AMETEK Ls Series User Manual

Lx \ Ls Series

AC Power Source

User Manual

Contact Information

Telephone: 800 733 5427 (toll free in North America) 858 450 0085 (direct) Fax: 858 458 0267 Email: Domestic Sales: domorders.sd@ametek.com International Sales: intlorders.sd@ametek.com Customer Service: service.ppd@ametek.com

Web: www.programmablepower.com

March 2010 Document No. 7004-960 Rev. H

User Manual Lx / Ls Series

Refers to Lx Series AC Power Source/Analyzers and Ls Series AC Power Sources.

Models:

Single chassis: 3000Lx, 4500Lx, 6000Lx Multiple chassis: 9000Lx/2, 12000Lx/2, 13500Lx/3, 18000Lx/3

Single chassis: 3000Ls, 4500Ls, 6000Ls Multiple chassis: 9000Ls/2, 12000Ls/2, 13500Ls/3, 18000Ls/3

Manual revision: H, March 2011

About AMETEK

AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design and manufacture of precision, programmable power supplies for R&D, test and measurement, process control, power bus simulation and power conditioning applications across diverse industrial segments. From bench top supplies to rack-mounted industrial power subsystems, AMETEK Programmable Power is the proud manufacturer of Elgar, Sorensen, California Instruments and Power Ten brand power supplies.

AMETEK, Inc. is a leading global manufacturer of electronic instruments and electromechanical devices with annualized sales of $2.5 billion. The Company has over 11,000 colleagues working at more than 80 manufacturing facilities and more than 80 sales and service centers in the United States and around the world.

Trademarks

AMETEK is a registered trademark of AMETEK, Inc. Other trademarks, registered trademarks, and product names are the property of their respective owners and are used herein for identification purposes only.

Notice of Copyright

Lx\Ls Series AC Power Source, User Manual

rights reserved.

Exclusion for Documentation

UNLESS SPECIFICALLY AGREED TO IN WRITING, AMETEK PROGRAMMABLE POWER, INC. (“AMETEK”):

(a) MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY OF ANY

TECHNICAL OR OTHER INFORMATION PROVIDED IN ITS MANUALS OR OTHER DOCUMENTATION.

(b) ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES, COSTS OR

EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION. THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S RISK, AND

ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED AMETEK CONTENT IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION, WHICH IS POSTED AT WWW.PROGRAMMABLEPOWER.COM.

Date and Revision

March 2011 Revision H

Part Number

7004-960

Contact Information

Telephone: 800 733 5427 (toll free in North America) 858 450 0085 (direct) Fax: 858 458 0267 Email: sales@programmablepower.com service@programmablepower.com Web: www.programmablepower.com

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WARNING

Hazardous voltages may be present when covers are removed. Qualified personnel must use extreme caution when servicing this equipment. Circuit boards, test points, and output voltages also may be floating above (below) chassis ground.

WARNING

The equipment used contains ESD sensitive ports. When installing equipment, follow ESD Safety Procedures. Electrostatic discharges might cause damage to the equipment.

Important Safety Instructions

Before applying power to the system, verify that your product is configured properly for your particular application.

Only qualified personnel who deal with attendant hazards in power supplies, are allowed to perform installation and servicing.

Ensure that the AC power line ground is connected properly to the Power Rack input connector or chassis. Similarly, other power ground lines including those to application and maintenance equipment must be grounded properly for both personnel and equipment safety.

Always ensure that facility AC input power is de-energized prior to connecting or disconnecting any cable.

In normal operation, the operator does not have access to hazardous voltages within the chassis. However, depending on the user’s application configuration, HIGH VOLTAGES HAZARDOUS TO HUMAN SAFETY may be normally generated on the output terminals. The customer/user must ensure that the output power lines are labeled properly as to the safety hazards and that any inadvertent contact with hazardous voltages is eliminated.

Guard against risks of electrical shock during open cover checks by not touching any portion of the electrical circuits. Even when power is off, capacitors may retain an electrical charge. Use safety glasses during open cover checks to avoid personal injury by any sudden component failure.

Neither AMETEK Programmable Power Inc., San Diego, California, USA, nor any of the subsidiary sales organizations can accept any responsibility for personnel, material or inconsequential injury, loss or damage that results from improper use of the equipment and accessories.

SAFETY SYMBOLS

iii

Product Family: Lx \ Ls Series

Warranty Period: One Year

WARRANTY TERMS

AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the Product stated above, and if the Buyer discovers and notifies AMETEK in writing of any defect in material or workmanship within the applicable warranty period stated above, then AMETEK may, at its option: repair or replace the Product; or issue a credit note for the defective Product; or provide the Buyer with replacement parts for the Product.

The Buyer will, at its expense, return the defective Product or parts thereof to AMETEK in accordance with the return procedure specified below. AMETEK will, at its expense, deliver the repaired or replaced Product or parts to the Buyer. Any warranty of AMETEK will not apply if the Buyer is in default under the Purchase Order Agreement or where the Product or any part thereof:

is damaged by misuse, accident, negligence or failure to maintain the same as

specified or required by AMETEK;

is damaged by modifications, alterations or attachments thereto which are not

authorized by AMETEK;

is installed or operated contrary to the instructions of AMETEK; is opened, modified or disassembled in any way without AMETEK’s consent; or is used in combination with items, articles or materials not authorized by AMETEK.

The Buyer may not assert any claim that the Products are not in conformity with any warranty until the Buyer has made all payments to AMETEK provided for in the Purchase Order Agreement.

PRODUCT RETURN PROCEDURE

1. Request a Return Material Authorization (RMA) number from the repair facility (must be

done in the country in which it was purchased):

In the USA, contact the AMETEK Repair Department prior to the return of the

product to AMETEK for repair: Telephone: 800-733-5427, ext. 2295 or ext. 2463 (toll free North America)

858-450-0085, ext. 2295 or ext. 2463 (direct)

Outside the United States, contact the nearest Authorized Service Center

(ASC). A full listing can be found either through your local distributor or our website, www.programmablepower.com, by clicking Support and going to the Service Centers tab.

2. When requesting an RMA, have the following information ready:

Model number Serial number Description of the problem

NOTE: Unauthorized returns will not be accepted and will be returned at the shipper’s expense.

NOTE: A returned product found upon inspection by AMETEK, to be in specification is subject to

an evaluation fee and applicable freight charges.

User Manual Lx / Ls Series

Table of Contents

1. Introduction ..................................................................................................................................... 9

1.1 General Description ........................................................................................................................... 9

1.2 Lx Series and Ls Series Differences ................................................................................................. 9

1.3 Manual organization and format ...................................................................................................... 10

2. Specifications ................................................................................................................................ 11

2.1 Electrical .......................................................................................................................................... 11

2.2 Mechanical ...................................................................................................................................... 22

2.3 Environmental .................................................................................................................................. 22

2.4 Front Panel Controls ........................................................................................................................ 23

2.5 Special Features.............................................................................................................................. 23

2.6 Available Options – Lx Series .......................................................................................................... 24

2.7 Available Options – Ls Series .......................................................................................................... 30

3. Unpacking and Installation ............................................................................................................ 35

3.1 Unpacking........................................................................................................................................ 35

3.2 Power Requirements ....................................................................................................................... 35

3.3 Mechanical Installation .................................................................................................................... 35

3.4 AC Input Wiring - INPUT ................................................................................................................. 38

3.5 Output Connections ......................................................................................................................... 38

3.6 Connectors - Rear Panel ................................................................................................................. 44

3.7 Basic Initial Functional Test ............................................................................................................. 49

3.8 Multi-box Configurations (-MB Option) ............................................................................................ 51

3.9 Clock and Lock Mode (-LKM/-LKS Option) ...................................................................................... 52

4. Front Panel Operation ................................................................................................................... 54

4.1 Tour of the Front Panel .................................................................................................................... 54

4.2 Menu Structure ................................................................................................................................ 60

4.3 Output Programming ....................................................................................................................... 80

4.4 Waveform Management .................................................................................................................. 82

4.5 Measurements ................................................................................................................................. 85

4.6 Harmonic Analysis ........................................................................................................................... 86

4.7 Transient Programming ................................................................ ................................ ................... 86

4.8 Setting the Power-on Initialization Values ....................................................................................... 91

4.9 Remote Inhibit Function................................................................................................................... 92

5. Principle of Operation ................................................................................................................... 93

5.1 Overall Description .......................................................................................................................... 93

5.2 Controller Assembly ........................................................................................................................ 93

6. Calibration ..................................................................................................................................... 95

6.1 Recommended Calibration Equipment ............................................................................................ 95

6.2 Calibration Screens ......................................................................................................................... 95

6.3 Measurement Calibration ................................................................................................................ 96

6.4 Output Calibration ............................................................................................................................ 97

6.5 Phase Offset Calibration ................................................................ ................................ .................. 98

6.6 Non-Routine Output Gain Calibration .............................................................................................. 99

6.7 Non-Routine Amplifier Balance Adjustment .................................................................................. 101

User Manual Lx / Ls Series

7. Service ........................................................................................................................................ 102

7.1 Cleaning ........................................................................................................................................ 102

7.2 General ......................................................................................................................................... 102

7.3 Basic operation ............................................................................................................................. 102

7.4 Isolating amplifier failures in multi-box systems ............................................................................ 104

7.5 Advanced Troubleshooting. .......................................................................................................... 105

7.6 Factory Assistance ........................................................................................................................ 105

7.7 Fuses ............................................................................................................................................ 105

7.8 Replaceable Parts ......................................................................................................................... 106

8. Option -160: RTCA / DO-160D ................................................................................................... 108

8.1 General ......................................................................................................................................... 108

8.2 Initial Setup ................................................................................................................................... 108

8.3 Tests Performed ............................................................................................................................ 108

8.4 Front Panel Operation -160 ........................................................................................................... 109

8.5 Normal State tests......................................................................................................................... 110

8.6 EMERGENCY TEST ..................................................................................................................... 118

8.7 ABNORMAL TEST ........................................................................................................................ 120

9. Option -704: MIL-STD 704 Rev D through F (MIL704 Mode) ..................................................... 123

9.1 General ......................................................................................................................................... 123

9.2 Initial Setup ................................................................................................................................... 123

9.3 Test Revision ................................................................................................................................ 123

9.4 Tests Performed ............................................................................................................................ 124

9.5 Front Panel Operation MIL704 ...................................................................................................... 125

9.6 Steady State Tests ........................................................................................................................ 126

9.7 EMERGENCY TEST ..................................................................................................................... 129

9.8 ABNORMAL TEST ........................................................................................................................ 130

10. Option –704F: MIL-STD 704 Rev A through F (MS704 mode) .................................................. 132

10.1 General ......................................................................................................................................... 132

10.2 Initial Setup ................................................................................................................................... 132

10.3 Test Revision ................................................................................................................................ 132

10.4 Test Standard Reference .............................................................................................................. 133

10.5 Available Tests .............................................................................................................................. 133

10.6 Front Panel Operation MS704 ...................................................................................................... 135

10.7 Test Steps and Execution Times Summary .................................................................................. 138

10.8 MS704 Operation Using the LxGui Software ................................................................................ 185

11. Error Messages .......................................................................................................................... 193

12. Index ........................................................................................................................................... 199

User Manual Lx / Ls Series

List of Figures

Figure 2-1: 3000Lx Voltage / Current Rating Chart for 150V AC Range in 3 phase mode. ................................ 16

Figure 2-2: 4500Lx Voltage / Current Rating Chart for 150V AC Range in 3 phase mode. ................................ 17

Figure 2-3: 6000Lx Voltage / Current Rating Chart for 150V AC Range in 3 phase mode. ................................ 17

Figure 2-4: 3000Ls Voltage / Current Rating Chart for 135V AC Range in 3 phase mode. ................................ 18

Figure 2-5: 4500Ls Voltage / Current Rating Chart for 135V AC Range in 3 phase mode. ................................ 18

Figure 2-6: 6000Ls Voltage / Current Rating Chart for 135V AC Range in 3 phase mode. ................................ 19

Figure 3-1: Rear Panel Connector Locations – Lx Series ................................................................................... 36

Figure 3-2: Rear Panel Connector Locations – Ls Series ................................................................................... 37

Figure 3-3: 9000Lx/2 and 9000Ls/2 Output Wiring ............................................................................................. 41

Figure 3-4: 9000Lx/2, 9000Ls/2, 12000Lx/2 or 12000Ls/2 Wiring diagram - 3 Phase mode .............................. 42

Figure 3-5: 13500Lx/2, 13500Ls/3, 18000Ls/3 or 18000Ls/3 Wiring diagram - 3 Phase mode .......................... 43

Figure 3-6: Clock and Lock Connections ............................................................................................................ 53

Figure 4-1: Shuttle Knob ..................................................................................................................................... 56

Figure 4-2: Menu Keys ........................................................................................................................................ 57

Figure 4-3: Measurement Screen ........................................................................................................................ 59

Figure 4-4: PROGRAM Menu .............................................................................................................................. 63

Figure 4-5: CONTROL Menus ............................................................................................................................. 64

Figure 4-6: MEASUREMENT Screen .................................................................................................................. 68

Figure 4-7: Selecting a Waveform ....................................................................................................................... 82

Figure 4-8: Selecting Waveforms for Single Phase or All Phases ...................................................................... 82

Figure 4-9: Waveform Crest Factor Affects Max. rms Voltage ............................................................................ 83

Figure 4-10: Pulse Transients ............................................................................................................................. 87

Figure 4-11: List Transients ................................................................................................................................. 87

Figure 4-12: Sample Transient Output Sequence ............................................................................................... 89

Figure 4-13: Switching Waveforms in a Transient List ........................................................................................ 90

Figure 4-14: TRANSIENT Menu .......................................................................................................................... 90

Figure 6-1: Location of Gain pot adjustments ..................................................................................................... 99

Figure 8-1: Application Menu ............................................................................................................................ 109

Figure 8-2: DO160 Main Menus ........................................................................................................................ 109

Figure 8-3: Normal state screens ...................................................................................................................... 110

Figure 8-4: Voltage Modulation - Frequency characteristics ............................................................................. 113

Figure 8-5: Frequency Modulation..................................................................................................................... 114

Figure 8-6: Power Interrupt................................................................................................................................ 115

Figure 8-7: Power Interrupt for Group2/A(NF) and Group3/A(WF) ................................................................... 116

Figure 8-8: Emergency Screens ........................................................................................................................ 118

Figure 8-9: Abnormal Screen ............................................................................................................................ 120

Figure 9-1: Applications Menu ........................................................................................................................... 125

Figure 9-2: MIL704 Menu .................................................................................................................................. 125

Figure 9-3: Steady State Menu .......................................................................................................................... 126

Figure 9-4: Emergency Menu ............................................................................................................................ 129

Figure 9-5: Abnormal Screens .......................................................................................................................... 130

Figure 10-1: Applications Menu ......................................................................................................................... 135

Figure 10-2: MIL704 Run/Status ....................................................................................................................... 135

Figure 10-3: Mil704 Run/Status ......................................................................................................................... 135

Figure 10-4: Revision/Group Menu ................................................................................................................... 136

Figure 10-5: Test selection Menu ...................................................................................................................... 136

Figure 10-6: Section and Test Condition ........................................................................................................... 137

Figure 10-7:Steady State frequency .................................................................................................................. 137

Figure 10-8: Required SAC-106 Test Setup. ..................................................................................................... 140

Figure 10-9: Required TAC-106 Test Setup. ................................ ..................................................................... 153

Figure 10-10: Required SVF-106 Test Setup. ................................................................................................... 166

Figure 10-11: Required TVF-106 Test Setup. ................................................................................................... 174

Figure 10-12: Required SXF-106 Test Setup. ................................................................................................... 181

Figure 10-13: LxGui MS704 Option Screen ...................................................................................................... 186

Figure 10-14: LxGui MS704 Option EUT Performance Test Screen - Measurements ...................................... 187

Figure 10-15: LxGui MS704 Option EUT Performance Test Screen - Waveforms ........................................... 189

User Manual Lx / Ls Series

List of Tables

Table 3-1: Output Terminal connections. ............................................................................................................ 40

Table 3-2: Rear Panel Connectors ..................................................................................................................... 45

Table 3-3: AC Input Terminal Block Connection Description .............................................................................. 45

Table 3-4: SMA Connectors – Lx Series ............................................................................................................. 46

Table 3-5: SMA Connectors – Ls Series ............................................................................................................. 46

Table 3-6: BNC Connectors ................................................................................................................................ 47

Table 3-7: External Sense Connector ................................................................................................................. 47

Table 3-8: RS232C Connector ............................................................................................................................ 47

Table 3-9: Full Load Resistance – Lx Series ...................................................................................................... 50

Table 3-10: Full Load Resistance – Ls Series .................................................................................................... 50

Table 4-1: Menu Tree .......................................................................................................................................... 63

Table 4-2: Sample Transient List ........................................................................................................................ 89

Table 4-3: Factory Default Power on Settings .................................................................................................... 91

Table 4-4: Factory Default Power on Settings .................................................................................................... 92

Table 6-1: Calibration Load Values- Single-chassis configurations .................................................................... 96

Table 6-2: Calibration Load Values- Multi-chassis configurations ...................................................................... 96

Table 6-3: Output Calibration Coefficients - Factory Defaults. ............................................................................ 97

Table 6-4: Output Calibration Coefficients - Factory Defaults. .......................................................................... 100

Table 6-5: Amplifier balance adjustments ......................................................................................................... 101

Table 7-1: Basic Symptoms .............................................................................................................................. 102

Table 7-2: Replaceable Parts and Assemblies ................................................................................................. 107

Table 8-1: Normal Voltage and Frequency minimum ....................................................................................... 111

Table 8-2: Normal Voltage and Frequency Maximum ....................................................................................... 111

Table 8-3: Normal Voltage Unbalance .............................................................................................................. 112

Table 8-4: Airbus mode voltage modulation. .................................................................................................... 112

Table 8-5: Normal VoltageSurge Sequence ..................................................................................................... 116

Table 8-6: Normal Frequency Transient Sequence .......................................................................................... 117

Table 8-7: Normal Frequency Variation Sequence ........................................................................................... 117

Table 8-8: Emergency Voltage and Frequency Minimum ................................................................................. 118

Table 8-9: Emergency Voltage and Frequency Maximum ................................................................................ 118

Table 8-10: Emergency Voltage Unbalance ..................................................................................................... 119

Table 8-11: Abnormal Voltage Minimum ........................................................................................................... 120

Table 8-12: Abnormal Voltage Maximum .......................................................................................................... 120

Table 8-13: Abnormal Voltage Unbalance ........................................................................................................ 121

Table 8-14: Abnormal Frequency Transient...................................................................................................... 122

Table 9-1: Steady state voltage ........................................................................................................................ 126

Table 9-2: Steady state frequency .................................................................................................................... 127

Table 9-3: Frequency Modulation ..................................................................................................................... 127

Table 9-4: Abnormal Over Frequency ............................................................................................................... 131

Table 9-5: Abnormal Under Frequency ............................................................................................................. 131

Table 10-1: DO160 Test Groups ....................................................................................................................... 133

Table 10-2: Test Selections .............................................................................................................................. 136

Table 10-3: Steady state frequency .................................................................................................................. 137

Table 11-1: Error Messages.............................................................................................................................. 198

User Manual Lx / Ls Series

1. Introduction

This instruction manual contains information on the installation, operation, calibration and maintenance of the Lx Series and Ls Series AC power sources.

