EN-4
Defender 3000 Indicators Service Manual
WARNING:
Never work in an environment subject to explosion hazards! The housing of the
instrument is not gas tight. (Explosion hazard due to spark formation, corrosion caused by the
ingress of gases).
WARNING:
Electrical shock hazards exist within the housing. The housing should only be
opened by authorized and qualified personnel. Remove all power connections to the unit before
opening.
1.1.2 Intended Use
This instrument is intended for use in light industry. It must only be used for measuring the parameters
described in these operating instructions. Any other type of use and operation beyond the limits of technical
specifications, without written consent from OHAUS, is considered as not intended. This instrument
complies with current industry standards and the recognized safety regulations; however, it can constitute a
hazard in use. If the instrument is not used according to these operating instructions, the intended protection
provided by the instrument may be impaired.
1.2 Service Facilities
To service an indicator, the service area should meet the following requirements:
Must be protected from electrostatic discharge.
Should be temperature controlled and meet the indicator specifications for temperature
environmental requirements. See specifications for temperature range.
Must be free of vibrations such as fork lift trucks close by, large motors, etc.
Must be free of air currents or drafts from air conditioning/heating ducts, open windows, people
walking by, fans, etc.
Area must be clean and air must not contain excessive dust particles.
Work surface must be stable and level.
Work surface must not be exposed to direct sunlight or radiating heat sources.
1.3 Tools and Test Equipment Required
In order to properly service the Indicator, certain special tools and test items are required in addition to
standard electronic tool kits. These items are listed as follows:
