Auxiliary device for pressure instrument calibration

Abstract

The utility model relates to the technical field of instrument calibration, and discloses an auxiliary device for pressure instrument calibration, which comprises a calibration table, a calibration connection assembly and an early warning assembly. A pressure source, a pressure standard device and a tested pressure instrument are arranged on the calibration table, and the pressure standard device and the tested pressure instrument are both connected with the pressure source; the calibration connection assembly comprises a calibration terminal and a wiring port, the calibration terminal is arranged on the tested pressure instrument, the wiring port is arranged on the calibration table, and the calibration terminal is electrically connected with the wiring port; and the early warning assembly is arranged on the verification table, is connected with the wiring port, and is used for sending out warning information when the verified pressure instrument reaches an early warning value. According to the invention, the accuracy of the pressure parameter of the measured pressure instrument is ensured, the calibration quality is improved, the actual demand is solved, the technical support is provided for ensuring the quality of the measured data, and the calibration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of instrument calibration, for example to an auxiliary device for pressure instrument calibration. BACKGROUND

[0002] Pressure instrument calibration is usually used for primary instruments in production sites, which are directly installed on some production lines with control requirements, and are mainly used for alarm output after exceeding the upper limit or lower limit of measurement, so as to transmit the alarm signal to other control instruments, and to alarm in time to facilitate personnel to adjust the process or production scheme in time, and to avoid some safety hazards.

[0003] When calibrating pressure instruments with alarm function, it is necessary to judge the on-off state of the contact used for alarm. The simple method is to use a multimeter to determine the on and off, which is not only low in efficiency, but also has certain human bias, and cannot read the up-down switching value in time and accurately, and cannot accurately calculate the set point deviation and switching difference.

[0004] Therefore, it can be seen that how to ensure the accuracy of the pressure parameter, improve the calibration quality, and improve the calibration efficiency is a technical problem to be solved by those skilled in the art.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0006] In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not a general review, nor does it determine the key / important components or delineate the scope of protection of these embodiments, but serves as a prelude to the detailed description below.

[0007] The auxiliary device for pressure instrument calibration provided by the embodiments of the present application ensures the accuracy of the pressure parameter of the measured pressure instrument, improves the calibration quality, solves the actual needs, provides technical support for the quality assurance of measurement data, and is convenient to operate, reliable in performance, can efficiently and quickly complete the calibration work, and improves the calibration efficiency.

[0008] In some embodiments, an auxiliary device for pressure gauge calibration includes a verification table, a calibration connection assembly, and a pre-warning assembly. The verification table is provided with a pressure source, a pressure standard device, and a pressure gauge to be tested, and the pressure standard device and the pressure gauge to be tested are connected with the pressure source; the calibration connection assembly includes a calibration terminal and a terminal port, the calibration terminal is arranged on the pressure gauge to be tested, the terminal port is arranged on the verification table, and the calibration terminal is electrically connected with the terminal port; the pre-warning assembly is arranged on the verification table and connected with the terminal port, and is used to send a warning information when the pressure gauge to be tested reaches a pre-warning value.

[0009] Optionally, the calibration terminal includes an upper limit calibration terminal, a common terminal, and a lower limit calibration terminal, the upper limit calibration terminal, the common terminal, and the lower limit calibration terminal are arranged side by side at the back side of the pressure gauge to be tested, the terminal port includes an upper limit pre-warning interface, a common interface, and a lower limit pre-warning interface, the upper limit pre-warning interface, the common interface, and the lower limit pre-warning interface are arranged on the verification table, and the upper limit calibration terminal is electrically connected with the upper limit pre-warning interface, the common terminal is electrically connected with the common interface, and the lower limit calibration terminal is electrically connected with the lower limit pre-warning interface.

[0010] Optionally, the pre-warning assembly includes an upper limit alarm indicator, a common terminal communication indicator, and a lower limit alarm indicator, the upper limit alarm indicator, the common terminal communication indicator, and the lower limit alarm indicator are arranged on the verification table, and the upper limit alarm indicator is connected with the upper limit pre-warning interface, the common terminal communication indicator is connected with the common interface, and the lower limit alarm indicator is connected with the lower limit pre-warning interface.

