OPERATION OF MELTING POINT APPARATUS

• PROCEDURE:

• Make – Polmon

• Connect the instrument to the mains power.
• Switch on the instrument.
• Press function key to set initial temperature.
• The “INT TEMP’ LED blinks
• Set initial temperature.
•  Note: Set the initial temperature to 10°C below the actual melting temperature of the sample.
• Press Function Key to set “° C/min”.
• Press the function key to see the set temperatures.
• Press start key INT TEMP and ° C/min.
• LED blinks one after another with an interval of 2.5 sec.
• Again press starts key to start heating process.
• The “INT TEMP” LED glows continuously and “HEATER” LED glows continuously.
• Heat the bath until the temperature is about 10°C below the expected melting temperature.
• Now insert the capillaries in the bath having pre-dried sample.
• Press function key to start rate of heating (°C/min).
• Adjust the rate of heating to 1° per minute.
• Watch the sample through magnifying lens.
• Press “STORE” key again to store final melting point “T2” LED glows continuously indicating that final melting point temperature (T2) is stored.
• To view initial & final melting point temperature:
• Press “STORE” key ® “T1” blinks and displayed Temp. is initial melting point.
• Press “STORE” key ® “T2” blinks and displayed Temp. is final melting point.
• Press “STORE” key ® displayed temperature is bath temperature.
• Record the melting range of the sample.
• Remove the capillary from the instrument.
• Switch off the instrument.
• Enter the details of the usage of the logbook.

• ANNEXURES: 

Annexure-I
MELTING POINT APPARATUS USER LOGBOOK