1.1 General Description

The Lx Series of AC Power Source is a family of high efficiency, rack mountable, AC Power Source/Analyzer combinations that provide a precise output with low distortion and advanced measurements. Standard output voltage ranges are 150 Vac and 300 Vac RMS. The Lx Series can operate in either single or three-phase mode.

The Ls Series of AC Power Source is a family of high efficiency, rack mountable, AC Power Sources that provide a precise output with low distortion. Standard output voltage ranges are 135 Vac and 270 Vac RMS. The Ls Series is available in either single (-1) or three-phase mode (3). A –MODE option is available on –3 Ls models.

For power levels above 4500 VA, two or more Lx or Ls series units can be combined using the system interface in a parallel mode of operation. These multi chassis systems consist of one master unit with controller and one or two auxiliary units without controllers. Only the master unit has a front panel keyboard and display.

Read the installation instructions carefully before attempting to install and operate the Lx / Ls Series power systems.

1.2 Lx Series and Ls Series Differences

The Lx Series and Ls Series of AC power sources are both based on the same AC power source hardware platform and share many common components. The differences are primarily in configuration and options. This manual covers both model series. Some menus and screen shown in this manual may not apply to Ls Series AC sources without the –ADV option and / or – MODE option.

1.2.1 Firmware differences

The Lx Series is fully featured and supports all commands listed in the programming manual. The Ls Series provides most basic functions in its standard configurations. More advanced

features can be added by specifying the –ADV (advanced) option. If the –ADV option is installed, all commands listed in this programming manual are supported. If not, commands related to arbitrary waveforms and harmonic analysis measurements are not supported and will generate a “-113 Syntax Error” message.

1.2.2 Hardware differences

In addition to the firmware differences described, the following hardware differences exist between the standard Lx Ac source and the Ls AC source.

Lx has a 150V / 300 V rms output range pair. Optional ranges of 135/270 (-HV option)

and 200/400 (-EHV option) are available at time of order.

Ls has a 135 V / 270 V rms output range pair. Optional ranges of 156/312 (-HV option)

and 200/400 (-EHV option) are available at time of order.

The Lx rear panel connector labeling is compliant with the California Instruments iL

Series which it replaces and the HP/Agilent model 6834B.

User Manual Lx / Ls Series

The Ls rear panel connector labeling is compliant with the California Instruments L

Series. The Lx Series comes standard with both GPIB and RS232C interfaces. The Ls Series comes standard with an RS232C only, An optional GPIB interface (-GPIB

option) is available.

Note: Both interfaces use the SCPI command syntax as described in the programming manual.

The Lx Series provides both three phase and single phase output modes which can be

selected from the front panel or over the bus. The Ls Series provides either three phase (-3 models) or single phase (-1 models).

Three phase Ls Series sources may optionally be equipped with the –MODE option

which provides the same phase mode switching as the Lx Series.

1.3 Manual organization and format

All user documentation for California Instruments power sources is provided on CDROM in electronic format. (Adobe Portable Document Format) The required Adobe PDF viewer is supplied on the same CDROM. This manual may be printed for personal use if a hardcopy is desired. To request a hardcopy from California Instruments, contact customer service at

support@calinst.com. There will be an additional charge for printed manuals.

This manual contains sections on installation, normal use, maintenance and calibration. The Lx Series is equipped with both GPIB and RS232C interfaces. The Ls Series is equipped with a RS232C interface. An optional GPIB interface can be specified at the time of order. Refer to the Lx / Ls Series Programming manual for information on using the remote control interface and command syntax. The programming manual (P/N 7004-961) is provided on the same CDROM as this user manual.

California Instruments may make updated versions of this manual available from time to time in electronic format through it’s website. To obtain an updated manual revision if available, check the California Instruments Manual download page at www.calinst.com. You need to register as a customer to obtain free access to manual and software downloads.

User Manual Lx / Ls Series

Parameter

Specification

Line Voltage: (3 phase, 3 wire + ground (PE))

3000Lx, 4500Lx, 9000Lx/2, 13500Lx/3: Std: 208 - 230 VLL ± 10%

-400: 400 VLL 10% 6000Lx, 12000Lx/2, 18000Lx/3:

Std: 208 - 230 VLL + 10%

Note: Each Lx/ Ls chassis requires its own AC service.

Note: 3000Lx/Ls may be operated from 208-230 V L-N single phase AC input between L2 and L3 on TB3 for3000Lx or ØB- ØC on TB3 for 3000Ls.

Line VA: (total)

3000Lx / Ls 5900 VA / 4100 W 4500Lx / Ls 8900 VA / 5900 W(x2 for 9000Lx/2, x3 for 13500Lx/3) 6000Lx / Ls 11900 VA / 7900 W (x2 for 12000Lx/2, x3 for 18000Lx/3

Line Current: (per phase)

3000Lx / Ls Std: 19 Arms @ 187 VLL, 3 phase AC input.

[32 Arms @ 187 VLN single phase AC input. Connect between TB3 L2-L3 on 3000Lx or TB3 ØB- ØC on

3000Ls]

-400: 10 Arms @ 360 VLL, 3 phase AC input.

4500Lx / Ls Std: 31 Arms @ 187 VLL

-400: 16 Arms @ 360 VLL 6000Lx / Ls Std: 38 Arms @ 208 VLL Currents shown are for single chassis models. For multi-chassis

configurations, currents are per chassis.

2. Specifications

Specifications shown are valid over an ambient temperature range of 25 5 C and apply after a 30 minute warm-up time. Unless otherwise noted, all specifications are per phase for sine wave output into a resistive load. For three phase configurations or mode of operation, all specifications are for Line to Neutral (L-N) and phase angle specifications are valid under balanced load conditions only.

Specifications for Ls models are identical to those for the Lx except where noted.

2.1 Electrical

2.1.1 Input

Note that operation below 208V L-L AC input is available with the following derating considerations:

1) If operating at less than a 5000 VA output power there will be no affect on the output.

2) If operating in 3-phase mode, with a full-scale output voltage and a frequency less than three times the line frequency, the voltage distortion may exceed specification between 5500 and 6000 VA output.

3) If operating in 1-phase mode above 5000 VA, above 85% of full-scale output voltage and an output frequency less than three times the line frequency, the voltage distortion may exceed specification and the output may fault with a crest factor load more than 2. In most applications, these conditions are not likely to exits. At AC input voltages of 208 V or higher, the 6000Lx/Ls meets specifications under all conditions.

User Manual Lx / Ls Series

Parameter

Specification

Line Frequency:

47-440 Hz

Efficiency:

75 % (typical) depending on line and load

Power Factor:

0.65 (typical)

Inrush Current:

50 Apk @ 253VLL per chassis 83 Apk @ 400 V

per chassis

Note: Each Lx chassis requires its own AC service.

Hold-Up Time:

> 10 ms

Isolation Voltage:

300 VAC RMS input to output 1350 VAC input to chassis

User Manual Lx / Ls Series

Output Parameter

Specification

Modes

Voltage:

Ranges (L-N):

Lx Series

Ls Series

Low range

0 - 150 Vrms

0 - 135 Vrms

High range

0 - 300 Vrms

0 - 270 Vrms

Resolution:

0.1 V

Programming Accuracy:

± (0.05% + 0.25 V) from 5V to FS.

Distortion THD1: Standard:

< 1 % [45 - 1000 Hz] < 1 % + 1%/kHz [> 1000 Hz] (harmonics and noise to 300 kHz)

With –HF and –LKM option: < 2 % [45 - 1000 Hz] < 2 % + 1%/kHz [> 1000 Hz] (harmonics and noise to 300 kHz)

Load Regulation: ALC mode ON

0.1 % FS

External Sense

Up to 10Vrms can be dropped across each load lead Fout < 400 Hz.

Up 2.5 Vrms can be dropped across each load lead Fout > 400 Hz

Internal or External sense selectable.

Line Regulation:

0.02% for 10% input line change

DC Offset Voltage:

0.0 V

Output Noise: (20 kHz to 1 MHz)

< 100 mV

RMS typical

Output Coupling

Transformer coupled

Output Impedance (Z)

Z = Vrange * 0.001 / I_load

Power – Lx Series (total power for all phases, either range, at full scale voltage)

35° C Ambient

50° C Ambient

Model

3000Lx

4500Lx

6000Lx

3000Lx

4500Lx

6000Lx

Single Phase Mode

3 KVA

4.5 KVA

5.76 KVA

3 KVA

4 KVA

5 KVA

Three Phase Mode (per

phase)

1 KVA

1.5 KVA

1.9 KVA

1 KVA

1.35 KVA

1.7 KVA

Model

9000Lx/2

12000Lx/2

9000Lx/2

12000Lx/2

Single Phase Mode

9 KVA

11.5 KVA

8 KVA

10 KVA

Three Phase Mode (per

phase)

3 KVA

3.8 KVA

2.7 KVA

3.3 KVA

Model

13500Lx/3

18000Lx/3

13500Lx/3

18000Lx/3

2.1.2 Output

The distortion specification for the Lx Series applies at full-scale voltage, full resistive load conditions.

User Manual Lx / Ls Series

Output Parameter

Specification

Single Phase Mode

13.5 KVA

5.76 KVA

12 KVA

15 KVA

Three Phase Mode (per

phase)

4.5 KVA

17.3 KVA

4 KVA

5 KVA

Power – Ls Series (total power for all phases, either range, at full scale voltage)

35° C Ambient

50° C Ambient

Model

3000Ls

4500Ls

6000Ls

3000Ls

4500Ls

6000Ls

Single Phase Mode

3 KVA

4.5 KVA

6 KVA

3 KVA

4 KVA

5 KVA

Three Phase Mode (per

phase)

1 KVA

1.5 KVA

2 KVA

1 KVA

1.35 KVA

1.7 KVA

Model

9000Ls/2

12000Ls/2

9000Ls/2

12000Ls/2

Single Phase Mode

9 KVA

12 KVA

8 KVA

10 KVA

Three Phase Mode (per

phase)

3 KVA

4 KVA

2.7 KVA

3.3 KVA

Model

13500Ls/3

18000Ls/3

13500Ls/3

18000Ls/3

Single Phase Mode

13.5 KVA

6 KVA

12 KVA

15 KVA

Three Phase Mode (per

phase)

4.5 KVA

18 KVA

4 KVA

5 KVA

Maximum Current at Full Power – Lx Series

Note: Current, maximum amps per phase available at on low voltage range. 3000Lx and 4500Lx

operate in constant power mode up to currents shown at reduced voltage. See Figure 2-1. For 9000Lx/2 and 12000Lx/2, currents are 2 x 4500Lx and 6000Lx. For 13500Lx/3 and 18000Lx/3, currents are 3 x 4500Lx and 6000Lx

Model

3000Lx

4500Lx

6000Lx

Single Phase Mode: Max. RMS, low Vrange

38.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

12.8 A

Note: Current derates linearly from 50% of voltage range to 20% of specified current at 10% of

voltage range. Current in High voltage range is reduced by a factor of 2.

Note: For 9000Lx/2 and 12000Lx/2, currents are 2 x 4500Lx and 6000Lx.

For 13500Lx/3 and 18000Lx/3, currents are 3 x 4500Lx and 6000Lx

Maximum Current at Full Power – Ls Series

Note: Current, maximum amps per phase available at on low voltage range. 3000Ls and 4500Ls

operate in constant power mode up to currents shown at reduced voltage. See Figure 2-1. For 9000Ls/2 and 12000Ls/2, currents are 2 x 4500Ls and 6000Ls. For 13500Ls/3 and 18000Ls/3, currents are 3 x 4500Ls and 6000Ls

Model

3000Ls

4500Ls

6000Ls

Single Phase Mode: Max. RMS, low Vrange

44.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

14.8 A

Note: Current derates linearly from 50% of voltage range to 20% of specified current at 10% of

User Manual Lx / Ls Series

Output Parameter

Specification

voltage range. Current in High voltage range is reduced by a factor of 2.

Note: For 9000Ls/2 and 12000Ls/2, currents are 2 x 4500Ls and 6000Ls.

For 13500Ls/3 and 18000Ls/3, currents are 3 x 4500Ls and 6000Ls

Maximum Current at Full Scale Voltage – Lx Series

Model

3000Lx

4500Lx

6000Lx

Single Phase Mode: Max. RMS, low Vrange

20 A

30 A

38.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

6.67 A

10 A

12.8 A

Current Limit mode

Programmable, CC or CV mode

Maximum Current at Full Scale Voltage – Ls Series

Model

3000Ls

4500Ls

6000Ls

Single Phase Mode: Max. RMS, low Vrange

22.2 A

33.3 A

44.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

7.4 A

11.1 A

14.8 A

Current Limit mode

Programmable, CC or CV mode

Repetitive Peak Current

Model

3000Lx / Ls

4500Lx / Ls

6000Lx / Ls

Max. Peak Current:

6 x RMS current at FS

4 x RMS current at FS

3 x RMS current at FS

Note: For 9000Lx / Ls /2 and 12000Lx / Ls /2, currents are 2 x 4500Lx/Ls and 6000Lx/Ls.

For 13500Lx / Ls/3 and 18000Lx / Ls /3, currents are 3 x 4500Lx/Ls and 6000Lx/Ls

Frequency

Range:

45 Hz - 1000 Hz

Resolution1:

0.01 Hz [< 81.91 Hz]

0.1 Hz [> 82.0 to 819.1 Hz] 1 Hz2 [> 819 Hz]

Accuracy:

± 0.025 %

Temp. Coefficient

± 5 ppm of value / °C

Stability:

± 15 ppm of value

Phase (3 phase mode)

Range:

Phase B/C relative to phase A

0.0 to 360.0°

Resolution:

0.1° < 819.1 Hz

0.5° > 819.1 Hz

Accuracy:

< 1° [45 Hz - 1000 Hz] < 1° + 1°/kHz [> 1000 Hz]

Programming resolution reduced if –LKM/-LKS option is installed. See paragraphs 2.6.5 and 2.7.5.

Programming resolution of 0.5 Hz above 819.1 Hz may be used over the remote control bus with ± 0.5 Hz

accuracy.

User Manual Lx / Ls Series

Current

(RMS)

Voltage (RMS)

7578

100%

60%

80%

40%

20%

150

150 V Range

Full

Power

12.8 A

Note: All output specifications apply below the Current / Voltage rating line shown in the

V/I rating charts of section 2.1.2.1 for Lx Series and section 2.1.2.2 for Ls Series.

Data is shown for 3-phase mode, low voltage range. For 1-phase mode, multiply

current by 3. For high voltage range, divide current by 2 and multiply voltage by 2.

2.1.2.1 Voltage versus Current Rating Charts - Lx Series

Figure 2-1: 3000Lx Voltage / Current Rating Chart for 150V AC Range in 3 phase mode.

User Manual Lx / Ls Series

Current

(RMS)

Voltage (RMS)

75 117

100%

60%

80%

40%

20%

150

150 V Range

Full

Power

12.8 A

Current

(RMS)

Voltage (RMS)

75 117

100%

60%

80%

40%

20%

150

150 V Range

12.8 A

Figure 2-2: 4500Lx Voltage / Current Rating Chart for 150V AC Range in 3 phase mode.

Figure 2-3: 6000Lx Voltage / Current Rating Chart for 150V AC Range in 3 phase mode.

User Manual Lx / Ls Series

Current

(RMS)

Voltage (RMS)

67.5

100%

60%

80%

40%

20%

135

135 V Range

Full

Power

14.8 A

13.5

Current

(RMS)

Voltage (RMS)

67.5

100%

60%

80%

40%

20%

135

135 V Range

Full

Power

14.8 A

13.5 100

2.1.2.2 Voltage versus Current Rating Charts - Ls Series

Figure 2-4: 3000Ls Voltage / Current Rating Chart for 135V AC Range in 3 phase mode.

Figure 2-5: 4500Ls Voltage / Current Rating Chart for 135V AC Range in 3 phase mode.

User Manual Lx / Ls Series

Current

(RMS)

Voltage (RMS)

67.5

100%

60%

80%

40%

20%

135

135 V Range

14.8 A

13.5

Figure 2-6: 6000Ls Voltage / Current Rating Chart for 135V AC Range in 3 phase mode.

User Manual Lx / Ls Series

Parameter

Range

Accuracy ( )

Resolution

1 Phase Mode

3 Phase Mode

Frequency1

45.00-1000.0 Hz

0.1% ± 1 digit

0.01 Hz to 81.91 Hz

0.1 Hz to 819.1 Hz 1 Hz > 819.1 Hz

Phase

45.00 - 100.0 Hz

100.0 - 1000 Hz

0.5° 2°

0. 1° RMS Voltage

0 - 400 Volts

0.05% + 0.25V

0.01 Volt

RMS Current

0 - 50 Amps

0.1% + 0.15A

0.1% + 0.05A

0.001 Amp

Peak Current

0 - 150 Amps

0.2% + 0. 5A

0.1% + 0.15A

0.001 Amp

Crest Factor

1.00 – 10.00

1.5 %

0.01

VA Power

0 - 6 KVA

0.15% + 9 VA

0.15% + 3 VA

1 VA

Real Power

0 - 6 KW

0.15% + 9 W

0.15% + 3 W

1 W

Power Factor

0.00 - 1.00

0.03

0.01

Note: Accuracy specifications are valid above 100 counts. For multi-chassis configurations, Current and Power range and accuracy specifications are times the number of chassis.

Note: Frequency measurement specification valid for output > 20 Vrms. Note: Crest Factor accuracy applies for Irms > 50% of max. Note: Power Factor accuracy applies for PF > 0.5 and VA > 50% of max.

