Stuart SCT1 Instrucciones De Funcionamiento página 5

5. Operation
5.1 Controller positioning
The SCT1 temperature controller is supplied with
a detachable temperature probe (figure 2). This
useful feature enables the SCT1 temperature
controller to be positioned away from damaging
fumes. The temperature controller is factory set
to be mounted on a vertical retort rod, but can
also be mounted horizontally if required. To
mount the SCT1 temperature controller on to a
horizontal retort rod, ease back the clamp
situated at the rear of the controller sufficiently
to clear the right-angled raised location. Rotate
clockwise by 90° until the clamp snaps back into
the location.
5.2 Probe positioning
For optimum temperature control, ensure the
end of the sensing probe is immersed at least
20mm deep into medium being controlled. The
temperature probe when not in use should be
placed in the probe holder located on the left
hand side of the SCT1 control panel. For safety
and to avoid contamination, always wipe the
probe clean prior to placing into holder.
5.3 Using the SCT1 temperature controller
The SCT1 can be used in two different modes,
either as a temperature controller ('control
mode') or as a digital thermometer ('monitor
mode').
5.4 To use the SCT1 in control mode
To use the SCT1 in control mode, ensure that the
SCT1 temperature controller is connected to the
hotplate. Also ensure the temperature probe is
attached to the controller and immersed in the
medium to be controlled before switching on at
the mains. A green LED will be visible on the
front panel of the hotplate. To turn on the
temperature controller, turn the heat control
clockwise on the front panel of the hotplate. The
SCT1 temperature controller in control mode is
indicated by the illuminated control amber LED
on the front panel of the hotplate. The LED and
display will be visible on the SCT1 temperature
controller panel (figure 5) and the current
temperature of the medium will be displayed.
NB: Turning the heat control clockwise on
the hotplate simply turns the SCT1
temperature controller on ready for use and
cannot be used to set the hotplate
temperature.
5.4 To set the temperature in controller mode
Thermometer
LED
Figure 5: SCT1 Temperature controller panel
Press the + or - key once to instigate the
temperature set point mode. This is indicated by
a flashing LED on the SCT1 temperature
controller display. To select the temperature, use
the '+' or ' –' key to obtain the desired
temperature. To set the temperature, release the
key. The LED will cease flashing once the
temperature has been set. With the probe in the
sample, the thermometer LED will illuminate as
follows:
Green – temperature set point not reached
Amber – liquid at set point
Red – Liquid hotter than set point
N.B To obtain accurate temperature control,
the minimum temperature set point must be
at least 15°C above the surrounding ambient
temperature.
5.5 To use the SCT1 in monitor mode
To use the SCT1 controller in monitor mode,
ensure the hotplate is switched off by turning
the heat control on the hotplate anticlockwise to
the 'OFF' position. Hold down both the '+' and '
–' keys simultaneously on the SCT1 temperature
controller, and turn the heat control 'on'. Once
the digital display illuminates, release the keys on
the SCT1 temperature controller. Monitor mode
will be indicated by a red flashing LED at the top
Increase
temperature
set point
Decrease
temperature
set point
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