Fluke Calibration 5720A 取扱説明書

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取扱説明書

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®
5700A/5720AII系列
多功能校准器用户手册
PN 601622
May 1996
19965
© 1998 福禄克公司, 所有权利保留。美国印刷
所有产品名称都为各自公司的商标.
I
LIMITED WARRANTY AND LIMITATION OF LIABILITY
Each Fluke product is warranted to be free from defects in material and workmanship under normal use and
service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and
services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of
a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in
Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal
conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with
its functional specifications for 90 days and that it has been properly recorded on non-defective media. Fluke
does not warrant that software will be error free or operate without interruption.
Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers
only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is
available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable
international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts
when product purchased in one country is submitted for repair in another country.
Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair,
or replacement of a defective product which is returned to a Fluke authorized service center within the
warranty period.
To obtain warranty service, contact your nearest Fluke authorized service center to obtain return
authorization information, then send the product to that service center, with a description of the difficulty,
postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following
warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke
determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal
condition of operation or handling, including overvoltage failures caused by use outside the product’s
specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair
costs and obtain authorization before commencing the work. Following repair, the product will be returned to
the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges
(FOB Shipping Point).
THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE
FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES,
INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.
Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or
limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not
apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other
decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other
provision.
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99
To register your product online, visit register.fluke.com
II
限保证和有限责任
每台 Fluke 的产品在正常使用和维护的情况下保证没有材料和工艺上的缺陷。产品的保证期为一年,从发
运之日起计算。零件、产品修理和维护的保证期为 90 天。此项保证的对象仅为原始购买者或者 Fluke 授权代
理商的最终使用客户,并且不适用于保险丝、普通电池或者 Fluke 认为由于意外的或不正常的工作或管理状况
而错误使用、经过改动、疏忽管理、受到污染或损坏的产品。Fluke 保证软件将按照其功能技术指标牢靠地工
90 天,并已经正确地记录在无缺陷的介质上。Fluke 不保证软件没有错误或工作中无中断。
Fluke 授权代理商应当只将此种对新的和未使用过的产品的保证延伸到最终使用客户,但无权代表
Fluke 做出更高的或不同的保证条件。只有从 Fluke 授权的销售渠道购买的产品或者当购买者已经支付了适当
的国际价格时才能获得这种保证支持。当从一个国家购买的产品送到另一个国家进行修理时,Fluke 保留向购
买者开具发票收取修理/更换零件进口费用的权利。
Fluke的保证责任是有限的,对于在保证期之内退回到 Fluke 授权的维修中心的有缺陷的产品, Fluke
可以选择退还购买款项、免费修理或更换产品。
为获得保修,请与您最近的 Fluke 授权维修中心联系以得到返修授权信息。然后将该产品发送到该维
修中心,提供故障说明、并付邮资和保险费(FOB 目的地)。Fluke 不承担运输中损坏的风险。保修之后,该
产品将返还给购买者,并付运费FOB 目的地)如果 Fluke 认定故障是由于疏忽管理、错误使用、受到污染、
经过改动、意外的或不正常的工作或管理状况,包括因超出产品规定的额定值使用而引起的过电压故障,或者
正常的磨损和机械部件的破损而引起,Fluke 将提供估计的修理费用并在得到授权之后才开始维修工作。修理
之后,该产品将返还给购买者,并付运费。购买者则要支付修理费用和返程的运输费用(FOB 发运点)。
这种保证是购买者唯一的和专有的补救方法,并且可代替所有其它的保证条件、表述或默许的条款,
包括但不限于任何默许的保证条件或者为某种特定目的的商品性或适应性。FLUKE 对于由于任何理论原因引起
的、任何特别的、间接的、意外的或后果性的损坏或丢失,包括数据丢失,都不承担责任。
由于某些国家或者州不允许对默许保证条款的限制,不允许排斥或者限制意外的或后果性的损失,对
这种保证的限制或排斥可能不适合于每一个购买者。如果本保证的任何条款被法院或其它的决策主管裁判机构
判定为无效或不可实施,则这种判定将不影响任何其它条款的有效性或可实施性。
Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.
Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
11/99
若要登记您的产品, 请访问福禄克公司网站: register.fluke.com
III
安全须知
警告
高压
该设备在工作时会使用到高电压
致人伤亡的电压
在设备的端钮上会出现致人伤亡的电压,请检查所有保护措施!
为避免电击,使用者不可带电接触输出Hi Sense Hi接线柱。在工作期间,在这些
端钮上可能会出现能导致人身伤亡的1100V 交流或直流电压。
无论在何种操作条件下,请保持一只手远离设备,以降低电流流经身体生命器官的危
险。
本手册中的术语
本设备的设计和测试符合本手册第1章“技术参数”部分中“通用技术参数”中所列的安全标
准。本手册包括的信息和警告均是保证设备处于安全状态和确保安全操作必需遵守的。
警告: 指示会造成人员伤害或死亡的危险操作或条件。
注意: 指示会造成仪器损坏的操作或条件
标注在仪器上的标志
危险――高压
保护地----(大地)端钮
注意-------请参阅使用手册。手册中有正确使用此功能的信息。
电源
对地电
亦不得高于264V。为仪器安全工作,电源电缆中的连接地线必须可靠接地。
为防止火灾, 须使用电压选择开关标签上指定的,与所使用的电源具有相同的额定电压和额
丝。
570
器的端钮之前,请将电源插头连接至具有适当接地措施的插座内。
请向符合资格的维修人员征询电源电缆和连接器的信息。
为避免爆炸,不可在有爆炸性气体的环境操作5700A II系列和5720A II 系列校准器。
不可
20A II 系列校准器内部,没有需要使用者维护的部件,所以使用者没有必要打开机盖。
5700A II系列和5720A II系列应该工作于不高于264V真有效值电压的交流电源,
使用合适的保险丝
定电流的保险
0A II 系列或5720A II系列校准器的接地
5700A II系列和5720A II 系列校准器属于IEC 348中规定的I类安全(机箱接地)设备。
箱通过电源电缆中的接地导线进行接地。为避免电击,在将任何信号连接至5700A II系列
5720A II 系列校准
使用正确的电源线
必须使用符合本国规定,能够使5700A II系列和5720A II 系列校准器正常工作的电源电
缆以及插头和插座。使用处于完好状态的电源电缆。关于电源线的详细信息,请参考第二
-3
在有爆炸危险的环境中工作
在仪器工作时打开机盖
为避免人身伤害,在摘掉电源电缆前不可打5700A II系列和5720A II 系列校准器的机
。在机盖未安放好前不可操作5700A II系列和5720A II 系列校准器。在5700A II系列和
57
IV
遭到电击时的急救措施
者远离带电导体
闭高电压,请将电路接地。
必进行普通和全身的死亡测试
不省人事、呼吸停止、没有脉搏、面色苍白、身体僵硬,以及严重的
烧伤
处理遭电击者
遭电击者停止呼吸,如果您受过训练,请马上进行人工心肺复苏术或嘴对嘴的人工
呼吸。
使遭电击
立刻关闭高电压,并将电路接地。若不能马上关
求救!
大声求救。拨打急救电话,请求医生的帮助。
电击的征兆包括
等。
V
目录
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手册·························································································
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放大器 ····························································
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压维护程序 (仅限U.S.A.) 1-12·············································
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)校准支持 ······································
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列校准器的组成 ·····················································
0A II系列校准器的校准 ·····················································
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和相对不确定度 ···················································
指标技术指标 ·······························································
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带交流电压模块 (选件 5700-03) 技术指标 ·································
技术指标 ·······················································································
技术指标 ···········································································
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章节 主题
1 前言和技术指标 ······· 1-1
1-1. 前言··············· 1-1
1-2. 关于本手册·········································· 1-2
1-3. 如何使用本 1-2
1-4.其它设备手册·· 1-3
1-5.宽带交流电压模块(5700A-03选件) 1-3
1-6.辅助放大器·············· 1-4
1-7. 5725A 放大器···· 1-5
1-8. 5205A 5215A 精密功率 1-5
1-9. 5220A 跨导放大器·········································· 1-5
1-10.支持设备和服务···························································································1-6
1-11. 732B 直流电压参考标准 ································· 1-6
732B-200 直流电 1-6
1-13. 742A 系列电阻标准 ······················· 1-6
1-14. 宽带交流电压模块(选件 5700A-03 ··1-7
1-15. 服务中心 ····1-7
1-16. 5700A/5720A II·· 1-8
1-17. 5700A/572 ·· 1-8
1-18. 校准程序·· 1-10
1-19. 建立可溯源性 1-10