Parameter

Range

Accuracy ( )

Resolution

Frequency fundamental

45.00 - 81.91 Hz

82.0 - 819.1 Hz > 819.1 Hz

0.1% ± 1 digit

0.01 Hz

0.1 Hz 1 Hz

Frequency harmonics

45.00 Hz – 16 kHz

0.1% + 2 digits

0.1 Hz

Voltage

Fundamental

0 - 400 Volts

0.05% + 0.25V

0.01V

Harmonic 2 - 50

0.1% + 0.1%/kHz + 0.25

0.01V

Current

Fundamental

0 - 20 Amps

0.1% + 0.05A

0.01A

Harmonic 2 - 50

0.1% + 0.1%/kHz + 0.05A

0.01A

Note: Current range and accuracy specifications are times three in single-phase mode. For multichassis configurations, current accuracy specifications are times the number of chassis.

2.1.3 AC Measurements

Measurement specifications apply to single chassis Lx / Ls Series AC source in single or threephase mode. See notes for other models and configurations.

2.1.4 Harmonic Measurements

Harmonic measurement specifications apply to Lx Series or Ls Series –3 with –ADV option AC sources in three-phase mode. See notes for single-phase mode or Ls –1 with –ADV option.

Frequency measurement specifications valid with output voltage of 30Vrms or higher. If output relay is open,

frequency measurement will return 0.0 Hz.

User Manual Lx / Ls Series

Parameter

Specification

Trigger Input:

External trigger source input. Requires TTL level input signal. Triggers on negative edge. Response time 80 - 100 s.

Non volatile memory storage:

16 complete instrument setups and transient lists, 100 events per list. 50 User defined waveforms.

Waveforms

Lx Series: Sine, square, clipped, user defined Ls Series standard: Sine, square, clipped Ls Series w –ADV option: Sine, square, clipped, user defined

Transients

Voltage: drop, step, sag, surge, sweep Frequency: step, sag, surge, sweep Voltage and Frequency: step, sweep

IEEE-488 Interface: (Requires –GPIB option on Ls Series)

AH1, DC1, DT1, L3, RL2, SH1, SR1, T6 IEEE 488.2 and SCPI Response time is 10 ms (typical)

RS232C Interface:

Baud rates, 9600, 19200, 38400, 57600 and 115200 Data bits: 8 Start bits: 1 Stop bits: 1 Parity: None SCPI Response time is 10 ms (typical @ 115200 baud)

Current Limit Modes:

Two selectable modes of operation:

1. Constant current mode (voltage folds back with automatic recovery)

2. Constant voltage mode with trip-off (Relays open).

Parameter

Specification

Input Over current:

Input Circuit breaker. This breaker protects the equipment only and is not a branch protection device. AC input connection should be make using a suitable branch protection device per local electrical code.

Input Over voltage Transients:

Surge protection to withstand EN50082-1 (IEC 801-4, 5) levels.

Output Over current:

Adjustable level constant current mode with programmable set point.

Output Short Circuit:

Peak and RMS current limit.

Over temperature:

Automatic shutdown.

2.1.5 System Specification

2.1.6 Unit Protection

User Manual Lx / Ls Series

Parameter

Specification

Dimensions:

Height:: 10.5 inches (26.7 cm) 3000Lx, 4500Lx. 6000Lx 21 inches (53.4 cm) 9000Lx/2, 12000Lx/2

31.5 inches (80.1 cm) 13500Lx, 18000Lx/3 Depth: 23 inches (58.4 cm) Width: 19 inches (48.3 cm)

All dimensions are per chassis. For /2 or /3 model configurations, multiply height by 2 or 3 for total height. Width includes integrated front panel rack mount ears.

Equipment Rack depth requirement

25 inches (63.5 cm)

Unit Weight: Per chassis

Net: 193 lbs / 87.7 Kg approximately Shipping: 280 lbs / 127.3 Kg approximately

All weights are per chassis. For /2 or /3 model configurations, each chassis is packaged individually.

Material:

Steel chassis with aluminum top cover

Finish:

Anodized external surfaces. Front panel color medium gray.

Cooling:

Fan cooled with air intake on the sides and exhaust to the rear. Variable speed fan control.

Acoustic Noise (Supplemental specification)

Measured at 1 m distance: Fan speed: Low power mode Full power mode Front of unit: 47 dBA 50 dBA Rear of unit: 62 dBA 67 dBA

Internal Construction:

Modular sub assemblies.

Rear Panel Connections:

(See section 3 for description of connections)

AC input wiring AC output wiring External sense terminal block (Remote voltage sense) System interface (2x) GPIB and RS232C Trigger In and Out SMA's (Master Lx chassis only)

Parameter

Specification

Operating Temp:

0° to +35 C, full power, 0° to +50 C, reduced power +32° to +95° F, full power, +32° to +122 F, reduced power.

Storage Temp:

-40° to +85 C.

-40° to +185° F.

Altitude:

< 2000 meters < 6000 feet

2.2 Mechanical

2.3 Environmental

User Manual Lx / Ls Series

Parameter

Specification

Relative Humidity:

0-95 % RAH, non-condensing maximum for temperatures up to 31 C decreasing linearly to 50% at 40 C.

Indoor Use Only

Vibration:

Designed to meet NSTA project 1A transportation levels.

Shock:

Designed to meet NSTA project 1A transportation levels.

Controls:

Shuttle knobs:

Voltage and Frequency shuttle knobs may be used to adjust voltage and frequency for selected phase or all three phases while in the SET menu. In all other menu's, the shuttles may be used to change parameter values and settings.

Up/down arrow keys:

A set of up and down arrow keys is used to move the cursor position in all menus. This allows quick selection of the desired function or parameter.

Function keys:

Set key will show output voltage and frequency setting. Meas key displays the measurement screens. Measure key will display

measurement values for selected phase or phase A if all three phases are selected.

Menu key selects main menu. Enter key is used to confirm selections. Back key is used to back up to previous screen. Output on/off key for output relay control. Phase key toggles between phase A, B, C or all phases selection.

Displays:

LCD graphics display:

Large high contrast backlit LCD display. An adjustable viewing angle makes it easy to read from all practical locations.

Status indicators:

Large and bright status indicators inform the user of important power source conditions.

The Remote lamp informs the user that the unit is under remote control. The Overload lamp indicates that excessive current is being drawn at

the output. The Over temperature lamp illuminates when internal heat sink

temperatures are too high. The Hi Range indicator is lit any time the unit is switched to the high

voltage range. The Output On/Off indicator is on when the power source output relays

are closed. The Phase A, B and C indicators are lit when the relevant phase is

selected with the Phase key.

Controller Features

2.4 Front Panel Controls

2.5 Special Features

User Manual Lx / Ls Series

Mode:

Switches between 1 and 3 phase outputs.

Parallel Operation:

9000Lx/2 and 13500Lx/2 systems use two or three 4500Lx chassis in parallel operation. The two or three chassis must be connected using the system interface cable supplied with the system. 12000Lx/3 and 18000Lx/3 systems use two or three 6000Lx chassis in parallel operation. The two or three chassis must be connected using the system interface cable supplied with the system

Controller:

Programmable controller front panel assembly.

Output Relay:

Standard output relay feature to isolate power source from the load.

Output On/Off:

The output relay can be used to quickly disconnect the load. A yellow status indicator displays the status of the output relay.

External Trigger Output or Function Strobe

An external TTL output is available which may be used to trigger other equipment. The TTL output can be controlled by the transient programming system. This requires the trigger mode to be set to EXT (factory default). This can only be done over the bus using the OUTP:TTLT:MODE TRIG command. This mode is compatible with the Agilent HP6834B.

It can also be configured to generate an output pulse any time the voltage, frequency, current limit or phase programming is updated. This requires the trigger mode to be set to FSTR. This can only be done over the bus using the OUTP:TTLT:MODE FSTR command. This mode is compatible with the CI L Series.

The Trigger Output (Trig Out1) / function strobe is an active low1 TTL signal with a duration of no less than 400 usec.

Clock and Lock Mode

Enables two or more independent Ls/Lx power systems to be phase synchronized to each other. One system (-LKM) acts as the master, the other(s) (-LKS) as auxiliaries. The –LKS units are synced to the –LKM unit. Refer to section 3.9 for details on Clock and Lock mode.

Trigger Input

A TTL input signal may be used as an external trigger source for output changes programmed on the AC power source transient system. This requires the trigger source to be set to EXT. This can only be done over the bus.

Output Options

-AX

Auxiliary outputs, 5 VAC and 26 VAC, 400 Hz. (Output D and E)

- HV

135 / 270 V range output

- EHV

200 / 400 V range output

-HF

High frequency option. Increases output frequency to 5000 Hz (single chassis configurations) or 2000 Hz (multi-chassis models).

-LF

Low frequency option. Limits maximum output frequency to 500 Hz.

Firmware Options

- 704

Mil Std 704 test firmware. Includes AC tests for Revisions D and E

- 704F

Mil Std 704 test firmware. Includes AC tests for Revisions A through F

2.6 Available Options – Lx Series

1 Note: Early production models may have an active high Trig Out1 polarity.

User Manual Lx / Ls Series

- 160

RTCA/DO-160D test firmware. Includes RCTA-DO160D, section 16, Change #2 and EURO/CAE-14D AC tests only.

Misc. Options

-L22

Locking Knobs. Shaft lock screws replace knobs to prevent turning of Voltage and Frequency shuttles.

-LKM

Clock and Lock Master. Enables synchronizing outputs of two Lx AC sources, one acting as master. This mode supports a frequency range of 45 to 819 Hz on standard Lx/Ls models. See section 3.9.

-LKS

Clock and Lock Auxiliary. See -LKM for details. (see Notes) See section

3.9.

-LNS

Line Sync (see Notes)

-EXS

External Sync (see Notes)

-RMS

Set of 2 Rack mount slides. (Left and Right) Recommended to mount Lx Chassis in 19 inch instrument cabinet.

Notes:

External Trigger input is standard. Line sync and External sync are mutually exclusive. External Trigger input and External sync are mutually exclusive. Units with -LKS (auxiliary) cannot have Line Sync or External Sync.

Voltage:

Ranges (L-N):

Low range

0 - 135 Vrms

High range

0 - 270 Vrms

Maximum Current at Full Power

Note: Current, maximum amps per phase available at on low voltage range. 3000Lx and 4500Lx

Model

3000Lx-HV

4500Lx-HV

6000Lx-HV

Single Phase Mode: Max. RMS, low Vrange

44.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

14.8 A

Note: Current derates linearly from 50% of voltage range to 20% of specified current at 10% of

voltage range. Current in High voltage range is reduced by a factor of 2.

Note: For 9000Lx/2-HV and 12000Lx/2-HV, currents are 2 x 4500Lx-HV and 6000Lx-HV.

For 13500Lx/3-HV and 18000Lx/3-HV, currents are 3 x 4500Lx-HV and 6000Lx-HV

Maximum Current at Full Scale Voltage

2.6.1 -HV Option Lx Series - Supplemental Specifications

Specifications for Lx units with -HV voltage range option installed are same as standard Lx unit except where noted below.

User Manual Lx / Ls Series

Model

3000Lx-HV

4500Lx-HV

6000Lx-HV

Single Phase Mode: Max. RMS, low Vrange

22.2 A

33.3 A

44.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

7.4 A

11.1 A

14.8 A

Voltage:

Ranges (L-N):

Low range

0 - 200 Vrms

High range

0 - 400 Vrms

Maximum Current at Full Power

Note: Current, maximum amps per phase available at on low voltage range. 3000Lx and 4500Lx

Model

3000Lx-EHV

4500Lx-EHV

6000Lx-EHV

Single Phase Mode: Max. RMS, low Vrange

30.0 A

Three Phase Mode: Max. RMS, low Vrange per phase

10.0 A

Note: Current derates linearly from 50% of voltage range to 20% of specified current at 10% of

voltage range. Current in High voltage range is reduced by a factor of 2.

Note: For 9000Lx/2-EHV and 12000Lx/2-EHV, currents are 2 x 4500Lx-EHV and 6000Lx-EHV.

For 13500Lx/3-EHV and 18000Lx/3-EHV, currents are 3 x 4500Lx-EHV and 6000Lx-EHV

Maximum Current at Full Scale Voltage

Model

3000Lx-EHV

4500Lx-EHV

6000Lx-EHV

Single Phase Mode: Max. RMS, low Vrange

15.0 A

22.5 A

30.0 A

Three Phase Mode: Max. RMS, low Vrange per phase

5.0 A

7.5 A

10.0 A

2.6.2 -EHV Option Lx Series - Supplemental Specifications

Specifications for Lx units with -EHV voltage range option installed are same as standard Lx unit except where noted below.

User Manual Lx / Ls Series

Frequency Range

Model

3000Lx-HF, 4500Lx-HF, 6000Lx-

9000Lx/2-HF, 13500Lx/3-HF

12000Lx/3-HF, 18000Lx/3-HF

Three phase mode

45 Hz - 5000 Hz

45 Hz - 2000 Hz

Single phase mode

45 Hz - 5000 Hz

45 Hz - 2000 Hz

Output

Programming Accuracy:

< 1000 Hz ± (0.05% + 0.25 V) from 5V to FS.

> 1000 Hz ± (0.1% + 0.1% / KHz + 0.3V) from 5V to FS

Output Noise: (20 kHz to 1 MHz)

< 250 mV

RMS typical

Parameter

Range

Accuracy ( )

Resolution

1 Phase Mode

3 Phase Mode

Frequency1

45.00 - 5000.0 Hz

0.1% ± 1 digit

0.01 Hz to 81.91 Hz

0.1 Hz to 819.1 Hz

1 Hz > 819.1 Hz

Phase

45.00 - 100.0 Hz

100.0 - 2000 Hz > 2000 Hz

0.5° 2° 5°

0. 1°

RMS Voltage

0 - 400 Volts < 1000 Hz > 1000 Hz

0.05% + 0.25V

0.1% + 0.1% / KHz + 0.3V

0.01 Volt RMS Current

0 - 50 Amps

0.5% + 0.15A

0.5% + 0.05A

0.001 Amp

Peak Current

0 - 150 Amps

0.5% + 0. 5A

0.5% + 0.15A

0.001 Amp

Crest Factor

1.00 – 10.00

1.5 %

0.01

VA Power

0 - 6 KVA

0.5% + 9 VA

0.5% + 3 VA

1 VA

Real Power

0 - 6 KW

0.5% + 9 W

0.5% + 3 W

1 W

Power Factor

0.00 - 1.00

0.03

0.01

Note: Accuracy specifications are valid above 100 counts. For multi-chassis configurations, Current and Power range and accuracy specifications are times the number of chassis.

Note: Frequency measurement specification valid for output > 20 Vrms. Note: Crest Factor accuracy applies for Irms > 50% of max. Note: Power factor accuracy applies for PF > 0.5 and VA > 50 % of max.

2.6.3 -HF Option Lx Series - Supplemental Specifications

Specification for Lx units with -HF frequency range option installed are same as standard Lx unit except where noted below.

For output frequencies up to 1000 Hz, refer to standard measurement specifications. For output frequencies above 1000 Hz, see table below.

Frequency measurement specifications valid with output voltage of 30Vrms or higher. If output relay is open,

frequency measurement will return 0.0 Hz.

User Manual Lx / Ls Series

Parameter

Supplemental Specification

Phase D Output

Voltage

26.0 Vrms ± 0.52 V

Load Regulation

< 1.5 %

Voltage Distortion

< 1.0 % THD

Max. Current

3.0 Arms

Frequency range:

360 – 440 Hz, locked to programmed frequency. If programmed exceeds 819 Hz, -AX outputs will turn off.

Phase error to phase 1

< 3.0°

Phase E Output

Voltage

5.0 Vrms ± 0.25 V

Load Regulation

< 10 %

Max. Current

1.0 Arms

Frequency range:

360 – 440 Hz, locked to programmed frequency. If programmed exceeds 819 Hz, -AX outputs will turn off.

Phase error to phase 1

< 3.0°

Parameter

Supplemental Specification

Voltage

Voltage Distortion

Standard: standard specifications apply. With –HF option: < 2 % [45 - 1000 Hz] < 2 % + 1%/kHz [> 2000 Hz] (harmonics and noise to 300 kHz)

Frequency

Range

Standard Lx: 45 – 819 Hz With –HF option: 45 - 5000 Hz.

Resolution

Standard Lx: 0.1 Hz With –HF option: 1 Hz

2.6.4 -AX Option Lx Series - Supplemental Specifications

Specifications for -AX auxiliary output voltage option on the Lx units are listed below. This output is available on the Phase D and E terminal strip. There is no external sense connection for the – AX outputs. Sense is internal only. Specifications apply for programmed frequency range of 360 Hz to 440 Hz.

2.6.5 -LKM and -LKS Options Lx Series - Supplemental Specifications

The Clock and Lock option enables two or more independent Ls/Lx power systems to be phase synchronized to each other. One system (-LKM) acts as the master, the other(s) (-LKS) as auxiliaries. The –LKS units are synced to the –LKM unit. Refer to section 3.9 for details on Clock and Lock mode.

The following supplemental specifications apply when the Lx is configured with the Clock and Lock option. (-LKM or –LKS).

User Manual Lx / Ls Series

Parameter

Supplemental Specification

Accuracy

± 0.025%

Phase

Phase Resolution

Standard: standard specifications apply. With –HF option: 0.5°

Phase Accuracy

Standard: standard specifications apply. With –HF option: < 2° + 1°/kHz

Parameter

Supplemental Specification

Input

Voltage Input

TTL Level square wave.

Impedance

10 KOhm.

Frequency

Range

Same as internal clock mode. See configuration limits.

Max Sync Input Slew Rate

< 80 Hz / sec. Changes in sync input frequency occurring faster than this rate will result in Error 804: External Sync Error. Output relay is opened on Error.

Max Sync Step

< 20 Hz. Sudden changes in sync input frequency greater than 20 Hz will result in Error 804: External Sync Error. Output relay is opened on Error.

Mode Selection

When switching between INT and EXT sync mode, the output of the AC source will be dropped momentarily.

Restrictions

Frequency cannot be programmed in external sync mode. Frequency transient list system is not available in sync mode. Transient list dwell times are not correlated to external sync but based on internal timebase.

2.6.6 –EXS Option Lx Series - Supplemental Specifications

The –EXS (External Sync) option allows the output frequency of the AC source to be synchronized to an external TTL level clock signal.

The following supplemental specifications apply when the Lx is configured with the external sync option. (EXS).

User Manual Lx / Ls Series

Output Options

-AX

Auxiliary outputs, 5 VAC and 26 VAC, 400 Hz. (Output D and E)

- HV

156 / 312 V range output

- EHV

200 / 400 V range output

-HF

High frequency option. Increases output frequency to 5000 Hz (single chassis configurations) or 2000 Hz (multi-chassis models).

-LF

Low frequency option. Limits maximum output frequency to 500 Hz.

-MODE

Adds single phase and three phase mode switching capability to –3 LS models. Not available on –1 models.

