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NHR 4700 LXI Load Series User Manual

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4700 LXI DC Load Family
User Manual
Part No. 09-0299
REVISION P
July 10, 2019

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  • Page 1 4700 LXI DC Load Family User Manual Part No. 09-0299 REVISION P July 10, 2019...
  • Page 2 4700 LXI DC LOAD USER MANUAL Document History Rev X1 Preliminary 9/10/09 C.A.R. Rev A Updated to include PowerTouch 3/12/10 R.W. Rev B Add new safety limits 1/20/11 R.W. Rev C ECO 16813 6/27/11 T.C.F. Rev D ECO 16880 3/08/12 B.L.
  • Page 3 4700 LXI DC LOAD USER MANUAL Proprietary Rights Notice This document and the information that it contains are the property of NH Research, Incorporated. The rights to duplicate or otherwise copy this document, the rights to disclose the document and its information to others, and the right to use the information therein may be acquired only by written permission signed by a duly authorized officer of NH Research, Incorporated.
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  • Page 5: Table Of Contents

    4700 LXI DC LOAD USER MANUAL TABLE OF CONTENTS SAFETY ............................... 9 WARNING: LIVE CIRCUITS ......................9 DESCRIPTION ..........................11 ..........................11 ODEL ARIATION 4700 LXI L ..................11 AMILY OMMON EATURES 4700 LXI L - 1KW F ....................... 12 EATURES 4700 LXI L - 2KW F...
  • Page 6 4700 LXI DC LOAD USER MANUAL 3.18 4700 LXI 2KW M ....................22 EASUREMENTS 3.19 4700 LXI 3KW P ................. 23 ROGRAMMABLE EATURES 3.20 4700 LXI 3KW M ....................23 EASUREMENTS 3.21 4700 LXI 4KW P ................. 24 ROGRAMMABLE EATURES 3.22 4700 LXI 4KW M ....................
  • Page 7 4700 LXI DC LOAD USER MANUAL 4.1.7 200A C ....................50 URRENT IMIT WITCH 4.1.8 EPROM S ....................50 OOT FROM WITCH 4.1.9 RMT SEN OVPS C ..................50 ONNECTORS ........................51 ERIAL OMMUNICATION 4.2.1 ADDR S ........................51 WITCHES 4.2.2 ........................
  • Page 8 6.4.1 ....................... 77 DDING EVICES 6.4.2 – O ....................77 UTOFILL NLINE MODE ONLY 6.4.3 ....................77 PDATING EVICE IRMWARE NHR IVI I ......................79 NSTRUMENT ANEL 6.5.1 ..................... 80 PERATING ODES ECTION 6.5.2 ......................82 EASUREMENT ECTION 6.5.3 .......................... 83...

  • Page 9: Safety

    4700 LXI DC LOAD USER MANUAL 1. SAFETY 1.1 WARNING: LIVE CIRCUITS NO INTERNAL ADJUSTMENT OR COMPONENT REPLACEMENT IS ALLOWED BY NON-NH RESEARCH QUALIFIED PERSONNEL. COMPLETE THE FOLLOWING BEFORE ACCESSING THE INSTRUMENT INTERNALS:  REMOVE ALL EXTERNAL VOLTAGE SOURCES  DISCONNECT POWER CORD ...
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  • Page 11: Description

    4700 LXI DC LOAD USER MANUAL 2. DESCRIPTION The Model 4700 LXI electronic programmable DC load family includes many different size and power configurations. This document describes a single load configured with one Control circuit card and 1 to 36 Load Power circuit cards, comprising a 1 to 36 KW load instrument.

  • Page 12: 4700 Lxi Load - 1Kw Features

    4700 LXI DC LOAD USER MANUAL 2.3 4700 LXI Load - 1KW Features Power 1000W continuous Current 200A @ 1V, reduced current to 0.15V Resistance 5m to 180 ohms Voltage 0.15 to 120V Size 5.25 inch chassis 2.4 4700 LXI Load - 2KW Features Power 2000W continuous Current...

  • Page 13: 4700 Lxi Load - 18Kw Features

    4700 LXI DC LOAD USER MANUAL 2.10 4700 LXI Load – 18KW Features Power 18000W continuous Current 3600A @ 1V, reduced current to 0.15V Resistance 278 to 10 ohms Voltage 0.15 to 120V Size 31.5 inch rack height one Master 10.5 inch chassis, and two Auxiliary 10.5 inch chassis 2.11 4700 LXI Load - 24KW Features Power...

