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Setting Plate Temperature: To set a plate temperature the probe must not be plugged into the rear
of the unit. With the probe unplugged, the unit will control the plate surface using a sensor built
into the heater plate and the display will show only the target and actual heater plate surface
temperatures. To set the plate temperature press HEATER and then use the UP, DOWN,
RIGHT, LEFT arrows to set the target temperature value into the display. Then press ENTER.
The unit will now drive the plate surface to the target temperature while toggling the temperature
display between the target and actual plate surface temperatures. When the target temperature is
reached, the display will still toggle between the target and actual temperatures, but the display
will read the same values.
Setting Ramp:
NOTE: IF A RAMP VALUE IS TO BE USED, THE RAMP VALUE MUST
ALWAYS BE SET BEFORE SETTING A TARGET TEMPERATURE.
To set a ramp
value, press the RAMP button. The display to the right of the temperature value will show
º
C/Hr. Use the RIGHT, LEFT, UP, DOWN arrows to set the selected value of ramp rate in
º
C/hr. After a target temperature is set the heater will now drive the temperature from its current
value to the target temperature, either plate or solution, at the rate just instructed. The ramp
value is always in degrees centigrade per hour even if the temperature display has been set to
read in degrees F. The RAMP rate is settable from 1
º
C/Hour to 450
º
C/Hour.
Note that the unit
will heat fastest when not using a ramp rate setting, even 450
º
C/Hour. The ramp rate
should only be used to slow the heating rate.
It is valuable to note that the ramp can be set to go up to a target temperature or down
from a higher temperature to a lower one. However, the unit can never ramp down any
faster than the sample can cool naturally. When ramping down, the heater is used to slow
a cooling rate only.
Setting Stirrer: To set a stirrer speed on single stirrer units, press STIRRER and the use the UP,
DOWN, RIGHT, LEFT arrows to set the value of the stirrer speed into the display. Then press
ENTER. The stirrer will now start to run and will display the speed in RPM on the second line
of the display.
To set the HS65, 5-position stirrer, the user can select to have all stirrers run at the same speed or
each stirrer position can be set to its own individual speed. To select the stirrers to be set use
press the STIRRER SELECT button repeatedly until the dot in the box to the right of the stirrer
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speed display is on the stirrer position to be set. Then enter the value for that position by using
the UP, DOWN, RIGHT, LEFT arrows and press the ENTER button. That will set the selected
stirrer. Repeat this process for each position. To set all stirrers to the same speed use the
STIRRER SELECT button to scroll the dots in the box to the right of the display until all 5 dots
are illuminated. The use the UP, DOWN, RIGHT, LEFT arrows to enter the stirrer speed value,
and press the ENTER button.
Setting Timer: To set a timer value press the TIMER button and use the UP, DOWN, RIGHT,
LEFT arrows to set the value in hours, minutes and seconds. Then press the ENTER button. The