Firmware Options

- 704

Mil Std 704 test firmware. Includes AC tests for Revisions D and E

- 704F

Mil Std 704 test firmware. Includes AC tests for Revisions A through F

- 160

RTCA/DO-160D test firmware. Includes RCTA-DO160D, section 16, Change #2 and EURO/CAE-14D AC tests only.

Misc. Options

-ADV

Advanced features package. Adds arbitrary waveform generation and harmonic analysis measurements. For specifications, see Lx Series.

-GPIB

GPIB interface. Also adds APE command language support for backward compatibility with L Series. See Lx/Ls Programming Manual P/N 7004-961 for detail on APE command language.

-L22

Locking Knobs. Shaft lock screws replace knobs to prevent turning of Voltage and Frequency shuttles.

-LKM

Clock and Lock Master. Enables synchronizing outputs of two Lx AC sources, one acting as master. This mode supports a frequency range of 45 to 819 Hz on standard Lx/Ls models. See section 3.9.

-LKS

Clock and Lock Auxiliary. See -LKM for details. (See Notes, see section

3.9.)

-LNS

Line Sync (see Notes)

-EXS

External Sync (see Notes)

-RMS

Set of 2 Rack mount slides. (Left and Right) Recommended to mount Lx Chassis in 19 inch instrument cabinet.

Notes:

2.7 Available Options – Ls Series

User Manual Lx / Ls Series

Voltage:

Ranges (L-N):

Low range

0 - 156 Vrms

High range

0 - 312 Vrms

Maximum Current at Full Power

Note: Current, maximum amps per phase available at on low voltage range. 3000Ls and 4500Ls

Model

3000Ls-HV

4500Ls-HV

6000Ls-HV

Single Phase Mode: Max. RMS, low Vrange

38.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

12.8 A

Note: Current derates linearly from 50% of voltage range to 20% of specified current at 10% of

voltage range. Current in High voltage range is reduced by a factor of 2.

Note: For 9000Ls/2-HV and 12000Ls/2-HV, currents are 2 x 4500Ls-HV and 6000Ls-HV.

For 13500Ls/3-HV and 18000Ls/3-HV, currents are 3 x 4500Ls-HV and 6000Ls-HV

Maximum Current at Full Scale Voltage

Model

3000Ls-HV

4500Ls-HV

6000Ls-HV

Single Phase Mode: Max. RMS, low Vrange

19.2 A

28.8 A

38.4 A

Three Phase Mode: Max. RMS, low Vrange per phase

6.4 A

9.6 A

12.8 A

2.7.1 -HV Option Ls Series - Supplemental Specifications

Specifications for Ls units with -HV voltage range option installed are same as standard Ls unit except where noted below.

User Manual Lx / Ls Series

Frequency Range

Model

3000Ls-HF, 4500Ls-HF

, 6000Ls-HF

9000Ls/2-HF, 13500Ls/3-HF

12000Ls/3-HF, 18000Ls/3-HF

Three phase mode

45 Hz - 5000 Hz

45 Hz - 2000 Hz

Single phase mode

45 Hz - 5000 Hz

45 Hz - 2000 Hz

Output

Programming Accuracy:

< 1000 Hz ± (0.05% + 0.25 V) from 5V to FS.

> 1000 Hz ± (0.1% + 0.1% / KHz + 0.3V) from 5V to FS

Output Noise: (20 kHz to 1 MHz)

< 250 mV

RMS typical

Parameter

Range

Accuracy ( )

Resolution

1 Phase Mode

3 Phase Mode

Frequency1

45.00 - 5000.0 Hz

0.1% ± 1 digit

0.01 Hz to 81.91 Hz

0.1 Hz to 819.1 Hz

1 Hz > 819.1 Hz

Phase

45.00 - 100.0 Hz

100.0 - 2000 Hz > 2000 Hz

0.5° 2° 5°

0. 1°

RMS Voltage

0 - 400 Volts < 1000 Hz > 1000 Hz

0.05% + 0.25V

0.1% + 0.1% / KHz + 0.3V

0.01 Volt RMS Current

0 - 50 Amps

0.5% + 0.15A

0.5% + 0.05A

0.001 Amp

Peak Current

0 - 150 Amps

0.5% + 0. 5A

0.5% + 0.15A

0.001 Amp

Crest Factor

1.00 – 10.00

1.5 %

0.01

VA Power

0 - 6 KVA

0.5% + 9 VA

0.5% + 3 VA

1 VA

Real Power

0 - 6 KW

0.5% + 9 W

0.5% + 3 W

1 W

Power Factor

0.00 - 1.00

0.03

0.01

2.7.2 EHV Option Ls Series -Supplemental Specifications

Specifications for Ls units with -EHV voltage range option installed are same the Lx with –EHV option. See paragraph 2.6.2.

2.7.3 -HF Option Supplemental Specifications

Specification for Ls units with -HF frequency range option installed are same as standard Ls unit except where noted below.

For output frequencies up to 1000 Hz, refer to standard measurement specifications. For output frequencies above 1000 Hz, see table below.

Frequency measurement specifications valid with output voltage of 30Vrms or higher. If output relay is open,

frequency measurement will return 0.0 Hz.

User Manual Lx / Ls Series

Note: Accuracy specifications are valid above 100 counts. For multi-chassis configurations, Current and Power range and accuracy specifications are times the number of chassis.

Note: Frequency measurement specification valid for output > 20 Vrms. Note: Crest Factor accuracy applies for Irms > 50% of max. Note: Power factor accuracy applies for PF > 0.5 and VA > 50 % of max.

Parameter

Supplemental Specification

Phase D Output

Voltage

26.0 Vrms ± 0.52 V

Load Regulation

1.5 %

Voltage Distortion

< 1.0 % THD

Max. Current

3.0 Arms

Frequency range:

360 – 440 Hz, locked to programmed frequency. If programmed frequency exceeds 819 Hz, -AX outputs will turn off.

Phase error to phase A

< 3.0°

Phase E Output

Voltage

5.0 Vrms ± 0.25 V

Load Regulation

< 10 %

Max. Current

1.0 Arms

Frequency range:

360 – 440 Hz, locked to programmed frequency. If programmed frequency exceeds 819 Hz, -AX outputs will turn off.

Phase error to phase A

< 3°

Parameter

Supplemental Specification

Voltage

Voltage Distortion

Standard: standard specifications apply. With –HF option: < 2 % [45 - 1000 Hz] < 2 % + 1%/kHz [> 2000 Hz] (harmonics and noise to 300 kHz)

2.7.4 -AX Option Ls Series - Supplemental Specifications

Specifications for -AX auxiliary output voltage option on the Ls units are listed below. This output is available on the Phase D and E terminal strip. There is no external sense connection for the – AX outputs. Sense is internal only. Specifications apply for programmed frequency range of 360 Hz to 440 Hz.

2.7.5 -LKM and -LKS Options Ls Series - Supplemental Specifications

The following supplemental specifications apply when the Ls is configured with the Clock and Lock option. (-LKM or –LKS).

User Manual Lx / Ls Series

Parameter

Supplemental Specification

Frequency

Range

Standard Lx: 45 – 819 Hz With –HF option: 45 - 5000 Hz.

Resolution

Standard Lx: 0.1 Hz With –HF option: 1 Hz

Accuracy

± 0.025%

Phase

Phase Resolution

Standard: standard specifications apply. With –HF option: 0.5°

Phase Accuracy

Standard: standard specifications apply. With –HF option: < 2° + 1°/kHz

Parameter

Supplemental Specification

Input

Voltage Input

TTL Level square wave.

Impedance

10 KOhm.

Frequency

Range

Same as internal clock mode. See configuration limits.

Max Sync Input Slew Rate

< 80 Hz / sec. Changes in sync input frequency occurring faster than this rate will result in Error 804: External Sync Error. Output relay is opened on Error.

Max Sync Step

< 20 Hz. Sudden changes in sync input frequency greater than 20 Hz will result in Error 804: External Sync Error. Output relay is opened on Error.

Mode Selection

When switching between INT and EXT sync mode, the output of the AC source will be dropped momentarily.

Restrictions

2.7.6 –EXS Option Ls Series - Supplemental Specifications

The –EXS (External Sync) option allows the output frequency of the AC source to be synchronized to an external TTL level clock signal.

The following supplemental specifications apply when the Ls is configured with the external sync option. (EXS).

User Manual Lx / Ls Series

3. Unpacking and Installation

3.1 Unpacking

Inspect the unit for any possible shipping damage immediately upon receipt. If damage is evident, notify the carrier. DO NOT return an instrument to the factory without prior approval. Do not destroy the packing container until the unit has been inspected for damage in shipment. If possible, retain the container in the event the system ever has to be returned to the factory for either repair of upgrades

WARNING: This power source weighs approximately 175 lbs / 79.2 Kg per chassis (2

chassis total) Obtain adequate help when moving or installing the unit. Make sure the

cabinet and rack slides used to install the Lx or Ls Series unit(s) can support the weight of the unit(s).

3.2 Power Requirements

The Lx / Ls Series power Source has been designed to operate from a three-phase, three wire (Wye or Delta) AC input line. A protective earth connection is required as well. (PE).

Available three-phase input setting is 208 to 230 VLL nominal for standard Lx / Ls models or 400 VLL nominal for Lx / Ls Series with option –400. All three phase input is three wire plus ground.

The 3000Lx/Ls model with standard 208V L-L AC input may be operated from a single phase 208-230 V L-N AC input as well. In this case, the single phase AC must be connected between TB3 L2-L3 inputs for 3000Lx or TB3 ØB – ØC inputs for 3000Ls. Note that input current will be significantly higher than for a 3 phase AC input connection so wire size and AC disconnects used must be sized accordingly.

CAUTION: Do not connect 400V into a unit designed for 208 use. The result could be

a severely damaged unit. Always check the input rating on the model number tag before connecting AC input power. AC voltage input settings CANNOT be changed in the field.

3.3 Mechanical Installation

The Lx / Ls Series AC power sources can be used free standing on a solid surface or mounted in

a 19” instrument cabinet. The units are fan cooled, drawing air in from the side and exhausting

at the rear. The back of each unit must be kept clear of obstruction and a 3” clearance must be maintained to the rear. Special consideration of overall airflow characteristics and the resultant internal heat rise must be considered at all times to avoid self heating and over temperature problems.

Multi chassis configurations such as the 9000Lx/2 or 9000Ls/2 consist of two self-contained 4500Lx or 4500Ls power sources. They must be connected through the system interface using the supplied DB25 to DB25 cable. Output wiring from each chassis to the EUT must be of equal wire gage and length to ensure proper current sharing between units.

Note that for multi-chassis systems, it is recommended to turn the Master unit ON first and then the Auxiliary unit(s). To turn the system off, turn OFF the Auxiliary unit(s) first and then the Master unit.

User Manual Lx / Ls Series

FLT INH OUT1 IN1 RPV

TRIGGER

IEEE-488

RS232C

AUX OUTPUT OUTPUT

HI LO HI LO

26VAC

5VAC

Ø1

Ø2

Ø3

COM

SENSE

Ø1 Ø2 Ø3

COM

300 VAC MAX TO

TO MASTER INTERFACE

TO AUXILIARY INTERFACE

CLOCK

LOCK

SERIAL TAG

L1 L2 L3

INPUT

OUTPUT SAFETY COVER

INPUT

SAFETY

COVER

VOLTAGE INPUT

RATING

Figure 3-1: Rear Panel Connector Locations – Lx Series

User Manual Lx / Ls Series

J3-DFI INH FSTB TRIG RPV

J5 - IEEE-488

RS232C

AUX OUTPUT TB2

HI LO HI LO

ØA

ØB

ØC

NEUT

ØA HI ØB HI ØC HI

NEUT

TO MASTER INTERFACE

TO AUXILIARY INTERFACE

CLOCK

LOCK

SERIAL TAG

øA øB øC

GND

INPUT

TB3

OUTPUT SAFETY COVER

INPUT

SAFETY

COVER

VOLTAGE INPUT

RATING

J6 EXT SENSE

øD

øE

OUTPUT

TB1

36/27

31/14

Figure 3-2: Rear Panel Connector Locations – Ls Series

User Manual Lx / Ls Series

3.4 AC Input Wiring - INPUT

AC input connections are to be made directly to the input fuse block of all units that make up a Lx / Ls system. The input block is located on the lower right hand corner of the back of the 4500Lx/Ls and 4500Lx/Ls-NO chassis. It is labeled “INPUT” on the Lx and “INPUT TB3” on the Ls models.

Ground (earth) wire must be connected to the chassis of the AC power system using the ground connection of the AC input fuse block. The mains source must have a current rating equal to or greater than the input fuses and the input wiring must be sized to satisfy the applicable electrical codes.

The input power cables must be large enough to handle the input current of the power source and must conform to local electrical codes. Consult a qualified electrician prior to installation. Note that all wires must be sized to accommodate the worst-case maximum current that may occur under low line conditions. Local electrical codes may also require different wire types and sizes.

Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate the voltage drop from the following formula:

2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP

Note: If possible, keep input cable lengths for Master and Auxiliary chassis equal.

CAUTION: Capacitors in the power source may hold a hazardous electrical charge

even if the power source has been disconnected from the mains supply. Allow capacitors to discharge to a safe voltage before touching exposed pins of mains supply connectors. Power modules need at least 10 Minutes to discharge to safe levels before they can be removed.

3.5 Output Connections

3.5.1 Output Wiring

The output terminal blocks for each unit are located at the rear of the unit. Three phase output connections are made to the terminal block labeled OUTPUT. For a 9000Lx/2 or 9000Ls/2two box system, the output terminals from both the master 4500Lx or 4500Ls and Auxiliary 4500Lx or 4500Ls must be connected together. See Figure 3-3.

On Lx Series, the phase outputs are labeled ø1, ø2, ø3 and COM. (Same labeling as Hewlett Packard / Agilent HP6834 and California Instruments iL Series) The common (neutral) connection (if needed) can be made on the same terminal block labeled COM. If the power source is operated in single-phase mode, all power is available from the ø1 output connection. The neutral connection (COM) is always required for single-phase output mode on a 9000Lx/2 and may be used if needed for the EUT for all three-phase output modes.

On Ls Series, the phase outputs are labeled øA, øB, øC and NEUT. (Same labeling as California Instruments L Series) The neutral connection (if needed) can be made on the same terminal block labeled COM. If the power source is a single-phase model or operated in single phase mode, all power is available from the øA output connection. The neutral connection (COM) is

User Manual Lx / Ls Series

always required for single-phase output mode on a 9000Ls/2 and may be used if needed for the EUT for all three-phase output modes.

The external sense inputs allow the power system output voltages to be monitored directly at the load and must be connected at external sense connector. The external sense wires should be run as a twisted pair for short lengths. Sense leads over three (3) feet long should be run as a twisted shielded pair.

Note: The output of the power source is isolated from the input line and floating with

respect to chassis ground. If needed, either side (HI or LO) may be grounded.

The output power cables must be large enough to prevent a total voltage drop exceeding 1% of the rated output voltage between the power source and the load. Note that wires must be sized to accommodate the maximum current that is available. This may be a function of the voltage range and phase mode of the Lx \ Ls model on hand. Always use the current available on the low voltage range to size the wires.

Cable lengths must not exceed twenty-five (25) feet. For lengths greater than 25 feet, calculate the voltage drop from the following formula:

2 X DISTANCE X CABLE RESISTANCE PER FT. X CURRENT = VOLT DROP

Note: Ensure that output cable lengths from Master and Auxiliary chassis to EUT are of

identical length.

User Manual Lx / Ls Series

Connector

Terminal

Mode

Lx Output

OUTPUT

Ls Output

TB1

3 Phase & 1 Phase

Ø1

ØA 2

3 Phase

Ø2

ØB 3

3 Phase

Ø3

ØB 4

Common / Neutral

COM

NEUT

3.5.2 Output Terminal Block - OUTPUT

Each 3000/4500/6000Lx\Ls chassis has a single AC output terminal block. For tabletop operation of a single chassis system, the output terminal block must be covered using the supplied AC Output safety cover. The terminal blocks are large enough to accommodate required wire gauge sizes. The terminal block is located in the upper left corner on the rear panel of the unit. (Looking from the back).

Multi-chassis configurations have two or more output terminal blocks, one on the master Lx \ Ls chassis and one of the auxiliary Lx \ Ls chassis.

For operation as a multi-chassis system, the outputs of all Lx \ Ls chassis’ must be connected together using the additional terminal blocks provided in the Lx \ Ls ship kit. Keep the wire

lengths between each chassis and this common terminal block the same.

See Figure 3-3 for output wiring diagram.

Table 3-1: Output Terminal connections.

User Manual Lx / Ls Series

FLT INH OUT1 IN1 RPV

TRIGGER

IEEE-488

RS232C

AUX OUTPUT OUTPUT

HI LO HI LO

26VAC

5VAC

Ø1

Ø2

Ø3

COM

SENSE

Ø1 Ø2 Ø3

COM

300 VAC MAX TO

TO MASTER INTERFACE

TO AUXILIARY INTERFACE

CLOCK

LOCK

FLT INH OUT1 IN1 RPV

TRIGGER

RS232C

AUX OUTPUT OUTPUT

HI LO HI LO

26VAC

5VAC

Ø1

Ø2

Ø3

COM

SENSE

Ø1 Ø2 Ø3

COM

300 VAC MAX TO

TO MASTER INTERFACE

TO AUXILIARY INTERFACE

CLOCK

LOCK

9000Lx/2 TERMINAL BLOCK

LOAD

MASTER

AUXILIARY

L1 L2 L3 GND

AC SERVICE

ø1 ø2 ø3

SERIAL TAG

L1 L2 L3

INPUT

SAFETY

COVER

VOLTAGE INPUT

RATING

SERIAL TAG

L1 L2 L3

INPUT

SAFETY

COVER

VOLTAGE INPUT

RATING

3.5.3 Multi-chassis Output Wiring Diagram

Figure 3-3 shows the required output connections for a 9000Lx/2 or 9000Ls/2 two chassis system (rear-view perspective). Always turn off AC mains power to the 9000Lx/2 or 9000Ls/2

by turning off the circuit breakers on both the Master and Auxiliary 4500Lx / Ls power source before making or changing output connections. The terminal block shown to connect

the outputs of both chassis together is provided in the 9000Lx/2 or 9000Ls/2 ship kit. The System Interface cable is a DB25 to DB25 M/F cable approximately 2 meters in length. (CI P/N 250778). This cable connects between the male DB25 connector on the Master unit rear panel labeled TO AUXILIARY INTERFACE and the female DB25 connector on the Auxiliary unit rear panel labeled TO MASTER INTERFACE as shown in Figure 3-3. The OUTPUT SAFETY COVER must be removed to use the System Interface and the AC Source must be installed in a cabinet with a protective rear screen or door.

