IET Labs 1433 Series User And Service Manual Download Page 1 | Manualshive

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IET Labs 1433 Series User And Service Manual Download Page 1

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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT

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Email: [email protected]

TEL: (516) 334-5959 • FAX: (516) 334-5988

www.ietlabs.com

IET LABS, INC.

1433 SERIES

High-Accuracy

Decade Resistor

User and Service Manual

Copyright © 2018 IET Labs, Inc.

Visit www.ietlabs.com for manual revision updates

1433 im/October 2018
Effective for serial numbers beginning with “E”

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Summary of Contents for 1433 Series

Page 1: ...TEL 516 334 5959 FAX 516 334 5988 www ietlabs com IET LABS INC 1433 SERIES High Accuracy Decade Resistor User and Service Manual Copyright 2018 IET Labs Inc Visit www ietlabs com for manual revision updates 1433 im October 2018 Effective for serial numbers beginning with E ...

Page 2: ...Email info ietlabs com TEL 516 334 5959 FAX 516 334 5988 www ietlabs com IET LABS INC ...

Page 3: ... of IET replaced at no charge when returned to IET Changes in this product not approved by IET or application of voltages or currents greater than those allowed by the specifications shall void this warranty IET shall not be liable for any indirect special or consequential damages even if notice has been given to the possibility of such damages THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPR...

Page 4: ...S VOLTAGES 45 V ARE USED TAKE ALL MEASURES TO AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE CONDUCTORS WHEN USING THIS INSTRUMENT Use extreme caution when working with bare conductors or bus bars WHEN WORKING WITH HIGH VOLTAGES POST WARNING SIGNS AND KEEP UNREQUIRED PERSONNEL SAFELY AWAY CAUTION DO NOT APPLY ANY VOLTAGES OR CURRENTS TO THE TE...

Page 5: ...pection and Setup 5 3 2 Connection 5 3 2 1 General Considerations 5 3 2 2 Electrical Considerations 5 3 2 3 Four Wire Kelvin Lead Connections 6 3 2 4 Thermal emf Considerations 6 3 3 Dial Setting 6 Chapter 4 Maintanence 7 4 1 Preventative Maintenance 7 4 2 Calibration Interval 7 4 3 General Considerations 7 4 4 Calibration Procedure 8 4 5 Schematic 8 4 6 Replaceable Parts List 9 ...

Page 6: ... 1 1 1433 Series High Accuracy Decade Resistor 1 Figure 2 1 Sample operating guide affixed to unit 4 Figure 3 1 Optimal 4 Wire Kelvin Lead Connection 6 Figure 4 1 1433 Series Schematic Diagram 8 Table 4 1 Replacement List 9 Figure 4 2 1433 Replaceable Parts 9 ...

Page 7: ...roduct Overview The 1433 Decade Resistors are a family of instru ments providing a very broad choice of high perfor mance resistance sources Any number of decades from one to eleven is available The 1433 is a precision resistance source with ex cellent characteristics of stability temperature coef ficient power coefficient and frequency response There are over 30 models available covering a wide r...

Page 8: ... of the user the pertinent specifications are given in an OPERATING GUIDE affixed to the case of the instrument Accuracy 1 MΩ decades 0 01 2 mΩ 10 MΩ decades 0 03 after subtraction of zero resistance at 23 C traceable to SI Zero resistance 1 MΩ decades 1 mΩ per decade at dc 10 MΩ decade 3 mΩ at dc Max voltage to case 2000 V peak Terminals 3 Gold plated 5 way tellurium copper binding posts with low...

Page 9: ...1 M Ω 5 10 Ω 1433 P 1433 18 11 111 MΩ 5 100 Ω 1433 Y 1433 18A 111 11 MΩ 5 1 kΩ 1433 19 1 111 11 kΩ 6 0 001 Ω 1433 20 11 1111 kΩ 6 0 01 Ω 1433 W 1433 22 111 111 kΩ 6 0 1 Ω 1433 X 1433 24 1 111 11 MΩ 6 1 Ω 1433 B 1433 26 11 1111 MΩ 6 10 Ω 1433 Z 1433 27 111 111 MΩ 6 100 Ω 1433 28 11 111 11 kΩ 7 0 001 Ω 1433 29 111 1111 k Ω 7 0 01 Ω 1433 F 1433 31 1 111 111 MΩ 7 0 1 Ω 1433 G 1433 33 11 111 11 MΩ 7 1 ...

Page 10: ...teps 0 01 2 mΩ 10 MΩ Ω Ω Ω Ω steps 0 03 At 23 C after subtraction of zero resistance Traceable to SI Zero Resistance 1 MΩ Ω Ω Ω Ω steps 1 mΩ per decade 10 MΩ Ω Ω Ω Ω steps approx 3 mΩ Max Voltage to Case 2000 V peak Switch Type Multiple solid silver alloy contacts continuous rotation 11 positions marked 0 to 10 Operation If switches have not been operated for an extended period they should be rota...

Page 11: ...ad should be connected to the more protected of the two terminals H high or L low That would either be the terminal that is shorted to the case or the L terminal if neither is connected to the G case If switches have not been operated for an extended period they should be rotated a few times to assure that contact resistance is within specifications 3 2 2 Electrical Considerations In order to make...

Page 12: ...employed Such a connection minimizes the effects of contact resistance and ap proaches ideal performance If the four terminals are available as clamps similar to alligator clips they may be connected to the necks of the binding posts on a 3 terminal unit If the four wire connections are available separately the optimal connections are shown in Figure 3 1 and Figure3 2 HIGH LOW GND I I V V Ground F...

Page 13: ...the readings 3 3 Dial Setting Whenever the dials are used in positions 0 9 the resulting resistance is read directly The decimal point and the steps are clearly marked on the panel For additional flexibility and range each decade provides a 10 position setting This 10 position on any one decade equals the 1 position on the next higher decade It adds about 11 to the nominal total decade resistance ...

Page 14: ...th 4 2 Calibration Interval The recommended calibration interval for 1433 Series decade substituters is twelve 12 months The calibration procedure may be carried out by the user if a calibration capability is available by IET Labs or by a certified calibration laboratory If the user should choose to perform this procedure then the considerations below should be observed 4 3 General Considerations ...

Page 15: ...nd for the uncer tainty of the measuring instrument and setup 2 Confirm the zero resistance of the unit 3 Determine the allowable upper and lower limits for each resistance setting of each de cade based on the specified accuracy For the 1433 series these limits for any resistance R are R 0 0001 R 2 mΩ 4 Confirm that the resistances fall within these limits after subtraction of the zero resistance ...

Page 16: ...0 1 100 mΩ step Decade Switch Assembly Not Shown 1433 4000 X 1 1 Ω step Decade Switch Assembly Not Shown 1433 4000 X 10 10 Ω step Decade Switch Assembly Not Shown 1433 4000 X 100 100 Ω step Decade Switch Assembly Not Shown 1433 4000 X 1k 1 kΩ step Decade Switch Assembly Not Shown 1433 4000 X 10k 10 kΩ step Decade Switch Assembly Not Shown 1433 4000 X 100k 100 kΩ step Decade Switch Assembly Not Sho...

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