CN102654570A - Method for semi-automatically testing/calibrating instrument without programmable interface - Google Patents

Abstract

The invention relates to a method for semi-automatically testing/calibrating an instrument without a programmable interface. The method comprises the following steps of: 1, building a testing platform; 2, inputting a model of the instrument to be tested, and selecting a measurement standard device; 3, selecting a type, a parameter, an range and a testing point; 4, manually inputting a measurement reading of the instrument to be tested after stabilizing, meanwhile, automatically acquiring a corresponding parameter in the measurement standard device by test software, automatically figuring out a relative error or/and calculating a fiducial error by the test software, and judging whether the instrument to be tested is qualified; 5, then transferring to the next testing point, and testing until set testing points are tested completely; and 6, printing a testing/calibrating certificate and an original record. The method has the beneficial effects of realizing semi-automatic testing of a digital multimeter or meter source integrated machine without the programmable interface, and greatly increasing the working efficiency.

Description

Method for semi-automatic verification/calibration of instruments without program-controlled interface

technical field

The invention relates to a semi-automatic verification/calibration method for an instrument without a program-controlled interface. The instrument without a program-controlled interface includes a digital multimeter, a multi-function calibrator or a meter-source integrated machine.

Background technique

At present, various digital multimeters and multi-function calibrators have increasingly occupied an important position in instrument measurement and verification, and automatic and semi-automatic calibration/verification have naturally become the development trend of today's digital multimeters and multi-function calibrators.

General types of digital multimeters and multi-function calibrators are equipped with program-controlled interfaces (GPIB interface or RS232 interface), through which a fully automated test system can be established to give full play to the advanced functions of programmable measuring instruments, using high-performance, multi-functional The calibrator performs automatic measurement testing, data printing, data management, system maintenance, etc. on the digital multimeter to ensure the accuracy of the value transmission and meet the requirements of the measurement verification regulations. Most power metering institutes have been put into use now.

However, there is also a type of digital multimeter, multi-function calibrator, and meter-source integrated machine without a program-controlled interface. How to realize automatic verification/calibration is currently a major problem faced by electric power measurement institutes.

Contents of the invention

The technical problem to be solved by the present invention is to provide a semi-automatic verification/calibration method for an instrument without a program-controlled interface.

The technical solution adopted by the present invention to solve its technical problems:

The steps of the present invention are as follows:

(1) Build a test platform:

Described test platform is made up of measurement standard device, the computer that testing software is housed, keyboard and printer, and described measurement standard device is made up of multifunctional calibrator and digital multimeter with program-controlled interface; Described multifunctional calibrator and digital multimeter The output ends of the multimeter are respectively connected to the corresponding input ends of the computer, the output ends of the computer are connected to the input ends of the printer, and the keyboard is connected to the corresponding ports of the computer;

(2) Input the model of the meter to be tested and select the measurement standard device;

The meter to be checked is any one of a digital multimeter, a multi-function calibrator, and an all-in-one meter and source;

(3) Select the type, parameter, limit and test point;

(4) Manually input the measured readings of the tested meter after stabilization; at the same time, the test software automatically collects the corresponding parameters in the measurement standard device;

The measurement readings are AC and DC voltages, AC and DC currents, and resistance values;

The relative error or/and reference error is automatically calculated by the test software, and it is judged whether the checked table is qualified;

(5) Then jump to the next verification point for verification until the set verification point is tested;

(6) Print verification/calibration certificate and original records.

The beneficial effect of the invention is to realize the semi-automatic test of the digital multimeter without the program-controlled interface or the meter-source integrated machine, and greatly improve the working efficiency.

Description of drawings

Fig. 1 is a hardware configuration diagram of the present invention;

Fig. 2 is the operation flowchart of the present invention;

Fig. 3 is a test software interface diagram;

Figure 4 is a screenshot of the screen for selecting a meter;

Figure 5 is a cross-sectional view of the screen for setting the verification point;

Figure 6 is a cross-sectional view of the manually input checked meter reading and calculation screen;

Figure 7 is a sectional view of the printing certificate screen.