  • Page 14: 4760 Lxi Load - 1Kw Features

    4700 LXI DC LOAD USER MANUAL 2.14 4760 LXI Load - 1KW Features Power 1000W continuous Current 50A @ 7V, reduced current to 1V Resistance 0.20 to 7200 ohms Voltage 1 to 600V Size 5.25 inch chassis 2.15 4760 LXI Load - 2KW Features Power 2000W continuous Current...

  • Page 15: 4760 Lxi Load - 18Kw Features

    4700 LXI DC LOAD USER MANUAL 2.21 4760 LXI Load - 18KW Features Power 18000W continuous Current 900A @ 7V, reduced current to 1V Resistance 0.0111 to 400 ohms Voltage 1 to 600V Size 31.5 inch rack height one Master 10.5 inch chassis, and two Auxiliary 10.5 inch chassis 2.22 4760 LXI Load - 24KW Features Power...
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  • Page 17: Specifications

    4700 LXI DC LOAD USER MANUAL 3. SPECIFICATIONS Accuracies apply when settings and/or measurements are greater than 10% of the range. 3.1 Configuration Chassis with Controller circuit cards are designated Master Loads. Chassis with no Controller cards are designated Auxiliary Loads. A Master Load chassis can connect to up to six Auxiliary Load chassis to form a single hardware-paralleled instrument.

  • Page 18: Program Control

    4700 LXI DC LOAD USER MANUAL Control Interface Options:  100BaseT Ethernet direct to PC using network Cross-over cable or using network switch and standard network patch cable.  NH S6000 RS485 Master/Slave bus protocol COMM IN and COMM OUT connectors (for System use only).

  • Page 19: Calibration

    4700 LXI DC LOAD USER MANUAL 3.8 Calibration Closed cover, all adjustment done in software. Controller circuit card calibration factors are stored in FLASH. Individual Load Power circuit card calibration factors are stored in EEPROM. 3.9 Self-Test Power-up self-test is implemented in firmware and will report comprehensive error messages about the status of the input, output, and control board and protection mechanism.

  • Page 20: Supply Power

    4700 LXI DC LOAD USER MANUAL 3.13 Supply Power Operational from 115/230VAC  10% (non-destructive  25%), 47-63Hz, switch selectable. Operation from 100/200/215VAC  10% (non-destructive  25%), 47-63Hz, is selectable with internal jumper options – consult the factory. 47XX-1 1KW Load input power: 100watts 47XX-2 2KW Load input power: 120watts 47XX-3 3KW Load input power: 200watts 47XX-4 4KW Load input power: 220watts...

  • Page 21: 4700 Lxi 1Kw Programmable Features

    4700 LXI DC LOAD USER MANUAL 3.15 4700 LXI 1KW Programmable Features Constant Current Range 0 to 20A, 0 to 200A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 22: 4700 Lxi 2Kw Programmable Features

    4700 LXI DC LOAD USER MANUAL 3.17 4700 LXI 2KW Programmable Features Constant Current Range 0 to 40A, 0 to 400A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 23: 4700 Lxi 3Kw P

    4700 LXI DC LOAD USER MANUAL 3.19 4700 LXI 3KW Programmable Features Constant Current Range 0 to 60A, 0 to 600A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 24: 4700 Lxi 4Kw P

    4700 LXI DC LOAD USER MANUAL 3.21 4700 LXI 4KW Programmable Features Constant Current Range 0 to 80A, 0 to 800A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 25: 4700 Lxi 6Kw P

    4700 LXI DC LOAD USER MANUAL 3.23 4700 LXI 6KW Programmable Features Constant Current Range 0 to 120A, 0 to 1200A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 26: 4700 Lxi 9Kw P

    4700 LXI DC LOAD USER MANUAL 3.25 4700 LXI 9KW Programmable Features Constant Current Range 0 to 180A, 0 to 1800A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 27: 4700 Lxi 12Kw P

    4700 LXI DC LOAD USER MANUAL 3.27 4700 LXI 12KW Programmable Features Constant Current Range 0 to 240A, 0 to 2400A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 28: 4700 Lxi 18Kw P

    4700 LXI DC LOAD USER MANUAL 3.29 4700 LXI 18KW Programmable Features Constant Current Range 0 to 360A, 0 to 3600A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 29: 4700 Lxi 24Kw P