Figure 3-3: 9000Lx/2 and 9000Ls/2 Output Wiring

User Manual Lx / Ls Series

Figure 3-4: 9000Lx/2, 9000Ls/2, 12000Lx/2 or 12000Ls/2 Wiring diagram - 3 Phase mode

User Manual Lx / Ls Series

Figure 3-5: 13500Lx/2, 13500Ls/3, 18000Ls/3 or 18000Ls/3 Wiring diagram - 3 Phase mode

User Manual Lx / Ls Series

Connector

Lx Series

AC Input (INPUT)

Function

Connects To

L1 – AC in L2 – AC in L3 – AC in CHASSIS - GND

Primary AC Power Input

208 - 230 VAC nominal (Std) 400 VAC nominal (-400 option) Note: For 3000Lx/Ls operated from single-phase AC input, use L2-L3.

AC Output (OUTPUT)

Function

Connects To

Ø1 Ø2 Ø3 COM

AC output

User Load

External Sense

Function

Table

Sense Ø1, Ø2, Ø3, COM

External Sense

Table 3-7

Ls Series

AC Input (INPUT TB3)

Function

Connects To

ØA – AC in ØB – AC in ØC – AC in CHASSIS - GND

Primary AC Power Input

208 - 230 VAC nominal (Std) 400 VAC nominal (-400 option) Note: For 3000Lx/Ls operated from single-phase AC input, use ØB- ØC.

AC Output (OUTPUT TB1)

Function

Connects To

ØA ØB ØC NEUT

AC output

User Load

External Sense

Function

Table

Sense ØA HI, ØB HI, ØC HI, NEUT

External Sense

Table 3-7

Lx and Ls Series

Remote Control

Function

Table

RS232

Serial Control Interface

Table 3-8

IEEE-488

GPIB Control Interface

See IEEE-488 standard for pin out.

System Interface

Function

Table

Master

Connects to Master

DB25, MALE

Auxiliary

Connects to Auxiliary

DB25, FEMALE

Lx Series

Other

Function

Table

SMA Connectors

Discrete Fault Indicator

Table 3-4

Remote Inhibit

Table 3-4

Trigger Out1 (Function Strobe)

Table 3-4 Trigger In1

Table 3-4

3.6 Connectors - Rear Panel

A number of connectors are located along the top rear covers. These connectors are in a recessed area to protect them from shipment damage. A summary of available connectors is provided in the table below.

User Manual Lx / Ls Series

Connector

RPV (N/A)

Table 3-4

BNC Connectors

Clock

Table 3-6 -LKM / -LKS option

Lock

Table 3-6

Ls Series

Other

Function

Table

SMA Connectors

Discrete Fault Indicator

Table 3-4

J7-36+ / J7-27(Remote Shutdown)

Table 3-4 Function Strobe

Table 3-4

Trigger

Table 3-4

RPV (N/A)

Table 3-4

BNC Connectors

J1 - Clock

Table 3-6 -LKM / -LKS option

J2 - Lock

Table 3-6

INPUT.

Designator Lx Series

Designator Ls Series

Direction

Connection Description

ØA

Input

AC Line

ØB

Input

AC Line

ØC

Input

AC Line

GND

Gnd symbol

Chassis Ground

SMA

Description

FLT

Discrete Fault Indicator output. Isolated Open Collector. Can be used to signal external devices when a fault condition is detected.

INH

Remote Inhibit. (TTL input)

TRIGGER

Trigger Output (TTL output)

Table 3-2: Rear Panel Connectors

3.6.1 AC Input Connector – INPUT

See section 3.4 for details on connecting AC input power. Labeled INPUT on Lx models, INTPUT TB3 on Ls models.

Table 3-3: AC Input Terminal Block Connection Description

3.6.2 SMA Connectors – Lx Series

SMA connectors. Functions are called out on rear panel decal. Table 3-4 shows connections from left to right when standing at the rear of the Lx cabinet. SMA connectors are small high frequency capable coax connectors that can be screwed down securely to prevent signal loss. Adaptor for SMA to BNC conversion are readily available.

To connect these signals using more conventional BNC cables, SMA Male to BNC Female adapters may be used. These are available from www.pasternack.com , P/N PE9074.

PE9074 Adaptor.

User Manual Lx / Ls Series

SMA

Description

OUT1

(Can be set to Function Strobe for compatibility with CI L Series)

TRIGGER

IN1

Trigger Input (TTL input)

RPV

Not Used.

SMA

Description

J3 DFI

Discrete Fault Indicator output. Isolated Open Collector. Can be used to signal external devices when a fault condition is detected.

J7 36/27 INH

Remote Shutdown. (Inhibit) (TTL input) Equivalent to J7-36 (+) and J7-27 (-) on CI L Series.

J7 31/14 FSTB

Function Strobe (Can be set to Trigger Output (TTL output) for compatibility with CI iL Series) Equivalent to J7-31 (+) and J7-14 (-) on CI L Series.

TRIG

Trigger Input (TTL input)

RPV

Not Used.

Table 3-4: SMA Connectors – Lx Series

3.6.3 SMA Connectors – Ls Series

SMA connectors. Functions are called out on rear panel decal. Table 3-5 shows connections from left to right when standing at the rear of the Ls cabinet. SMA connectors are small high frequency capable coax connectors that can be screwed down securely to prevent signal loss. Adaptor for SMA to BNC conversion are readily available.

To connect these signals using more conventional BNC cables, SMA Male to BNC Female adapters may be used. These are available from www.pasternack.com , P/N PE9074.

PE9074 Adaptor.

Table 3-5: SMA Connectors – Ls Series

User Manual Lx / Ls Series

BNC

Ls Series

Ref.

Description

CLOCK

Clock Option (TTL output on Master / TTL input on Auxiliary) N/A

LOCK

Lock Option (TTL output on Master / TTL input on Auxiliary) N/A

Description - Lx Series

Description - Ls Series

Phase 1 sense Hi

Phase A sense Hi

Phase 2 sense Hi

Phase B sense Hi

Phase 3 sense Hi

Phase C sense Hi

Neutral sense

-AX Option Phase D Hi – N/A

-AX Option Phase D Lo – N/A

Designator

Dir.

Description

Not used

N/C 2 TxD

Output

Transmit data

RxD

Input

Receive data

Not used

N/C 5 Common

Common

Not used

N/C 7 CTS

Input

Clear to send

RTS

Output

Request to send

Not used

N/C

3.6.4 BNC Connectors (-LKM / -LKS options)

BNC connectors. Functions are called out on rear panel decal. Table 3-6 shows connections for the optional -LKM and -LKS clock and lock mode. Refer to section 3.9 for more details.

Table 3-6: BNC Connectors

3.6.5 External Sense Connector – SENSE

The external sense connections for Phase 1, 2 and 3 (A, B and C) in three-phase mode and Phase 1 (A) in single phase mode MUST be connected for correct operation. Sense connections must be made at the MASTER 4500Lx/Ls unit for a multi-box Lx/Ls system.

Table 3-7: External Sense Connector

3.6.6 RS232C Serial Interface – RS232C

A standard RS232C DB9 connector is located on the rear panel for serial control. A straight thru DB9 male to DB9 female interface cable to 9-pin PC serial port connector may be used

Table 3-8: RS232C Connector

User Manual Lx / Ls Series

3.6.7 System Interface Connectors – MASTER and AUXILIARY

WARNING: The system interface connectors are for use with California Instruments

supplied cables, and only between California Instruments equipment.

A set of two System Interface connectors is located on the rear panel of each 4500Lx/Ls chassis. The system interface is used to connect the multiple 4500Lx/Ls or 6000Lx/Ls power sources in a Master/Auxiliary configuration to create a 9000Lx/Ls/2, 12000Lx/Ls/2, 13500Lx/Ls/3 or 18000Lx/Ls/3 AC power source configuration. In this configuration, only the Master power source has a built-in controller and front panel. The System Interface cable provided in the Lx or Ls Series ship kit (CI P/N 250778) MUST be used to connect both chassis as shown in Figure 3-3.

Note that no user accessible signals are provided on the System Interface connections and they should only be used for their intended purpose. To use the System Interface capability, the output safety cover has to be removed. As such, multi-chassis configurations cannot be used outside of a cabinet with proper rear screens.

User Manual Lx / Ls Series

3.7 Basic Initial Functional Test

CAUTION: Work carefully when performing these tests; hazardous voltages

are present on the input and output during this test.

Refer to Figure 3-3 for the required functional test set up. Proceed as follows to perform a basic function check of the power system:

1. Verify the correct AC line input rating on the nameplate of the Lx/Ls unit(s) and make sure the correct three-phase line voltage is wired to the input of the Lx/Ls before applying input power.

2. Connect a suitable resistive or other type load to the output of the Lx or Ls. Suggested load values for the low voltage range rounded up to the nearest 0.1 Ohm are shown in Table 3-9 for the Lx Series and Table 3-10 for the Ls Series. For the high voltage range, the resistor values must be multiplied by four. For models with – HV or –EHV voltage range option, recalculate these values by adjusting for the voltage range value. Make sure the power resistor has sufficient power dissipation capability for full load test and that the load used does not exceed the maximum power rating of the AC source. For three phase configurations, this test can be performed on one phase at a time if needed.

3. Connect an oscilloscope and DMM / voltmeter to the AC source output. Set both for AC mode.

4. If the correct voltage is present, turn on the Lx/Ls unit(s) by closing the On/Off circuit breaker on the front panel of both chassis.

5. Set the output voltage to 0 volt and close the output relay with the OUTPUT ON/OFF button. There should be little or no output although the DMM may show a noise level, especially if the DMM is in auto ranging mode.

6. Select the Set screen and use the voltage shuttle to program a small voltage (20 VAC). Observe the DMM reading. The reading should track the programmed voltage.

7. Also monitor the scope. The output should be a sinusoidal voltage waveform.

8. If the output tracks, increase the voltage till you reach 80 % of the voltage range or more. Check the output voltage reading and waveform.

9. Select the measurement screen by pressing the Meas button. The output voltage, current and power will be displayed. For three phase configurations, use the PHASE button to select individual phase data. If all phases are loaded equally, the same current and power should be visible for all three unless the voltages are not programmed to the same level. If only one phase is loaded, current and power will only be shown for the loaded phase.

In the unlikely event the power source does not pass the functional test, refer to the calibration procedure in Section 6 or call California Instrument’s customer satisfaction department for further assistance.

User Manual Lx / Ls Series

Model

3 Phase Mode, 150 V range

1 Phase Mode, 150 V range

3000Lx

22.5 Ohm

7.5 Ohm

4500Lx

15 Ohm

5.0 Ohm

6000Lx

11.8 Ohm

4.0 Ohm

9000Lx

7.5 Ohm

2,5 Ohm

12000Lx

5.9 Ohm

2.0 Ohm

13500Lx

5.0 Ohm

1.7 Ohm

18000Lx

4.0 Ohm

1.4 Ohm

Model

3 Phase Mode, 135 V range

Model

1 Phase Mode, 135 V range

3000Ls-3

18.3 Ohm

3000Ls-1

6.1 Ohm

4500Ls-3

12.2 Ohm

4500Ls-1

4.1 Ohm

6000Ls-3

9.2 Ohm

6000Ls-1

3.1 Ohm

9000Ls-3

6,1 Ohm

9000Ls-1

2.1 Ohm

12000Ls-3

4.6 Ohm

12000Ls-1

1.6 Ohm

13500Ls-3

4.1 Ohm

13500Ls-1

1.4 Ohm

18000Ls-3

3.1 Ohm

18000Ls-1

1.1 Ohm

Table 3-9: Full Load Resistance – Lx Series

Table 3-10: Full Load Resistance – Ls Series

User Manual Lx / Ls Series

3.8 Multi-box Configurations (-MB Option)

Multi-box configurations are identical to a two or three box system except each chassis (box) has its own controller. When connected as a multi-chassis system through the system interface, the controller in the auxiliary chassis is disabled and the entire system is controller from the master unit. Operation is identical to a normal multi-box model. E.g. a 9000Lx/2-MB is connected and operated the same way as a 9000Lx/2. While a 9000Lx/2 will have once chassis with a blank front panel, a 9000Lx/2-MB will have a controller on both front panels of which only one is used when configured as a 9000Lx/2. The other controller will display a message indicating it is operating as an auxiliary unit1.

The benefit of the –MB option is that both units can be separated and operated independently. To so do, proceed as follows:

1. Turn off both units.

2. Disconnect the output terminals (1,2,3, COM or A,B,C, NEUT) from each other.

3. Disconnect the system interface cable between the two (or three) units.

When powered up, each unit will power up as a stand-alone unit. Connection diagrams for a – MB system are identical to those for a 9000Lx/Ls/2, 12000Lx/Ls/2, 13500Lx/Ls/2 or 1800Lx/Ls/3. See section 3.5.3, Figure 3-4 and Figure 3-5 for wiring diagrams.

3.8.1 Power Up and Power Down sequence.

A multi-box Lx/Ls system can be turned on in either other. Generally, it is recommended to turn on the auxiliary unit before turning on the master unit and turn off in the opposite order but no damage will occur if the order is reversed.

Note: It is not recommended to turn off either unit without turning off the other unit and

then turning it back on. This may result in miscellaneous error messages occurring on the unit that was not powered down. If one unit has been turned off, turn off all units first before turning the system back on.

If a master unit is to be used by itself, it is not sufficient to just leave the auxiliary unit off while the system interface cable remains connected. Disconnect the system interface from the back of the master unit and then turn the unit on for stand-alone use.

This message will disappear when the controls on the auxiliary unit are operated. However, changing settings on the auxiliary unit controller will not affect the output. Use the master unit controller and or remote control interface to operate the system.

User Manual Lx / Ls Series

3.9 Clock and Lock Mode (-LKM/-LKS Option)

Clock and lock mode operation of two or more Lx or Ls AC power sources is available only if the –LKM and –LKS options have been installed at the factory. With these options installed, it is possible to lock an auxiliary unit (-LKS) to a master unit (-LKM). The master unit controls the frequency. This configuration can be used to create multiphase power systems such as splitphase or six phases. The auxiliary unit must be set to external clock mode from the Control screen. See section 4.2.5.

Two BNC connectors are provided on the rear panel of the Lx/Ls for clock and lock mode. Both need to be connected between the master and auxiliary unit. On the master unit (-LKM), both are outputs. On the slave unit (-LKS), both are inputs. Do not connect these BNC’s between two master units (-LKM’s) or damage to the unit could result.

Refer to Figure 3-6 for the required connections between the –LKM and –LKS units. The example is shown for two units, one master, one auxiliary. More than one auxiliary can be used to create additional phase outputs. In this case, the BNC cables can be daisy chained using BNC T connectors.

WARNING: DO NOT CONNECT THE AC OUTPUTS OF THE –LKM AND –LKS UNITS

TOGETHER. CLOCK AND LOCK OUTPUTS CANNOT BE PARALLELED TO OBTAIN HIGHER OUTPUT CURRENTS.

Do not use clock and lock mode to obtain higher power capability on the same phase(s). For higher power configurations, use the multi-chassis configuration through the system interface connection instead. Refer to section 3.5.3 for multi-chassis configuration and connection information.

The frequency of the auxiliary unit will track that of the master. The output phase angle of phase 1/A will be locked to the auxiliary unit as well to within 3°. This allows split phase or six phase configurations to be created.

3.9.1 Configuration settings

Units configured with the –LKM option will show the Clock as INT (internal) and the mode as CLK/LOC on the CONTROL screen. Units configured with the –LKS option can be set to INT (internal) or EXT (external) clock from the CONTROL screen. The MODE setting on the CONTROL screen of the –LKS unit determines the power on state for the clock setting. When set to STAN (Stand-alone operation), the unit powers up with INT clock. When set to CLK/LOC mode, it powers up in EXT clock mode suitable to clock and lock system operation. See section

4.2.5 for details.

3.9.2 Frequency measurements on –LKS units

Lx or Ls models configured with the –LKS option used in a clock and lock configuration will not accurately measure frequency if the programmed frequency of the master unit (-LKM) exceeds 2000 Hz unless the frequency setting of the –LKS is set to the a value close to the programmed frequency of the –LKM master unit. Setting the –LKS programmed frequency when it is operating as a clock and lock auxiliary does not affect its actual output frequency as it is controlled by the – LKM master unit. This provides the controller with the required information to accurately measure the frequency.

User Manual Lx / Ls Series

FLT INH OUT1 IN1 RPV

TRIGGER

IEEE-488

RS232C

AUX OUTPUT OUTPUT

HI LO HI LO

26VAC

5VAC

Ø1

Ø2

Ø3

COM

SENSE

Ø1 Ø2 Ø3

COM

300 VAC MAX TO

TO MASTER INTERFACE

TO AUXILIARY INTERFACE

CLOCK

LOCK

FLT INH OUT1 IN1 RPV

TRIGGER

RS232C

AUX OUTPUT OUTPUT

HI LO HI LO

26VAC

5VAC

Ø1

Ø2

Ø3

COM

SENSE

Ø1 Ø2 Ø3

COM

300 VAC MAX TO

TO MASTER INTERFACE

TO AUXILIARY INTERFACE

CLOCK

LOCK

EUT1 TERMINAL BLOCK

LOAD

CLL/LK

MASTER

(-LKM)

CLK/LK

AUXILIARY

(-LKS)

L1 L2 L3 GND

AC SERVICE

ø1 ø2 ø3

COM

SERIAL TAG

L1 L2 L3

INPUT

SAFETY

COVER

VOLTAGE INPUT

RATING

SERIAL TAG

L1 L2 L3

INPUT

SAFETY

COVER

VOLTAGE INPUT

RATING

EUT2 TERMINAL BLOCK

LOAD

ø1 ø2 ø3

300 VAC MAX TO

CLK/LK

BNC

CABLES

WARNING:

DO NOT CONNECT

OUTPUTS OF

-LKM & -LKS UNITS TOGETHER

3.9.3 Lx versus Ls Differences

The Lx and Ls Series differ in how to control the phase angle of phase 1/A. On the Ls series, setting the phase angle for phase A on the auxiliary unit will result in all three phases of the auxiliary unit shifting by the same amount. Thus, programming the auxiliary unit to 60° on phase A will result in a 60 degree offset between the two phase A outputs, B outputs and C outputs.

On the Lx Series, programming phase 1 of the auxiliary unit does not rotate phase B and C on the auxiliary unit as well. There are two ways to accomplish this:

1. Program all three phases on the auxiliary unit with the same phase offset. Eg. Program phase 1 to 60°, phase 2 to 300° and phase 3 to 180°.