1-20. 校准报告·· 1-10
1-21. 校准检定 ········ 1-11
1-22. 开发性能档 1-11
1-23. 量程校准 ············ 1-11
1-24. 直流零点校准 ···································· 1-11
1-25. 技术指标 ································ 1-12
1-26. 技术指标置信度 ·· 1-12
1-27. 使用绝对不确定度 1-12
1-28. 使用第二性能 1-12
1-29. 直流电压技术指标·· 1-13
1-30. 交流电压技术指标·· 1-16
1-31. 电阻技术指标························································ 1-22
1-32. 直流电流技术指 1-26
1-33. 交流电流技术指标 ···· 1-29
1-34. 1-34
1-35. 通用 1-35
1-36. 辅助放大器 1-36
2 安装 ··········· 2-1
2-1. 介绍 ························ 2-2
2-2. 拆箱和安装 2-2
2-3. 服务信息······ 2-3
2-4. 放置和上机架安 2-3
VI
2-5. 冷却要求 ···· 2-3 ·······························································································
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5205A 5215A精密功率放大器 ·················································
5220A 跨导放大器 ········································································
线柱 ·····················································································
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OM 菜单 ·········································································
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用外部电压屏蔽保护·····················································
下使用电流屏蔽保护 ···························································
电阻连接 ···································································
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输出 ·······················································································
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2-6. 拆装保险丝 ······ 2-4
2-7. 选择电源电压 ··········· 2-5
2-8. 连接至电源 ·············································· 2-7
2-9. 连接辅助放大器················· 2-7
2-10. 连接5725A 放大器 2-7
2-11. 2-7
2-12. 连接 2-7
2-13. 选择输出接 2-7
3 特性 ················ 3-1
3-1. 介绍 ··········································································································· 3-2
3-2. 前面板特性 ·· 3-2
3-3. 屏幕保护 3-2
3-4. 后面板 3-11
3-5. 软键菜单树·· 3-13
4 前面板操 4-1
4-1. 介绍 ······ 4-3
4-2. 启动校准器 ·· 4-4
4-3. 预热·················· 4-4
4-4. 直流校零 4-5
4-5. 进行直流校 4-5
4-6. 直流校零提示 ················ 4-5
4-7. 设置菜单························ 4-6
4-8. 仪器设置 ··················· 4-7
4-9. 格式化 EEPR ·· 4-7
4-10. 特殊格式的设置 ·· 4-8
4-11. 设置内部时钟 ·· 4-9
4-12. 选择放大器·· 4-10
4-13. 检查设备配置 ·········· 4-11
4-14. 特殊功能菜单········ 4-12
4-15. 复位校准器 ················ 4-12
4-16. 工作模式和预备模式········ 4-13
4-17. 连接校准器和UUT···························· 4-13
4-18. 推荐的电缆和连接器 ················ 4-13
4-19. 什么情况下使用四线技术·· 4-14
4-20. 什么情况下使 4-15
4-21. 什么情况 4-15
4-22. 四线电阻和两线 4-16
4-23. 电缆连接说明·· 4-16
4-24. 设置输出·········· 4-22
4-25. 直流电压输出 4-24
4-26. 交流电压 4-25
4-27. 直流电流输出 ······································· 4-27
4-28. 交流电流输出·· 4-28
4-29. 电阻输出·············· 4-30
VII
4-30. 宽带交流电压输出 4-32 (选件 5700A-03) ················································
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A 精密功率放大器输出 ············································
大器输出 ·······································································
定度指标 ·······························································
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差:交流和直流电压和电流输出··································. .
