The drug melting point apparatus is a game-changer in pharmaceutical research, seamlessly integrating cutting-edge temperature control and high-definition video camera technology. This innovative combination not only delivers precise, stable, and dependable test results but also offers users an exceptionally convenient testing experience. With high-definition video capabilities, users can effortlessly observe the entire sample melting process, facilitating accurate measurement of melting points and distances.

At its core, the drug melting point apparatus leverages capillary tubes specified in the Pharmacopoeia as sample tubes and utilizes the liquid temperature transfer method, controlled by a computer-driven system for precise temperature management. Its operation is marked by reliability, high-precision temperature control, accurate measurements, excellent reproducibility, and user-friendly operation, all in strict adherence to the instrument, utensil, and determination method standards for melting point determination.

Diagnosing Common Issues and Remedies for Drug Melting Point Apparatus

Absence of Readings in the Final Melting Temperature Display Window

Issue Description: The temperature continues to rise, but the ammeter fails to reach the full scale, rendering the attainment of the final fusion temperature impossible.

Analysis: This problem might arise due to the misplacement of the brass tube, blocking the light path, or issues with the light source, such as a broken bulb, incorrect light path alignment, light scattering, or inadequate light energy.

Solution: Adjust the light path to correct the issue.

Ammeter Fails to Reset to Zero After Capillary Insertion

After the drug melting point apparatus is inserted into the capillary, the ammeter should read zero due to the obstruction caused by the medicine in the capillary. When the medicine melts, light passes through the glass capillary, reaching the photocell. The photosensitive output current of the photocell leads to the final melting display and resets the ammeter from zero to full scale. If the ammeter does not reset to zero when the capillary is initially inserted, the device becomes unusable.

Potential Causes for Ammeter Not Resetting to Zero:

Foreign objects in the brass tube where the capillary is placed; remove foreign matter using a thin copper wire, typically caused by broken glass capillaries.

Inadequate resistance; adjust the zero setting using the knob.

Abnormal Temperature Increase After Initial Temperature Setting

Various factors can lead to abnormal temperature fluctuations after pressing the initial temperature setting button, including issues with the temperature sensing element, digital wheel for setting initial temperature, and circuit board components.

Blown Fuse

A blown fuse signifies excessive current flow, often the result of a circuit short-circuit. To rectify this, ensure the load resistance is normal, confirm there are no short circuits in the filter capacitor, and, if required, replace the rectifier diode of the heating circuit power supply with a component of identical parameters.

Anomalies in Measured Values

Anomalies in measured values can be addressed through calibration with standard samples and repeated adjustments. Often, this discrepancy arises when users employ a new capillary from a different batch.

Heating Table Fails to Heat

A non-heating heating table may result from a blown heating wire, fuse, or damaged SCR (Silicon Controlled Rectifier). In the event of a blown heating wire, it can be repaired by rewinding the wire with a 0.3 mm diameter nickel-chromium wire, inserting a 0.5 mm-thick mica paper in between. Alternatively, an electric iron core's heating wire and insulating mica paper can be used. When the SCR is damaged, it must be replaced as it controls the heating current's magnitude by varying the conduction angle.

In conclusion, through understanding advanced technology and thorough troubleshooting guidance of the melting point apparatus, enhance the accuracy and efficiency of drug melting point analysis, further advancing pharmaceutical research and development.