JPS6035860Y2 - Thermometer comparison test tank - Google Patents

Description

[Detailed description of the invention] This invention relates to a comparison test tank for comparatively testing thermometers.

In general, contact thermometers such as platinum resistance thermometers and thermocouple thermometers are tested by installing a soaking block in the heating furnace and inserting multiple thermometers into the verification holes to compare them with standard thermometers. was.

In addition, radiation thermometers have a hollow radiation tube installed in the heating furnace, and comparison tests with standard thermometers are performed using this radiation thermometer.

However, in these methods, the contact thermometer and the radiation thermometer must be operated separately using separate heating furnaces, which requires a large amount of equipment space and requires a large amount of power and electricity.
It required a lot of time and effort, and improvements were desired.

In view of the above points, the purpose of this invention is to provide a thermometer comparison test tank that can simultaneously perform comparative tests of a contact thermometer and a radiation thermometer.

FIG. 1 is a front view showing an embodiment of this invention, and FIG. 2 is an explanatory cross-sectional view.

In the figure, 1 is a heat soaking block with a plurality of concentric holes 11 provided in the thick part of the outer periphery and penetrated through the center;
3 is a cylindrical heating element provided close to the inner surface of the center through hole of the heat equalizing block 1, and 3 is a cylindrical heating element provided inside the heating element 2, with an opening 31, 32 that is not penetrated in the axial direction. This thermometer comparison test tank is entirely heated by a heater (heating element) installed in a heating furnace (not shown).

Then, a contact thermometer (not shown) is inserted into the verification hole 11 of the soaking block 1, and the radiation thermometer (not shown) is aimed at the hole 31 of the cavity radiant tube 3. Insert a standard thermometer (not shown).

In this state, the whole is heated by a heating element (not shown), and the heating element 2 between the soaking block 1 and the cavity radiant tube 3 is made to generate heat. Considered to be isothermal.

Then, the measurement values of the contact thermometer of the verification hole 11 and the radiation thermometer aimed at the hole 31 are compared with the measurement value of the standard thermometer of the hole 32, and the verification is performed. As shown in the figure, even if the heating element 2 is provided on the outer periphery of the soaking block 1 having the verification hole 11 provided around the cavity radiant tube 3 having the opening 31, the thermal efficiency will decrease, but the same result will be achieved. It is clear that the effect can be obtained.

As mentioned above, this invention is a thermometer comparison verification tank that allows simultaneous verification of a radiation thermometer using a cavity radiation tube and a contact thermometer using the verification hole of the surrounding heating block. It is.

Therefore, comparative testing of radiation thermometers and contact thermometers can be carried out in as many test tanks, so the space required for the test tanks is small, and power and labor can be saved.

In addition, since a heating element is provided between the heat soaking block and the radiant tube, the temperature can be precisely maintained as a whole, making accurate verification possible, and the heat soaking block can also be made of a large diameter. , contact type thermometers can also be tested easily without removing the terminal box.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are configuration explanatory diagrams showing one embodiment of this invention. 1... Soaking block, 2... Heating element,
3...Cavity radiation tube, 11...Verification hole,
31.32...Open hole.

Claims (1)

[Scope of utility model registration request] A cylindrical heat soaking block with a center penetrating through which a test hole is provided concentrically in the thick part of the outer periphery; a cylindrical heating element provided close to the inner surface of the center through hole of the heat soak block; A cavity radiation tube is provided inside the heating element and has a non-penetrating hole in the axial direction, and a contact thermometer is comparatively verified using the verification hole of the soaking block, and the cavity radiation A thermometer verification tank characterized by performing comparative verification of radiation thermometers using a tube.