OHAUS EC SERIES Service Manual

Also see for EC Series: Instruction manual Instruction manual

Contents

OHAUS EC SERIES Service Manual Manual pdf 20 page image

3-6CHAPTER 3 SCALE TESTING AND CALIBRATIONCalibration Test (Cont.)3. Upon completion of calibration, the Main PC Board can be further checked using the Simulator tosimulate various weight values. If simulator settings and weight reading on the scale agree, theMain PC Board is functional. If the scale readings vary, or do not agree with readings in Table3-3, the Main PC Board is defective and should be replaced.4. Remove power from the scale and proceed with Section 4.3 and replace the Main PC Board.5. After Main PC Board replacement and assembly of the scale, proceed with Performance Tests inSection 3.6.3.5 TESTING THE BATTERYThe EC Series Scales contains a rechargable, 6.0 Volt, 5.0 Ampere rated, Lead-Acid Battery.3.5.1 Precautions for Battery HandlingWARNING DEATH OR SERIOUS INJURY CAN OCCUR• Charge the battery only with the charger in the scale. Charging the battery under anyother conditions may cause the battery to overheat, emit hydrogen gas, Leak, igniteor burst.• Operate the battery at normal temperature range as specified for the scale.• Do NOT short the battery terminals under any conditions.• Do NOT dispose of the battery in incinerators, or crush or try to open. Dispose of thedefective battery in accordance with local regulations for lead-acid type batteries.CAUTION• Check the battery for any sign of irregularities in appearance. If there is any damageto the case such as cracks, deformation or leakage, replace the battery with a newone.• Do NOT charge the battery with the charger terminals reversed.3.5.2 Battery TestsA new battery when installed in the EC Series Scales will provide many years of useful service. The lengthof service depends upon the type of use of the scale. If left connected to the AC Adapter all of the time, thebattery receives a small charge when the battery voltage is low, service life can be many years.The EC Series Scales can be operated for up to 80 hours per charge. Battery life can be maximized byfrequent charging.1. Upon receipt of the scale, plug in the AC Adapter to a power source and the scale. Allow the batteryto charge. If the battery required a charge, the battery indicator on the front of the LCD display willindicate charging. Green indicates fully charged, yellow indicates a partial charge and red,indicates the battery is nearly discharged.2. Refer to Section 4.1 and remove the Top Housing. Leave the Membrane Switch on the coverconnected to the scale.