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742A Series

Resistance Standards

Instruction Manual

PN 850255
September 1988 Rev. 1, 4/89

© 1988-2015 Fluke Corporation. All rights reserved.
All product names are trademarks of their respective companies.

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Summary of Contents for 742A Series

Page 1: ...742A Series Resistance Standards Instruction Manual PN 850255 September 1988 Rev 1 4 89 1988 2015 Fluke Corporation All rights reserved All product names are trademarks of their respective companies...

Page 2: ...vice 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...

Page 3: ...Operating Notes 5 Connecting to the 742A Series 5 Cable Recommendations 5 Operating Temperature Range 6 How Temperature Correction Factors are Calculated 6 Storage Temperature Range 8 Care and Mainten...

Page 4: ...vironment within the range of 18 to 28 C The standards come with six month and one year uncertainty specifications Depending on the accuracy required a 742A can be recertified at intervals based on ei...

Page 5: ...mA 28 5 V 600 A 742A 100 k 100 k 4 0 ppm 6 0 ppm 2 5 ppm 2 0 ppm 1 mA 100 V 400 A 742A 1 M 1 M 6 0 ppm 8 0 ppm 5 0 ppm 2 0 ppm 100 A 100 V 100 A 742A 10 M 10 M 6 0 ppm 9 0 ppm 10 0 ppm 3 0 ppm 20 A 20...

Page 6: ...e constructed of low thermal emf material Features Figure 1 shows a front panel view Figure 2 shows a rear panel view Table 2 describes binding post functions Table 3 describes the rear panel labels F...

Page 7: ...and beta centered on 23 C Refer to How Temperature Correction Factors are Calculated further on in this manual for definitions of alpha and beta and the formula to predict exact resistance at differe...

Page 8: ...hese binding posts as described in Table 2 For the case to act as a shield the CHASSIS GROUND binding post must be connected to earth ground or instrumental guard at some point in a calibration system...

Page 9: ...entered on 23 C See Figure 2 for the label location The values of alpha and beta are individualized for each 742A Alpha and beta are established by measurement in the Fluke Primary Standards Lab at 18...

Page 10: ...from nominal in ppm 18 0 18 5 19 0 19 5 20 0 20 5 21 0 21 5 22 0 22 5 23 0 23 5 24 0 24 5 25 0 25 5 26 0 26 5 27 0 27 5 28 0 1 0000006 1 0000007 1 0000008 1 0000009 1 0000010 1 0000010 1 0000010 1 000...

Page 11: ...3 2 1 00000010 1 0000003 0 0000003 1 00000010 1 0000000 1 00000010 Rt R23 1 t 23 t 23 2 At 26 C R26 1 00000010 1 0 09 E 6 3 0 034 E 6 3 2 1 00000010 1 0 0000003 0 0000003 1 00000010 1 0 0000006 1 0000...

Page 12: ...remes as mentioned under Storage Temperature Range When you transport the standard it is recommended that you use the Option 742A 7002 Transit Case for shock and temperature protection The case holds...

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