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DC high current comprehensive characteristic test device is used to detect the released characteristics of DC low-voltage electrical overcurrent protection electrical device，which is used in low-voltage electrical industry for DC products for long time delay，short time delay，instantaneous tripping test and short circuit test. With the wide application of DC low-voltage electrical products in non-ferrous metallurgy，chlor-alkali chemical industry，low-voltage power distribution，DC transmission and distribution，new energy and railway applications，the DC high current comprehensive characteristic test device used for DC electrical product testing needs to be traced regularly to ensure that it can meet the accuracy requirements of the test detection capability. In the field of measurement calibration，the present situation of relevant calibration methods was analyzed，and the research direction of calibration methods of this test device was reviewed. According to the corresponding product of the test device and the national standard，a new calibration parameter was proposed. Aiming at the calibration problem of the DC high-current device，the measurement method of optical fiber current sensor was proposed，so as to evaluate the uncertainty of the data generated.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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