JP7166662B2 - Thermometer calibration method and thermometer calibration device - Google Patents

Description

The present invention relates to a calibration method and calibration apparatus for calibrating a thermometer used in an environmental tester.

One example of an environmental tester that performs environmental tests on various samples is a weather resistance tester that evaluates the degree of deterioration of a sample (material) (performs a weather resistance test). Specifically, in this weather resistance tester, in addition to temperature and humidity conditions and water spray, by irradiating various samples with light from a light source (artificial light source) instead of the sun, accelerated environmental conditions (accelerated test environment) is artificially reproduced, and the above-mentioned weather resistance test is performed as an environmental test.

In such a weather resistance tester, a light source such as a xenon arc lamp, a sunshine carbon arc lamp, an ultraviolet carbon arc lamp, a metal halide lamp, or a Equipped with UV fluorescent lamps. A ring-shaped sample frame centered on the light source is provided, and each sample is attached to the sample frame. Under the above-mentioned promoting environmental conditions, tests are conducted for several hours to several thousand hours.

Further, in environmental testers such as weather resistance testers, thermometers of various types are used to obtain temperature information regarding the surface temperature of a sample. For example, Patent Document 1 discloses a method for calibrating such a thermometer.

Japanese Patent No. 4227571

By the way, in such a thermometer calibration method and calibration device, improvement in calibration accuracy is demanded. It is desirable to provide a thermometer calibration method and calibration device that can improve calibration accuracy.

A method for calibrating a thermometer according to an embodiment of the present invention is a method for calibrating a thermometer used in an environmental tester that performs an environmental test on a sample, comprising: a thermometer to be calibrated and a heat flux sensor The thermometer to be calibrated is calibrated using the heat flux value output from the heat flux sensor under predetermined environmental conditions where light from the light source is irradiated for each of is.

A thermometer calibration device according to an embodiment of the present invention is a device for calibrating a thermometer, which is used in an environmental tester for performing an environmental test on a sample. The heat flux value output from the heat flux sensor under predetermined environmental conditions in which the heat flux sensor that outputs the value, the thermometer to be calibrated, and the heat flux sensor are each irradiated with light from a light source. and a calibrating unit for calibrating the thermometer to be calibrated by using the

In the thermometer calibration method and calibration device according to the embodiment of the present invention, when calibrating the thermometer used in the environmental tester, the heat flux sensor outputs under the predetermined environmental conditions The thermometer to be calibrated is calibrated using the heat flux value. In thermometers used in such environmental testers, radiant heat, convective heat, and conductive heat contribute to the determination of the measured temperature, but the heat flux value output from the heat flux sensor is The total heat flow is what is measured, including all convective and conductive heat. Therefore, by using such a comprehensive heat flow measurement value (heat flux value) to calibrate the thermometer to be calibrated, the predetermined environmental conditions are maintained constant. Calibration becomes easier.

Here, the thermometer to be calibrated may be calibrated using a predetermined correspondence relationship between the heat flux value and the temperature measured by the thermometer. In this case, by using the predetermined correspondence relationship, the measured temperature is obtained based on the heat flux value output from the heat flux sensor. The temperature can be used to calibrate the thermometer to be calibrated. As a result, the calibration accuracy of the thermometer is further improved.

In this case, calibration may be performed between the measured temperature obtained from the predetermined correspondence and the measured temperature output from the thermometer to be calibrated. In this case, since calibration is performed using the measured temperature obtained from the predetermined correspondence based on the heat flux value, for example, without using a thermometer as a reference device, Calibration of the thermometer to be calibrated can now be performed. As a result, the calibration work of the thermometer is facilitated, and the convenience at the time of calibration is improved. In the relational expression defining the predetermined correspondence relationship, the heat flux value and the temperature of the back surface of the thermometer (opposite side of the surface irradiated with light from the light source) (rear surface temperature) are variables. , the measurement temperature may be defined as follows.