[0011] Optionally, the pre-warning assembly further includes an upper limit alarm buzzer and a lower limit alarm buzzer, the upper limit alarm buzzer is connected with the upper limit alarm indicator, and the lower limit alarm indicator is connected with the lower limit alarm buzzer.

[0012] Optionally, the upper limit alarm indicator, the common terminal communication indicator, and the lower limit alarm indicator present different colors when they are on.

[0013] Optionally, the pressure source includes a pressure pump and a pressure regulator, the pressure pump and the pressure regulator are arranged on the verification table, the pressure pump is connected with the pressure standard device and the pressure gauge to be tested, and the pressure regulator is used to adjust the output pressure of the pressure pump.

[0014] Optionally, an assembly groove is formed on the verification table, and the pressure pump is arranged in the assembly groove.

[0015] Optionally, a charging interface is arranged at a lower corner position of one side of the verification table.

[0016] Optionally, a power switch is arranged at an upper corner position of one side of the verification table.

[0017] Optionally, the bottom corner position of the checking table is provided with a vacuum chuck.

[0018] The auxiliary device for pressure gauge calibration provided by the embodiments of the present disclosure can achieve the following technical effects:

[0019] According to the calibration requirements, appropriate pressure points are selected, the pressure source is controlled to perform the operation of increasing and decreasing pressure, and in the case that the pressure gauge under test reaches the pre-warning value, warning information is sent. At this time, the reading of the pressure value can be performed, the calibration of the set point deviation is completed, the accuracy of reading the switching value when the alarm contact is connected and disconnected is ensured by using the auxiliary device, thereby ensuring the accuracy of the pressure parameter of the measured pressure gauge, improving the calibration quality, solving the actual needs, providing technical support for the quality assurance of measurement data, and being convenient to operate, reliable in performance, and capable of efficiently and quickly completing the calibration work and improving the calibration efficiency.

[0020] The foregoing general description and the following description are merely exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments, elements with the same reference numerals in the drawings are shown as similar elements, the drawings do not constitute proportional limitations, and wherein:

[0022] Figure 1 is a structural schematic diagram of an auxiliary device for pressure gauge calibration provided by the embodiments of the present disclosure;

[0023] Figure 2 is a structural schematic diagram of a calibration connection assembly provided by the embodiments of the present disclosure;

[0024] Figure 3 is a structural schematic diagram of a calibration connection assembly provided by the embodiments of the present disclosure;

[0025] Figure 4 is a structural schematic diagram of a calibration connection assembly provided by the embodiments of the present disclosure;

[0026] Figure 5 is a structural schematic diagram of a calibration connection assembly provided by the embodiments of the present disclosure;

[0027] Figure 6 is a structural schematic diagram of a calibration connection assembly provided by the embodiments of the present disclosure;

[0028] Figure 7 is a structural schematic diagram of a calibration connection assembly provided by the embodiments of the present disclosure;

[0029] Reference signs:

[0030] 100, check table; 101, pressure source; 102, pressure standarder; 103, pressure instrument to be checked; 104, pressure pump; 105, pressure regulator; 106, assembly groove; 107, charging interface; 108, power switch; 109, vacuum chuck; 110, charging indicator; 111, power switch indicator; 200, calibration connection assembly; 201, calibration terminal; 202, terminal port; 203, upper limit calibration terminal; 204, common terminal; 205, lower limit calibration terminal; 206, upper limit warning interface; 207, common interface; 208, lower limit warning interface; 300, warning assembly; 301, upper limit alarm indicator; 302, common terminal communication indicator; 303, lower limit alarm indicator; 304, upper limit alarm buzzer; 305, lower limit alarm buzzer. DETAILED DESCRIPTION

[0031] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0032] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0034] In addition, the terms "set", "connected", and "fixed" should be interpreted broadly. For example, "connected" can be fixed connection, detachable connection, or integral configuration; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; or internal communication between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present disclosure according to the specific circumstances.

[0035] Unless otherwise specified, the term "a plurality of" means two or more.

[0036] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the preceding and following objects. For example, A / B represents: A or B.