2. Set the phase 1/A offset calibration coefficient for phase 1/A to the desired offset. This will rotate all three phases, similar to setting the phase A angle on the Ls Series.

This discrepancy is caused by the requirement to maintain backward compatibility with the HP6834B, which did not support Clock and Lock capability.

Figure 3-6: Clock and Lock Connections

User Manual Lx / Ls Series

4. Front Panel Operation

4.1 Tour of the Front Panel

Before operating the AC source using the front panel, it helps to understand the operation of the front panel controls. Specifically, the operation of the knob, keyboard and the menu layout are covered in the next few paragraphs.

4.1.1 Front Panel Controls and Indicators

The front panel can be divided in a small number of functional areas:

Mains circuit breaker Keyboad/ Display panel:

Status Indicator lights Shuttle knobs (Voltage / Frequency) LCD display MENU and CURSOR keys

4.1.2 System On/Off Circuit Breaker

The circuit breaker located on the top left side of the front panel of the unit and disconnects the three phase Line input. As such, the circuit breaker acts as a power on/off switch for the Lx Series unit.

When the input current rating of the Lx/Ls Series AC power source is exceeded or an input over voltage condition occurs, the circuit breaker will trip.

User Manual Lx / Ls Series

4.1.3 Status Indicator Lights

Eight yellow LED status indicators are located on the left hand side of the keyboard/display panel. These LED’s correspond to the following conditions:

Hi Range The Hi Range LED is on when the high voltage output range

has been selected.

Overtemp The Overtemp LED indicates an overheating problem inside

the unit. This is an abnormal condition, which will cause the unit to shut off. Check the air openings to make sure they are not blocked.

Overcurrent The Overcurrent LED indicates an output overload condition.

This condition can be controlled by setting the current limit value in the PROGRAM menu. Removing the load using the OUTPUT ON/OFF button will recover from an overload condition when in CV mode.

Remote The Remote LED indicates that the unit is in remote control

mode. If the IEEE-488 interface is used, this indicator will be lit whenever the ATN line (Attention) line is asserted by the IEEE controller. If the RS232C interface is used, the REMOTE state can be enabled by the controller using the SYST:REM command. Any time the Remote LED is lit, the front panel of the power source is disabled. Note: The BACK button doubles as a GOTO LOCAL button (LOCAL) while the unit is in remote state. This allows the user to regain control of the front panel. The LOCAL button can be disabled by sending a Local Lockout bus command. This prevents unauthorized changes of settings in ATE applications.

Output on/off The Output on/off LED indicates the output relay status. If the

LED is off, the output relays for all output phases are open and the external sense lines are wrapped around internally. If the LED is on, the output relays are closed and the external sense lines are connected to the SENSE terminal block.

ØA, ØB, ØC The ØA, ØB, ØC LED indicates the output phase selection for

either settings or measurements. Phase selection can be changed using the Phase button to the right of the MEMU keys. Pressing the Phase button repeatedly will cycle through phase A, B, C and ALL PHASES. The ØA, ØB, ØC indicators correspond to outputs Ø1, Ø2 and Ø3 on the Lx Series rear panel and ØA, ØB, ØC on the Ls Series rear panel respectively. If all three phase selection LED's are lit, all three phases are selected and changes made to voltage and current limit settings will apply to all three phases. Note that in single phase mode, the ØA LED is always lit and the Phase button is inactive.

User Manual Lx / Ls Series

4.1.4 The Shuttle Knobs

Figure 4-1: Shuttle Knob

The shuttle knobs are located to the right of the LCD screen and are used to change setup parameters. Note that it cannot be used to move the cursor position between menu fields. Use the UP and DOWN arrow keys for this.

The shuttle knob can operate in one of two distinct modes of operation:

MODE DESCRIPTION

IMMEDIATE mode Any time the ENTER key is pressed, the Lx/Ls Series returns to

its normal mode of operation. In this mode, changes made with the shuttle knob will take immediate effect. The IMMEDIATE mode is useful for slewing output values such as voltage and frequency and observing the effect on the load.

SET mode When the Set key is pressed again while the PROGRAM screen

is already displayed, changes made with the shuttle to any output parameter will not take effect until the ENTER key is pressed. In this mode, any changes made to a setup menu will have a blinking cursor to indicate the pending change condition. This mode allows changes to be made to all output parameters and executing them all at once by pressing the ENTER key.

User Manual Lx / Ls Series

4.1.5 Menu Keys

The Lx/Ls Series is operated through a series of menu's. These menus can be reached by using a number of menu keys located along the bottom of the LCD display and the UP/DOWN cursors keys. Several menus have more than two entries. Since the LCD display only has two display lines, additional entries may not be visible and can be reached only by scrolling up or down using the UP/DOWN cursor keys. The following menu keys are available:

Figure 4-2: Menu Keys

KEY DESCRIPTION Set The Set key selects the output setting screen. While this screen

is displayed, the voltage and frequency shuttle knobs can be used to change voltage and frequency for the selected phase(s). Additional output settings such as current limit can be reached by using the down  cursor key.

For tests implemented in firmware such as the –160 and –704

options, the SET key can be used to skip to the next test in a test sequence.

Meas The Meas key selects the measurement screen for the selected

phase. If all three phases are selected, the measurement data for phase A will be displayed. There are no user changeable fields in the measurement screen. The voltage and frequency shuttles are active while the measurement screen is displayed. Additional measurement data can be displayed by using the up  and down  cursor keys.

Menu The top level menu is accessed by pressing the Menu key.

Refer to section 4.2 for details on available menus.

Enter The Enter key is used to confirm selections made in menu's or

to active settings made in SET mode.

Back The Back key may be used to back up to the previous menu

level or previously selected screen. It can also be used as a backspace key to delete the last digit entered.

For tests implemented in firmware such as the –160 and –704

options, the BACK key can be used to abort a test in progress.

If the unit is in remote mode, (Remote LED is lit), the front panel

of the power source is disabled. The BACK button doubles as a GOTO LOCAL button (LOCAL) while the unit is in remote state. This allows the user to regain control of the front panel. This LOCAL button can be disabled by sending a Local Lockout bus command. This prevents unauthorized changes of settings in ATE applications.

User Manual Lx / Ls Series

4.1.6 Cursor Keys

The cursor keys can be used to scroll through a list of menu entries.: CURSOR UP () The UP key moves the cursor position upwards one position to

the previous available cursor position. If the present cursor position is at the top of the right hand column, the cursor is moved to the bottom position of the left hand column. If the present cursor is at the top of the left hand column, the cursor is moved to the bottom of the right hand column.

CURSOR DOWN () The DOWN key moves the cursor position downwards one

position to the next available cursor position. If the present cursor position is at the bottom of the left hand column, the cursor is moved to the top position of the right hand column. If the present cursor is at the bottom of the right hand column, the cursor is moved to the top of the left hand column.

4.1.7 Output on/off Key

The Output on/off key located to the left of the Menu keys may be used to control the state of the output relays. The active state is indicated by the LED directly above the on/off key. If the output relays are open (LED is off), the output is floating. The ON/OFF button provides a convenient way to disconnect the load without having to remove any wires.

4.1.8 Phase Key

The Phase key may be used to select the desired output phase. (ØA, ØB, ØC or Ø1, Ø2, Ø3). Pressing the Phase button repeatedly will cycle through phase A, B, C and ALL PHASES. The ØA, ØB, ØC indicators correspond to outputs Ø1, Ø2 and Ø3 respectively.

If all three phase selection LED's are lit, all three phases are selected and changes made to voltage and current limit settings will apply to all three phases.

Note that in single-phase mode, the ØA LED is always lit and the Phase button is inactive.

User Manual Lx / Ls Series

4.1.9 LCD Display

The LCD display of the Lx/Ls Series power source provides information on instrument settings and also guides the user through the various menus. A sample of the measurement display screen is shown in Figure 4-3. Due to the two line (x 20 characters) display limitation of the LCD display, most menus are accessed by scrolling through two or more entries. Alternatively, the Menu key may be pressed repeatedly to access additional available menu entries.

The active cursor position is indicated by a LEFT POINTING ARROW () and can be moved by using the UP ()and DOWN () keys located to the right of the LCD display.

Figure 4-3: Measurement Screen

User Manual Lx / Ls Series

4.2 Menu Structure

The next few pages show a map of the available menus in the Lx/Ls Series. All menus can be reached by repeatedly pressing the Menu key. Frequently used menus have a short cut key that provides direct access. Examples of such menus are Program and Measurements. In any case, there are never more than two levels of menus although some menus may be spread across more than one screen.

4.2.1 Power on screens

At initial power up, the Lx/Ls Series power supply will display important configuration information in a series of power on screens. These displays are only visible for a short period of time and will not re-appear until the next time the unit is turned on.

There are three screens that will appear in the same order:

1. Company and firmware information. Displays the manufacturer (Cal Inst., which is short for California Instruments and the firmware part number and revision. The firmware part number starts with CIC followed by a three-digit code and dash number. The firmware revision has a major revisions before the decimal point and a minor revision after the decimal point.

2. Model and Serial number information. The model will be a function of the configuration and will include the series designation (LX). The serial number is a 5 digit number. This number should match the model type sticker located on the back of the unit.

3. Self test result. If all internal functions pass the power-on self-test, the message "SELF TEST PASSED" will appear. If any part of the internal self-test fails, an error message will be displayed instead. This information may be useful when calling in for service support.

Once the power on sequence is completed, the power source will always revert to the PROGRAM screen shown here.

The power source is now ready to be used.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

PROGRAM

The PROGRAM menu allows primary output parameters such as voltage, frequency, current limit, waveform shape and voltage range to be changed.

CONTROL

The CONTROL menu allows secondary setting parameters such as sense mode, phase mode and ALC mode to be changed.

MEASUREMENTS

The MEASUREMENT screen is not a menus in that no user entries are required. It displays read-back data.

TRANSIENTS

The TRANSIENTS menu allows output transients to be programmed.

REGISTERS

The SETUP REGISTERS menu allows complete instrument settings and transient list programs to be saved to nonvolatile memory.

CONFIGURATION

The CONFIGURATION menu allows changes to be made to configuration settings such as the IEEE-488 address, RS232C baudrate, power on state and Master/Auxiliary control mode.

OUTPUT CAL

The OUTPUT CAL menu provides access to the LCD viewing angle and Calibration password entry. If the correct calibration password is entered, additional Calibration screens can be accessed.

MEAS CAL

The MEAS CAL menu allows for calibration of the AC source measurement system.

APPLICATIONS

The APPLICATIONS menu provides access to the optional firmware application programs that may be installed in the Lx/Ls Series AC source.

OPTIONS

The OPTIONS menu provides access optional functions that may be present on the Lx/Ls unit.

ETIME/TEMP

The ETIME/TEMP screen displays the Elapsed time (Time the unit has been in operation) in hours, minutes and seconds. It also displays the internal temperature of the unit in degrees Celsius.

LIMITS

The LIMITS screen display the hardware configuration limits of the AC power source. It is for display purposes only and the user can change none of these fields.

4.2.2 Top Level Menus

The following top-level menu choices can be accessed using the Menu key:

User Manual Lx / Ls Series

Lx/Ls Series

Menu Structure

LEVEL 1

LEVEL 2

LEVEL 1

LEVEL 2

PROGRAM

VOLT 120.0V

REGISTERS

SAVE REG #

CONTROL

FREQ 400.0HZ

CONFIGURATION

RECALL REG #

VRANGE 150.0V

ADDRESS 01

PHASE 0.0°

BAUD RATE 38400

FUNC >SINE

PON REG RST

CLIP LEV 0

CONTROL MASTER

CURR 24.34A

LANGUAGE SCPI

OL MODE CV

SENSE INT

SYNC INT

OUTP CAL

VIEW ANGLE -5

MEAS CAL

CAL PWORD 100

CLOCK INT

MODE STAN

VOLT F/S 450

PHASE OFST 1.0

ALC STATE ON

VOLT REF INT

MVOLT F/S 11OO

MCURR F/S 1200

IMP STATE OFF

LEVEL 200m

APPLICATIONS

MIL704 ON

NO OUTP THREE

OPTIONS

DO160 ON

ST PHASE RAND

MS704

MEASUREMENT

100.00V 2.349A

LANGUAGE ON

TRANSIENT

400.0HZ 234.9W

ADVANCE ON

238.7VA 1.00Cf

MODE ON

2.349Ap 0.98Pf

CLOCK/LOC N/A

0.18%A 10.559A

ETIME/TEMP

ETIME 21:20:03

0.19%V 120.0°

LIMITS

TEMP 25:33°C

TRAN ST IDLE

LIM LVOLT 150.0V

COUNT 10

HVOLT 300.0V

TRIG SOURCE IMM

LIM LFREQ 45.00HZ

TRAN STEP AUTO

HFREQ 1200HZ

4.2.3 Menu Tree

User Manual Lx / Ls Series

VOLT #12 120.0

CURR 10.00A

VSLEW #12 1e+06

PHASE(C) 120.0

FREQ #12 400.0

Power on Screens

FSLEW #12 10.00

CAL. INST.

CIC674-1,Rev X.X

FUNC #12 0

PAUSE#12 0.0

MODEL 4500LX

SERIAL #12345

CURR #12 20.0

PHASE#12 0.0

Self test passed

DWELL #12 10.00

TTLT #12 ON

ENTRY

DESCRIPTION

VOLTAGE

Programs the output voltage in Vrms. The voltage can be changed from 0 to its max range value as determined by the configuration settings and the selected voltage range using the Voltage shuttle.

FREQ

Programs the output frequency The frequency can be changed from its min to its max value as determined by the configuration settings using the Frequency shuttle.

VRANGE

Selects 150V or 300V voltage range (if available). The actual range values may be different depending on the configuration. The value of this field can be changed with either Voltage or Frequency shuttle as long as the active pointer () points to the VRANGE entry. If only one voltage range is available, this field

Table 4-1: Menu Tree

4.2.4 PROGRAM Menu

The PROGRAM menu is shown in Figure 4-4. It can be reached in one of two ways:

1. by selecting the Menu key, selecting the PROGRAM entry and pressing the Enter key.

2. by pressing the Set key. The PROGRAM menu is used to change primary output parameters. Less frequently used

parameters are located in the CONTROL menu. The following choices are available in the PROGRAM menus:

Figure 4-4: PROGRAM Menu

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

cannot be changed.

PHASE

Selects the phase angle between the external clock and the output of the AC source. If the clock source is internal, this parameter has no effect.

FUNC

Selects the waveform for the selected phase. Available choices are SINE, SQUARE and CLIPPED or any user defined waveform that was downloaded to the AC source waveform memory using the IEEE-488 or RS232C interface.

CLIP LEVEL

Sets the clip level for the CLIPPED sine wave in percent VTHD. The range is 0 to 20 %.

CURR

Sets the current limit value for the current detection system. When the load current value exceeds the set current limit, a fault condition is generated. The actual response of the AC Source to a current limit fault is determined by the protection mode selected in the OL MODE field. (CC = Constant Current, CV = Constant Voltage).

OL MODE

Sets the current limit over load mode. The actual response of the AC Source to a current limit fault is determined by this setting. Available settings are CC for Constant Current mode or CV for Constant Voltage mode. In CV mode, the AC source output will trip off and stay off until re-engaged. In CC mode, the voltage will be reduced to maintain the set current level.

ENTRY

DESCRIPTION

SENSE

Selects internal or external remote sense mode. If INT is selected, the voltage is sensed at the output terminal block. If EXT is selected, the voltage is sensed at the external sense connector. If external sense is selected, care must be taken to connect the external sense lines at the load. For sense leads longer than 1 meter, twisted pairs

4.2.5 CONTROL Menus

The CONTROL menu is shown in Figure 4-5 and can be reached by selecting the Menu key, selecting the CONTROL entry using the DOWN cursor key and then pressing the Enter key.

The CONTROL menu is used to change secondary output parameters. The following choices are available in the CONTROL menus:

Figure 4-5: CONTROL Menus

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

should be used.

SYNC

Selects the external sync mode if available. Default is internal sync, which means a free running time base. The timebase can be synchronized to either the AC line frequency (-LNS option) or an external sync signal (-EXS option) depending on the installed option.

CLOCK

Selects internal or external clock source. The Lx/Ls Series controller uses an open-air crystal time base with an accuracy of 100 ppm. The external clock mode is used to support the –LKS option. For use as an auxiliary unit in a clock and lock system, this field must be set to EXT. A unit with –LKS option can be used stand-alone if needed by setting the INT clock mode.

INT

Default, internal clock.

EXT

Auxiliary unit (-LKS) driven by master (-LKM) clock input. Note: When selecting EXT mode, make sure the Clock and Lock BNC cables are connected to the Master (-LKM) unit. If not, there will be no output on the –LKS unit. See section 3.9 for connection information.

MODE

Power on clock mode. The following two modes can be selected.

STAND

Power up in INT (internal) clock mode for standalone operation. This is the only mode for Lx/Ls unit without the –LKS option. For units with the –LKM option installed, this field is fixed to CLK/LOCK. For units with the –LKS option installed, this field can be changed to CLK/LOCK for use as an auxiliary unit in a clock and lock system or to STAND for use as a stand alone unit.

CLK/LOCK

Fixed on master (-LKM) unit configuration in a clock and lock system. Power up with EXT (external) clock mode on unit with –LKS option. (See OPTION menu section.). Note that this field cannot be changed if the –LKM option is installed. The frequency resolution below 81.9 Hz in MAST clock and lock mode is reduced to 0.1 Hz from the normal 0.01 Hz. If the –HF option is installed, frequency resolution on the –LKM unit is fixed at 1 Hz.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

ALC STATE

Sets the Auto Level Control (ALC) mode. This mode uses the internal measurement system to zero regulate the output. There are three modes of operation:

OFF No measurement based output regulation. REG Output regulation is enabled. AC source will continuously

regulate output but will not trip off output. (Note: This mode

requires firmware revision 0.98 or higher).

ON Output regulation is enabled and output will fault (trip off)

with Error 801 “Output Voltage fault” if regulation cannot be

maintained and the programmed output voltage is 10Vrms or higher. No error is generated for settings below 10 volt.

In most situations, the ALC mode should be set to REG or ON for optimal performance.

Note: The ALC mode only functions for programmed output voltages above 5 Vrms.

VOLT REF

Selects internal or external voltage programming. Select INT for programming of voltage from the front panel or over the bus. Select EXT to use the RPV (remote programming voltage). The RPV input expects a 0-10 Vdc signal for 0 to full-scale voltage.

IMP STATE

Sets output impedance mode. Available settings are:

OFF

The output impedance is at its minimum possible value and the source zero-regulates.

