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iET PRS-330 series Operation Manual

Programmable decade resistance substituter (ieee-488.2, ethernet and usb)
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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT
PRS-330 SERIES
Programmable
Decade Resistance Substituter
(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-330 SERIES Programmable Decade Resistance Substituter (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-330 SERIES Programmable Decade Resistance Substituter (IEEE-488.2, Ethernet and USB) Operation Manual Copyright © 2019 IET Labs, Inc. PRS-330 IM / March 2019 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 IET Labs assumes no liability for the customer’s failure to comply with these precautions. The PRS-330 complies with INSTALLATION CATEGORY I as well as POLLUTION DEGREE 2 in IEC61010-1.

  • Page 7: Caution

    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 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-330 Series CONTENTS WARRANTY ......................i WARNING ......................ii CAUTION ......................ii CONTENTS ......................iii 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 Chapter 3: OPERATION ..................
  • Page 10 PRS-330 Series 3.7 Remote Operation ....................21 Chapter 4: USB Interface .................. 22 4.1 Introduction ........................22 4.2 Capabilities ........................22 4.3 USB Operation ......................22 4.3.1 USB Interface Drivers ..................22 Chapter 5: ETHERNET INTERFACE ..............23 5.1 Ethernet Programming ....................23 5.2 Network Setup ......................23 5.3 Ethernet Test Keyboard ....................23...
  • Page 11 PRS-330 Series 9.1.5 PC Connection Between DMM and PRS-330 ........40 9.2 PRS-DMM Main Screen ................ 40 9.2.1 PRS-DMM Main Screen Operation ..........40 9.3 PRS-DMM Settings ................40 9.3.1 PRS-DMM Settings Screen ............40 9.3.2 PRS Settings ................. 40 9.3.3 Meter Settings ................
  • Page 12 PRS-330 Series Page left intensionally blank Table of Contents...

  • Page 13: Chapter 1: Introduction

    20 MΩ, the precision manual and programmable decade PRS-330 may be used for exacting precision substituter. The PRS-330 series provide measurement applications requiring high direct resistance substitution as well as RTD accuracy, good stability, and low zero resistance.
  • Page 14 PRS-330. No other standards are required. IET Labs offers the PRS-DMM Self Adjusting Software which works with the PRS-330 and INTRODUCTION...

  • Page 15: Chapter 2: Specifications

    PRS-330 Series Chapter 2 SPECIFICATIONS For convenience to the user, the pertinent Terminals: specifi cations are given in an OPERATING Front and rear connections each consisting of 4 low-emf, gold-plated, tellurium-cop per 5-way bind ing GUIDE, shown typically in Figure 2.1, affi xed posts are used for HI and LO ter mi nal pairs for CUR- to the case of the instrument.

  • Page 16: General Specifi Cations And Stability

    See graph below for actual performance, Adjustment can easily and automatically be shown in blue, with 6 digit resolution accomplished using IET’s PRS-DMM software across resistance range. The red lines Adjusting the PRS-330 can improve accuracy represent tolerance of ±(30 ppm + 300 μΩ).
  • Page 17 PRS-330 Series PRS-330 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 Terminals: Minimum setting: 0.100 000 Ω 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.
  • Page 18 PRS-330 Series Page left intensionally blank SPECIFICATIONS...

  • Page 19: Chapter 3: Operation

    PRS-330 Series Chapter 3 OPERATION Mount the unit in a standard 19” rack if the rack 3.1 Initial inspection and setup mount option is specifi ed. This instrument was tested and carefully 3.1.5 Front and Rear Panel inspected before shipment. It should be in proper electrical and mechanical order upon receipt.

  • Page 20: Power Connections

    PRS-330 Series Power requirements: 90 - 264 Vac , 47 - 63 Hz., 30 W. Max. The rear panel has an IEC inlet module for con- nection to mains power, GPIB, USB and Ethernet Fuse interfaces and rear binding posts.

  • Page 21: Cleaning

    PRS-330 Series guide. binding posts of the PRS-330 when set to 2 Wire. See section 3.4.4 for more information There are no user serviceable parts inside the PRS-330. Servicing should be referred to qual- The GND terminal on all models is connected to ifi...

