iET PRS-200 Series Operation Manual Download Page 1

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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT

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TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-

5988

www.ietlabs.com

534 Main Street, Westbury, NY 11590

IET LABS, INC.

PRS-200 SERIES

High Precision

Manual or Programmable

Decade Resistance Substituters

Operation Manual



2005 IET Labs, Inc.

PRS200 im/July2005

Summary of Contents for PRS-200 Series

Page 1: ...16 334 5959 800 899 8438 FAX 516 334 5988 www ietlabs com 534 Main Street Westbury NY 11590 IET LABS INC PRS 200 SERIES High Precision Manual or Programmable Decade Resistance Substituters Operation M...

Page 2: ......

Page 3: ...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 shal...

Page 4: ...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 worki...

Page 5: ...3 Dial Setting 7 3 4 Environmental Conditions 7 3 5 Local Operation 7 3 6 Remote Operation 7 Chapter 4 BCD INTERFACE OPTION 8 4 1 BCD Programming 8 Chapter 5 IEEE INTERFACE OPTION 10 5 1 Introduction...

Page 6: ...rammableDecadeResistanceSubstituter 1 Figure2 1TypicalOPERATINGGUIDEAffixedtoUnit 5 Tables Table 4 1 BCD INPUT Connector 8 Table 4 2 BCD INPUTConnector PinAssignments 9 Table 5 1 IEEE 488 Bus Function...

Page 7: ...i tion for each decade The PRS Series employs very low resistance low thermal emf relays with gold clad silver alloy con tacts A special design keeps contact resistance to a minimum The gold plating k...

Page 8: ...2 INTRODUCTION PRS Series This page is intentionally left blank...

Page 9: ...lowed to stabilize for one hour For maximum stability allow unit to warm up over two hours and keep free from mechanical disturbances Observeallsafety ruleswhenworkingwithhighvoltagesorlinevoltages Co...

Page 10: ...m perature difference between the leads of the relay and the contacts when temperature is applied to the coil This emf is of the order of 5 V per relay but is not usually additive The typical worst ca...

Page 11: ...tion is present the READY and LOCAL indicators should il luminate 2 SettheREMOTE LOCALswitchtoLOCAL 3 Connect any desired instrumentation to the front panel binding posts The GND termi nal may be conn...

Page 12: ...nd 22 on the BCD INPUT rear panel connector as shown in Table 4 1 Note that both pins must be set The REMOTE and LOCAL led s will respond accordingly Once the PRS is set to Re mote the thumbwheel swit...

Page 13: ...13 8 20 1 19 2 18 4 l 9 M 17 8 29 1 28 2 27 4 10 90 M 26 8 34 O p en circuit control 35 Short circuit control op tional 23 Earth ground 24 5V l0 mA maximum 25 Earth ground 21 LO CA L R EM O T E select...

Page 14: ...cessary it is strongly recommended that the user refer to documentation for background on the opera tionofthisinterface In particular the standard is avail able on line at http www ieee org or by cont...

Page 15: ...ter than n Mode Command Digit 0 4 8 or absent for NORMAL operation 1 5 or 9 for OPEN CIRCUIT operation optional 2 3 6 or 7 for SHORTCIRCUIT operation optional X or absent for units without either opti...

Page 16: ...he relays will be set as commanded although these values will be over ridden by the short or open circuit modes This fea ture may be used to provide a controlled transition between two resistance valu...

Page 17: ...ogram is given on the following page It is used by a MetraByte Corporation Model MBC 488 Controller Board This program first initializes the controller then sets the device to the REMOTE and LISTEN mo...

Page 18: ...FLAG 0 BRD 0 310 CALL IE488 CMD A FLAG BRD initialize 320 IF FLAG 0 THEN PRINT Error HEX FLAG in initialization STOP 330 340 INPUT Enter device number DN 350 360 Set device into REMOTE 370 CMD REMOTE...

Page 19: ...s task allowing for a band of uncertainty of the instrument itself consult IET Labs for information It is important to allow both the testing instrument and the PRS 200 Substituter to stabilize for a...

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