差:电阻输出 ···································································
和线性度误差的介绍 ···············································
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和满度比例检查线性度 ·······················································
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压电流限制 ···············································································
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手持多用表 ·······································································
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系列数字多用表 ······························································
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置和增益校准 ···················································································
交流校准 ·······················································································
坦度测试 ·············································································
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险丝 ·······························································································
4-31. 可调相位输出 ······ 4-34
4-32. 锁相至外部信号 ······································ 4-35
4-33. 使用辅助放大器 ············ 4-36
4-34. 5725A 放大器输出·················· 4-37
4-35. 5205A 5215 4-38
4-36. 5220A 跨导放 4-40
4-37. 检查校准器的不确 4-41
4-38. 误差模式操作 ·· 4-41
4-39. 误差模式概述···· 4-42
4-40. 进入误差模式 ··················································································· 4-42
4-41. 退出误差模式·················· 4-42
4-42. 使用误差模式······································ 4-43
4-43. 读取UUT. 4-43
4-44. 读取UUT 4-44
4-45. 关于偏置、满度 4-45
4-46. 偏置误差·············· 4-45
4-47. 刻度误差 4-46
4-48. 线性度误差 4-47
4-49. 误差类型的组合 ························ 4-47
4-50. 设置偏置 ········ 4-48
4-51. 设置满度比例 ········ 4-49
4-52. 使用偏置 4-50
4-53. 设置输出限制 ················ 4-54
4-54. 设置电 4-54
4-55. 应用实例·· 4-55
4-56. 校准70系列 4-55
4-57. 电缆 ········ 4-56
4-58. 屏蔽保护 4-56
4-59. 四线技术 ································· 4-56
4-60. 测试仪 4-56
4-61. 校准器表 4-59
4-62. 校准8840A 4-60
4-63. 电缆 ················ 4-60
4-64. 屏蔽保护 ······ 4-60
4-65. 四线技术 ························· 4-62
4-66. 基本校准程序 ···· 4-62
4-67. 校准设置程序·· 4-62
4-68. 模数转换(A/D 校准 4-63
4-69. 4-64
4-70. 高频 4-66
4-71. 进行宽带平 4-67
7 维护 ······················· 7-1
7-1. 介绍 ········ 7-2
7-2. 拆装保 7-3
VIII
7-3. 清洁空气过滤器 ············································· 7-4 ··········································
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校准5700A/5720A II系列校准器 ··········································
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宽带交流电压模块 (选件 5700A-03) ········································
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(Y8021, Y8022 Y8023) ························
1702 Y1703) ·······································
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(Y5702) ·······································································
(732B) ·····································································
742A-10k) ·······························
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8-13. 5725A 放大器 ························································································· 8-5
8-14. 5205A 5215A 精密功率放大器 ······················································ 8-6
8-15. 5220A 跨导放大器··················································································· 8-6
7-4. 清洁外表 7-5
7-5. 校准 ···························································· 7-5
7-6. 用外部标准 7-5
7-7. 校准要求 ··································································································· 7-6
7-8. 什么情况下调整校准器的不确定度指标 ··············································· 7-6
7-9. 校准程序····································································································· 7-7
7-10. 量程校准 7-13
7-11. 校准 7-17
7-12. 校准检查 ··········································· 7-20
8 选件和附 8-1
8-1. 介绍 ·················· 8-2
8-2. 宽带交流电压模块(选件 5700A-03) 8-2
8-3. 附件 ··················································································· 8-2
8-4. 低热电势测试线·················································· 8-3
8-5. 上机架安装套件(Y5737 Y5735) ······················································ 8-3
8-6. 屏蔽的IEEE-488 接口电缆 . 8-3
8-7. RS-232C空调制解调电缆 (Y 8-3
8-8. 5205A 5215A 接口电缆 (Y5701) ······················ 8-3
8-9. 5220A 接口电 8-3
8-10. 直流电压参考标 8-4
8-11. 1 10 K 电阻标准 (742A-1 8-4
8-12. 辅助放大器 ·········· 8-5
IX
第一章 前言和技术指标
1前言和技术指标 1-1 ·················································································
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1-1. 前言 1-1
1-2. 关于本手册 1-2
1-3. 如何使用本手册 1-2
1-4. 其它设备手册 1-3
1-5. 宽带交流电压模块(5700A-03选件) 1-3
1-6. 辅助放大器 1-4
1-7. 5725A 放大器 1-5
1-8. 5205A 5215A 精密功率放大器 1-5
1-9. 5220A 跨导放大器 1-5
1-10. 支持设备和服务 1-6
1-11. 732B 直流电压参考标准 1-6
732B-200 直流电压维护程序 (仅限U.S.A.) 1-12 1-6
1-13. 742A 系列电阻标准 1-6
1-14. 宽带交流电压模块(选件 5700A-03)校准支持 1-7
1-15. 服务中心 1-7
1-16. 5700A/5720A II系列校准器的组成 1-8
1-17. 5700A/5720A II系列校准器的校准 1-8
1-18. 校准程序 1-10
1-19. 建立可溯源性 1-10
1-20. 校准报告 1-10
1-21. 校准检定 1-11
1-22. 开发性能档案 1-11
1-23. 量程校准 1-11
1-24. 直流零点校准 1-11
1-25. 技术指标 1-12
1-26. 技术指标置信度 1-12
1-27. 使用绝对和相对不确定度 1-12
1-28. 使用第二性能指标技术指标 1-12
1-29. 直流电压技术指标 1-13
1-30. 交流电压技术指标 1-16
1-31. 电阻技术指标 1-22
1-32. 直流电流技术指标 1-26
1-33. 交流电流技术指标 1-29
1-34. 宽带交流电压模块 (选件 5700-03) 技术指标 1-34
1-35. 通用技术指标 1-35
1-36. 辅助放大器技术指标 1-36
1
前言 1-1.