    4700 LXI DC LOAD USER MANUAL 3.31 4700 LXI 24KW Programmable Features Constant Current Range 0 to 48A, 0 to 4800A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 30: 4700 Lxi 30Kw P

    4700 LXI DC LOAD USER MANUAL 3.33 4700 LXI 30KW Programmable Features Constant Current Range 0 to 600A, 0 to 6000A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 31: 4700 Lxi 36Kw P

    4700 LXI DC LOAD USER MANUAL 3.35 4700 LXI 36KW Programmable Features Constant Current Range 0 to 720A, 0 to 7200A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 0.15 to 6.6V, 0.15 to 20V, 0.15 to 66V, 0.15 to 120V, Accuracy...

  • Page 32: 4700 Lxi Operating Envelope

    4700 LXI DC LOAD USER MANUAL 3.37 4700 LXI Operating Envelope 1000 100% 120% Amps 4700 LXI Operating Envelope 32 of 108...

  • Page 33: 4760 Lxi 1Kw P

    4700 LXI DC LOAD USER MANUAL 3.38 4760 LXI 1KW Programmable Features Constant Current Range 0 to 5A, 0 to 50A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 34: 4760 Lxi 2Kw P

    4700 LXI DC LOAD USER MANUAL 3.40 4760 LXI 2KW Programmable Features Constant Current Range 0 to 10A, 0 to 100A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 35: 4760 Lxi 3Kw P

    4700 LXI DC LOAD USER MANUAL 3.42 4760 LXI 3KW Programmable Features Constant Current Range 0 to 15A, 0 to 150A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 36: 4760 Lxi 4Kw P

    4700 LXI DC LOAD USER MANUAL 3.44 4760 LXI 4KW Programmable Features Constant Current Range 0 to 20A, 0 to 200A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 37: 4760 Lxi 6Kw P

    4700 LXI DC LOAD USER MANUAL 3.46 4760 LXI 6KW Programmable Features Constant Current Range 0 to 30A, 0 to 300A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 38: 4760 Lxi 9Kw P

    4700 LXI DC LOAD USER MANUAL 3.48 4760 LXI 9KW Programmable Features Constant Current Range 0 to 45A, 0 to 450A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 39: 4760 Lxi 12Kw P

    4700 LXI DC LOAD USER MANUAL 3.50 4760 LXI 12KW Programmable Features Constant Current Range 0 to 60A, 0 to 600A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 40: 4760 Lxi 18Kw P

    4700 LXI DC LOAD USER MANUAL 3.52 4760 LXI 18KW Programmable Features Constant Current Range 0 to 90A, 0 to 900A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 41: 4760 Lxi 24Kw P

    4700 LXI DC LOAD USER MANUAL 3.54 4760 LXI 24KW Programmable Features Constant Current Range 0 to 120A, 0 to 1200A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 42: 4760 Lxi 30Kw P

    4700 LXI DC LOAD USER MANUAL 3.56 4760 LXI 30KW Programmable Features Constant Current Range 0 to 150A, 0 to 1500A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 43: 4760 Lxi 36Kw P

    4700 LXI DC LOAD USER MANUAL 3.58 4760 LXI 36KW Programmable Features Constant Current Range 0 to 180A, 0 to 1800A Accuracy 0.12% of set + 0.08% of range Resolution 0.025% of range Constant Voltage Range 1 to 20V, 1 to 200V, 1 to 600V Accuracy 0.05% of set + 0.05% of range...

  • Page 44: 4760 Lxi Operating Envelope

    4700 LXI DC LOAD USER MANUAL 3.60 4760 LXI Operating Envelope 1000 100% 120% Amps 4760 LXI Operating Envelope 44 of 108...

  • Page 45: Block Diagram

    4700 LXI DC LOAD USER MANUAL 3.61 Block Diagram 4700 LXI DC Load Block Diagram 45 of 108...
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  • Page 47: Installation

    4700 LXI DC LOAD USER MANUAL 4. INSTALLATION 4.1 Hardware Installation Unpack the load. Save the packing material if a need arises to return the load. The load is designed to mount into a 19” rack. Optional slide rails are available for the 10.5 inch chassis.

  • Page 48: Load Positive And

    4700 LXI DC LOAD USER MANUAL Allow for 600CFM (3Kw & 6Kw) and 300CFM (1Kw & 2Kw) per chassis, of air to enter the front and exit the rear of the load. This must be cool air and not hot re-circulated air. 4.1.3.3 Adequate Floor Space As shown a minimum of 24”(61CM) floor space must be provided at the rear of the...

