required for servicing are location dependent.1.3 CALIBRATION MASSES REQUIREDThe masses required to test the EC Series Scales must meet the requirements of ASTM Class 4 or OIMLClass F2. The mass values are listed in Table 1-1.TABLE 1-1. CALIBRATION MASSESMODEL CalibrationCal in kg: Masses TotalingEC3 3kgEC6 6kgEC15 15kgEC30 30kgNote: The EC Scales can be calibrated over a wide range, however, it is recommended that thecalibration mass used is at or near the full capacity of the scale for maximum accuracy.1.4 SERVICE STRATEGYThe repair method for the EC Series Scales is the direct substitution of major assemblies. The availablerepair parts are listed in Table 5-1.The EC Series Scales contains 6 major replaceable assemblies: Top Housing, Membrane Switch, Load CellAssembly with Frame, Lead Acid Rechargeable Battery, Display PC Board with LCD and the Main PCBoard.NOTE: The Load Cell and LCD may also be ordered and replaced separately.This service manual contains sufficient information to isolate the problem, replace the component, testand restore the Scale to original factory specifications.