Automated testing system of freezing point, melting point or crystallization point

Abstract

The invention discloses an automated testing system of a freezing point, a melting point or a crystallization point, comprising a heat insulation sleeve pipe, an air sleeve pipe, a sample filling test pipe, a platinum resistor temperature sensor, a collecting card, a temperature data display instrument and a PC terminal; the air sleeve pipe is arranged at the inner part of the heat insulation sleeve pipe; the sample filling test pipe is inserted to the air sleeve pipe; the platinum resistor temperature sensor is inserted to the sample filling test pipe; the collecting card is connected with the platinum resistor temperature sensor; the a temperature data display instrument is connected with the collecting card; the PC terminal is connected with the a temperature data display instrument. The system realizes the automatic detection of the freezing point (crystallization point and melting point) test; the test success rate is improved from 70% to 100%; two samples can be detected synchronously by one person, the analysis efficiency is improved by over 1 time, thereby providing technical support for releasing the contradiction between the saturated detection task and the intense human resource; meanwhile, the system removes the artificial bias of temperature collection; the measurement result uncertainty is better than the manual analysis; the measurement accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of analysis and testing, in particular to an automatic testing system for freezing point, melting point or crystallization point. Background technique [0002] Freezing point (crystallization point, melting point) is an important index to characterize the purity of paraffin, naphthalene, and dinitronaphthalene, and it is a necessary item for re-inspection and pre-production inspection of raw materials in our institute. During the test, two operators are required to cooperate, only one sample can be tested at a time, and the test period is long (5h-6h for a single test). At the same time, it is necessary to manually observe the temperature change of the tested sample for a long time to obtain an accurate freezing point, which is easy to cause visual fatigue. The test of naphthalene crystallization point and paraffin melting point fails, and the probability of retesting is relatively high. The success rate of ...

AI Technical Summary

Problems solved by technology

During the test, two operators are required to cooperate, only one sample can be tested at a time, and the test period is long (5h~6h for a single test)

At the same time, it is necessary to manually observe the temperature change of the tested sample for a long time to obtain an accurate freezing point, which is easy to cause visual fatigue. The test of naphthalene crystallization point and paraffin melting point fails, and the probability of retesting is relatively high. The success rate of the test is about 70%.

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