  • Page 49: Rear View

    4700 LXI DC LOAD USER MANUAL 4.1.5 Front View. Standard for a System Load 4.1.6 Rear View LOAD POSITIVE COMM COMM ____VDC PARALLEL IN PARALLEL OUT AC INPUT I RANGE ENABLE I CTRL I MON STAND ALONE CHASSIS GRND NETWORK LOAD NEGATIVE VOLTAGE SELECT PARALLEL...

  • Page 50: Witch

    4700 LXI DC LOAD USER MANUAL 4.1.7 200A Current Limit Switch If the load is always used at less than 200A, smaller wire may be used when a maximum current limit of 200A is selected. Switch 11 is located on the rear panel between the DOUT and SYNC connectors. Setting Switch 11 to 0 (factory default) allows full current operation and 1 limits current to 200A.

  • Page 51: Serial Communication

    Serial communication to other NHR devices is available through the COMM IN and COMM OUT. COMM IN / OUT is an NHR proprietary version of an RS-485 serial port. It allows multiple NHR products to be connected to a single COM port.

  • Page 52: Comm In Selects

    4.2.3 COMM IN Select Switch To enable the communication to other NHR devices enable the COMM IN using switch 9 on the Rear Panel. Setting 0 allows the use of COMM IN and setting 1 prohibits the use of COMM IN.

  • Page 53: Onnectors

    4.2.5 COMM IN / COMM OUT Connectors Located on the rear panel, this connector will mate with NHR type modules. This connection may be used for control of the load in a test system. If COMM IN is used, set switch 9 to 0.

  • Page 54: Ethernet Port Communication

    4700 LXI DC LOAD USER MANUAL 4.3 Ethernet Port Communication The Ethernet port option provides a 100BaseT LAN connection. As with any Ethernet network device, there are a variety of ways to connect to a Windows PC, and a variety of ways to assign an Ethernet address (IP address) to the device.

  • Page 55: Hardwired -Paralleled S

    4700 LXI DC LOAD USER MANUAL 4.4 Hardwired-Paralleled System One Master and up to five Auxiliary chassis may be paralleled. The Master is on top, Auxiliary 1 under the Master, Auxiliary 2 under Auxiliary 1 and so on to the last Auxiliary on the bottom.

  • Page 56: Paralleled System

    4700 LXI DC LOAD USER MANUAL 4.4.4 Paralleled System Rear View LOAD POSITIVE PARALLEL IN MASTER PARALLEL OUT LOAD NEGATIVE LOAD POSITIVE PARALLEL IN AUXILIARY 1 PARALLEL OUT LOAD NEGATIVE LOAD POSITIVE PARALLEL IN AUXILIARY 2 PARALLEL OUT LOAD NEGATIVE LOAD POSITIVE PARALLEL IN AUXILIARY 3...

  • Page 57: Syncoftware -Paralleled Sync

    4700 LXI DC LOAD USER MANUAL 4.4.5 Paralleled Connection and Wiring Each 4700 LXI/4760 LXI load is capable of extreme current. The loads must be wired appropriately to prevent wire damage. Appendix A shows how to wire the 4700 LXI/4760 LXI loads taking advantage of the full current rating of the load. As shown, the wires must be distributed along all the buss bars.

  • Page 58: Digital Inputs And Outputs

    4700 LXI DC LOAD USER MANUAL 4.6 Digital Inputs and Outputs 4.6.1 TRIGGER IN/OUT Connectors Located on the rear panel, these are the hardware trigger input and output connectors. Connector Description Trigger In Negative true TTL level signal with 1K Ohm pull up to +5V Trigger Out Negative true TTL level output with 39 Ohm series resistor Mating Connector type is:...

  • Page 59: Enable Connector

    4700 LXI DC LOAD USER MANUAL 4.6.4 ENABLE Connector A logic signal input to enable and disable the use of the external current control input. Applying a LOW (0 to 1.5v) and then a HIGH (3.5 to 5.0V) will enable the external current control input.

  • Page 60: Oftware Nstallation

    4700 LXI DC LOAD USER MANUAL 4.8 Software Installation 4.8.1 Software Installation from DVD Close all programs that are currently running in windows. Insert the DVD into the drive, if your drive is configured for Autoplay the setup program should start. If Autoplay is not enabled, you will need to view the contents of the disk and double click on ‘Setup’...