Fluke公司5700A/5720A II 系列校准器是校准多种电子测量仪器的精密仪器。这些设备可以
在很宽的环境温度范围内维持很高的精度,使其在任何环境下都可以测试设备,消除了仅
能在温度受控的标准试验室才能进行校准的限制。使用5700A/5720A II 系列校准器,可以
校准各种测量交流或直流电压、流或直流电流和电阻的精密多用表。5720A II系列校准器
5700A II系列的操作方法相类似,不同的是5720A II系列校准器具有高得多的精度指标
可选的5700A-03宽带交流电压模块,还可以校准射频电压表。5700A II系列和5720A II
列校准器都可选用该模块。
本章末尾提供了校准器的技术指标。校准器是完全程控的精密校准源:
直流电压,高达1100V
交流电压,高达1100V,频率为10 Hz 1.2 MHz
交流和直流电流,高达2.2A,频率为10 Hz to 10 kHz
电阻的值为1x10n 1.9x10 n,从1 100 M,加一个短路值。
可选宽带交流电压从300µV3.5V,至50负载,(-57 dBm+24 dBm),10Hz30MHz
校准器具有如下性能:
内置的受环境控制的参考使其在很宽的环境温度范围内保证高性能。
利用输出调节旋轮,可进行误差自动计算;显示屏会显示线性度、偏置和比例误差。
10和除10键可使当校准点在整十数倍切换输出时操作非常简单。
利用可编程的输出限制功能,可以防止过高输出,防止对设备或人身存在危险的操作。
利用SPEC键,可以显示设备在选定的工作点、校准间隔和技术指标置信度的技术指标。
具有辅助电流接线柱,可以使用独立的电流输入来校准仪表,而无需挪动电缆。
具有实时时钟和日历,可用于校准报告的时间输入。
偏置和比例模式,使多用表的线性度测试非常简单。
可调的相位参考信号输出和锁相输入。
用于Fluke 5725A5220A5205A 5215A的放大器接口
标准的IEEE-488 (GPIB)接口,符合ANSI/IEEE488.1-1987IEEE-488.2-1987
可以选择正常远地模式或 Fluke 5100B Fluke 5200A系列校准器的仿真模式来响应系
统控制软件。
EIA标准RS-232串行数据接口用来打印、显示、传送内部存储的校准常数,或远地控制校准器。
内置齐全的自检和诊断功能,可进行模拟功能和数字功能的自检和诊断。
有一个可溯源的校准程序,仅需要10V 110 k标准的校准模式,很少需要独立验证。
快速、简便、自动校准检查在校准再调用时提供了更高的置信度,可以利用这些数据来存
档和在校准再调用期间标定校准器的性能。
1-1
关于本手册 1-2.
