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4.4.3
Auto, Manual and Off Mode
The controller can be put into Auto, Manual or Off
mode – see next section.
Auto mode is the normal operation where the output
is adjusted automatically by the controller in
response to changes in the measured temperature.
Manual mode means that the controller output
power is manually set by the operator. The input
sensor is still connected and reading the temperature
but the control loop is ‘open’. In manual mode the
MAN beacon will be lit. The power output can be
increased or decreased using the
▼
or
▲
buttons.
!
Manual mode must be used with care. The
power level must not be set and left at a value that
can damage the process or cause over-heating. The
use of a separate ‘over-temperature’ controller is
recommended.
Off mode means that the heating and cooling
outputs are turned off. The alarm outputs will,
however, still be active.