  • Page 61: Control Power Switch And 5.2 Error Indicator

    4700 LXI DC LOAD USER MANUAL 5. TOUCH PANEL OPERATION (STD FOR INSTRUMENT LOAD) 5.1 Control Power Switch and Indicator This switch/indicator is located on the front panel. When ON, this switch/indicator will light indicating fan, control power is applied, and the CPU is operating. 5.2 Error Indicator The error indicator is located on the front panel and indicates either a fuse has blown or the load has detected an over temperature condition.

  • Page 62: Editing A Value

    4700 LXI DC LOAD USER MANUAL 5.3.1 Editing a Value Simply touch the field you want to edit. A yellow box will be drawn around the selected field and its value will be modified by the editor. There are two styles of editor; a spin editor and a data entry editor.

  • Page 63: Control Bar

    4700 LXI DC LOAD USER MANUAL The data entry editor allows direct entry of a value. As the editor buttons are pressed, the new value is shown in the field being edited. The text background will be rose while it is being edited.

  • Page 64: Control Page

    4700 LXI DC LOAD USER MANUAL 5.5 Control Page 5.5.1 Operating Modes The control tab is where the operating modes are selected and what value they are set to. The 4700 family of loads can have any number of operating modes enabled at a time. Simply touch the button next to the value for the operating mode you want to enable or disable.

  • Page 65: Short Circuit

    4700 LXI DC LOAD USER MANUAL 5.5.1.1 Short Circuit Short circuit is an operating mode, but unlike the other modes, it is mutually exclusive with all other modes. If you go into short circuit mode the load will draw as much current as it can without exceeding its maximum rated power.

  • Page 66: Scope Page

    4700 LXI DC LOAD USER MANUAL 5.6 Scope Page The Scope page allows viewing and analysis of captured waveforms. 5.6.1 Setup Waveform Capture Setup options for the waveform capture on the setup page. 5.6.1.1 Acquisition Setup The Acquisition sub-tab defines the total time for the capture (aperture) and the number of samples over that time.

  • Page 67: Scope Setup

    4700 LXI DC LOAD USER MANUAL 5.6.1.2 Scope Setup WF1 and WF2 drop-down list lets you choose what waveform will be displayed as waveform #1 and #2 on the display. You can choose to display the voltage, current, or no waveform.

  • Page 68: Using The Scope Page

    4700 LXI DC LOAD USER MANUAL If waiting for a trigger, the capture will only continue when a trigger is received on the trigger in connection or a system trigger is sent. A system trigger will be sent when the Force Trig button is pressed.

  • Page 69: Macro

    4700 LXI DC LOAD USER MANUAL Touching anywhere within the waveform area will place a cursor. The cursor placed is always the selected (solid line) cursor. Touch again and the selected cursor will move to the new position. Touching the cursor information bar will cycle between cursors off, cursor 1 is selected, cursor 2 is selected, paired cursors.

  • Page 70: Steps

    4700 LXI DC LOAD USER MANUAL 5.7.2 Steps Use this screen to enter the steps value. Start by entering the values for step 1 then click Add for the next step. Maximum of 100 steps and maximum of 20 seconds of programming is allowed.

  • Page 71: Setup

    4700 LXI DC LOAD USER MANUAL Use this screen to save the newly created program on to a USB Flash device and or recall a previously saved program from a USB Flash device. USB port is provided on the lower left corner of the load’s front pannel. 5.8 Setup Pages 5.8.1 Slew Page Program the desired slew rate for each operating mode.

  • Page 72: Safety Page

    4700 LXI DC LOAD USER MANUAL CAUTION: if using the load with external sense selected but NOT hooked up correctly, there may be voltage present even when reading zero volts! OV Relay The overvoltage relay on the load board will be closed connecting any source connected as the overvoltage source to be put in parallel with the load.

