15 A bath that is fitted with a lid or insulating ball blanket gives the best operating conditions. A lid or
ball blanket will prevent vapour loss, heat loss and give better temperature control. If an open bath
is used above 80°C (ie where steam or other readily condensing vapours are present) the operation
of the unit, particularly the digital display on the TE-10D and the TU-20D, may be affected.
Below about 80°C a cover becomes less important but will still give better temperature control.
16 The symbols next to the indicator lamps on the front panel of the thermoregulators have the
following meanings:
: the power indicator
: the heater indicator
: the over-temperature indicator
17 Symbols on the switch have the following meanings:
I : mains switch On
O : mains switch Off
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