本手册提供了安装校准器,以及从前面板按键和远程进行操作的完整信息。还提供了一个
与校准相关的数据表,以及技术指标和错误代码信息等通用信息。在本手册中主要覆盖了
以下几个主题:
安装
操作控制和功能
前面板的操作
远地操作(IEEE-488总线或串行口的远地控制)
串行口操作(打印、显示或传输数据,以及串行口远程控制的设置)
操作维护,包括如何校准5700A/5720A II系列校准器
选件和附件
如何使用本手册
请使用下列目录查找特定的信息:
快速设置步骤:5700A/5720A II
系列校准器用户入门导则
拆箱和安装:第2
安装及上机架安装:第2章;亦可参考上机架安装工具指示表
交流电源和接口电缆:第2
控制开关、指示器和显示器:第3
前面板的操作:第4
与被测设备(UUTUnit Under Test)的连接:第4
使用辅助放大器:第4
自校准:第1章和第7
远地操作(IEEE-488或串行口):第5
选件和附件:第2章和第8
设备技术指标:本章的末尾
工作原理:5700A/5720A II
系列维护手册
的第2
1-2
其它操作手册 1-4.
每款设备在运输时都包括了以下所列的手册(在本用户手册中包括了两个参考指南)。若
需要订购更多的手册,请参考福禄克产品目录,或者联系福禄克的销售代表。
整套手册为操作者和服务或维修人员提供了完整的信息。全套包括如下手册:
5700A/5720A II
系列用户入门导则
(P/N 601648) 包括了用户手册中使用说明的摘要,包含
有启动和操作校准器的信息。该指南提供了多语言版本。
5700A/5720A II
系列远程编程参考指南
(P/N 601655) 包括了校准器的远程命令摘要,包含
使用状态字和寄存器来确定系统状态所需的信息。
5700A/5720A II
系列维修手册
(P/N 601630) 提供了维护和维修信息,包括:工作原理、
能测试、校准、故障检测、配件列表和缩略图等。
宽带交流电压模块(选件 5700A-03 1-5.
宽带交流电压模块(选件5700A-03)可以安装于5700A II 5720A II 系列校准器。该模
块是一个用于校准射频电压表的高精度、低噪声、具有非常平坦频率响应的交流电压源,
频率范围为10 Hz 30 MHz。输出从300 µV (-57 dBm) 3.5V (+24 dBm)可分为七级,
通过一个N型的同轴连接器输出,负载为50输出可以通过前面板的控制开关或远地控制
选择以伏特或dBm为单位。
该宽带模块还可以和校准器的输出调节控制一起工作,可以将宽带仪表的误差显示为输出
的百分比或分贝。
随宽带模块还包括一个N型的输出电缆和一个50的端接器。宽带模块是按输出电缆末端的
标准设备的端口值校准的。
1-3
辅助放大器 1-6.
5700A 5720A 可以用以下四个放大器,来扩展校准器的高压性能和电流范围:
Fluke 5725A放大器
Fluke 5205A精密功率放大器
Fluke 5215A精密功率放大器
Fluke 5220A跨导放大器
校准器后面板的接口连接器可以使用电缆直接来控制5725A5220A5205A 5215A
放大器。同时可连接三个放大器至校准器,但是在同一时间只能激活一个输出。一旦连
接了放大器,并在设置菜单中进行了配置,即可用校准器完全控制放大器。
4章提供了操作每一放大器的指令。本章结尾的通用技术指标部分包括了配有5752A放大
器的校准器的技术指标。1-1中总结了每款放大器所提供的扩展功能。每一扩展功能之后
有一个简短的描述。
1-1. 辅助放大器数据
型号 模式 范围
5725A放大器 AC V
DC I
AC I
20 1100V rms,最大70 mA40 Hz 30 kHz
(50 mA < 5 kHz)
220 750V rms ,最 70 mA30 kHz 100 kHz
0 ±11A
1 11A rms40 Hz 10 kHz
5205A精密功率放大器 DC V
AC V 100 1100V -100 -1100V rms @ 70 mA
220 1100V rms @ 200 mA, 10 Hz 100 kHz
5215A精密功率放大器 AC V 220 1100V rms @ 200 mA, 10 Hz 100 kHz
5220跨导放大器 DC I
AC I 0 ±20A
2.2 20A rms, 10 Hz 5 kHz
1-4
5725A 放大器 1-7.