  • Page 73: Acquisition And Scope

    4700 LXI DC LOAD USER MANUAL amount of overload. That is, the higher the overload, the faster the trip. The parameters that can be set are the trip value and the time value. Here is the approximate trip point curve of the algorithm. For example, for a 10A maximum current safety trip point and a time value of 5 seconds: If the load draws 20A (200% of trip value) it will trip off in about 3 s (65% of time value) If the load draws 15A (150% of trip value) it will trip off in about 5 s (100% of time value)

  • Page 74: More ... P Age

    4700 LXI DC LOAD USER MANUAL 5.9 More… Page 74 of 108...

  • Page 75: Computer Operation

    6.3 Port Configurator Interface The NHR Port Configuration Utility can be started from the start menu in the NH Research program group. In the NHR Port Configuration Utility, you describe to the software the communication ports for communicating with hardware devices.
  • Page 76 The Supported Devices frame contains the list of all NHR supported hardware drivers installed on your PC. This may only list a single device type like the NHR 4700 LXI DC Load or it may include other NHR supported hardware.

  • Page 77: Adding New Devices

    If you hook up additional NHR supported hardware to the system (like a second load), the use of the Search for Devices option in the Autofill menu of NHR Configurator is the recommended method for adding new hardware device drivers to the Configuration file.
  • Page 78 4700 LXI DC LOAD USER MANUAL Click the Yes button. This will take you into a dialog that shows the current firmware version for both DSP firmware and Network Micro firmware (NB). Select the appropriate tab then click “Update Firmware” then navigate and select the appropriate file for the update. DSP firmware uses the .hex file type and Network Micro firmware uses the .s19 file type.

  • Page 79: Nhr Ivi Instrument Panel

    4700 LXI DC LOAD USER MANUAL 6.5 NHR IVI Instrument Panel The NHR IVI Instrument Panel (referred to as the softpanel) can be started from the desktop icon or the start menu in the NH Research program group. The panel should look like this after loading…...

  • Page 80: Operating Modes Section

    The title bar and side bars contain the logical name of the DC Load you are currently controlling. This softpanel can control any number of physical loads, including NHR loads of different types. Use the Control section to set the various features of the selected load.
  • Page 81 4700 LXI DC LOAD USER MANUAL Important note: LED and Maximum Power Point Tracking modes are not available on the 47xx LXI loads. These modes will be disabled on the softpanel. Please refer to the Specification section to determine the capabilities of your load model This is the section used to control the principal operating characteristics of the load.

  • Page 82: Measurement Section

    4700 LXI DC LOAD USER MANUAL input. When the input is at zero volts, the load will be set to zero amps; 10 volts equals a current draw of 100% of the current range. Short circuit mode is higher priority than the other modes. If it is enabled the load will go into short circuit mode regardless of the other modes that are enabled.

  • Page 83: Setup Section

    4700 LXI DC LOAD USER MANUAL If the load supports Digital Inputs (DINs), the state of each input is displayed via an LED. When the LED is lit, the DIN is high; when off, the DIN is low. 6.5.3 Setup Section This section sets up the load’s operating ranges and controls whether the external sense is enabled and whether the overvoltage relay is engaged.

  • Page 84: Reset

    4700 LXI DC LOAD USER MANUAL 6.5.4.1 Reset Pressing reset will reset the selected load and set all settings back to default. After reset, the load will be off. 6.5.4.2 Reset All This button will reset all the modules in the panel to their default settings. 6.5.4.3 Capabilities Pressing device information will display a dialog that allows you to see the minimum and...

  • Page 85: Selftest

    4700 LXI DC LOAD USER MANUAL The Manufacturer Information section contains useful data such as the load’s serial number, hardware and firmware revision numbers, and date of last calibration. 6.5.4.4 Selftest Pressing self-test will reset the selected load then perform a built-in test. After the test is complete, a pop-up dialog appears informing the results of the test.

  • Page 86: Firmware Regulation Gain

    4700 LXI DC LOAD USER MANUAL If an advanced property is disabled, that feature is not available on the selected load hardware. The unique advanced properties are listed below. 6.5.4.5.1 Firmware Regulation Gain Regulation gain is used to control the rate at which the load attempts to regulate based on the loads measurements.

  • Page 87: Enable Fast Response Time Methods In Cv Mode

    4700 LXI DC LOAD USER MANUAL 6.5.4.5.2 Enable Fast Response Time Methods in CV Mode This property Controls the loop response rate of the load when constant voltage is the active mode. When enabled, the load will increase the speed at which it adjusts the voltage level.