[0037] The term "and / or" is a description of the association relationship between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0038] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] In combination Figures 1-2 As shown in the drawings, the embodiments of the present disclosure provide an auxiliary device for pressure instrument calibration, comprising a verification table 100, a calibration connection assembly 200 and a early warning assembly 300. The verification table 100 is provided with a pressure source 101, a pressure standard device 102 and a pressure instrument under test 103, and the pressure standard device 102 and the pressure instrument under test 103 are connected with the pressure source 101; the calibration connection assembly 200 comprises a calibration connection terminal 201 and a connection port 202, the calibration connection terminal 201 is arranged on the pressure instrument under test 103, the connection port 202 is arranged on the verification table 100, and the calibration connection terminal 201 and the connection port 202 are electrically connected; the early warning assembly 300 is arranged on the verification table 100 and connected with the connection port 202, and is used to send warning information when the pressure instrument under test 103 reaches a warning value.

[0040] By using the auxiliary device for pressure instrument calibration provided by the embodiments of the present disclosure, according to the calibration requirements, the appropriate pressure points are selected, the pressure source 101 is controlled to perform the operation of increasing and decreasing the pressure, and the warning information is sent when the pressure instrument under test 103 reaches the warning value. At this time, the reading of the pressure value can be performed, the calibration of the set point deviation is completed, the accuracy of reading the switching value when the alarm contact is connected and disconnected is ensured by using the auxiliary device, so that the accuracy of the pressure parameter of the measured pressure instrument is ensured, the quality of the calibration is improved, the actual needs are solved, technical support is provided for the quality assurance of the measurement data, and the operation is relatively convenient, the performance is reliable, the calibration work can be efficiently and quickly completed, and the calibration efficiency is improved.

[0041] Optionally, the calibration table 100 has a trapezoidal structure. This makes the overall structure more streamlined and coordinated, facilitates the installation and connection of parts, and improves the ease of operation.

[0042] It is worth noting that, in order to ensure the power supply and to enable the calibration operation to proceed normally, the calibration bench 100 is equipped with circuit boards and power supply units, which will not be described in detail here.

[0043] like Figures 3-4 As shown, optionally, the calibration terminal 201 includes an upper limit calibration terminal 203, a common terminal 204, and a lower limit calibration terminal 205. The upper limit calibration terminal 203, the common terminal 204, and the lower limit calibration terminal 205 are arranged side by side on the rear side of the pressure instrument 103 under test. The connection port 202 includes an upper limit warning interface 206, a common interface 207, and a lower limit warning interface 208. The upper limit warning interface 206, the common interface 207, and the lower limit warning interface 208 are all arranged on the calibration bench 100. The upper limit calibration terminal 203 is electrically connected to the upper limit warning interface 206, the common terminal 204 is electrically connected to the common interface 207, and the lower limit calibration terminal 205 is electrically connected to the lower limit warning interface 208. In this way, select the appropriate alarm test leads and connect them to the upper limit calibration terminal 203, common terminal 204, and lower limit calibration terminal 205 of the pressure gauge under test 103. Connect the three leads to the upper limit warning interface 206, common interface 207, and lower limit warning interface 208. Perform calibration according to the method for calibrating pressure gauges. When the pressure reaches the set alarm value, a warning message will be issued. At this time, the upper and lower switching values ​​of the alarm threshold pressure indication of the pressure gauge under test 103 can be read to ensure the accuracy and reliability of the calibration results.

[0044] Optionally, on / off switches are provided between the upper limit calibration terminal 203 and the upper limit warning interface 206, between the common terminal 204 and the common interface 207, and between the lower limit calibration terminal 205 and the lower limit warning interface 208. This makes the calibration operation selective, allowing for the selection of suitable alarm test leads according to the needs of the calibration operation, thus meeting diverse calibration requirements.

[0045] Optionally, the calibration table 100 is provided with a support platform located below the calibration terminal 201 and the connection port 202, with the on / off switch located on the support platform. This ensures the safety of the circuit by supporting the connection between the calibration terminal 201 and the connection port 202, as well as the on / off switch.

