Chapter 10 Maintenance & Cleaning; Thermocouple Replacement - Thermo Scientific STF55433 Installation And Operating Manual

Lindberg/blue m 1500c general-purpose tube furnaces
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1500°C Tube Furnace
Maintenance & Cleaning
CAUTION : Maintenance should only be performed by trained personnel.
WARNING : Disconnect furnace from main power before attempting any
maintenance to furnace or its controls.
WARNING : Use appropriate Personal Protective Equipment (PPE) per local
protocols.
WARNING : When installing, maintaining or removing the refractory insulation, the
following precautions will minimize risk of airborne dust and ceramic fiber:
Keep personnel not involved in maintenance out of the area.
Use a good vacuum to clean area and equipment. Do not use compressed air.
Use NIOSH high efficiently respirator (3M #8710 or equivalent).
Wear long sleeve clothing, gloves, hat and eye protection to minimize skin and eye
contact. Do not wear contact lenses.
Thoroughly wash self after work is complete.
Launder work clothing separate from other clothes and thoroughly clean laundering
equipment after use. If clothing contains a large amount of dust and/or ceramic
fiber, dispose of rather than clean.
Promptly place used ceramic fiber parts and dust in plastic bags and dispose of
properly.

Thermocouple Replacement

WARNING : Disconnect furnace from main power before attempting any
maintenance to furnace or its controls.
NOTE For optimal performance, the thermocouple should be replaced once a year. In
some situations a more frequent replacement schedule is recommended. S.br Fail on
the controller display indicates a broken thermocouple.
Refer to Figure 9 "Thermocouple Replacement" as you perform the following procedure:
1. Disconnect the main power.
2. Remove the eight corner screws from the back furnace panel. Locate the
thermocouple (item #1 in Figure 9).
Maintenance & Cleaning |
Chapter 10
305435H03 | 10-81

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