Page 17 of 40 M8144
Issue 2.0
7.5.2.
Function key operation. (Fn).
The function key is used for scrolling through the sub
menus of the 9200 model. Each time the Fn key is pressed the IA will enter the next
sequential function screen. The main home screen is F1 from which settings are made
and melts are performed. From F1 press the Fn key and the sub menu F2
‘Stored data’
appears. The F2 sub menu is used for recalling saved melt information together with
selecting data output methods. From F2 press the Fn key to access F3 the sub menu
the settings menu. Within the settings function the time clock can be access for making
time and date setting and adjustments. If you press
the Clear ‘C’ key from F2 or F3 will
return you to F1 home screen.
F1 Operational mode.
7.5.3.
Setting the IA9200 to perform a melt.
You are now asked to
‘Set the Temperature’.
Use the key pad to set the set point temperature. Refer to paragraph 7.2.1 Principals of
Operation. Once the desired set point temperature has been entered press the return
key.
7.5.4. You are now asked to set the ramp rate. The default is 0.2°C/min. To change the ramp
rate use the keypad to enter the new ramp rate value. Press the return key to accept the
default or accept the new ramp rate value.
Note:
The last used ramp rate setting will be remembered and recalled for subsequent
melts. If the IA is powered down and then powered up again the default value of
0.2°C/min will be reinstated.
7.5.5. You are now given the chance to enter a ceiling. The ceiling temperature should only be
set if it is critical to your sample so that it must not be heated above a certain
temperature. The default is 400°C. If there is no requirement for setting a ceiling
temperature press the return key. The IA oven will commence heating to the set point
temperature.
Note:
The last used ceiling setting will be remembered and recalled for subsequent
melts. If the IA is powered down and then powered up again the default value of 400°C
will be reinstated.
Note:
The ceiling temperature cannot be set to less than 5°C of the set point
temperature. If you attempt to make an illegal setting the IA will automatically default to
5°C above the set point temperature.
7.5.6. As the Melt Point apparatus heats up to the set point temperature you will see asterisk
appear across the low half of the display screen indicating the closeness to the set set
point temperature. When the set point temperature has been reached the Melt Point
apparatus will beep three times. It is recommended the user allows time for the oven
temperature to stabilize before commencing with the ramp heating.
7.5.7. Insert you chemicals sample and allow time for the oven to reheat back to the set point
temperature. Press the return key to commence ramping. You will notice a moving icon
indicating that the IA is in ramping condition.
7.5.8. When the first melt is observed press the return key. Up to four melts may be
performed.
See paragraph 7.2.3 ‘Determination of Melt point’. Press the return key
every time a melt is
observed. If less than four melts are required press the ‘Fn’ to move
out of melt storage mode.
7.5.9. You are now asked if you wish to turn off the oven. Press key 1 for yes or key 2 for no. If
you are going to perform subsequent melts then leave the oven on. It will reset back to
the previously set plateau temperature.