[0046] like Figure 5As shown, the early warning component 300 comprises an upper limit alarm indicator 301, a public end communication indicator 302 and a lower limit alarm indicator 303, which are arranged on the calibration table 100, and the upper limit alarm indicator 301 is connected with the upper limit early warning interface 206, the public end communication indicator 302 is connected with the public interface 207, and the lower limit alarm indicator 303 is connected with the lower limit early warning interface 208. In this way, by selecting a suitable pressure point, performing the pressure increasing and pressure decreasing operation, and reading the pressure value according to the indication of the upper limit alarm indicator 301, the public end communication indicator 302 and the lower limit alarm indicator 303, the calibration work of the set point deviation can be quickly and accurately completed.

[0047] Optionally, the early warning component 300 further comprises an upper limit alarm buzzer 304 and a lower limit alarm buzzer 305, the upper limit alarm buzzer 304 is connected with the upper limit alarm indicator 301, and the lower limit alarm indicator 303 is connected with the lower limit alarm buzzer 305. In this way, when the upper limit alarm indicator 301 is on, the upper limit alarm buzzer 304 also synchronously emits a buzzer warning, or when the lower limit alarm indicator 303 is on, the lower limit alarm buzzer 305 also synchronously emits a buzzer warning, so that the user can be informed of the calibration result through the sound and light warning mode, and the user can timely and accurately master the calibration work in real time.

[0048] Optionally, the upper limit alarm buzzer 304 and the lower limit alarm buzzer 305 emit different buzzer sounds. Preferably, the upper limit alarm buzzer 304 emits a buzzer sound of "d", and the lower limit alarm buzzer 305 emits a buzzer sound of "w". In this way, by means of different buzzer sounds, the user can judge the calibration work condition and quickly and accurately judge whether it is an upper limit alarm or a lower limit alarm.

[0049] Optionally, the upper limit alarm indicator 301, the public end communication indicator 302 and the lower limit alarm indicator 303 present different colors when they are on. In this way, when the early warning information is emitted, the user can quickly and accurately judge the early warning type according to the presented color, which is more time-saving and labor-saving, and helps to improve the calibration efficiency.

[0050] It is worth noting that the upper limit alarm indicator 301 presents red color when it is on, the public end communication indicator 302 presents yellow color when it is on, and the lower limit alarm indicator 303 presents green color when it is on. Of course, it can also present other different colors, which will not be described here.

[0051] Optionally, the pressure source 101 comprises a pressure pump 104 and a pressure regulator 105, the pressure pump 104 and the pressure regulator 105 are arranged on the calibration table 100, the pressure pump 104 is connected with the pressure standard 102 and the pressure instrument 103 under test, and the pressure regulator 105 is used for adjusting the output pressure of the pressure pump 104. In this way, according to the calibration requirement of the pressure instrument 103 under test itself, a suitable pressure point is selected, the calibration points of the upper limit and the lower limit of measurement are set, and the calibration operation is started by controlling the pressure regulator 105 to start the operation of increasing and decreasing pressure according to the calibration requirement, so that the operation is simple, efficient and reliable in performance, and the accuracy of the measurement and detection data can be effectively ensured.

[0052] Optionally, an assembly groove 106 is arranged on the calibration table 100, and the pressure pump 104 is arranged in the assembly groove 106. In this way, by arranging the pressure pump 104 in the assembly groove 106, the upper space of the calibration table 100 occupied by the pressure pump 104 can be reduced, the influence of the pressure pump 104 on the execution operation is reduced, and the operation is more convenient.

[0053] Optionally, a cover plate is rotatably arranged on the assembly groove 106. In this way, the protection of the pressure pump 104 placed in the assembly groove 106 can be enhanced.

[0054] As shown in Figures 6-7 Optionally, a charging interface 107 is arranged at a lower corner position of one side of the calibration table 100. In this way, the charging interface 107 can be used for charging, and when there is no power supply on the scene calibration site, sufficient power can be ensured to carry out the calibration work on the scene.

[0055] Optionally, a charging indicator 110 is arranged on one side of the charging interface 107. In this way, when the battery power is insufficient, the charger charging line can be connected to the charging interface 107, the charging indicator 110 is bright, indicating that it is charging, when the battery is fully charged, the charging indicator 110 is bright green, and after the charger is pulled out, the charging indicator 110 is off, and the charging process is completed.

