7
This unit is ideal for high throughput applications that require accurate results. It heats
at a fixed ramp rate of 2°C per minute after the set temperature is reached. Touch
pad controls are used to operate the heater, and the temperature values are displayed
on an easy-to-read LCD screen.
1. Prepare the Sample in a Capillary Tube:
a. Ensure the sample is dry.
b. Grind the sample into a fine powder.
c. Press the open end of the capillary tube 2mm deep into the powder to collect
the
sample.
d. When 2mm of the sample has been collected at the open end of the tube,
carefully turn it around and tap the closed end against the table.
e. Ensure the sample is packed at the closed end of the capillary tube.
2. Standby Mode:
a. When the unit is plugged in, the date/time and actual temperature will be
shown on the LCD screen. This is the unit in standby mode.
3. Set Temperature:
a. Press the “Set” button
b. Use the Up and Down Arrows to select a temperature
4. Start Heating to Set Temperature:
a. Press the “Start” button to start heating the oven to the set temperature.
b. The actual temperature will be displayed on the LCD screen.
c. An audible alarm will sound when the set temperature has been reached.
d. If the ramping phase is not initiated within 30 minutes of reaching the set
temperature, the unit will return to the set temperature screen.
e. If the unit remains on the set temperature screen for 30 minutes
without initiating the heating phase, the unit will return to standby mode and
the heater will turn off to prevent indefinite heating.
5. Insert Sample into Oven:
a. Insert 1-3 capillary tube(s) containing the prepared sample(s), closed end
first, into the opening on top of the oven. Wait 30 seconds to stabilize before
continuing to Step 6.
6. Start Ramping to Melt Temperature:
a. After the capillary tubes have been inserted into the oven, press “Start” to
start heating to the melt temperature.
b. The temperature will increase at a fixed ramp rate of 2°C/min until the
user presses “Stop” or until the oven reaches a maximum temperature of
400°C, whichever comes first.
i. If the oven reaches 400°C during the ramping phase, “Ramping Stopped”
will be displayed and the unit will maintain the maximum temperature for
30 minutes. After 30 minutes, it will revert back to the set temperature to
prevent
overheating.
ii. If the “Stop” button is pressed during the ramping phase, the unit will
revert back to the set temperature.
7. Determine the Melting Point of the Sample:
a. Observe the following changes during the ramping phase:
i. Signs of change - Darkening, shriveling, sintering
ii. First signs of liquid formation
iii. Formation of a meniscus
iv. Formation of a completely clear liquid
NOTE: BASIC UNIT DOES NOT HAVE MEMORY CAPACITY. DATA WILL NOT BE
SAVED. RECORDED TEMPERATURES WILL BE ABLE TO BE VIEWED DURING
STEP 8 ONLY.
b. Press “Start” to record the first temperature in the melting range. The oven
will continue heating.
c. Press “Start” to record the second temperature in the melting range. The
oven will continue heating.
d. Press “Start” to record the third temperature in the melting range. The oven
will continue heating.
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