CHAPTER 3 MAINTENANCE PROCEDURESPioneer™ Balance Service Manual 3-1 Ohaus Corporation www.ohaus.com3.1 PREVENTIVE MAINTENANCEOhaus balances are precision instruments and should be carefully handled, stored in a clean,dry, dust-free area, and cleaned periodically. Follow these precautionary steps:– When a balance has had chemicals or liquids spilled on it, all exterior surfaces should becleaned as soon as possible with warm water on a damp cloth.– Do not leave a mass on the balance when the balance is not in use.– Allow time for the balance to stabilize after moving it from an area which is at a differenttemperature than the area where it is to be operated. Allow one hour for each 5°F or3°C temperature change before using the balance. Following temperature stabilization,allow an additional hour after connecting power to the balance, for the balance tostabilize.3.1.1 Preventive Maintenance ChecklistThe balance should be inspected and checked regularly, as follows:1. Remove the Pan and Pan Support to inspect and clean the area beneath the Pan.2. Clean the outside of the balance using a damp cloth with warm water.CAUTIONDO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE.SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE BALANCE’SFINISH.3. Check the Power Cord for broken or damaged insulation.4. Make a visual inspection for faulty connectors, wiring, and loose hardware.3.2 OPENING THE BALANCEOpening the Pioneer balance varies slightly according to the specific model, as detailed below.Differences are detailed in the text. Use these procedures in order to:– Replace Printed Circuit Boards– Replace bent or broken Flexures– Gain access to the Load Cell for removal, cleaning, parts replacement and alignment.
