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IET Labs PRS-200 Series Operation Manual

High precision manual or scpi programmable decade resistance substituters
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PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT
PRS-200 SERIES
High Precision
Manual or SCPI Programmable
Decade Resistance Substituters
(IEEE-488.2, RS232 or Ethernet)
Operation Manual
Copyright  2015 IET Labs, Inc.
PRS200 IEEE.2 im/May 2015
IET LABS, INC.
www.ietlabs.com
TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988

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  • Page 1 PRS-200 SERIES High Precision Manual or SCPI Programmable Decade Resistance Substituters (IEEE-488.2, RS232 or Ethernet) Operation Manual Copyright  2015 IET Labs, Inc. PRS200 IEEE.2 im/May 2015 IET LABS, INC. www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988...
  • Page 2 ♦ ♦ PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT IET LABS, INC. www.ietlabs.com TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988...
  • Page 3 WARRANTY We warrant that this product is free from defects in material and workmanship and, when properly used, will perform in accordance with applicable 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.

  • Page 4: 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 5: Table Of Contents

    CONTENTS WARRANTY ....................i WARNING ....................ii CAUTION ....................ii Chapter 1: INTRODUCTION ..............1 Chapter 2: SPECIFICATIONS ..............3 2.1 Model Configuration and specifications ............3 2.2 General specifications ..................4 Chapter 3: OPERATION ................7 3.1 Initial inspection and setup ................7 3.2 Connection ......................7 3.2.1 General Considerations ................7 3.2.2 Electrical Considerations .................7...

  • Page 6: Model Configuration And Specifications

    Chapter 6: SERIAL INTERFACE OPTION ..........18 6.1 Introduction ..................18 6.2 Capabilities ................... 18 6.3 Signal Interface and Communications Settings ......... 18 6.4 Serial Option Operation ................18 6.5 Serial Test Keyboard ..................19 Chapter 7: PROGRAMMING ..............20 7.1 Introduction ..................20 7.2 Command String Structure ..............

  • Page 7: Chapter 1: Introduction

    PRS-200 Series Chapter 1 INTRODUCTION The PRS Series (Figure 1.1) is a broad currents are passed through them. This is most line of high precision manual and program- often the case when only minute test currents mable decade substituters. They provide direct...
  • Page 8 PRS-200 Series This page is intentionally left blank. INTRODUCTION...
  • Page 9 PRS-200 Series PRS SERIES OPERATING GUIDE CONSULT INSTRUCTION MANUAL FOR PROPER INSTRUMENT OPERATION Resistance Type: Metal film. Range: 0 to 9,999,999 Ω, in 1 Ω steps. Accuracy: ±(0.1% + 30 mΩ), after subtraction of zero setting resistance; traceable to NIST.

  • Page 10: Chapter 2: Specifications

    PRS-200 Series Chapter 3 OPERATION The GND terminal on all models is con- 3.1 Initial inspection and setup nected to the case and to earth and chassis grounds. This may be used as a shield terminal. This instrument was tested and carefully inspected before shipment.

  • Page 11: Dial Setting

    PRS-200 Series If the effect of tens of microvolts is the front panel. significant to your application, connect to the Turn on the POWER switch. The instrument with low-thermal-emf materials only. Copper wire and copper alloys are rec- POWER indicator lamp, if present, ommended;...
  • Page 12 PRS-200 Series pedance value is supplied. The REMOTE and LOCAL LEDs always indicate which inter- face is controlling the impedance value. Setting the front panel REMOTE/LO- CAL switch to LOCAL overrides the RE- MOTE option settings and always sets the...

  • Page 13: Chapter 4: Ethernet Option

    PRS-200 Series Chapter 4 ETHERNET INTERFACE OPTION oped in conjunction with the VISA Specification. 4.1 Ethernet Programming The specification defines a VXI-11.3 interface like the PRS as an instrument which can be PRS units, with Ethernet interface option, controlled in Windows systems by programs...

  • Page 14: Network Configuration

    PRS-200 Series or to try out commands before using them in a Settings. program. The VXI-11kybd program can be found Command Function Factory Setting on the PRS product page at www.ietlabs.com IP Mode Static or DHCP Static Mode IP Address 0.0.0.0 to...
  • Page 15 PRS-200 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 16: Vxi Configuration Utility

    PRS-200 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 Configuration Page’...
  • Page 17 PRS-200 Series to connect the 8003 to the same hub or switch scans for all VXI-11 Services connected to the that the PC running the Configuration Utility is local LAN or to your PC. (The 8003 is an RPC connected to as shown in Figure 4-7. Temporarily...

