YSI CR 4200 Thermoreactor - Manual (Page 20)

Operation CR 4200
20 ba76121e01 09/2012
Note
The reaction temperature is reached when the temperature in the
thermoblock is in a range of ± 1 °C around the adjusted temperature
for two minutes constantly. The control lamp of the thermoblock will
then light up red.
Sequence with
automatic timer
If the start of the timer for the reaction time has been set to automatic
in the SETUP menu (START TIMER:AUTO see section 5.6.3), the
reaction time automatically starts after the reaction temperature has
been achieved. The reaction temperature is kept constant during the
reaction time.
After the reaction time has expired the control lamp flashes red.The
temperature program is finished.
The thermoreactor is in the program selection mode.
As soon as the thermoblock has cooled down to under 50°C, the
control lamp switches itself off.
Sequence with manual
timer
If the start of the timer for the reaction time has been set to manual in
the SETUP menu (START TIMER:MAN. see section 5.6.3), an S is
displayed in front of the nominal reaction time. With this setting the
thermoreactor controls the temperature until the timer for the reaction
time is started by pressing g.
The reaction temperature is kept constant during the reaction time.
The control lamp of the thermoblock will then light up red.
4 Start the displayed temperature program with g.
The control lamp for the selected thermoblock flashes red.
The nominal reaction time (in hours and minutes) appears on
the display.
5 Start the timer for the reaction time with g. The S in front of
the reaction time disappears.