[0056] Optionally, a power switch 108 is arranged at an upper corner position of one side of the calibration table 100. In this way, when starting the calibration operation, the power switch 108 is turned on, so that the calibration operation can be normally carried out, and when the calibration operation is completed, the power switch 108 is turned off, so that the power loss can be avoided.

[0057] Optionally, a power switch indicator 111 is arranged on one side of the power switch 108. In this way, the user can know the switch condition, and the situation that the power switch 108 is forgotten to be turned on or turned off can be avoided.

[0058] Optionally, the bottom corner position of the checking table 100 is provided with a vacuum chuck 109. In this way, the vacuum chuck 109 can be used to stably place the checking table 100 in the use position, avoiding the displacement of the checking table 100 under the influence of external force and falling, and ensuring the stability of the placement of the checking table 100.

[0059] In some embodiments, for the pressure gauge with alarm function of the normally open contact, the lower limit alarm of the tested pressure gauge 103 is set by using a special tool, and the pressure is uniformly and slowly increased on the pressure checking table 100. When the lower limit alarm value is reached, the lower limit alarm indicator light 303 is on, the common end communication indicator light 302 is also on, and the lower limit alarm buzzer 305 emits an alarm buzzing sound. At this time, the measurement lower limit upper switching value is read, and then the pressure is slowly decreased. When the pressure decreases to the lower limit alarm value, the lower limit alarm indicator light 303 turns off, and only the common end communication indicator light 302 is on. At this time, the measurement lower limit lower switching value is read. The difference between the upper and lower switching values of the set point is the switching difference of the measurement lower limit, and the difference between the upper switching value and the set point pressure value is the pressure increase set point deviation. The difference between the lower switching value and the set point pressure value is the pressure decrease set point deviation. The upper limit alarm of the tested pressure gauge 103 is set by using a special tool, and the pressure is uniformly and slowly increased on the pressure checking table 100. When the upper limit alarm value is reached, the upper limit alarm indicator light 301 is on, the common end communication indicator light 302 is on, and the upper limit alarm buzzer 304 emits an alarm buzzing sound. At this time, the measurement upper limit upper switching value is read, and then the pressure is slowly decreased. When the pressure decreases to the upper limit alarm value, the upper limit alarm indicator light 301 turns off. At this time, the measurement upper limit lower switching value is read. According to the requirements, the set point deviation and the switching difference are calculated.

[0060] For the pressure instrument with alarm function of normally closed contact, the lower limit alarm of the tested pressure instrument 103 is set by using special tool, and the pressure is uniformly and slowly increased on the pressure calibration platform 100. The lower limit alarm indicator 303 is always on, and the alarm buzzer 305 always emits alarm sound. When the lower limit alarm value is reached, the lower limit alarm indicator 303 turns off, the alarm buzzer stops, and the common terminal communication indicator 302 is on. At this time, the upper switching value of the lower limit is read, and then the pressure is slowly decreased. When the pressure decreases to the lower limit alarm value, the lower limit alarm indicator 303 is on, the lower limit alarm buzzer 305 emits alarm sound, and the common terminal communication indicator 302 is on. At this time, the lower switching value of the lower limit is read. The difference between the upper and lower switching values of the set point is the switching difference of the lower limit. The difference between the upper switching value and the set point pressure value is the set point deviation of the pressure increase, and the difference between the lower switching value and the set point pressure value is the set point deviation of the pressure decrease. The upper limit alarm of the tested pressure instrument 103 is set by using special tool, and the pressure is uniformly and slowly increased. When the upper limit alarm value is reached, the upper limit alarm indicator 301 is on, the common terminal communication indicator 302 is on, and the upper limit alarm buzzer 304 emits alarm sound. At this time, the upper switching value of the upper limit is read, and then the pressure is slowly decreased. When the pressure decreases to the upper limit alarm value, the upper limit alarm indicator 301 turns off, and the alarm buzzer stops. At this time, the lower switching value of the upper limit is read. The difference between the upper and lower switching values of the set point is the switching difference of the upper limit. The difference between the upper switching value and the set point pressure value is the set point deviation of the pressure increase, and the difference between the lower switching value and the set point pressure value is the set point deviation of the pressure decrease. At this time, the whole calibration process is completed, the corresponding set points are calibrated according to the requirements, and the corresponding set point deviations and switching differences are calculated. The power switch 108 is turned off, and the power switch indicator 111 is off.