Further, based on the heat flux value, it is confirmed that the predetermined environmental conditions are met, and the measured temperature output from the thermometer serving as a reference device is a predetermined calibration target under the predetermined environmental conditions. After confirming that the temperature is the same, perform calibration between the measured temperature output from the thermometer that serves as the reference device and the measured temperature output from the thermometer to be calibrated. good too. In this case, based on the heat flux value, the accuracy of the thermometer that serves as a reference (the measured temperature output in the predetermined temperature environment is the predetermined calibration target temperature, and the measurement After confirming that the temperature has not changed over time, the thermometer to be calibrated is calibrated using the thermometer that serves as the reference. In other words, by using a heat flux sensor whose traceability is ensured, it becomes easy to manage the thermometer, which is used as a reference during such calibration. As a result, the convenience of calibration is improved.

Here, the predetermined environmental conditions include, for example, conditions for setting the temperature measured by the thermometer to a predetermined temperature to be calibrated. In this case, the predetermined parameters for setting the predetermined temperature to be calibrated include, for example, at least the illuminance of the light from the light source and the environmental temperature around the thermometer and the heat flux sensor. You may do so. Further, the predetermined parameters may further include, for example, the wind speed of the wind flowing in the surroundings and the rear surface temperature.

In the thermometer, the surface to be irradiated with the light from the light source may be coated with black or white. Moreover, examples of the environmental tester include a weather resistance tester that performs a weather resistance test as the environmental test.

According to the thermometer calibration method and calibration device according to the embodiment of the present invention, the thermometer to be calibrated is calibrated using the heat flux value output from the heat flux sensor under the predetermined environmental conditions. is performed, calibration is facilitated while maintaining the predetermined environmental conditions constant. Therefore, it is possible to improve the calibration accuracy of the thermometer.

1 is a schematic diagram showing a schematic configuration example of a calibration device according to an embodiment of the present invention; FIG. FIG. 2 is a schematic diagram showing a side configuration example near the central portion of the constant temperature bath shown in FIG. 1 ; 2 is a flow chart showing an example (first technique) of a calibration method according to an embodiment; It is a figure showing an example of correspondence etc. between a heat flux value and measured temperature concerning an embodiment. FIG. 11 is a flow chart showing another example (second method) of the calibration method according to the embodiment; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The description will be given in the following order.
1. Embodiment (example of calibrating a thermometer using a heat flux value output from a heat flux sensor)
2. Modification

<1. Embodiment>
[Outline configuration]
FIG. 1 schematically shows a schematic configuration example of a calibration device (calibration device 1) according to an embodiment of the present invention. FIG. 2 schematically shows a side configuration example (YZ side configuration example) in the vicinity of the central portion of the constant temperature bath 10, which will be described later, shown in FIG. Since the calibration method according to one embodiment of the present invention is embodied in the calibration device 1 according to this embodiment, it will also be described below.

The calibration device 1 is a device for calibrating a thermometer used in an environmental tester that performs an environmental test on a sample. As this thermometer, a BPT (black panel thermometer), which will be described later, is used in this embodiment. In other words, the calibration apparatus 1 is designed to calibrate a BPT to be calibrated (calibration BPT 151), which will be described later. An example of the environmental tester is a weatherability tester that performs a weatherability test as the environmental test. In this weather resistance test, samples (specimens) made of various materials placed in a test chamber are subjected to weather resistance tests under accelerated environmental conditions.

As shown in FIGS. 1 and 2, the calibration apparatus 1 contains a light source 11, a temperature sensor 12, a cooling base 13, a photodetector 14, a heat flow chamber 10, and a thermostat 10 whose temperature and humidity can be adjusted. A flux sensor 16 and a wind source 17 are provided. The calibration device 1 also includes an operation display section (information input/output section) 18 and a calibration section (control section) 19, as shown in FIG. In the calibration work described later, for example, as shown in FIG. 1, the heat flux sensor 16 as well as the calibration BPT 151 as a calibration target and the reference BPT 152 as a reference device are placed in the constant temperature chamber 10 ( It is appropriately arranged on a base 13 with a cooling function, which will be described later.