Detailed ways

Example

This embodiment takes the checked table FLUKE17B as an example.

The steps of this embodiment are as follows:

(1) Build a test platform:

Described test platform is made up of measurement standard device, the computer that testing software is housed, keyboard and printer, and described measurement standard device is made up of multifunctional calibrator and digital multimeter with program-controlled interface; Described multifunctional calibrator and digital multimeter The output terminals of the multimeter are respectively connected to the corresponding input terminals of the computer, the output terminals of the computer are connected to the input terminals of the printer, and the keyboard is connected to the corresponding ports of the computer;

(2) Enter the test software interface (see Figure 3);

(3) Enter the model of the meter to be tested and the address of the selected measurement standard (see Figure 4);

(4) Select the type, parameter, limit, and verification point (take the source inspection meter, DC voltage, 5V limit, and verification points 1V, 2V, 3V, 4V, and 5V as examples) (see Figure 5);

(5) Manually input the measured readings of the tested meter after stabilization, and at the same time, the test software automatically collects the corresponding parameters in the measurement standard device; the relative error and reference error are automatically calculated by the test software (see Figure 6);

(6) Then jump to the next verification point for verification until the set verification point is tested;

(7) After the test is completed, the verification certificate and original records are generated, and the entire operation is completed (see Figure 7).

In this embodiment, the model of the multi-function calibrator in the measurement standard source is FLUKE5520A, and the model of the digital multimeter is 1281.

In this embodiment, the test software uses Lebview8.2 of NI Company as the software platform.

The design of the test software is simple, concise, easy to operate, and flexible in use. In addition to completing the measurement functions required by the basic requirements, it also has the following functions:

a. Flexible man-machine dialogue interface;

b. Instrument address and test items can be selected; dynamic data display during the test process;

c. Color marking function;

d. Certificate and original template can be selected;

e. The certificate and the original generated project can be selected;

f. It can automatically test and memorize the zero point, and correct it in the future data;

g. The setting of the verification point is fully inclusive, and the professional verifier can flexibly set the verification plan according to the different requirements of different instruments;

h. For instruments without program-controlled interfaces, manually input the measurement readings of the inspected meters while automatically collecting data from standard instruments, and automatically calculate and process the data and issue certificates and original records.

The test software can realize the five functions of calibrating the digital meter's DC voltage, DC current, AC voltage, AC current and DC resistance. The test software has the function of selecting the address of the instrument.

When generating original records and certificates, fill in information related to the certificate, such as certificate number, customer name, address, instrument serial number, current temperature and humidity, and the program will write the relevant information into the certificate or original record.

Claims (1)

1. one kind to not carrying out semi-automatic calibrating/Calibration Method with the instrument of programmable interface, it is characterized in that the step of said method is following:

(1) build test platform:

Said test platform is made up of measurement standard, the computing machine that testing software is housed, keyboard and printer, and said measurement standard is made up of multi-function calibrator that has programmable interface and digital multimeter; The output terminal of said multi-function calibrator and digital multimeter connects the respective input of said computing machine respectively, the input end of the output termination printer of said computing machine, and said keyboard is connected with the corresponding port of computing machine;

(2) seized table model of input and selection measurement standard;

Said seized table is a digital multimeter, in source integrated any of multi-function calibrator, table;

(3) select type, parameter, amount limit, calibrating point;

(4) manually import survey measurements behind seized table stable; Simultaneously, the corresponding parameter in the said measurement standard gathered automatically by said testing software;

Said survey measurements is combined-voltage, ac and dc current, resistance value;

Automatically calculate relative error or/and fiducial error by said testing software, and judge whether seized table is qualified;

(5) jump into next calibrating point then and examine and determine, finish up to the calibrating point test that is provided with;

(6) print calibrating/calibration certificate and raw readings.

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