  • Page 22: Menu Structure

    PRS-330 Series 3.2.2 Electrical Considerations 3.4 Menu Structure The performance of the PRS-330 is directly The tables on the next few pages shows the menu affected by the quality of the connection to structure of the PRS-330. the system under test. This is particularly true Menu items with a “:”...
  • Page 23 PRS-330 Series 3.4 Menu Structure The tables on the next few pages shows the menu structure of the PRS-330. Menu items with a “:” allow selection of a value or feature when ENTER pressed. Menu items without “:” have a submenu with more than 1 item.
  • Page 24 PRS-330 Series PRS-330 Main Menu Resistance Settings Remote Communication Settings Instrument Calibration (only shown when Cal Enable pressed) About Main Resistance Menu Settings Connection Mode: 4-Wire or 2 Wire Terminal Selection: Front or Rear Standard Values RTD and Other Tables Settings...
  • Page 25 PRS-330 Series PRS-330 Main Menu Resistance Settings Remote Communication Settings Instrument Calibration (only shown when Cal Enable pressed) About Remote Main Communication Menu Settings IEEE Ethernet Remote Main Communication IEEE Menu Settings IEEE Address: 1 - 30 Remote Main Communication...
  • Page 26 PRS-330 Series Main Instrument Menu Calibration Full Calibration <Enter Password> Trace Calibration <Enter Password> Calibration History Main Instrument Calibration Menu Calibration History Calibrated Resistor: <R1 – R43> Main Menu>Calibration PRS-330 Main Menu Resistance Settings Remote Communication Settings Instrument Calibration (only shown when Cal Enable pressed)

  • Page 27: Home Screen

    PRS-330 Series 3.4.1 Home Screen of the value via the touch screen. During entry you can use softkeys to select Ω, kΩ or MΩ. The home screen shows the resistance value in ohms or temperature if RTD tables are used.

  • Page 28: Standard Values Menu

    PRS-330 Series between previous value and the new value will either be a SHORT, OPEN or undetermined in default switching case. Standard Values and RTD and Other Tables Settings have separate menus which are described in the sections below. 3.4.5 Standard Values Menu...
  • Page 29 PRS-330 Series The Standard Value: allows the PRS-330 to be 0.8% but can be set to the required value in %. used as an automated resistance carousel with built-in EIA “preferred value” resistance tables of 1% (E96), 5% (E24), 10% (E12) increments or RATIOMETRIC user specifi...

  • Page 30: Decade Value

    PRS-330 Series 3.4.5.3 Decade Value to change between the various RTD tables. Select None for no RTD table and resistance in The Decade Value: selection allows the resistance Ωs will be displayed. value to increment by a decade value in Ωs each time the INC and DEC key is pressed.

  • Page 31: User Select Rtd Menu

    PRS-330 Series Once the table is selected the home screen will change for example to temperature on the display see Figure 3-6. Figure 3-8 Select Table Name Pressing ADD key opens an entry screen so that a name of the table can be entered.

  • Page 32: Ieee Interface Menu

    PRS-330 Series Figure 3-8 Remote Communications Settings Figure 3-10 Ethernet Interface Menu There are two selections IEEE and Ethernet. There are 3 selections: IP Address:, Network Highlight the interface and press ENTER to see Gateway:, Network Mask:, which can be the settings for the interface.

  • Page 33: Thermal Emf Considerations

    PRS-330 Series The only item that can be highlighted and 3.6 Environmental Conditions changed is Reset to Defaults. Pressing ENTER will allow the user to select YES or NO to reset The PRS is built, calibrated and intended for all parameters back to default. The only item this use in a laboratory environment with a nominal reset does not affect is Calibration data.
  • Page 34 PRS-330 Series Page left intensionally blank OPERATION...

  • Page 35: Chapter 4: Usb Interface

    PRS-330 Series Chapter 4 USB INTERFACE 4.3.1 USB Interface Drivers 4.1 Introduction The USB connection is via a standard USB B Normally when the PRS-330 is connected to a female connector located on the rear panel. This computer using the USB port, Windows 7 and can be connected to a PC via a standard USB 2.0...
  • Page 36 PRS-330 Series Page left intensionally blank USB INTERFACE...

  • Page 37: Chapter 5: Ethernet Interface

    PRS-330 Series Chapter 5 ETHERNET INTERFACE counter. 5.1 Ethernet Programming VXI-11 Background The PRS-330 comes with Ethernet remote VXI-11 is a communication standard developed programming capability accessed through the in conjunction with the VISA Specifi cation. The RJ45 LAN connector. The connector is a RJ45 specifi...