Here, the calibration BPT 151 and the reference BPT 152 described above each correspond to a specific example of the "thermometer" in the present invention. Further, the calibration BPT 151 corresponds to a specific example of the "thermometer to be calibrated" in the present invention, and the reference BPT 152 corresponds to a specific example of the "thermometer serving as a reference" in the present invention. .

As shown in FIGS. 1 and 2, the light source 11 is arranged above the constant temperature bath 10 so as to extend along the X-axis direction. The light source 11 emits light Lout downward (a calibration BPT 151, a reference BPT 152, and a heat flux sensor 16 on a table 13 with a cooling function, which will be described later) in the constant temperature chamber 10 . Such a light source 11 is composed of a lamp light source such as a xenon arc lamp, a sunshine carbon arc lamp, an ultraviolet carbon arc lamp, a metal halide lamp, or an ultraviolet fluorescent lamp.

The temperature sensor 12 is a sensor that measures the temperature inside the constant temperature bath 10 (inside temperature T0). The in-chamber temperature T0 obtained by the temperature sensor 12 in this manner is transmitted, for example, to the calibrating unit 19, which will be described later, by wire or wirelessly.

Here, the above-described in-vessel temperature T0 corresponds to a specific example of the "environmental temperature (surrounding the thermometer and heat flux sensor)" in the present invention.

As shown in FIGS. 1 and 2, the table 13 with cooling function is a table on which the photodetector 14, the calibration BPT 151, the reference BPT 152, and the heat flux sensor 16, which will be described later, are placed, respectively, and has a cooling function. there is

The light receiver 14 is a device that measures the irradiance (illuminance I) of the light Lout emitted from the light source 11, and is arranged on the table 13 with a cooling function as shown in FIG. The light reception data (light reception value, light voltage value) obtained by the light receiver 14 in this manner is also transmitted, for example, to the calibration unit 19, which will be described later, by wire or wirelessly.

As shown in FIGS. 1 and 2, the calibration BPT 151 and the reference BPT 152 are arranged along the X-axis direction on the table 13 with a cooling function together with a heat flux sensor 16, which will be described later. These calibration BPT 151 and reference BPT 152 are, as shown in FIGS. (black panel thermometer). Further, the calibration BPT 151 is a thermometer that is the target (calibration target) of the calibration described above, and the reference BPT 152 is a thermometer that functions as a reference device (standard device) during such calibration.

Here, as shown in FIGS. 1 and 2, the above-described temperature information includes a temperature component (radiant heat component) of the light energy of the light Lout and an environmental temperature component in the constant temperature bath 10 (inside the bath). component due to the temperature T0) and a heat transfer component (components of convective heat and conductive heat) due to the later-described wind Wout flowing in the constant temperature bath 10 . The temperature information obtained by the calibration BPT 151 and the reference BPT 152 in this manner (information indicated by the measured temperature Tm, which will be described later) is also transmitted, for example, to the calibration unit 19, which will be described later, by wire or wirelessly. It's becoming

1 and 2, each of the calibration BPT 151 and the reference BPT 152 has a heat sensing portion (heat sensing element) 150 on the surface S1 side. The heat sensing section 150 is configured using, for example, a bimetal, a platinum resistor, a thermistor, a thermocouple, or the like. Further, the surfaces S1 of these calibration BPT 151 and reference BPT 152 are each coated (painted) in black.

The heat flux sensor 16 is a sensor that measures and outputs a heat flux value q [W/m ² ], as shown in FIG. 13 are arranged side by side. The heat flux value q, which will be described in detail later, is obtained by measuring the overall heat flow including all of the aforementioned radiant heat, convective heat and conductive heat. The heat flux value q obtained by the heat flux sensor 16 in this manner is also transmitted, for example, to the calibration unit 19, which will be described later, by wire or wirelessly.

As shown in FIG. 2, the wind power generation source 17 is a device that generates wind Wout in the constant temperature chamber 10 toward the calibration BPT 151, the reference BPT 152, and the heat flux sensor 16 on the table 13 with cooling function. be. It should be noted that the wind Wout flowing in such surroundings is set to the wind speed Vw, although the details will be described later.

