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iET PRS-300 Series Operation Manual

Programmable decade resistance substituters (ieee-488.2, ethernet and usb)
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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT
PRS-300 SERIES
Programmable
Decade Resistance Substituters
(IEEE-488.2, Ethernet and USB)
Operation Manual
IET LABS, INC.
www.ietlabs.com
TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988

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  • Page 1 ♦ ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT PRS-300 SERIES Programmable Decade Resistance Substituters (IEEE-488.2, Ethernet and USB) Operation Manual IET LABS, INC. www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988...
  • Page 2 IET LABS, INC. www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988...
  • Page 3 PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT PRS-300 SERIES Programmable Decade Resistance Substituters (IEEE-488.2, Ethernet and USB) Operation Manual Copyright © 2017 IET Labs, Inc. PRS-300 IM / June 2018 IET LABS, INC. www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988...
  • Page 4 ♦ ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT IET LABS, INC. www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988...
  • Page 5 IET specifi cations. If within one year after original shipment, it is found not to meet this standard, it will be repaired or, at the option 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 specifi...

  • Page 6: Warning

    WARNING OBSERVE ALL SAFETY RULES WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES. Dangerous voltages may be present inside this instrument. Do not open the case Refer servicing to qualifi ed personnel HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT WHENEVER HAZARDOUS VOLTAGES (>...

  • Page 7: Safety Summary

    To avoid the danger of introducing additional hazards, do not install substitute parts or perform unauthorized modifi cations to the instrument. Return the instrument to an IET Labs for service and repair to ensure that safety features are maintained in operational condition.

  • Page 8: Safety Symbols

    Safety Symbols General defi nitions of safety symbols used on the instrument or in manuals are listed below. Caution symbol: the product is marked with this symbol when it is necessary for the user to refer to the instruction manual. Hazardous voltage symbol: the product is marked with this symbol when high voltage maybe present on the product and an electrical shock hazard can exist.

  • Page 9: Table Of Contents

    PRS-300 Series CONTENTS WARRANTY ......................i WARNING ......................ii CAUTION ......................ii CONTENTS ......................iii FIGURES ......................iv TABLES ....................... iv Chapter 1: INTRODUCTION ................1 Chapter 2: SPECIFICATIONS ................3 2.1 Specifi cations .........................3 2.2 General Specifi cations and Stability ................4 2.2 Typical Label ........................5...
  • Page 10 PRS-300 Series 5.5 Web Browser Confi guration ..................15 5.6 VXI Confi guration Utility ....................17 5.7 Resetting Default Network Settings ................19 5.8 PRS Programming .......................19 Chapter 6: IEEE INTERFACE OPTION .............. 20 6.1 Introduction ........................20 6.2 Capabilities ........................20 6.3 Address Switch and Communications Settings ............20 6.4 IEEE Option Operation ....................20...

  • Page 11: Chapter 1: Introduction

    fi ve-way binding posts serve to minimize the precision manual and programmable decade thermal emf effects, which would produce er- substituter. The PRS-300 series provide direct rors in dc resistance measurements. resistance substitution as well as RTD (Resis- tance Temperature Detector) simulation.
  • Page 12 PRS-300. No other standards are required. The PRS-300 uses a microcontroller design to enhance the ease of use and calibration. It IET Labs offers the PRS-DMM Self provides direct resistance substitution as well Adjusting Software which works with the PRS-...

  • Page 13: Chapter 2: Specifications

    PRS-300 Series Chapter 2 SPECIFICATIONS For convenience to the user, the pertinent Terminals: specifi cations are given in an OPERATING Four low-emf, gold-plated, tellurium-cop per 5-way GUIDE, shown typically in Figure 2.1, affi xed bind ing posts are used for HI and LO ter mi nal pairs for CUR RENT and SENSE.

  • Page 14: General Specifi Cations And Stability

    Typical calibration interval 12 months. Adjustment can easily be accomplished us- ±(30 ppm + 300 μΩ) for values less than 1 MΩ ing IET’s PRS-DMM software. Adjusting the ±60 ppm for values of 1 MΩ and higher PRS-300 can improve accuracy.

  • Page 15: Specifications

    PRS-300 Series PRS-300 PROGRAMMABLE DECADE RESISTANCE SUBSTITUTER CONSULT INSTRUCTION MANUAL FOR PROPER INSTRUMENT OPERATION Accuracy: ±(0.007% + 1 mΩ) 2 and 4 Terminal at 23°C ±5°C Four low-emf, gold-plated, tellurium-cop per 5-way bind ing posts are used for HI and LO ter mi nal pairs for CUR RENT and SENSE. GND bind ing post is con nect ed Minimum setting: 0.1 Ω...
  • Page 16 PRS-300 Series SPECIFICATIONS...