  • Page 38: Network Confi Guration

    PRS-330 Series network settings. If you program with Java then you can write a PRS control program that can be easily moved to many different operating systems. VXI-11 Keyboard Control Program provides interactive control of VXI-11 instruments from the computer keyboard without having to write a The Java jGpibEnet project on SourceForge was program.

  • Page 39: Web Browser Confi Guration

    PRS-330 Series confi gurations, wait 3 seconds for the settings to save. Power-start the PRS and wait 10 seconds for the remote control interface to load, then on the browser attempt to load the welcome page at the IP address.
  • Page 40 PRS-330 Series should appear in your browser. Flash’ key when done. A Confi rmation Page similar to the one shown in Figure 4-5 will appear in your browser. Figure 4-3 9006 Welcome Page Figure 4-5 9006 Confi rmation Page 8. Your new settings have been saved in the board’s fl...
  • Page 41 PRS-330 Series 1. Connect the board directly to the WIN32 PC Places and click on Properties. Right-click on that will be running the Confi guration Utility. Local Area Connection and click Properties. Disconnect the PC from the company network Highlight Internet Protocol (TCP/IP) and click and use the supplied Ethernet Crossover Cable to Properties.

  • Page 42: Vxi Confi Guration Utility

    PRS-330 Series 10. When done, the Save Confi guration key is enabled if you changed any settings. Click the Save Confi guration key to save the values in the board’s fl ash memory. If you did not make any changes you can just exit the program.
  • Page 43 PRS-330 Series The Digital I/O confi guration values are not affected by the LAN Reset operation. Command Function Factory Setting IP Mode Static or DHCP Static Mode IP Address 0.0.0.0 to 192.168.0.2 255.255.255.255.0 Net Mask 0.0.0.0 to 255.255.255.0 255.255.255.255.0 COMM Timeout Sets socket timeout 120 sec.
  • Page 44 PRS-330 Series ETHERNET INTERFACE OPTION...

  • Page 45: Chapter 6: Ieee Interface

    GPIB devices without writing same program. SCPI information and a command a program - is available from IET. This GPIB reference are located in Appendix A. Keyboard program automatically finds your device at start-up and it lets you enter just the data Other tutorials are available on-line;...
  • Page 46 PRS-330 Series Unzip the fi le and follow instructions to install. Open the application. You may use the Find Listeners key to confi rm that the PRS unit is recognized. Other instruments may also be recognized at this time. IEEE INTERFACE OPTION...

  • Page 47: Chapter 7: Programming

    PRS-330 Series Chapter 7 PROGRAMMING Program Commands The USB, Ethernet and IEEE interface can be programmed via any of the commands listed in Appendix A and B. For USB <lf>, <cr> or <crlf>, can be used as terminator. The device returns in this case <crlf>.
  • Page 48 PRS-330 Series Page left intensionally blank PROGRAMMING...

  • Page 49: Chapter 8: Maintenance

    Proper metrology practices should be followed by the user, if a calibration capability is available, in performing this verifi cation. by IET Labs, or by a certified calibration laboratory. If the user should choose to perform 8.1.3 Calibration Procedure this procedure, then the considerations below should be observed.
  • Page 50 PRS-330 Series the memory of the PRS-330. The measured values of the resistors are used in an algorithm Resistance Nominal Resistance to determine which resistors are used to create Number Value the programmed resistance value. 0.17 Ω 0.35 Ω In addition to the 43 resistors the residual 0.7 Ω...

  • Page 51: Calibration Menu And Process

    Full Calibration and pressing the ENTER key. A password is required as shown in Figure 8-3. Figure 8-4 shows entry of the password which is IET. note tapping twice on the alpha keys will Figure 8-1 Main Menu with CAL ENABLE select the second letter.

  • Page 52: Calibration History

    DMM using a 4 terminal Kelvin connection, making sure the shorting links are not on the binding post. IET Labs uses the Fluke 8508A, set to 7 ½ digits of resolution, during the adjustment process to ensure the PRS-330 meets specifi cations.
  • Page 53 PRS-330 Series be viewed in this menu. If exporting this data is required see Appendix B remote commands which allow this data to be transferred to a PC. Figure 8-6 Calibration History Menu From the Instrument Calibration menu select Calibration History and press ENTER.The menu in Figure 8-6 will be shown.

