JPH11224130A - Temperature adjusting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make accurately knowable the temperature inside a sample and to make finely adjustable the temperature even in a test of high temperature dependency by covering the temperature sensitive part of a thermocouple with a material whose heat transmission characteristics are similar to the sample. SOLUTION: At the time of adjusting the temperature inside a thermostatic chamber by using a thermocouple, the temperature sensitive part of the thermocouple is covered with a material whose heat transmission characteristics are similar to that of the sample. Testing method and device for applying this method are not especially limited, however, when it is used for the test with the need of accurately recognizing the temperature of the sample, an effect is further large. For instance, the thermocouple to be used is a type T and the temperature sensitive part is covered with the sample equal to the size (thickness and width) of the sample. The sample is a rubber composition for which carbon black or the like is mixed and the testing device is a viscoelasticity measurement device. Then, when the test is performed by comparing the temperature inside the thermostatic chamber temperature-adjusted by the temperature control method of the thermostatic chamber with a sample temperature measured by the thermocouple buried in the center part of the test sample placed inside the thermostatic chamber, a result becomes the one indicated by the figure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting the temperature in a thermostat used for various tests.

[0002]

2. Description of the Related Art Usually, a thermocouple is used to adjust the temperature in a thermostat. These thermocouples capture the temperature of the atmosphere by using the thermoelectromotive force of the constituent material.

[0003]

However, when performing an actual test, particularly when performing a test having a high temperature dependency, it is very difficult to accurately grasp the temperature of the sample itself, particularly, the internal temperature. is important.

[0004]

Means for Solving the Problems The present invention is a method for solving the above-mentioned problems, and uses a thermocouple to adjust a temperature-sensitive part to a sample when adjusting the temperature in a thermostat. And a method of adjusting the temperature, characterized in that the material is coated with a substance having similar heat transfer characteristics.

There is no particular limitation on the test method and apparatus to which the method of the present invention is applied. However, if the method is used for a test in which it is necessary to know the temperature of a sample accurately, the effect will be even greater.

[0006] The material of the thermocouple is not particularly limited, and a commonly used type K, J, T or the like defined in JIS C1602-1981 can be appropriately used.

[0007]

EXAMPLE 1 The thermocouple used in this test was of type T, and its temperature-sensitive portion was covered with a sample having the same size (thickness and width) as the sample. The sample is a rubber composition containing carbon black and the like, and the test device is a viscoelasticity measuring device.

In order to know the exact temperature in the sample,
The sample used this time has a type T thermocouple embedded therein.

In the test, in the temperature range of the test conditions, the temperature in the thermostat controlled by the temperature control method of the thermostat according to the method of the present invention and the thermoelectric embedded in the center of the test sample placed in the thermostat. This was done by comparing with the sample temperature measured in pairs. The results are shown in FIG. The correlation coefficient is
0.9998.

Similarly, a comparison is made between the temperature in the thermostat controlled by the temperature control of the thermostat not according to the present invention and the sample temperature measured by a thermocouple embedded in the center of the test sample placed in the thermostat. The results obtained are shown in FIG. The correlation coefficient is 0.9
324.

As can be seen from FIGS. 1 and 2, according to the method of the present invention, the temperature in the sample can be measured more accurately.

[0012]

From the above results, according to the method of the present invention,
It can be understood that the temperature in the sample can be accurately grasped, and as a result, the temperature can be finely adjusted even in a test having a high temperature dependency.

[Brief description of the drawings]

FIG. 1 shows a correlation between a temperature in a thermostat controlled by a temperature control method of a thermostat according to the method of the present invention and a sample temperature measured by a thermocouple embedded in a central portion of a test sample placed in the thermostat. FIG.

FIG. 2 shows a correlation between a temperature in a thermostat controlled by a temperature control of a thermostat not according to the present invention and a sample temperature measured by a thermocouple embedded in a central portion of a test sample placed in the thermostat. FIG.

Claims (1)

[Claims] When adjusting the temperature in a thermostat using a thermocouple, a temperature-sensitive portion of the thermocouple is coated with a substance having a heat transfer characteristic similar to that of the sample. Preparation method.