The output impedance is maintained at the set level by reducing the output voltage as a function of the load current as needed.

LEVEL

This field is only valid is the IMP STATE is set to ON. It sets the desired output impedance level. The available range is a function of the voltage and current ranges of the AC source.

NO OUTP

Selects SINGLE or THREE phase mode of operation. In SINGLE phase mode, all current is delivered to the ø1 and COM terminals of the OUTPUT terminal block.

Note that even in SINGLE phase mode, a voltage is present at ø2 and ø3 terminals. Connect only a single phase load when operating in single phase mode.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

ST PHASE

Selects the start phase angle for output changes made to either voltage or frequency. This allows changing the output at a specific phase angle. The Output on/off key also uses this phase angle setting to program the output voltage up to the set level after the output relay is closed. The default value for this field is RAND. To set the start phase angle, set the cursor to the ST PHASE field and use either shuttle knob to adjust between ± 360°. To set to RAND, use the BACK key.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

MEASUREMENTS 1

VOLTAGE

This value is the true rms output voltage measured at the voltage sense lines.

CURRENT

This value is the true rms output current drawn by the load.

FREQ

The output frequency is measured at the sense lines.

For Lx/Ls units with –LKS option, see note below.

POWER

This value is the real power.

MEASUREMENTS 2

VA POWER

This value is the apparent power.

VAR POWER

This value is the reactive power.

POWER FACTOR

This readout shows the power factor of the load.

CREST FACTOR

This readout displays the ratio between peak current and rms current.

MEASUREMENTS 3

VOLT THD

This readout displays the total voltage distortion for the selected phase. The distortion calculation is based on the H2 through H50 with the RMS voltage in the denominator. Note that some definitions

4.2.6 MEASUREMENTS Screens

The Lx/Ls Series uses a DSP based data acquisition system to provide extensive information regarding the output of the Source. This data acquisition system digitizes the voltage and current waveforms and calculates several parameters from this digitized data. The results of these calculations are displayed in a series of measurement data screens. A total of three measurement screens are used to display all this information.

Figure 4-6: MEASUREMENT Screen

The three Measurement screens available on the Lx Series are not menus in that no changes can be made anywhere. Instead, these three screens provide load parameter readouts. The measurement screens can be reached by successively pressing the Meas key, which will toggle to all available screens. For Ls Series, only the first two screens are available unless the –ADV option is installed.

In three-phase mode, measurements are available for each phase individually. To select the desired phase, use the PHASE key to toggle through phase A, B, C, or ABC. The ABC mode displays the data for phase A only.

The following parameters are available in the measurement screens:

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

of THD use the fundamental component (H1) of the voltage as the denominator. Lx/Ls units with firmware revision 0.88 or higher can be programmed to use the fundamental component as the denominator. This mode can only be programmed over the bus by sending the

“MEAS:THD:MODE FUND” command. At power up or after a reset

command, the mode will revert back to RMS.

CURR THD

This readout displays the total current distortion for the selected phase. The distortion calculation is based on the H2 through H50 with the RMS current in the denominator. Note that some definitions of THD use the fundamental component (H1) of the current as the denominator. Lx/Ls units with firmware revision 0.88 or higher can be programmed to use the fundamental component as the denominator. This mode can only be programmed over the bus by sending the

“MEAS:THD:MODE FUND” command. At power up or after a reset

command, the mode will revert back to RMS.

PEAK CURR

This readout reflects the peak current value detected at the output. To measure inrush current for a unit under test, open the output relay and reset the peak current value using the PEAK CURR RESET entry. Then program the output voltage and frequency and turn on the output relay. The peak current measurement will continuously track the maximum current value detected until reset.

PHASE

Relative voltage phase angle measurement with respect to phase A.

Update Program Functions from Measurement Screen

The Shuttles can be used to update voltage and frequency settings from the measurement screen. While the measurement screens is visible, the Voltage and Frequency shuttle continue to operate.

Frequency measurements on –LKS units

Lx or Ls models configured with the –LKS option used in a clock and lock configuration will not accurately measure frequency if the programmed frequency of the master unit (-LKM) exceeds 2000 Hz unless the frequency setting of the –LKS is set to the a value close to the programmed frequency of the –LKM master unit. Setting the –LKS programmed frequency when it is operating as a clock and lock auxiliary does not affect its actual output frequency as it is controlled by the –LKM master unit. It does provide the controller with the required information to accurately measure the frequency.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

TRAN ST

Indicates the status of the transient system. Available modes of operation are:

IDLE

Transient system is in IDLE or inactive state. To start a transient list, press the ENTER key while on the TRAN STATE field. Note that the output must be ON to run a transient program or an error message will be displayed.

WTRIG

Transient system is armed and waiting for a trigger event.

BUSY

Transient system is active. A transient list execution is in progress.

COUNT

Sets the execution count for the transient system. A count of 1 indicates the transient will run 1 times. The count value can be set with either voltage or current knob while the cursor is on this field. The count range is from 1 through 2E+08. Values below 200,000 are displayed in fixed point notation. Value higher than 200,000 are displayed as a floating point number (2E+05). The display has insufficient characters to display the entire mantissa so entering values above 2E+05 from the keyboard is not recommended.

TRIG SOURCE

Indicates the trigger source for transient system. Available trigger sources are:

IMM

Immediate mode. The transient is started from

4.2.7 TRANSIENT Menu

The transient menu is used to program and execute user-defined output sequences. These output sequences are defined as a sequential list of voltage and/or current settings that can be executed in a time controlled manner.

Each step in these lists is assigned a sequence number ranging from #0 through #99. The numbering determines the order in which each step is executed.

Each step can control the voltage setting, voltage slew rate, frequency setting, frequency slew rate and dwell time. The dwell time determines how long the output dwells at the current step before progressing to the next step. Dwell times can range from 1 msec up to 900000 secs.

Transient lists can be set up from the front panel or over the bus. The transient list can be saved with the rest of the front panel settings in one of the setup registers. (See Register Menu).

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

the front panel using the ENTER key.

BUS

Bus mode. The transient system is started by a bus command or a group execute trigger (GET).

EXT

External mode. The transient system is started by a user-provided external TTL trigger signal on TRIGGER IN1.

TRAN STEP

Indicates the transient system execution mode. Available modes are:

AUTO

When triggered, the transient system will automatically execute each list point sequentially without waiting for a trigger between list points. This execution is paced by the dwell time set for each data point.

ONCE

When triggered, the transient system will execute the first list point and wait for a new trigger once the dwell time expires. This allows triggered execution of each step in the transient list.

List parameters:

VOLT

Step #

Voltage set point

VSLEW

Step #

Voltage slew rate in V/sec

FREQ

Step #

Frequency set point

FSLEW

Step #

Frequency slew rate in Hz/sec

FUNC

Step #

Waveform selection. Available choices are Sine, Square, Clipped or any of the user provided waveforms in waveform memory.

PAUSE

Step #

Delay

CURR

Step #

Current set point

PHASE

Step #

Phase angle set point. (Not relevant for phase A if clock mode is internal.)

DWELL

Step #

Dwell time in seconds. Range is 0.001 to 900000

TTLT

Step #

ON: Generates an output trigger pulse at this list step. OFF: No output trigger. The output trigger is available on the TRIG

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

OUT1 SMC connector on the rear panel.

Transient List points data entry method.

Transient list points are numbered sequentially from 0 through 99 and executed in this order. Each list point or list entry has 6 parameters as shown in the table above. To enter list point data, the right hand knob (Frequency) is used to increment or decrement the parameter value. The left-hand knob (Voltage) is used to increment or decrement the list point sequence number (#). The sequence number can only be increased to the next available empty (new) list point.

To move to the next or previous parameter, use the UP () or DOWN () cursor keys The voltage and frequency slew parameters can be set to their maximum slew rates by turning

the Frequency knob counter clock-wise past 0. This will cause the slew parameter to 'wrap around' to its maximum available value.

It is not necessary to use all list points, only as many needed to accomplish the desired output sequence.

Setting Data Values

Data values can be set for each point in a list. If all data values in a specific list are going to be the same value (e.g. the current limit parameter is set to the same value for the entire transient program), only the first data value for that parameter has to be set. Setting only the first data point will automatically repeat that value for all subsequent points in the transient list.

Setting Slew Rates

Very often, output changes must be done as fast as the power source can make them. This means the transient list slew rate is set to its maximum value. If this is the case for all the data points in the list, it is sufficient to set just the first data point's slew rate for either voltage and/or current. Setting only the first point of any parameter in the list will automatically cause all points for that parameter to be set to the same value. This saves a lot of data entry time.

If however, one or more data points require a specific slew rate such as needed to do a ramp, all other points have to be specifically set to their required slew rates, including the maximum slew rate.

Saving Transient Lists

Once completed, a transient sequence can be saved along with the steady state setup of the instrument by using the REGISTER, SAVE menu. Registers that may be used for this purpose are 1 through 15. It is advisable to do so, especially for longer transient lists.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

SAVE

REG 0 – 7

Saves the selected setup and transient list from memory. (Setup only for Reg 0) The left knob (Voltage) may be used to scroll through the available list of setup register numbers. Use the ENTER key to perform the save operation. Register 0 can be assigned as the power-on state setup from the CONFIGURATION menu. A valid setup must be saved in REG0 to do so.

Note that REG0 only saves the setup, not the transient list. All other registers also save the transient list.

RECALL

REG 0 – 7

Recalls the selected setup and transient list to memory. (Setup only for Reg 0) The left knob (Voltage) may be used to scroll through the available list of setup register numbers. Use the ENTER key to perform the recall operation. Register 0 can be assigned as the power-on state setup from the CONFIGURATION menu. A valid setup must be saved in REG0 to do so.

Note that REG0 only saves the setup, not the transient list. All other registers also save the transient list.

4.2.8 REGISTERS Menu

The registers menu provides access to the non-voltage setup storage of the power source. A total of 8 front panel setups can be stored in registers numbered from 0 through 7. Each register except register 0 can hold the complete front panel setup, including the programmed transient list. This allows for quick recall of different setups and transient programs.

Register 0 is reserved to be used as the power-on setting as assigned by the user. To have the power source start in a specific setting, save the desired setting to Register 0 and assign register zero as the power-on default in the CONFIGURATION menu. Alternatively, the Lx/Ls can be set to power up with the RST factory default settings. See 4.9 for factory default settings.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

ADDRESS

0 - 31

Sets the selected IEEE / GPIB bus address for the optional IEEE/GPIB interface. Factory default is address 1. The left knob (Voltage) can be used to scroll through the 0 through 31 address range. Do not use address 0 as this address is typically reserved for the GPIB controller.

BAUD RATE

9600 19200 38400 57600 115200

Sets the baud rate for the RS232C serial communications port. Factory default is 38400 baud. Available settings are 9600 through 115200 baud. Either shuttle knob can be used to scroll through these selections.

POWER ON

REG0 RST

Selects either non-volatile REG0 to be recalled automatically at power-on or factory default (RST). Factory default is RST, which recalls the factory settings.

Note that to use REG0 for power-on default, the contents of the register must be programmed first. See section 4.2.8. If an empty register is selected, the power source will revert back to RST (factory setting).

CONTROL

MASTER AUX

This is an information-only field that displays the controller operation mode. For a single stand-alone Lx/Ls unit, the mode is always MASTER. Alternatively, the auxiliary mode may be detected if the system interface cable at the rear panel is plugged in and connected to another Lx/Ls unit. In AUX mode, the AC source is controlled by another unit (Master unit). The controller will be disabled and has no control over the amplifiers, the measurements or any other function. A

4.2.9 CONFIGURATION Menu

The configuration menu may be used to configure various aspects of the instrument such as the serial port, IEEE-488/GPIB address and the power-on settings of the supply.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

message will be displayed at power indicating it is in Auxiliary mode. You can press any key to get in the menus but no control is possible.

LANGUAGE

SCPI Reserved

The standard bus syntax used by the Lx/Ls Series is the Standard Commands for Programmable Instruments (SCPI). If an alternative syntax such as APE (Abbreviated Plain English) is available, it can be selected from this menu. The APE language is part of the Ls Series –GPIB option.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

VIEW ANGLE

-10 to +10

LCD viewing angle adjustment.

CAL PWORD

V range

Calibration password required to access all calibration screens. The calibration password is the high voltage range value. [300 ] The password can be entered using the Voltage shuttle followed by the ENTER key.

Measurement Calibration Screens

MVOLT F/S

± 9999

Calibration coefficient for full-scale voltage measurement.

MCURR F/S

± 9999

Calibration coefficient for full-scale current measurement.

Output Calibration Screens

VOLT F/S

± 9999

Calibration coefficient for full-scale voltage output. (calibrated by measurement)

CURR F/S

± 9999

Calibration coefficient for full-scale current ouptut. (calibrated by measurement)

4.2.10 CALIBRATION Menus

The measurement calibration menu can be used to perform routine calibration of the internal measurement system. The recommended calibration interval is 12 months. To enter the calibration screens, the calibration password must be entered first.

Note: Refer to chapter 6 for details on routine calibration procedures and equipment requirements. Do not attempt calibration without consulting the user manual.

This menu also contains the LCD viewing angle adjustment.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

LANGUAGE

N/A

Standard SCPI command language.

Ls Model may be equipped with the APE (Abbreviated Plain English) language option for backward compatibility with California Instrument’s L Series AC power source. If APE is installed, the language mode can be selected over the bus or from the CONFIGURATION screen. (see section

4.2.11 APPLICATIONS Menu

The Applications menu provides access to application specific firmware functions if available. Note that there may be no applications installed in which case this screen will still be shown but has no function.

Possible applications are DO160 and MIL704. To access either of the application screens, position the cursor on the APPLICATIONS entry and press the ENTER key. Select the desired application and press ENTER. For information on using these applications, see sections 8 and

4.2.12 OPTIONS Menu

The Options menu provides access to available optional features. Note that there may be no options installed in which case this screen will still be shown but has no function. The option setting are protected and cannot be changed by the user. These screens are provided for information purposes only.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

4.2.9).

ADVANCE

Standard on all Lx Series models.

N/A

This feature is optional on Ls Series models. If installed, this field will display ON. If not, N/A is shown instead.

MODE

Standard on all Lx Series models. Allows the output to be switched between single and three phase modes of operation.

N/A

This feature is optional on Ls Series models. If installed, this field will display ON. If not, N/A is shown instead.

CLOCK/LOC

N/A

Clock and lock is an option. If no –LKM option is installed, this field will show N/A.

MAST

-LKM Option installed. The unit can be used as a Clock and Lock system master or stand alone.

AUX

-LKS option installed. The unit can be used as a Clock and Lock system auxiliary or stand alone.

ENTRY

DESCRIPTION

ETIME

01:23:45

The ETIME field displays the total accumulated elapsed time for the instrument since it's initial manufacture. This value cannot be changed or reset.

TEMP

37.342°

The TEMP field is not a user selectable parameter but rather a read-out of the internal temperature in degrees Celsius. It is provided for informational purposes only.

4.2.13 Elapsed Time and Temperature Screen

The Etime/Temp screen displays the elapsed time since the power source has first been turned on. This is an accumulated total time in hours, minutes and seconds.

The same screen also displays the internal temperature of the power supply.

User Manual Lx / Ls Series

ENTRY

DESCRIPTION

LIM LVOLT

Low Voltage Range

Displays maximum available output voltage in the low voltage range.

HVOLT

High Voltage Range

Displays maximum available output voltage in the high voltage range.

LIM LFREQ

Low Frequency Limit

Displays minimum available output frequency.

HFREQ

High Frequency Limit

Displays maximum available output frequency

CURR

C range

Displays maximum available current in low voltage range and single phase mode. If only 2 or 3 phase mode is available, this value is the maximum available current per phase.

PHASE (C)

Phase Setting

Displays phase angle for phase C. Valid values are 120 for three phase or mode configuration, 0 for single phase only configuration. Any other value indicates split (2) phase configuration.

4.2.14 LIMIT Menu

The Limit menu displays the maximum available value for voltage, frequency and current range of the power supply. This screen is used for information only and contains no user changeable fields. The limit values shown cannot be changed.

User Manual Lx / Ls Series

4.3 Output Programming

4.3.1 Set the Output

Output parameters are all set from the PROGRAM screen.

1. Use the MENU key and select the PROGRAM entry.

2. Press the ENTER key to bring up the PROGRAM menu.

2. Use the PROG key to directly bring up the PROGRAM menu.

There are two methods for programming output parameters: IMMEDIATE mode SET mode

4.3.2 Slewing Output Values with the Knob in IMMEDIATE Mode

The default mode of operation is an immediate mode in which changes to output parameters made with the knob or the entry keypad are immediately reflected at the output.

To change the output voltage:

1. Place the cursor on the VOLT entry

2. Rotate the Voltage knob clockwise to increase the value, counterclockwise to decrease the value

These changes take effect immediately. To change the output frequency:

1. Place the cursor on the FREQ entry

2. Rotate the Frequency knob clockwise to increase the value, counterclockwise to decrease the value

These changes take effect immediately.

User Manual Lx / Ls Series

4.3.3 Change Output Values with the Knob in SET Mode

The SET mode of operation is a mode in which changes to output parameters made with the knob or the entry keypad do not affect the output until the Enter key is pressed. The AC source is put in this SET mode by pressing the Set key twice.

To change the output voltage:

1. Press the Set key twice

2. Place the cursor on the VOLT entry

3. Rotate the Voltage knob clockwise to increase the value, counterclockwise to decrease the value

4. A blinking underline cursor will appear in the data for the VOLT field to indicate a change in settings but the output remains unchanged.

5. Place the cursor on the FREQ entry

6. Rotate the Frequency knob clockwise to increase the value, counterclockwise to decrease the value

7. A blinking underline cursor will appear in the data for the FREQ field to indicate a change in settings but the output remains unchanged.

8. Press the Enter key.

Both new voltage and frequency output values are now present at the output. The unit has returned to immediate mode of operation until the Set key is pressed again.

Note that output settings such as voltage and frequency can be changed from the measurement screen as well. If all three phases are selected, slewing the Voltage knob will change the output voltage on all three phases. If only one phase is selected, only the output of the selected phase will be affected.

User Manual Lx / Ls Series

4.4 Waveform Management

The Lx Series employs independent arbitrary waveform generators for each phase. This allows the user to create custom waveforms. In addition, three standard waveforms are always available. This chapter covers issues that relate to defining, downloading and managing custom waveforms.

Ls Series model only support arbitrary waveform generation if the –ADV option is installed. If not, you can skip forward to section 4.5 as the next sections do not apply.

4.4.1 Standard Waveforms

For most AC applications, a sine wave shape is used. The sine wave is one of the standard waveforms provided on all Lx Series models. This standard sine wave is always available and is the default waveform at power-on. Two more standard waveforms are available, square and clipped.