  • Page 54: Replaceable Parts List

    PRS-330 Series 8.2 Replaceable Parts List Model Ref IET Pt No Description BP-1000-RD Binding Post, Red BP-1000-BK Binding Post, Black BP-1000-GN Binding Post, Green Not Shown PRS-330-Bail-Feet kit 4 x feet and bale kit Not Shown PRS-330 Relay Board Relay Board Complete...

  • Page 55: Chapter 9: Prs-Dmm Self Adjusting Software

    PRS-330 Series Chapter 9 PRS-DMM Self Adjusting Software • Kelvin cables between PRS-330 and 9.1 PRS-DMM Self Adjusting Software Fluke 8508A • GPIB cables as necessary 9.1.1 Overview 9.1.3 Software Installation The PRS-DMM Self Adjusting Software is a Install the PRS-DMM Self Adjusting Software Windows based software package using LabVIEW using the supplied USB stick.

  • Page 56: Prs-Dmm Main Screen

    PRS-330 Series 9.1.5 Connections of PRS and .DMM Clicking on the Calibrate key starts the process of of adjusting. The DMM Measures and adjusts the PRS-330 to achieve the closest value possible Connect the 3458A or 8508A DMM to the PC via to the entered target value.

  • Page 57: Meter Settings

    PRS-330 Series will be shown in the white box along with a Success indication. Select the GPIB address and then click the Initialize key. The IDN string will be shown in the white box along with a Success indication. Click Exit key to return to Setting Screen once PRS has been detected.

  • Page 58: Adjust Prs

    PRS-330 Series 9.3.4 Adjust PRS Clicking on the Adjust PRS key will step the operator through the PRS-330 adjustment procedure. The procedure consists of measuring all 43 internal resistors using the DMM and storing the actual resistance values into a table.

  • Page 59: Appendix A: Scpi Command Reference

    PRS-330 Series Appendix A SCPI COMMAND REFERENCE SCPI is an acronym for “Standard Commands for in a common manner. This gives all instruments Programmable Instruments”. For additional in- a common “look and feel”. SCPI commands are formation or an on-line copy of this standard, see: not case-sensitive.
  • Page 60 PRS-330 Series IEEE-488.2 Common Commands *SRE Set the service request enable register value *RST *IDN? Reset the buffer Returns instrument identifi cation “IET *TST? Labs,PRS-330,<Serial Number>,<software Self test query version>” *CLS *ESR? Clear standard event status register Returns the read of the event status register.
  • Page 61 Appendix B PRS-330 COMMON COMMANDS COMMON Commands: *IDN? Returns instrument identifi cation “IET Labs Inc.,PRS-330,<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-330 to default “power on”...
  • Page 62 PRS-330 Series 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. The Command is valid only for RS232, and USB interfaces.
  • Page 63 PRS-330 Series SOURCE Commands SOURce:DATA <display value> Sets output resistance of the PRS-330 if table is set to None or the resistance value corresponding to the display value for the table selected. Display value in form of number and decimal point representing desired display value.
  • Page 64 PRS-330 Series CONFIGURE Commands General CONFigure:SELect <2 or 4> Sets PRS-330 for 2 wire or 4 wire mode. CONFigure:SELect ? Returns number corresponding to 2 wire or 4 wire mode. 2 = 2 wire and 4 = 4 wire CONFigure:TERMinal <FRONT, REAR> Selects front or rear binding posts...
  • Page 65 PRS-330 Series CONFIGURE IEEE/Ethernet CONFigure:IEEEAddress <number> Range 1 to 30 CONFigure:IEEEAddress? Returns <number> corresponding to IEEE address 1 to 30 CONFigure:ETHErnet:IP <string> with format of ###.###.###.### where # is 0 to 9 CONFigure:ETHErnet:IP? Returns IP address as a string ###.###.###.### CONFigure:ETHErnet:GATE <string>...
  • Page 66 PRS-330 Series CONFIGURE Tables CONFigure:RTD <P100C, P100F, P1000C,P1000F> CONFigure:RTD? Returns which RTD table is selected P100C, P100F, P1000C, or P1000F CONFigure:TABLe:SELect <number> Selects Table to be used, <number> is 0 to 9. 0 is no table with display shown in ohms and 1 , 2, 3 and 4 are predefi ned and 5 to 9 are user defi ned tables CONFigure:TABLe:SELect? Returns table number that is selected CONFigure:TABLe:NAME <name>...
  • Page 67 PRS-330 Series APPENDIX B...

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