Operation
Controller positioning -
The SCT2 temperature controller is supplied with a
detachable temperature probe (Figure2). This
useful feature enables the SCT2 temperature
controller to be positioned away from damaging
fumes.
The temperature controller is factory set such that
the retort clamp is positioned for mounting on a
vertical retort rod. To mount the SCT2 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.
Probe positioning -
For optimum temperature control, ensure the end
of the sensing probe is immersed at least 20mm
deep into the 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 SCT2 control panel. For safety and to
avoid contamination, always wipe the probe clean
prior to placing into holder.
Using the SCT2 temperature controller
The SCT2 can be used in two different modes,
either as a temperature controller (‘control
mode’) or as a digital thermometer (‘monitor
mode’).
To use the SCT2 in control mode
Ensure that the SCT2 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.
US150, US152, UC150 and UC152
Turn the unit on using the On/Off switch at the
side of the unit. The SCT2 will power up in monitor
mode. To turn on the temperature controller in
control mode, turn the heat control clockwise on
the front panel of the hotplate.
US152D and UC152D
Turn the unit on using the On/Off switch at the
side of the unit. The SCT2 will power up in the last
mode used. To change from monitor mode to
control mode, press either the '+' or '-' key on the
SCT2. To turn on the temperature controller in
control mode, turn the heat control clockwise on
the front panel of the hotplate; the LED display will
show "---".
The SCT2 temperature controller in control mode is
indicated by the illuminated amber contact
thermometer indicator on the front panel of the
hotplate (Figure 3). The LED and display will be
visible on the SCT2 temperature controller panel
(Figure 5) and the current temperature of the
medium will be displayed.
Figure 5 - SCT2 temperature controller panel
NB: Turning the heat control clockwise on the
hotplate turns the SCT2 temperature controller
into control mode and cannot be used to set the
hotplate temperature.
To set the temperature in controller mode
Press the + or - key once to instigate the
temperature set point mode. This is indicated by a
flashing LED on the SCT2 temperature controller
display. To select the temperature, use the ‘+’ or ‘ –‘
keys 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
NB: To obtain accurate temperature control,
the minimum temperature set point must be
at least 15°C above the surrounding ambient
temperature.
To use the SCT2 in monitor mode
US150, US152, US152D, UC150, UC152 and
UC152D
Increase
temperature
set point
Decrease
temperature
set point
Thermometer
LED
4