The operation display unit 18 is a portion for inputting/outputting various types of information, and is configured using, for example, a display panel equipped with various types of touch panels. Specifically, for example, in response to various operations by the user (operator) of the calibration device 1, the operation display unit 18 sends an operation input signal (various instructions) to the calibration unit 19 (control unit). control signal) is input. Further, for example, based on the display signal output from the calibration section 19, the operation display section 18 displays various information.

The calibration unit 19 functions as a control unit that controls the operation of the calibration apparatus 1 as a whole, and has a function of performing calibration (automatic calibration) in the calibration BPT 151 described above. As one of such control operations, the calibration unit 19 performs, for example, the light source 11, the temperature sensor 12, the cooling function base 13, the light receiver 14, the heat flux sensor 16, the wind power generation source 17, and the operation display unit 18. It is designed to control the action.

Further, when calibrating the calibration BPT 151 described above, the calibration unit 19 performs calibration as follows, although the details will be described later. That is, the calibration unit 19 calculates the heat flux value q output from the heat flux sensor 16 under predetermined environmental conditions in which the light Lout from the light source 11 is applied to the calibration BPT 151 and the heat flux sensor 16, respectively. It is used to calibrate the calibration BPT 151 . Details of such a calibration method (first and second methods described later) will be described later (FIGS. 3 to 5).

Note that the term “calibration” here refers to the measured temperature Tm (measured temperature Tm1 described later) output from the calibration BPT 151, and the measured temperature Tm obtained by a calibration method (first or second method described later). It means to establish the relationship with (measured temperature Tm0 or measured temperature Tm2 described later).

[Operation and action/effect]
(A. Calibration operation)
Next, with reference to FIGS. 3 to 5 in addition to FIGS. 1 and 2, the calibration operation (calibration methods: first and second methods) performed in the calibration device 1 of the present embodiment will be described in detail. explain. Here, FIG. 3 is a flow chart showing an example (first method) of the calibration method according to the present embodiment. FIG. 4 shows an example of the correspondence Rc and the like between the heat flux value q and the measured temperature Tm according to the present embodiment. Also, FIG. 5 is a flowchart showing another example (second method) of the calibration method according to the present embodiment.

(A-1. Regarding the first method)
First, in the first method shown in FIG. 3, first, the calibration BPT 151 and the heat flux sensor 16 are placed on the table 13 with a cooling function in the constant temperature bath 10 of the calibration device 1 as shown in FIG. are arranged side by side (step S11).

Next, the calibrating device 1 is turned on, and the in-tank temperature T0 and the wind speed Vw of the wind Wout are set to predetermined values (step S12). Then, the illuminance I of the light Lout described above and the back surface S2 of the calibration BPT 151 (the surface opposite to the surface S1, which is the surface to be irradiated with the light Lout), are adjusted so as to become the target temperature (calibration target temperature Tc) for calibration: 1 and 2) are set to predetermined values (step S13). An example of such a calibration target temperature Tc is 63 [°C].

In this manner, a predetermined environmental condition is set for setting the measurement temperature Tm in the calibration BPT 151 to the predetermined calibration target temperature Tc. Here, as parameters for setting such a predetermined environmental condition (predetermined temperature to be calibrated Tc), for example, as described above, the illuminance I and the temperature T0 in the bath (around the calibration BPT 151 and the heat flux sensor 16 environmental temperature), respectively. Further, in the present embodiment, as described above, such parameters further include the wind speed Vw of the wind Wout flowing around the calibration BPT 151 and the heat flux sensor 16, and the rear surface temperature T2. there is Note that other types of parameters may be further included as parameters for performing such settings.

Subsequently, in this first method, the correspondence Rc (see FIG. 4) between the heat flux value q and the measured temperature Tm at the BPT (calibration BPT 151, etc.) is used to output from the heat flux sensor 16 Such a measured temperature Tm [° C.] is obtained from the heat flux value q [W/m ² ] (step S14).

