OHAUS SD Series, Service Manual

CHAPTER 3  MAINTENANCE PROCEDURES 

3.1   PREVENTIVE MAINTENANCE 

CAUTION! 

DO NOT ATTEMPT TO REMOVE THE TOP OF THE BASE ON SMALLER  
SD MODELS.  THE BASE AND LOAD CELL ARE NOT REPAIRABLE.   
IF A PROBLEM ARISES, ORDER A REPLACEMENT.  OPENING THE BASE 
WILL DESTROY THE INTERNAL ELECTRONIC COMPONENTS. 

Note: 

 On larger models (SD75L and SD200L) the platform can be removed 

without destroying the internal electronic components.  However, no parts of the 
base are designed to be repaired – merely replaced. 

Ohaus scales should be carefully handled, stored in a clean, dry area, and cleaned periodically.  
Follow these precautionary steps: 

–  When an Indicator has had chemicals or liquids spilled on it, all exterior surfaces should 

be cleaned as soon as possible with warm water on a damp cloth. 

–  Allow time for the scale to stabilize after moving it from an area which is at a different 

temperature than the area where it is to be operated: one hour for each 5°F (2.7°C) 
change. After temperature stabilization, allow an additional 20 minutes after turning the 
scale on, for the scale electronics to stabilize. 

3.1.1   Preventive Maintenance Checklist 

The Indicator should be inspected and checked regularly, as follows: 

1.  Unplug the AC Adapter before cleaning. 

2.  Clean the outside using a damp cloth with warm water. 

CAUTION 

DO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE.   
SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE SCALE’S FINISH. 

3.  Check the Power Cord for broken or damaged insulation. 

4.  Make a visual inspection for faulty connectors, wiring, and loose hardware. 

3.2  REPLACEMENT OF MAJOR COMPONENTS 

The decision to replace any component should only be made after thoroughly diagnosing the 
problem. If, after the replacement of any component, the unit is still non functional and no other 
information on the subject is available in the manual, contact your local Ohaus office or contact 
Ohaus Corporation by visiting www.ohaus.com.  In the United States call Ohaus Aftermarket toll 
free, 800-526-0659 between 8:00 a.m. and 4:00 p.m. EST. 

SD Series Scales Service Manual

3-1

Ohaus Corporation  www.ohaus.com