[0061] The above description and drawings suffice to fully illustrate the embodiments of the present disclosure to enable a person skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments only represent possible changes. Unless explicitly required, individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments can be included in or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is only limited by the appended claims.

Claims

1. An auxiliary device for calibrating pressure gauges, characterized in that, include: A calibration bench (100) is provided with a pressure source (101), a pressure standard (102) and a pressure instrument to be tested (103), and both the pressure standard (102) and the pressure instrument to be tested (103) are connected to the pressure source (101); The calibration connection assembly (200) includes a calibration terminal (201) and a connection port (202). The calibration terminal (201) is mounted on the pressure gauge under test (103), and the connection port (202) is mounted on the calibration bench (100). The calibration terminal (201) and the connection port (202) are electrically connected. The calibration terminal (201) includes an upper limit calibration terminal (203), a common terminal (204), and a lower limit calibration terminal (205). The upper limit calibration terminal (203), the common terminal (204), and the lower limit calibration terminal (205) are arranged side by side. Located on the rear side of the pressure gauge under test (103), the wiring port (202) includes an upper limit warning interface (206), a common interface (207), and a lower limit warning interface (208). The upper limit warning interface (206), the common interface (207), and the lower limit warning interface (208) are all located on the calibration bench (100). The upper limit calibration terminal (203) is electrically connected to the upper limit warning interface (206), the common terminal (204) is electrically connected to the common interface (207), and the lower limit calibration terminal (205) is electrically connected to the lower limit warning interface (208). The warning component (300) is set on the calibration bench (100) and connected to the wiring port (202). It is used to issue a warning message when the pressure gauge (103) under test reaches the warning value. The warning component (300) includes an upper limit alarm indicator (301), a common end connection indicator (302) and a lower limit alarm indicator (303). The upper limit alarm indicator (301), the common end connection indicator (302) and the lower limit alarm indicator (303) are all set on the calibration bench (100). The upper limit alarm indicator (301) is connected to the upper limit warning interface (206), the common end connection indicator (302) is connected to the common interface (207), and the lower limit alarm indicator (303) is connected to the lower limit warning interface (208).

2. The auxiliary device for pressure instrument calibration according to claim 1, characterized in that, The warning component (300) also includes an upper limit alarm buzzer (304) and a lower limit alarm buzzer (305). The upper limit alarm buzzer (304) is connected to the upper limit alarm indicator (301), and the lower limit alarm indicator (303) is connected to the lower limit alarm buzzer (305).

3. The auxiliary device for pressure instrument calibration according to claim 1, characterized in that, The upper limit alarm indicator (301), the common terminal connection indicator (302), and the lower limit alarm indicator (303) display different colors when they are lit.

4. The auxiliary device for pressure instrument calibration according to claim 1, characterized in that, The pressure source (101) includes a pressure pump (104) and a pressure regulator (105). Both the pressure pump (104) and the pressure regulator (105) are set on the calibration bench (100). The pressure pump (104) is connected to the pressure standard (102) and the pressure gauge under test (103). The pressure regulator (105) is used to adjust the output pressure of the pressure pump (104).

5. The auxiliary device for pressure instrument calibration according to claim 4, characterized in that, An assembly groove (106) is provided on the calibration table (100), and a pressure pump (104) is installed in the assembly groove (106).

6. The auxiliary device for pressure gauge calibration according to any one of claims 1 to 4, characterized in that, A charging port (107) is provided at the lower corner of one side of the calibration table (100).

7. The auxiliary device for pressure gauge calibration according to any one of claims 1 to 4, characterized in that, A power switch (108) is installed at the upper corner of one side of the calibration table (100).

8. The auxiliary device for pressure gauge calibration according to any one of claims 1 to 4, characterized in that, A vacuum suction cup (109) is provided at the bottom corner of the calibration table (100).

Images