Note that the correspondence relationship Rc shown in FIG. 4 also shows the correspondence relationship between the heat flux value q and the measured temperature Tm, the above-described illuminance I and the rear surface temperature T2. Specifically, under the condition that the in-tank temperature T0 and the wind speed Vw are constant, if the back surface temperature T2 is constant, by changing the illuminance I, the heat flux value q and the measured temperature Tm A proportional relationship between is to be derived. Further, even if the constant back surface temperature T2 is changed, the proportional relationship does not change, and the temperature corresponding to the intercept at the measured temperature Tm is defined by the back surface temperature T2. It should be noted that the magnitude relationship between the exemplary values (Ia to Ie) of the illuminance I shown in FIG. 4 is Ia<Ib<Ic<Id<Ie. Similarly, the magnitude relationship between the exemplary values (T2a to T2e) of the rear surface temperature T2 shown in FIG. 4 is T2a<T2b<T2c<T2d<T2e.

FIG. 4 also shows a relational expression (relational expression for determining the measured temperature Tm from the heat flux value q) that defines such a correspondence Rc. Specifically, this relational expression is defined by the following equation (1) using predetermined constants α, β, and γ. That is, in this relational expression, the measured temperature Tm is defined with the heat flux value q and the rear surface temperature T2 as variables.
Tm=(α×q+β×T2+γ) ……(1)

Next, in this first method, between the measured temperature Tm (Tm0) obtained from the correspondence Rc described above in step S14 and the measured temperature Tm (Tm1) actually output from the calibration BPT 151, Calibration is performed (step S15).

As described above, the calibration in the calibration BPT 151 by the first method shown in FIGS. 3 and 4 is completed.

(A-2. Regarding the second method)
On the other hand, in the second method shown in FIG. 5, first, the calibration BPT 151, the reference BPT 152 and the heat flux sensor 16 are placed in the constant temperature bath 10 of the calibration device 1 as shown in FIG. 13 are set side by side (step S21).

Next, in the same manner as the first method shown in FIG. The illuminance I and the rear surface temperature T2 are each set to predetermined values so as to be Tc (step S13). Thus, in the second method, as in the first method, predetermined environmental conditions are set for setting the measured temperature Tm at the calibration BPT 151 and the reference BPT 152 to the predetermined calibration target temperature Tc. will be

Next, in this second method, based on the heat flux value q output from the heat flux sensor 16, the above-described predetermined environmental conditions (illuminance I, chamber temperature T0 , wind speed Vw and rear surface temperature T2) (step S24). Subsequently, in this second method, it is confirmed that the measured temperature Tm output from the reference BPT 152 is the temperature to be calibrated Tc under the above-described predetermined environmental conditions (step S25).

In this second method, after the above-described confirmations (steps S24 and S25) are performed, the measured temperature Tm (Tm2) output from the reference BPT 152 and the measured temperature Tm (Tm2) output from the calibration BPT 151 Tm1) is calibrated (step S26).

As described above, the calibration in the calibration BPT 151 by the second method shown in FIG. 5 is completed.

(B. Action and effect)
By the way, with thermometers (BPT, etc.) used in environmental testers such as weather resistance testers, the measured temperature output is affected by the material state (surface deterioration, shape difference, etc.). come. Specifically, calibration is performed by comparing and measuring with a thermometer to be calibrated using a thermometer that serves as a reference device that ensures traceability in the heat sensing part within such a thermometer. It looks like this: In other words, due to the structure of the thermometer such as this BPT, the thickness of the painted surface, the difference in adhesion between the heat sensing part and the plate, the difference in heat capacity, etc. fluctuation, etc.) changes. Therefore, if the surface of the thermometer, which serves as a reference device, deteriorates, the measured temperature output from the thermometer, which serves as a reference device, may change even under the same environment. For these reasons, the calibration accuracy of the conventional calibration method may be degraded.