Fluke 5725A放大器是一个受校准器控制的外部单元,用来扩展交流电压驱动能力和交直流
电流输入范围。该放大器为校准器的1100V 交流量程增加了如下功能,而不损失精度:
高压下的频率极限提高为100 kHz @ 750V, 30 kHz @ 1100V
5 kHz以上的负载极限提高为70 mA
容性驱动能力提高为1000 pF,并受最大输出电流的限制。
扩展的电压适用于校准器的前/后面板的接线柱,无需在校准期间更换电缆。
5725A前面板的一组独立的接线柱提供了扩展量程的交直流电流输出。由于大部分仪表都
有一组独立的输入端钮用于高电流量程,所以就不需要在校准期间更换电缆。也可以将
5725A设置为通过其接线柱提供所有电流(标准的校准器产生的电流和其本身的电流)。
5205A 5215A 精度功率放大器 1-8.
Fluke 5205A 5215A 精密功率放大器为要求的应用扩展了校准器的高压负载和频率能
力。5205A 5215A均为校准器的1100V 交流 电压量程增加了如下功能,并在负载端进
行检测来控制准确输出:
高压的频率极限提高为100 kHz @ 1100V
电阻性负载极限提高至200 mA
容性负载极限提高至1500 pF
另外,5205A将校准器的直流 1100V 负载极限提高至70 mA1500 pF
5205A 5215A允许校准器达到更高的电压-赫兹乘积,在重负载和长电缆下也能维持高
精度。
5220A 跨导放大器 1-9.
Fluke 5220A跨导放大器将校准器的交流和直流电流功能扩展至20A。这样的大电流输出使
您可以校准电流表和分流器,以及数字多用表的大电流功能。高的顺从电压意味着5220A
可以通过多匝线圈输出电流,用于校准电流互感器探头和霍耳效应探头。
1-5
支持设备和服务 1-10.
福禄克以高精度、高质量和广泛的服务范围来支持您的校准需要。根据您的需要、场所和
性能,您可以独立维护您的5700A/5720A II系列校准器,或者利用福禄克的服务来进行一部
分或全部的维护需要。下面几段详细描述了福禄克为校准器提供的支持设备和服务。关于
这些支持设备和其它福禄克设备的技术参数和订购信息,请参考福禄克的产品目录,或联
系福禄克销售和服务中心的代表人员。
732B 直流电压参考标准 1-11.
Fluke 732B是一个坚固、方便携带的固态直流参考标准,具有可预测10 V输出。这种高预
测性允许福禄克标准实验室和福禄克的客户彻底消除脆弱的、饱和的标准电池。实验室仍
然可以使用化学标准电池,而用732A 732B作为便携电压标准来支持它们。732B可以在
相当长的期间被短路,而不会降低或丧失稳定性。在18°C28°C的温度范围内,它能完全
维持标称稳定性。
校准器在其半自动的原器校准过程中使用一个10 V的参考标准,Fluke 732B来建立外部
的电压溯源性。第7章描述了该过程。
732B-200 直流电压维护程序 (仅限U.S.A.) 1-12.
Fluke 732B-200直流电压维护程序为您的实验室提供了NIST溯源的 10V 校准不确定度,
0.6ppm
该程序可以用来维护您实验室内的732B。若要实现这一目的,将会:
1.福禄克将给您一个经过校准的福禄克特有的732B标准,以及全部必需的连接电缆和用于
将其和10V参考标准进行比较的操作说明。
2.您将为期5天的一个周期内的一系列读数返回至福禄克标准实验室。
3.福禄克标准实验室为您的10V标准分配一个相对于NIST法定伏特的值,并发送给您一个校
准报告。
742A 系列电阻标准 1-13.
校准器在其半自动的原器校准过程中使用110 k的电阻标准,如742A系列,来建立电
阻和电流的外部可溯源性。第7章描述了该过程。
742A电阻标准是由福禄克线绕精密电阻矩阵构成的,非常适合作为校准器的支持标准。电
阻漂移定额和其温度系数使其非常适合于在校准器的工作环境中进行搬移和操作。
1-6
宽带交流电压模块 (选件 5700A-03) 校准支持 1-14.
