VERDER CARBOLITE GERO CAF G5, Installation, Operation And Maintenance Instructions

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5.5.2 Cleaning the Window
When cleaning the window, use a suitable cleaning agent. Alternatively an optician
equipped with re-polishing machines can restore the clarity of the windows.
5.5.3 When Replacing the Window
Ensure that the glass is clean and free from dust, grit, chips, scratches and cracks. If the
glass is damaged replace it, a faulty window glass can cause leakage of carbon
monoxide during testing. See section 1.2.
Inspect the condition of the window 'O' ring seal, it must be uniform in shape and
section, and free from cuts, cracks, dust and grit. If the seal is damaged replace it, a
faulty seal can cause leakage of carbon monoxide during testing.
Clean the inside of the viewing window retaining ring and door plug ring. Pay particular
attention to the 'O' ring seal faces, these must also be free from dust, grit, chips and
scratches. A vacuum cleaner is the best method of removing the dust and grit. Take
care not to damage the back face of the door plug during cleaning.
Fit a new window glass gasket, if this gasket is not fitted the window glass will break
when the window retaining ring is tightened.
Fit the window 'O' ring seal onto the window retaining ring. Place the window glass in
position in the door plug ring and re-fit the window retaining ring and tighten the window
retaining ring to finger tight.
Using the tool provided tighten the window retaining ring to seal the viewing window.
Whilst tightening the window retaining ring hold the door plug in position to prevent it
from rotating, the gas inlet hole in the door plug must line up with the gas inlet in the
work tube front seal assembly. See fig 17.
Prior to using the furnace conduct a pressure test of the work tube assembly to ensure
integrity of the work tube and 'O' ring seals, see section 3.3.5.
5.6 Furnace Calibration
This procedure describes the process required to achieve correct calibration and
performance from your CAF G5 furnace. The furnace is calibrated prior to leaving the
factory, but all test standards call for regular checks on calibration. Carbolite Gero
recommend that calibration checks are conducted in accordance with these standards, if
the furnace is found to be out of calibration then the control instrument must be
adjusted (see section 5.7).
5.6.1 Sample Carrier Tiles
To obtain an accurate calibration result the correct sample carrier and tiles supplied with
the furnace must be used.
5.6.2 Sample Preparation
Two types of wire are used to check the furnace calibration:
Gold Wire Melting Point 1063 °C
Palladium Wire Melting Point 1554 °C
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