  • Page 18: Resetting Default Network Settings

    PRS-200 Series parameter. If you want to change the setting, I/O configuration values are not affected by the type a new value in the New Value box and click LAN Reset operation. Enter. The program will send your setting to the board and read back the new setting.

  • Page 19: Chapter 5: Ieee Interface Option

    PRS-200 Series Chapter 5 IEEE INTERFACE OPTION 5.1 Introduction The IEEE interface option makes the PRS-200 a IEEE-488.2-1987 and SCPI 1994.0 compatible instrument. The IEEE STD 488.2 covers the electrical and mechanical bus specifications, and state diagrams for each GPIB bus function. It also establishes data formats, common commands for each 488.2 device and controller protocols.

  • Page 20: Ieee Option Operation

    IEEE To implement, request a download of interface if the REMOTE/LOCAL switch ICS_GPIBkybd_Install.zip from IET Labs is in the REMOTE position. Remote control Tech Support. may be dropped by issuing an IEEE GTL com- mand.

  • Page 21: Chapter 6: Serial Interface Option

    PRS-200 Series Chapter 6 SERIAL INTERFACE OPTION 6.1 Introduction The SERIAL option adds RS-232C and RS232 Signal Name In / Out SCPI 1994.0 capability to the PRS series in- Chassis  Send Data struments. The SCPI standard provides a tree ...

  • Page 22: Serial Test Keyboard

    This program works with ICS, Measurement Computing and National Instruments control- lers. To implement, request a download of: ICS_Serkybd_Install.zip, from IET Labs Tech Support Unzip the file and follow instructions to install. SERIAL INTERFACE OPTION...

  • Page 23: Chapter 7: Programming

    PRS-200 Series Chapter 7 PROGRAMMING 600,567.9 Ω SOURce:DATA 0006005679 7.1 Introduction 2,700,000 Ω SOURce:DATA 0027000000 PRS-200 units equipped with IEEE or Values sent for decades not implemented SERIAL options implement a consistent SCPI in the PRS are ignored. Setting a PRS with 4 interface.

  • Page 24: Advanced Programming Software Driver

    D6-0211201, D6 10 MegaOhm In our example above, the Manufacturer Note: micro and Mega Ohms use the section contains “IET Labs”, the Model section same suffix letter; case indicates magnitude. contains “PRS-200-F-6-100m-0-0”, the Serial Number section “D6-0211201” and the Revi-...
  • Page 25 PRS-200 Series Open Cicuit / Short Circuit Option: 7.3.3 Source Impedance not equipped Open Circuit option present Range test the desired output value Short Circuit option present against iMin and iMax. Coerce the supplied Both OC/SC present value to the max or min, return an error code, or use optionally equipped OC/SC features per 7.3.2 Instrument Initialization...
  • Page 26 PRS-200 Series Shift this value to align it with the loca- tion of the first decade in the PRS. locLSD prsCmd = “SOURce:DATA ” _ from our IDN string evaluation is 1, so: & format(iValue,“0000000000”) Example 1: Example 1: iValint = iValint * (1*10^(locLSD)) “SOURce:DATA 0000001235”...

  • Page 27: Chapter 8: Maintenance

    In the case of a resistance substituter, may be carried out by the user, if a calibration substantial Kelvin type 4-wire test terminals capability is available, by IET Labs, or by a should be used to obtain accurate low-resis- certified calibration laboratory. If the user tance readings.

  • Page 28: Appendix A: Scpi Command Reference

    PRS-200 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 29 PRS-200 Series Keywords shown inside braces [ ] are defaults, and are optional when constructing a PRO- GRAM MESSAGE. Commands not recognized have no effect on the unit’s operation and will set the correspond- ing bits in the Standard Event Status Register. SCPI commands that end with a question mark ‘?’ are queries.

  • Page 30: Appendix B: Ieee.2 Common Commands

    PRS-200 Series Appendix B IEEE-488.2 COMMON COMMANDS The PRS Series is compliant with the required input related commands such as SRQ complete command set defined in the IEEE- and TRG are implemented in the controller but 488.2 specification. As an output device, the have no affect on the operation of the instru- ment.

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