Bibby Sterilin Lenton AF 11/6, Инструкция по установке, эксплуатации и обслуживанию

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EF, AF
6
LF01
3.4 Atmospheres
When an optional gas inlet is fitted there is a label near the inlet saying "INERT GAS ONLY". In
practice
inert or oxidising gases may be used, but not combustible or toxic gases . Chamber
furnaces are not gas tight, so it should be understood that gas usage may be high, and that the
chamber is likely always to contain some air. Residual oxygen levels of 1% are to be expected.
3.5 Control at Low Temperatures
If the furnace is to be used at temperatures much lower than its design maximum, control stability
can often be improved by reducing the power limit. Remember to make a record of the original
setting before altering the power limit. Example: It is desired to run the furnace at 300°C. The
normal control settings can be expected to cause excessive overshoot as the furnace reaches
temperature. Try a setting of 40%, which should greatly reduce this overshoot. Experiment may be
required to achieve a good result; avoid power limits below about 30%, as control accuracy falls
off at such levels. Note that setting the value to zero prevents the furnace from heating.
3.6 Operator Safety
The furnace incorporates a safety switch which interrupts the heating element circuit when the
door is opened. This prevents the user touching a live heating element, but also prevents the
furnace from heating up if the door is left open. The operation of this switch should be checked
periodically – see section 4.1.2.