The text of the International Standard IEC was approved by ISO/ IEC Guide Uncertainty of measurement -. Find the most up-to-date version of IEC at Engineering also reflected by the older editions of the relevant standard IEC For good practice in HV test fields, this Sect. on HV measurement and uncertainty .

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Specifically, each converting device shall be covered individually, but transmission systems and measuring instruments may be covered generically. For front time this is usually the nominal epoch. If it is greater, then a new value of the assigned scale factor shall be determined in a performance test. NOTE 1 Different values for iigg may be given for different ranges of distances.
These assumptions lead to a procedure of evaluation of the expanded uncertainty of the scale factor F, both for the calibration situation and for the use of an approved measuring system in measurements. However, reference measuring systems may be used for other 6006-02, including routine daily use, if it is shown that such use does not affect their performance The performance checks specified in this standard are sufficient to verify this.
For undated references, the latest edition of the referenced document including any amendments applies. Part 1 Requirements for instruments IS 1 Part 2: To obtain the uncertainty of measurement of the approved measuring system, those of the components must be combined as demonstrated in Annex B. An approved measuring system shall have an uncertainty within the specifications of this standard throughout the ranges of operating and environmental conditions given in the record of performance.
The lead to the converting device shall carry only the current to the measuring system.
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NOTE 3 Investigation of the proximity effect in the performance test is only necessary if the type test data are not sufficient. The difference of the measured voltages shall be within 3 dB. For impulses, n impulses are applied.
During the actual voltage test, it is usually necessary to consider additional influencing quantities, apart from the calibration uncertainty of 6006-02 scale factor stated in the calibration certificate, in order to obtain the uncertainty of measurement of the test voltage value.
IEC-60060-2-High-Voltage-Test-Techniques.pdf
The output of the measuring system shall be compared with a device or system that 60006-2 proven its linearity or can be presumed to be linear over the full voltage range 6006-2 5. The smoothness of the unit step response array g i is less critical if equation D. Alternatively the test of Other contributions can be important in some cases and shall be considered in addition.
Requirements for instruments lEC Instruments and software used for measurement in high-voltage impulse tests — Part 2: NOTE Long intervals between performance tests can increase the risk of an undetected change in the measurement system.
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The proximity effect need not be investigated as the divider is located outside the minimum clearance specified by 60006-2 manufacturer. Mgo is the non-linearity contribution 660060-2 standard uncertainty determined during calibration of the scale factor see 5.
It iiec how the output estimate y is influenced by small variations of the input estimate X. NOTE 2 This method is applicable to alternating voltage and to impulse voltages. NOTE 2 The period of voltage application should not be longer than the assigned operating time, but can be limited to a time sufficient to reach equilibrium.
Additionally step response 6060-2 evaluated according to Annex C shall satisfy the recommendations of Table 6. Failure to prove the linearity using such a method does not necessarily mean the measuring system is non-linear. Correlation will not be discussed further in this standard.
Its Type A standard uncertainty is equal to the experimental standard deviation of the mean: Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments.
NOTE 2 Attention should be paid to the equal charging of all stages of a voltage generator.

The withstand tests shall be performed at the polarity kec polarities for which the system is intended. Macmillan Publishing Company, New York, NOTE A measuring system has a unit step response for each reference level.
The maximum rate of application for impulse voltages shall be specified.

For exceptions see 4. Some guidance on determining uncertainty contributions, that need to be considered, and on their combination is given in Clause 5 and Annexes A and B.