  • Page 17: Chapter 3: Operation

    PRS-300 Series Chapter 3 OPERATION 2 Wire connection the gold shorting links 3.1 Initial inspection and setup must be used on the binding posts of the PRS- This instrument was tested and carefully 300 and the PRS-300 set to 2 Wire.

  • Page 18: Menu Structure

    PRS-300 Series Default values are: A: 10 kΩ │ B: 100 3.4 Menu Structure kΩ The main table below show menu struc- c) Press RCL then a number key (0 – 9) ture of the PRS-300 and basic function of each to display a user-defi...

  • Page 19: Setting A Resistance Value

    PRS-300 Series 3.4.1 Main Display 3.4.4 Standard Values Screen There are 4 selections available in the The main display shows the resistance STANDARD VALUES menu. The operation value in ohms or temperature value if tables of the standard values allows the PRS-300 to are used.

  • Page 20: Increment Incr Key

    PRS-300 Series next “preferred” resistance value. look like Figure 3-5 showing temperature on top line and resistance on the bottom line. RATIOMETRIC allows a custom toler- ance value to be entered by the user. The default value is 0.8% but can be set to the required value in %.

  • Page 21: Sto,Rcl Keys

    PRS-300 Series 3.4.8 STO, RCL Keys The STO and RCL key are used to store user defi ned values into memory. Press STO key followed by 0 to 9 in the numeric keypad stores the currently shown resistance value into that memory location.

  • Page 22: Environmental Conditions

    PRS-300 Series 3.6 Remote Operation This emf will not be refl ected if an ac When the PRS is in REMOTE with front measurement instrument is employed, and panel locked out an REM indication will be can be eliminated by using a meter with “True shown in the top right of the display.

  • Page 23: Chapter 4: Usb Interface

    PRS-300 Series Chapter 4 USB INTERFACE 4.1 Introduction The standard USB connection is via a 4.3.1 Standard USB Interface standard USB B female connector located on The standard USB interface uses a stan- the rear panel. This can be connected to a dard FTDI chip set.
  • Page 24 PRS-300 Series IEEE INTERFACE OPTION...

  • Page 25: Chapter 5: Ethernet Interface Option

    PRS-300 Series Chapter 5 ETHERNET INTERFACE OPTION 5.1 Ethernet Programming VXI-11 Background PRS units, with Ethernet interface op- VXI-11 is a communication standard devel- tion, come with Ethernet remote programming oped in conjunction with the VISA Specifi cation. capability accessed through the RJ45 LAN The specifi...

  • Page 26: Network Confi Guration

    PRS-300 Series ideal utility program for confi guring and testing the commands as outlined in Appendix A. PRS or any VXI-11 compatible instrument. Use When shipped, the boards are confi gured with the VXI-11kybd program to exercise the interface default settings outlined in Table 4-1 Default or to try out commands before using them in a Settings.
  • Page 27 PRS-300 Series a different range, record the current settings and temporarily set the following network values: Check ‘Use the following IP Address’ IP Address 192.168.1.254 Subnet mask 255.255.255.0 4. Open the browser and enter the default IP address of 192.168.1.254 for new units (or your last set address for older units) in the browser address window.
  • Page 28 PRS-300 Series 8. Your new settings have been saved in the board’s fl ash memory. You have to reboot the unit or power cycle it for the changes to take affect. Press the ‘Reboot’ button to reboot the unit now or the ‘Return to the Confi...

  • Page 29: Vxi Confi Guration Utility

    PRS-300 Series to connect the 9006 to the same hub or switch scans for all VXI-11 Services connected to the that the PC running the Confi guration Utility is local LAN or to your PC. (The 9006 is an RPC connected to as shown in Figure 4-7.

  • Page 30: Resetting Default Network Settings

    PRS-300 Series parameter. If you want to change the setting, The Digital I/O confi guration values are not type a new value in the New Value box and click affected by the LAN Reset operation. Enter. The program will send your setting to the board and read back the new setting.

  • Page 31: Chapter 6: Ieee Interface Option

    GPIB “Keyboard” Controller program - the ieee.org. easiest way to control GPIB devices without writing a program - is available from IET. This The SCPI standard provides a tree like GPIB Keyboard program automatically fi nds series of standard commands for program-...
  • Page 32 PRS-300 Series Unzip the fi le and follow instructions to install. Open the application. You may use the Find Listeners button to confi rm that the PRS unit is recognized. Other instruments may also be recognized at this time. IEEE INTERFACE OPTION...

  • Page 33: Chapter 7: Programming

    PRS-300 Series Chapter 7 PROGRAMMING Program Commands 7.1.1 Calibration Interval The standard USB interface can be pro- grammed via any of the commands listed in Appendix B. For USB and RS-232 interfaces, <lf>, <cr> or <crlf>, can be used as terminator. The device returns in this case <crlf>.
  • Page 34 PRS-300 Series PROGRAMMING...

