Thermo Scientific Thermolyne NCAT F85930, Инструкция по установке и эксплуатации

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This furnace contains refractory ceramic insulation which can produce respirable
fibers and dust when handled. These fibers can cause irritation and can aggravate
preexisting respiratory disease. The International Agency for Research on Cancer
(IARC) has classified refractory ceramic fiber as possibly carcinogenic. After service
refractory ceramic fiber dust may contain crystalline silica, which may cause lung
damage (silicosis) and which has been classed by IARC as a probable carcinogen.
Allow the furnace to cool to room temperature before performing any maintenance
or servicing. “Hot Surface. Avoid Contact.”
To avoid electrical shock, this furnace must always be disconnected from the power
supply prior to maintenance and service.
Perform only maintenance described in this manual. Contact an authorized dealer or
our factory for parts and assistance.
15
Preventive Maintenance and Servicing
Element Plate Construction Use and Care
66 NCAT Asphalt Content Tester Thermo Scientific
Refractory ceramic materials are located in the door, and in the chamber of the furnace. Tests
performed by the manufacturer indicate that there is no significant risk of exposure to dust or
respirable refractory ceramic fiber resulting from operation of the equipment under normal conditions.
However, there may be a risk of exposure to respirable refractory ceramic dust or fiber when repairing
or maintaining the insulating materials, or when otherwise disturbing the materials in a manner which
causes release of dust or fibers therefrom. Through the use of proper handling procedures you can work
safely with these insulating materials and minimize any exposure.
Accordingly, before you repair or replace any insulating materials, or perform any other servicing on
this product which could disturb or cause exposure to dust from insulating materials, you should
consult the appropriate Material Safety Data Sheets (MSDS) for such products with respect to proper
handling and appropriate protective equipment. For additional MSDS, or additional information
concerning the handling of refractory ceramic products, please contact the Customer Service
Department or Thermo Scientific distributor.
Refer servicing to qualified personnel.
Element Plate Construction Use and Care
Your tester contains five element refractory plates containing special helical coiled element embedded
in the refractory. The proprietary element design protects the element wire from harmful asphalt
ignition fumes, arrests coil expansion and contraction and protects the coils from mechanical damage.
The filter element heats the ceramic filter and is controlled by a separate electronic controller. The
sides, top, and bottom elements heat the chamber.
It is normal for the refractory plates to develop hairline cracks in the refractory plates. This does not
necessitate element plate replacement if the mechanical strength is not compromised.
Periodically fire the chamber at 650°C for two hours in the idle mode to clean element plates. Vacuum
chamber floor as needed.