  • Page 88: Oscilloscope

    4700 LXI DC LOAD USER MANUAL 6.5.4.6 Oscilloscope To display the oscilloscope panel for the selected load, press the Oscilloscope button. When you do, this panel is displayed. Operation of the oscilloscope panel is similar to a traditional scope. It is, however, limited to the capabilities of the load hardware.
  • Page 89 4700 LXI DC LOAD USER MANUAL If you want the sequence to repeat continuously, check the “Run Continuously” checkbox and it will continually repeat as long as the “Run Macro Program” button is pressed. If it is not checked, the sequence will run once each time the “Run Macro Program” button is pressed.
  • Page 90 4700 LXI DC LOAD USER MANUAL …then the maximum power will be limited to 500W regardless of the current setting in the transient program. The Load and Store buttons allow you to save macro sequences and recall them for use at a later time.

  • Page 91: Safety

    4700 LXI DC LOAD USER MANUAL 6.5.6 Safety (Note: depending on your monitor resolution, this section may be part of the Operations pop-up dialog.) On loads that support Safety Limits, pressing the “Limits” button displays the Safety setup page: The safety setup page allows you to set safety trip points. In essence, you are defining a “programmable circuit breaker”...
  • Page 92 4700 LXI DC LOAD USER MANUAL is usually better to set a small (non-zero) time to avoid false trips but still provide fast trip response. The safety trip algorithm mimics the behavior of a circuit breaker. Like a circuit breaker, the algorithm will not be affected by noise and the trip point delay will vary with the amount of overload.

  • Page 93: Digital Output Section

    Default” button in the “Save/Recall Settings” section. 6.5.7 Digital Output Section Many NHR load models provide general-purpose Digital Outputs, useful for fixture control. The state of the digital output matches that of the corresponding toggle switch. To set the digital high, simply move the switch to its up position (as shown in #2 above);...
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  • Page 95: Programming

    X.X\instr.lib. From a LabVIEW block diagram, traverse the Instrument I/O and Instrument Driver menus to find the NHR DC Load palette. The “Samples” folder contains several LabVIEW samples, along with the source “vi” for the softpanel. Alternately, a LabVIEW programmer can access the IVI-COM driver directly using LabVIEW’s support for ActiveX drivers.

  • Page 96: National Instruments Labwindows/Cvi

    4700 LXI DC LOAD USER MANUAL 7.5 National Instruments LabWindows/CVI A function panel providing access to the driver is included with the software installation. The “Samples” folder contains a LabWindows program that illustrates the use of the load driver in this environment. NOTE: depending upon where you install the files, you may have to browse for the instrument function panel (NHRDCLoad.fp, usually located in C:\Program Files\IVI Foundation\IVI\Drivers\NHRDCLoad) before the sample will compile.

  • Page 97: Appendix A - Multiload Connection & Wiring

    4700 LXI DC LOAD USER MANUAL APPENDIX A – MULTILOAD CONNECTION & WIRING 97 of 108...
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  • Page 103: Appendix B - Hardware Configuration

    4700 LXI DC LOAD USER MANUAL APPENDIX B – HARDWARE CONFIGURATION Connections Connect the PC LAN port to LAN-IN of the load using the supplied Cross-Over Ethernet cable. PC Setup 1. Open Windows Control Panel. 2. Open Network Connections. 3. Select and right click the Local Area Connection that is connected to the load and choose Properties (disable any other ports temporarily).
  • Page 104 4700 LXI DC LOAD USER MANUAL 5. Select “Use the following IP address” and type in the address as indicated above then click OK. This IP address must match the load’s IP address range; refer to “Important Network Configuration Information” sheet or the sticker on the back of the load to obtain this information.
  • Page 105 4700 LXI DC LOAD USER MANUAL 7. Launch System Configurator (Start > ALL Programs > NH Research > System Configurator). 8. Click File > New. 9. Click File > Save As. 10. Type in a proper name for this configuration and click Save. 11.
  • Page 106 4700 LXI DC LOAD USER MANUAL 16. Click OK to close the Port Configurator. 17. Launch the System Configurator. 18. Click Autofill > Setup. 19. Select and double click on “EthernetHost Port”. 20. With the load connected to the PC and powered click Autofill > Search for Devices. 21.
  • Page 107 4700 LXI DC LOAD USER MANUAL 22. Click OK and accept all the dialog boxes using the default names. 107 of 108...
  • Page 108 4700 LXI DC LOAD USER MANUAL 23. At the completion you will see one or more loads that match your system. 24. Click OK to close the System Configurator. 25. Launch the DC Load Panel and verify communication; i.e. enable the Metering. 108 of 108...

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