  • Page 35: Chapter 8: Maintenance

    (12) months. This procedure may be carried out by the user, if a calibration Proper metrology practices should be fol- capability is available, by IET Labs, or by a lowed in performing this verifi cation. certifi ed calibration laboratory. If the user should choose to perform this procedure, then 8.1.3 Calibration Procedure...
  • Page 36 PRS-300 Series The PRS-300 consists 43 internal resistors 10.2 Ω which are combined in either series or paral- 20.0 Ω lel to achieve the programmed resistance. The 38.8 Ω gold shorting links must be removed on the 75.6 Ω binding posts of the PRS-300.
  • Page 37 At anytime pressing the MENU key will exit calibration without making any changes. IET Labs uses the Fluke 8508A, set to 7 ½ digits of resolution, during the adjustment process to ensure the PRS-300 meets specifi - cations.

  • Page 38: Chapter 9: Prs-Dmm Self Adjusting Software

    PRS-300 Series Chapter 9 PRS-DMM Self Adjusting Software Fluke 8508A 9.1 PRS-DMM Self Adjusting • GPIB cables as necessary Software 9.1.3 Software Installation 9.1.1 Overview Install the PRS-DMM Self Adjusting The PRS-DMM Self Adjusting Software is Software using the supplied USB stick. This...

  • Page 39: Prs-Dmm Main Screen

    PRS-300 Series PC via GPIB. Connect the PRS-300 to the PC SPEED . See section 9.3.5. via GPIB or USB. Make sure the addresses are different on DMM and PRS-300. 9.3 PRS-DMM Settings 9.2 PRS-DMM Main Screen 9.3.1 PRS-DMM Settings Screen...

  • Page 40: Meter Settings

    PRS-300 Series priate resolution 7 ½ digits for slow, 6 ½ digits for medium and fast, 4 wire measurements and autorange ON. The 8508A will also be confi gured for Low Current, Fast AD Integration OFF, and Analog Filter OFF.

  • Page 41: Prs-Dmm Speed

    PRS-300 Series 9.3.5 PRS-DMM Speed There are three selections for PRS-DMM Speed. These selection affect the accuracy from the target value and time to make the measure- ments. Slow measurements are made with 7 ½ digits of resolution, and measurements and ad- justments are made until the accuracy is better than ±20 ppm.
  • Page 42 PRS-300 Series PRS-DMM SOFTWARE...

  • Page 43: Appendix A: Scpi Command Reference

    PRS-300 Series Appendix A SCPI COMMAND REFERENCE SCPI is an acronym for “Standard Com- character mands for Programmable Instruments”. For terminates a ‘program message’. additional information or an on-line copy of Line feed (ASCII 10) and EOI this standard, see: terminates a RESPONSE MESSAGE.
  • Page 44 Semicolon ‘;’ is used to separate more commands written on one line. IEEE-488.2 Common Commands *IDN? Returns instrument identifi cation “IET Labs,PRS-300,<Serial Number>,<software version>” *ESR? Returns the read of the event status register. *STB? Returns the read of the status byte register.
  • Page 45 PRS-300 Series *PCS Power-on Status Clear Note: Remote command can start with or without * symbol for compatibility. 2.13 Formats IEEE 488.2 enables remote programming of all instrument functions, measurement conditions and comparator settings etc. Outputs include measurement conditions, open/short corrections, and measured values.
  • Page 46 PRS-300 Series None Command Error (Syntax) Execution Error (Over Range, etc.) No Contact Query Error None Operation Complete This register is read by executing an “ESR?” command, page 76 (except no *). Note that this is a destructive read. Reading the register clears it. Each bit of the Event register must be enabled in order to cause the ESB bit of the Status Register to be set.
  • Page 47 Appendix B PRS-300 USB and COMMON COMMANDS COMMON Commands: *IDN? Returns instrument identifi cation “IET Labs Inc.,PRS-300,<Serial number>,<software version>” Serial number in the form “Ax-xxxxxxxx” x = 0 to 9. A = Alpha can be A to Z. *TST? Self-Test Returns ASCII 0 or 1, 0 = bad or 1 = good *RST Returns PRS-300 to default “power on”...
  • Page 48 PRS-300 Series SYSTem:LOCal: This command places device in the LOCAL mode and unlocks all keys on front panel of the device. The Command is valid only for RS232, and USB interfaces. SYSTem:REMote This command places device in the REMOTE mode and locks all keys.
  • Page 49 PRS-300 Series SOURce:RESistance <display value> Sets output resistance of the PRS-300 if table is set to 0 or the resistance value corresponding to the display value for the table selected. Display value is in the form of number and decimal point representing desired display value.
  • Page 50 PRS-300 Series APPENDIX B...

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