宽带交流模块(选件5700A-03)需要两种校准:增益和平坦度校准。增益常数的检查和重
新校准是正常的校准器半自动校准程序的一部分。
由于频率平坦度是由非常稳定的参数,如电路拓朴结构和介电常数,所决定的,所以宽带
交流模块的平坦度具有极好的长期稳定性。这种平坦度为宽带交流模块提供了只需每两年
一次的平坦度校准。很少需要进行平坦度校准,当将校准器返回至标准实验室进行周期性
校准时即可完成。5700A/5720A II
系列维修手册
包括了宽带平坦度校准。本手册的第7章包
括了宽带增益校准程序。
服务中心 1-15.
遍布全球的福禄克服务中心以多种方式支持福禄克设备和帮助客户(在5700A/5720A II
系列
维修手册
提供了全部的服务中心列表) 。多数服务中心具有经当地标准化组织认证的标准
和校准实验室。下列是多数服务中心所提供的部分服务内容:
修理所有福禄克产品并提供认可的溯源性校准。
为众多的非福禄克标准和校准器提供认可的溯源性校准。
全球范围内更换校准器内置模块。在美国境内典型的交付时间为48小时之内。
提供满足您特殊需要的具有灵活性的服务协议。包括简单的质保延长和现场支持协议。
多个区域都提供校准服务协议。
培训计划和研讨会,包括实验室计量学、系统应用和产品维护等。
应用帮助和咨询,包括系统设计、硬件的选择、定制软件、现场鉴定和安装等。
备件清单,包括推荐的备用部件和模块工具。
1-7
5700A/5720A II系列校准器的组成 1-16.
校准器在内部被设置为一个自动化校准系统,具有过程控制和一致性程序。内置微处理器
使用一个开关矩阵在模块之间导向信号,控制全部的功能和监控作业。完全自动的内部诊
断程序(包括模拟和数字)确保了操作上的完整性。
参考放大器维持着交流精度和稳定性。利用所有可用的先进技术,参考放大器具有最低的
噪声和最好的稳定性。校准器内部的参考放大器经过特定的选择程序,包括长时间老化,
来确保高可靠性,使性能满足技术指标。
校准器使用福禄克拥有专利的有效值传感器来进行实时的交流/直流比较测量,从而达到杰
出的交流电压准确度。福禄克有效值传感器在原理上非常类似于传统的温度-电压转换器,
但是它具有更小的时间常数,实际上没有逆向误差,具有更高的信噪比、更好的频率响应。
在校准器中,一个福禄克有效值传感器作为一个交流/直流变换标准在校准期间产生增益和
平坦度修正系数。第二个有效值传感器在运行期间连续监控和修正输出电压值。
一个拥有专利的26-bit的数-模转换器(dac)为校准器提供了精确的改变其输出的能力。
这是一个脉宽调制的dac,其典型的线性度优于满度的0.2 ppm。象使用其它内置功能一样,
dac的线性度在校准和模拟诊断期间会得到自动检查。
校准5700A/5720A II系列校准器 1-17.
在固定的时间间隔将校准器返回至标准实验室进行全面校准的传统方法是非常浪费时间
的。而且在置信度上也有差距。您必需依赖于厂商的技术参数来确定一个校准器在实验室
之外的运行环境中的性能是否是可接受的。另外,您必需假设漂移是足够可预测的,从而
其性能在限制范围之内。
5700A/5720A II系列校准器利用了福禄克在使用内部检查标准和测量系统上的设计突破性
技术。所以,利用福禄克提供的少数几个方便、便携、适应环境的标准,就完全可以校准
校准器。正如您在下边将要看到的那样,该程序可溯源至军事标准的要求。
在制造时,每一校准器都使用符合美国国家标准技术研究院的计量程序和校准标准进行了
校准和检验。包括一份证明文件。
建议每两年进行一次5700A/5720A II
系列维修手册
中所描述的校准检验程序,或者根据你
们指定的政策执行。该程序不包括任何调节。它只是保证内部程序受控能力,为内部各功
能,例如从未进行过调节和修正的交流功能,建立一个平行的外部溯源路径。
1-8
1-1图示说明了使用福禄克推荐的使用5700A/5720A II系列校准支持计划所能节省的时间
和费用。根据你们的政策的不同,您可以从一开始就决定进行更加频繁的校准检定。本校
准器使得这并非必需,并为您提供了收集利用传统的校准器所不能获得的数据。
1-1. 时间和费用:校准器的校准
1-9
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Fluke Calibration 5720A 取扱説明書

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