??λ???????????????? Fluke 8508A

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8.5λ????????
8508A????????????????????????????200mV??1kV???????????????е???????????????е??????????????8.5λ?????????????????1nV????????佻???????????????? 1MHz??????????????????????????????????????8508A??????濪????-??????????????/???????????????????????????????????????????????????????????Ч???

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8508A?????????????????????????????????????????????????????????????????????????????ζ????????????·?????????С?????????????????????ɡ?8508A????????????????????????????????????д???????????α?????????б????????????????????????á???????????????????в?????????
8508A???????????????200mA??20A??????Χ??1Hz??100kHz??????????????в?????????????????У?????У?????????????????????

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????????????2W??20GW?????????10nW???????????????????????????????????????200V???????????100mA????????????

?ο??????????????????????????????
????????????????????Χ??8508A??????2??3??4????????PRT??????????SPRT????????????????????Χ??-200?浽660?檔???????????????????????????????ITS-90??Callendar van Duesen???????????????????8508A?????????????????PRTУ??????????????????????????????????????????????????????????????????????
????????????????????????????????Χ?????????8508A?????????????????

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8508A?????????????????????????????????????????????????????????????????????????????似????????????????????????????????????????б?????????????????????????????????裬????л???????·???????????????У???????????????????????????????Ч????????

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??????????????Χ????????????????????8508A-SPRT??????????????????8508A-PRT????????????????????????????????????8508A?ο?????????????????????????????

8508A-PRT/-SPRT

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??λ???????????????? Fluke 8508A

????	??????Χ	1???????	1???????
		95%??????	99%??????
		(ppm????+ppm?????	(ppm????+ppm?????
??????	0~199.999999mV	4.5+0.5	6.0+0.6
	0~1.99999999V	3.0+0.2	4.0+0.25
	0~19.9999999V	3.0+0.2	4.0+0.25
	0~199.999999V	4.5+0.2	6.0+0.25
	0~1050.00000V	4.5+0.5	6.0+0.6
???????	0~199.99999mA	12+2.0	15+2.0
	0~1.9999999mA	12+2.0	15+2.0
	0~19.999999mA	13+2.0	16+2.0
	0~199.99999mA	36+4.0	45+4.0
	0~1.9999999A	170+8.0	210+8.0
	0~19.999999A	380+20	455+20
????	0~1.99999999??	1.5+2.0	19+2.5
	0~19.9999999??	9+0.7	11.5+0.9
	0~199.999999??	7.5+0.25	9.5+0.3
	0 ~ 1.99999999M??	10+0.5	10.5+0.6
	0 ~ 19.9999999M??	15+5	20.5+6
	0~199.999999M??	60+5	75+6
	0~1.99999999G??	150+50	195+60
	0~19.9999999G??	525+500	675+600
???????	0~199.9999mV	105+10	125+12
	0~1.999999V	65+10	75+12
	0~19.99999V	65+10	75+12
	0~199.9999V	65+10	75+12
	0~1050.000V	95+20	110+25
????????	0~19.99999mA	280+100	340+120
	0~199.9999mA	250+100	305+120
	0~1.999999A	600+100	705+120
	0~19.99999A	800+100	900+120
???	0~199.999999??	7.5+0.14(0.002??)	9.5+0.18(0.002??)
???	200~1999.99999??	7.5+0.5(0.0025??)	9.5+0.6(0.0025??)

??	8508A-SPRT	8508A-PRT
????Χ	-200?浽661??	-200?浽661??
???RTPW	25.5??????0.5????	100??????1????
У????????	??	??661???????0.015??
?????	0.1??/??	>0.3925??/??
?????	??????< 10mK	??661?????< 30mK/500С?
?????	?????????2-3 mK	??661?????< 30mK/500С?
?????	??	??0.003??
????????	IconelTM 600	IconelTM 600
????????	???0.219??? ?? ??19??磨5.56mm?? 482mm??	???0.25??? ????15??磨6.35mm ??381mm??

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??λ???????????????? Fluke 8508A

???	???
8508A	?ο?????????
8508A/01	?ο????????????????????4mm??????????????????
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8508A-LEAD	?????????????2??1??6??ptfe???￡?????????????????????4mm????
8508A-PRT	????????????????
8508A-SPRT	???????????????????
Y8508	?????????
Y8508S	?????????????
8508A-7000K	1G??????????У??????????

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