On the other hand, in the present embodiment, when calibrating the calibration BPT 151 described above, the heat flux value q output from the heat flux sensor 16 is used under the predetermined environmental conditions described above. Calibration is done. Here, in the thermometer (BPT, etc.) described above, the radiant heat, convective heat, and conductive heat described above contribute to the determination of the measured temperature Tm, but the heat flux value q output from the heat flux sensor 16 is The total heat flow, including all of these radiant, convective and conductive heats, is what is measured. Therefore, by performing calibration in the calibration BPT 151 using such a comprehensive heat flow measurement value (heat flux value q), calibration is performed while the above-described predetermined environmental conditions are maintained constant. is easier. Therefore, in this embodiment, it is possible to improve the calibration accuracy of the calibration BPT 151 .

Further, in the present embodiment, the calibration BPT 151 is calibrated using the predetermined correspondence Rc between the heat flux value q and the temperature Tm measured at the BPT. That is, by using such a correspondence relationship Rc, the measured temperature Tm can be obtained based on the heat flux value q output from the heat flux sensor 16. Using this, the calibration of the calibration BPT 151 can be performed. As a result, it becomes possible to further improve the calibration accuracy of the calibration BPT 151 .

Furthermore, in the present embodiment (the first method described above), there is , so that the calibration is performed, it becomes as follows. That is, in this case, calibration is performed using the measured temperature Tm obtained from the correspondence Rc based on the heat flux value q. Calibration of the calibration BPT 151 can be performed without using the thermometer (reference BPT 152) that becomes As a result, the calibration work of the calibration BPT 151 is facilitated, and the convenience of calibration can be improved.

In addition, in the present embodiment (second method described above), it is confirmed that the predetermined environmental conditions described above are met based on the heat flux value q, and the measured temperature Tm output from the reference BPT 152 is checked. is the predetermined temperature to be calibrated Tc under the predetermined environmental conditions, then the measured temperature Tm (Tm2) output from the reference BPT 152 and the measured temperature Tm ( Tm1), the calibration is performed as follows. That is, in this case, based on the heat flux value q, the accuracy in the reference BPT 152 (the measured temperature Tm output in a predetermined temperature environment is the predetermined calibration target temperature Tc, and the measured temperature Tm After confirming that no change has occurred, the reference BPT 152 is used to calibrate the calibration BPT 151 . That is, by using the heat flux sensor 16 whose traceability is ensured, it becomes easy to manage the reference BPT 152 used in such calibration. As a result, it is possible to improve the convenience of calibration.

<2. Variation>
Although the present invention has been described above with reference to the embodiments, the present invention is not limited to these embodiments, and various modifications are possible.

For example, in the above embodiment, the configuration (shape, arrangement, number, etc.) of each device in the calibration apparatus was specifically described, but these configurations are limited to those described in the above embodiment. Instead, other shapes, arrangements, numbers, and the like may be used.

Further, in the above-described embodiment, an example in which the "light source" in the present invention is configured using the lamp light source described above has been described. may be used to constitute the "light source" in the present invention. Furthermore, in the above-described embodiment and the like, the case where the surface of the thermometer (the surface to be irradiated with the light Lout from the light source 11) is coated with black was described as an example, but it is not limited to this example. For example, the surface of the thermometer may be coated white. That is, the thermometer is not limited to the BPT (black panel thermometer) described in the above embodiment, and may be a WPT (white panel thermometer). Also, instead of these BPT and WPT, for example, a BST (black standard thermometer) or a WST (white standard thermometer) may be used.

Furthermore, in the above-described embodiment, mainly the method of automatically calibrating the thermometer (calibration BPT 151) to be calibrated in the calibration unit 19 has been described, but the present invention is not limited to this example. That is, for example, the user (operator) of the calibration device 1 may manually perform the calibration of such a thermometer to be calibrated.

In addition, in the above-described embodiment, the method for calibrating the thermometer has been described using a specific method as an example. The meter may be calibrated.

Further, in the above embodiment, a weather resistance tester that performs a weather resistance test as an environmental test was mainly described as an example of an environment tester that uses a thermometer to be calibrated. is not limited to In other words, thermometers used in other types of environmental testing equipment (for example, environmental testing equipment for environmental testing of samples on an exposure table using outdoor sunlight) are also subject to this specification. It is possible to apply the calibration method of the invention.

Furthermore, the series of controls described in the above embodiment may be performed by hardware (circuit) or by software (program). In the case of using software, the software consists of a group of programs for causing a computer (such as a microcomputer) to execute the functions described above. Each program, for example, may be installed in the computer in advance and used, or may be installed in the computer from a network or a recording medium and used.

DESCRIPTION OF SYMBOLS 1... Calibration apparatus, 10... Constant temperature bath, 11... Light source, 12... Temperature sensor, 13... Base with cooling function, 14... Photodetector, 150... Thermal sensing part, 151... Calibration BPT, 152... Reference BPT, 16... Heat flow Flux sensor 17 Wind power generation source 18 Operation display unit 19 Calibration unit Lout Light Wout Wind I, Ia to Ie Illuminance q Heat flux value Vw Wind speed T0 Inside tank Temperature, T2, T2a to T2e... rear surface temperature, Tc... temperature to be calibrated, Tm, Tm0, Tm1, Tm2... measurement temperature, S1... front surface (irradiated surface), S2... rear surface, Rc... corresponding relationship.

Claims (11)

A method for calibrating a thermometer used in an environmental tester for environmental testing of a sample, comprising:
Under predetermined environmental conditions in which the thermometer to be calibrated and the heat flux sensor are irradiated with light from a light source,
Calibrating the thermometer to be calibrated using the heat flux value output from the heat flux sensor;
How to calibrate a thermometer. 2. The method of calibrating a thermometer according to claim 1, wherein the thermometer to be calibrated is calibrated using a predetermined correspondence relationship between the heat flux value and the temperature measured by the thermometer. The method of calibrating a thermometer according to claim 2, wherein calibration is performed between the measured temperature obtained from the predetermined correspondence relationship and the measured temperature output from the thermometer to be calibrated. In the thermometer, when the opposite side of the surface to be irradiated with the light from the light source is the back surface,
In the relational expression that defines the predetermined correspondence relationship,
4. The method of calibrating a thermometer according to claim 2, wherein the measured temperature is defined using the heat flux value and the rear surface temperature as the temperature of the rear surface of the thermometer as variables. Based on the heat flux value, confirming that the predetermined environmental conditions are met,
After confirming that the measured temperature output from the thermometer, which serves as a reference device, is the predetermined temperature to be calibrated under the predetermined environmental conditions,
3. The method according to claim 1, wherein calibration is performed between the measured temperature output from the thermometer serving as the reference device and the measured temperature output from the thermometer to be calibrated. How to calibrate a thermometer. The thermometer calibration method according to any one of claims 1 to 5, wherein the predetermined environmental condition is a condition for setting the temperature measured by the thermometer to a predetermined calibration target temperature. 7. The predetermined parameter for setting the predetermined temperature to be calibrated, comprising at least the illuminance of the light from the light source and the environmental temperature around the thermometer and the heat flux sensor. thermometer calibration method. In the thermometer, when the opposite side of the surface to be irradiated with the light from the light source is the back surface,
8. The method of calibrating a thermometer according to claim 7, wherein the predetermined parameters further include the wind speed of the wind flowing in the surroundings and the rear surface temperature as the temperature of the rear surface of the thermometer. The method of calibrating a thermometer according to any one of claims 1 to 8, wherein a surface of the thermometer to be irradiated with light from the light source is coated with black or white. The thermometer calibration method according to any one of claims 1 to 9, wherein the environmental tester is a weather resistance tester that performs a weather resistance test as the environmental test. A device for calibrating a thermometer used in an environmental tester that performs an environmental test on a sample,
a light source emitting light;
a heat flux sensor that outputs a heat flux value;
The heat flux value output from the heat flux sensor is used under predetermined environmental conditions in which the thermometer to be calibrated and the heat flux sensor are irradiated with light from the light source. and a calibration unit that performs calibration of the thermometer to be calibrated.

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