Figure 4-7: Selecting a Waveform

The square wave provides a high frequency content waveform with relative fast rise and fall times. Due to AC amplifier bandwidth limitations, the frequency content of the standard square

wave has been kept within the amplifier’s capabilities. As the fundamental frequency is

increased, the relative contribution of higher harmonics is reduced. The clipped sine wave may be used to simulate voltage distortion levels to the unit under test.

The total harmonic distortion level may be programmed in percent using the CLIP LEV field directly below the FUNC entry.

Note that changing the distortion level of the clipped waveform forces the AC source to regenerate the clipped sine wave’s data points and reload the waveform register with the newly requested data. This process requires the output to be dropped briefly. To avoid interrupting the voltage output to the unit under test, set the clip level needed before closing the output relay and do not change it while the EUT is under power. You can then toggle between the clipped sine wave and any other waveform in memory without interrupting the output.

4.4.2 Phase Selection

Figure 4-8: Selecting Waveforms for Single Phase or All Phases

Different waveforms may be selected for each phase. The number of custom waveforms from which to select remains 50 but each phase can be assigned a different custom or standard waveform. The specific output phase for which the wave shape is programmed is selected with the Phase key on the front panel. To select the same wave shape for all three phases in a three-

User Manual Lx / Ls Series

phase configuration, press the Phase key until all phase enunciators (øA, øB and øC) are lit. Waveform selections made in this mode will apply to all three phases.

4.4.3 Creating Custom Waveforms

The Lx controller supports up to 50 user defined waveforms in addition to the 3 standard waveforms. Custom waveforms cannot be created from the front panel of the Lx Series. Rather, they have to be downloaded through the IEEE-488 or RS232C interface.

Each waveform is defined by 1024 data points. Each data point can range between –1 and +1 (floating point number). See Lx Series programming Manual (P/N 7004-961) for details on downloading waveforms.

Once downloaded, waveforms remain in non-volatile memory and will be visible in the WAVEFORMS menu for selection. The user can assign a 12-character name to each custom waveform. Avoid using any of the standard waveform names (SINE, SQUARE or CLIPPED) as these names will not be accepted.

Waveforms may be deleted using the IEEE-488 or RS232C interface as well. Custom waveforms cannot be deleted from the front panel however to avoid accidental erasure.

4.4.4 RMS Amplitude Restrictions

The output of a sine wave may be programmed to the full rms value of the voltage range selected. If the AC source is in the 300 V range, the maximum programmable rms voltage is 300 Volt. If a custom waveform is used however, the maximum programmable rms voltage may be less than the maximum range value. The voltage range limit is based on the use of a sine wave with a 1.414 crest factor. A 300 V rms sine wave has a 424 Volt peak voltage. The AC source has a maximum peak voltage capability that is determined by the selected voltage range. If the user selects a custom waveform with a crest factor that is higher than 1.414, the peak voltage would exceed this maximum if the rms voltage were to be programmed at 300 V rms.

The Lx Series power source automatically limits the maximum allowable programmed rms voltage of a any custom waveform by calculating the crest factor of the selected waveform and controlling the rms limit accordingly. Thus, each custom waveform may have a different maximum rms value. The controller will prevent the user from programming the rms voltage above this limit. If a value is entered in the PROGRAM menu above this value, a “Voltage peak error” message is generated.

Figure 4-9: Waveform Crest Factor Affects Max. rms Voltage

The figure shown here illustrates the relationship between the crest factor of the wave shape (or

its “peakiness”) and the maximum peak voltage allowed for a given voltage range. Since the peak voltage cannot exceed the AC source’s capabilities, the programmable rms voltage has to

be restricted, in this case to only 167.8785 volt for the waveform on the left. The sine wave on the

User Manual Lx / Ls Series

right can be programmed to the full 300 V rms as this still falls within the same peak voltage limitation of the AC source.

If the Lx Series is used over the bus, the “:VOLT? MAX” query command can be used to

determine the maximum allowable RMS voltage for the selected waveform. Using the returned value as part of a program will prevent range errors.

4.4.5 Frequency Response Restrictions

The user may create a waveform that contains any number of harmonic frequencies of the fundamental. The AC Source itself however has a finite signal bandwidth and will attenuate higher frequency components of the signal. To limit the maximum frequency component of the output signal, the controller automatically applies a band-pass filter to all custom waveforms as they are downloaded. The controller implements the following process for user-defined waveforms:

Each down loaded waveform will have a computed frequency limit that is less than or equal the maximum frequency limit of the AC source. The frequency limit is a function of the harmonics content of the waveform and will follow the equation below.

Fmaxh = Fmax/(level * hn)

If Fmaxh is below the minimum frequency limit, the waveform will be rejected at down load time and the label will be deleted from the waveform catalogue.

If the Lx Series is used over the bus, the “:FREQ? MAX” query command can be used to

determine the maximum allowable fundamental frequency for the selected waveform. Using the returned value as part of a program will prevent range errors.

Limits assume a program of full-scale voltage. No adjustments for voltage setting are made below the full-scale value.

Waveform selection and frequency programming will be subject to the above limit. An error message will be generated to reflect this type of error:

"22,Waveform harmonics limit"

Transient editing will also generate the above error during keyboard entry. Remote transient entry will not check for the error until transient execution.

4.4.6 Switching Waveforms

Waveforms can be switched as part of the transient system. Each transient type setup menu has a FUNC field. This field allows selection of any of the standard or custom waveforms available in waveform memory. Refer to the section on transients for more details on using transient list to switch output waveforms.

User Manual Lx / Ls Series

Parameter

MEASUREMENTS 1

VOLTAGE

AC rms voltage

CURRENT

AC rms current

FREQUENCY

Frequency

POWER

Real power

MEASUREMENTS 2

VA POWER

Apparent power

VAR POWER

Reactive power

POWER FACT

Power factor

CREST FACT

Crest factor

MEASUREMENTS 3

VOLT THD

Voltage distortion

CURR THD

Current distortion

PEAK CURR

Highest AC current found

PHASE

Phase angle (relative to phase A (ø1)

4.5 Measurements

Standard measurements are always available through the Meas key on the front panel. These measurements are spread across multiple screens to enhance readability. Switching between these screens can be done by successively pressing the Meas button on the front panel. This will cause the screen to cycle through all available measurement screens.

4.5.1 Basic Measurements

The following three measurement screens are available:

Note: The V and I distortion calculations are based on H2 through H50 with the fundamental component (H1) in the denominator.

Measurements are always running in the background. When the user selects a measurement screen for display, the AC source first updates all the measurement parameters before displaying the requested screen. Consequently, pressing the MEAS key may not always bring up the selected screen immediately. There will be a perceptible delay. This will prevent the screen from appearing with invalid or blank readouts.

Note that all measurements are AC coupled only so any DC offset will not be reported.

4.5.2 Accuracy Considerations

Any measurement system has a finite accuracy specification. Measurement specifications are listed in Section 2. When using the AC source for measurement purposes, always consider these specifications when interpreting results. Measurement inaccuracies become more pronounced as the signal being measured is at the low end of the measurement range. This is particularly relevant for low current measurements. The Lx/Ls Series is a high power AC source optimized for providing and measuring high load currents. When powering low power loads, measurement inaccuracies on rms and peak current measurements will greatly affect derived measurements such as power, power factor and crest factor.

The measurement system on the Lx Series uses a digital data acquisition system with a 96 Ks/sec sampling rate and 16 KHz bandwidth. This means that higher frequency components of the measured signal are filtered out. Any contribution to the rms value of voltage and current

User Manual Lx / Ls Series

above this cutoff frequency will not be reflected in the Lx Series measurements. When using an external measurement reference, this may account for discrepancies in readings.

4.6 Harmonic Analysis

The Lx Series controller offers advanced power analyzer measurement capabilities. These functions may be accessed from the Meas screen. The phase for which the analysis or waveform acquisition is done may be selected using the Phase key when in three-phase mode.

The controller’s power analyzer performs fast Fourier transformation (FFT) on both voltage and current on each available phase. The resulting frequency spectrum can be obtained over the bus only.

The Ls Series provides this capability only if the –ADV option is present.

4.7 Transient Programming

4.7.1 Introduction

Transient programming provides a precise timing control over output voltage and frequency changes. This mode of operation can be used to test a product for susceptibility to common AC line conditions such as surges, sags, brownouts and spikes. By combining transient programming with custom waveforms, virtually any AC condition can be simulated on the output of the AC source.

The default voltage mode is FIXED which means the output voltage is constant and remains at the level set by the user. Changes made to the output voltage made from the PROGRAM menu take effect immediately. In front panel operation mode, the voltage and frequency slew rates (rate of change) are always at their maximum of 2E5 V/s and 2E5 Hz/s. Slew rate programming is only possible over the IEEE-488 or RS232C bus. On power up, the AC source always reverts to the maximum slew rate for both voltage and frequency.

4.7.2 Using Transient Modes

The voltage can be programmed in the following transient operating modes:

STEP Causes the output to permanently change to its triggered value. PULSE Causes the output to change to its triggered value for a specific time, as

determined by the Pulse menu parameters.

LIST Causes the output to sequence through a number of values, as determined by

points entered in the List menu.

FIXED Disables transient operation for the selected function.

4.7.3 Step Transients

Step transients let you specify an alternate or triggered voltage level that the AC source will apply to the output when it receives a trigger. Because the default transient voltage level is zero volts, you must first enter a triggered voltage before you can trigger the AC source to change the output amplitude. Step transients can only be programmed through the bus, not the front panel. Refer to the SCPI Programming Manual for more information about programming Step transients and triggers.

User Manual Lx / Ls Series

4.7.4 Pulse Transients

Pulse transients let you program the output to a specified value for a predetermined amount of time. At the end of the Pulse transient, the output voltage returns to its previous value. Parameters required to set up a Pulse transient include the pulse count, pulse period, and pulse duty cycle. An example of a Pulse transient is shown in Figure 4-10. In this case, the count is 4, the pulse period is 16.6 ms or 60 Hz and the duty cycle is 33%.

Figure 4-10: Pulse Transients

Note that Pulse transients can only be programmed over the bus, not the front panel. Refer to the SCPI Programming Manual for more information about programming Pulse transients and triggers.

4.7.5 List Transients

List transients provide the most versatile means of controlling the output in a specific manner as they allow a series of parameters to be programmed in a timed sequence. The following figure shows a voltage output generated from a list. The output shown represents three different AC voltage pulses (160 volts for 33 milliseconds, 120 volts for 83 milliseconds, and 80 volts for 150 milliseconds) separated by 67 millisecond, zero volt intervals.

Transient list programming is supported from the front panel and may be accessed by selecting the TRANSIENTS screen. Transient lists can also be programmed over the bus. Refer to the SCPI Programming Manual for more information about programming List transients and triggers over the bus.

Figure 4-11: List Transients

The list specifies the pulses as three voltage points (point 0, 2, and 4), each with its corresponding dwell point. The intervals are three zero-voltage points (point 1, 3, and 5) of equal intervals. The count parameter causes the list to execute twice when started by a single trigger.

User Manual Lx / Ls Series

4.7.6 Programming list transients from the front panel

The output transient system allows sequences of programmed voltage and or frequency changes to be executed in a time controlled manner. Changes can be either step changes (maximum slew rate) or ramps (specified slew rates).

The section provides some examples of programming output changes (transients). Transients are defined as a series of numbered steps in a list. The list is executed sequentially. Each step has a number of fields that can be set by the user:

Voltage, Voltage slew rate, Frequency, Frequency slew rate, Current, Function, Dwell time, Trigger out, Phase.

The voltage, current and frequency settings are the same as one would do form the setup screen using the knobs. At each step, the output will be set to the specified voltage,current and/or frequency. The rate of change for voltage and frequency is determined by the slew rate set. Current slew is fixed at MAX and cannot be programmed.

If the voltage is changed from 10 Vac to 20 Vac and the V slew is set to 100 V/sec, the voltage will ramp from 10 to 20 Vac in 100 msec. ( [20 - 10] / 100 = 0.1 sec). The dwell time is the time the output will remain at this setting. In this example, it should be set long enough to reach the final programmed value of 20 Vac, e.g. it should be at least 0.1 sec. If not, the voltage will never reach the final value of 20 Vac before the next step in the transient list is executed. The dwell time may be set longer than 0.1 sec in this example. If for example the dwell time is set to 1.0 sec, the voltage will ramp from 10 Vac to 20 Vac over a 0.1 sec period and then remain at 20 Vac for 0.9 sec.

Once the dwell time set for a step in the list expires, the next step is entered (if available, if not, execution stops and the output remains at the final values set in the last step of the list.)

Note that while there are parameters for both voltage and frequency level and slew rates, there is only one dwell time, which applies to each step in the transient list.

Front panel entry only supports the LIST mode of operation. For Pulse and Triggered modes, the remote control interface must be used.

When entering transient lists, each list must be entered sequentially starting with step #0. If a list point is not yet set, the step number cannot be increased past it.

The following sample illustrates the use of transient system to program controlled output changes.

User Manual Lx / Ls Series

Step #

(data point)

Volt

VSlew

Frequency

FSlew

Dwell

70.00

MAX

360.0

MAX

0.100

110.00

100.0

440.0

MAX

0.900

130.00

MAX

240.0

800.00

0.250

90.00

53.3

240.0

MAX

0.750

90.00

MAX

460.0

MAX

1.000

110.00

MAX

400.0

MAX

0.800

88.00

MAX

400.0

MAX

0.200

110.00

MAX

400.0

MAX

1.000

Figure 4-12: Sample Transient Output Sequence

This output can be accomplished using the following transient list.

4.7.7 Waveforms Function List

The FUNCTION field available in each transient list event setup menu may be used to dynamically switch waveforms during transient execution. This allows different waveforms to be used during transient execution. Waveforms may be switched without the output of the source being turned off. For three phase configurations, each phase has its own waveform list so different waveforms may be programmed on different phases during transient execution.

Table 4-2: Sample Transient List

Figure 4-13 illustrates the concept of using different waveforms at different steps in a transient list. In this case, the change was programmed to occur at the zero crossing. Any phase angle can be used to start the transient execution however. To keep the phase angle synchronization, the dwell times have to be set to an integer number of periods. Over long periods of time, phase

User Manual Lx / Ls Series

synchronization may get lost due to timing skew between the waveform generator and the transient state machine.

Figure 4-13: Switching Waveforms in a Transient List

4.7.8 Transient Execution

Figure 4-14: TRANSIENT Menu

A transient list can be executed from the TRANSIENT menu. To start a transient list, position the cursor on the TRAN ST field as shown in Figure 4-14 and press the ENTER key. Transients may be aborted by pressing the ENTER key again while on the same field as the field changes to ABORT while a transient execution is in progress. For short duration transients, this will likely not be visible, as the transient will complete before the screen is updated. Longer duration transients however may be aborted in this fashion.

4.7.9 Saving Transient List Programs

When the AC source is turned off, the transient list that was programmed is not automatically retained. Thus, if you turn the unit off, you will loose your programmed transient list. However, transient programs may be saved in nonvolatile memory for later recall. This allows multiple transient list programs to be recalled quickly without the need to enter all parameters each time. Transient lists are stored as part of the overall instrument front panel setup in any of the available setup registers.

To save the transient list you created in the previous example, proceed as follows:

1. Press the Menu key repeatedly until the REGISTERS / CONFIGURATION menu is displayed.

2. Move the cursor to the REGISTERS entry and press the ENTER key.

3. The cursor will default to the SAVE REGISTER # position. Enter a number from 1 through 15 and press the ENTER key. DO NOT USE REGISTER 0 (REG0) as it is reserved for poweron setting recall and does not include a transient list.

4. A message will appear indicating that the front panel settings and the transient list data have been saved in the setup register you selected.

User Manual Lx / Ls Series

Parameter

Factory default setting

Voltage

0.0 Volt

Frequency

50 Hz

Current limit

Maximum available current.

Output state

OFF

Local / Remote State

Local. Front panel unlocked.

4.8 Setting the Power-on Initialization Values

The power source is shipped with default factory settings when the unit is powered up. The factory settings are:

Table 4-3: Factory Default Power on Settings

It is possible to change the power on initialization values in one of two ways:

1. Using the RS232 or IEEE-488 bus interface.

2. Using the front panel. To change the power on initialization values from the front panel, proceed as follows:

1. Set the AC power source output parameters from the front panel as you want to power up the unit.

2. Save this setting to setup register 0 from the REGISTERS menu.

3. Select the CONFIGURATION menu and move to the POWER ON field.

4. Change the POWER ON field to REG0.

5. This will recall the settings contained in register 0 at power up.

User Manual Lx / Ls Series

MODE

OPERATION

LATCHING

A TTL low at the RI input latches the output in the protection shutdown state, which can only be cleared by an OUTPut:PROTection:CLEar command or by manually resetting the output.

LIVE

The output state follows the state of the RI input. A TTL low at the RI input turns the output off; a TTL high turns the output on. This mode is equivalent to using the Output On/Off button on the front panel. Default mode. This mode is active at power up.

OFF

The instrument ignores the RI input.

4.9 Remote Inhibit Function

The remote inhibit input on the rear panel can be used to disable the output of the AC source. This SMC input takes either a low level TTL signal or a contact closure. The mode of operation can be programmed over the remote control interface using the OUTP:RI:MODE command. See 7004-961 programming manual for details.

The following modes are supported.

Table 4-4: Factory Default Power on Settings

The RI output state is saved as part of an instrument setup using the REGISTERS menu. It can be made part of the power on setting if needed. The default state is LIVE.

User Manual Lx / Ls Series

5. Principle of Operation

5.1 Overall Description

Three-phase input power is routed from the back of the cabinet to a fuse holder terminal block located in the bottom front of the unit. AC power is converted to a 300 VDC bus using a switching buck converter. The DC bus is used to power all three DC/AC invertors (amplifiers), one for each phase. The AC input converter also generates the required DC bias supply voltages to power the auxiliary circuits of the power source such as the programmable controller and keyboard display.

The output of each amplifier is fed through an output transformer which steps the output voltage to the required 150 V AC RMS or 300 V AC RMS output range. The output transformers provide the required isolation between input and output and also block any DC at the output of the power source.

The CPU controller / oscillator assembly generates the reference waveforms and provides frequency, amplitude, and current limit control. A current and voltage sense board is located at the top right of the unit above the transformers and is used to sense all output current and voltage for both control and measurement purposes. The current sensor board, in conjunction with the CPU controller, also supports the programmable RMS current limit function.

To obtain higher power levels, two 4500Lx (4500 VA) power sources are paralleled together to form a 9000V VA three-phase AC source. This is accomplished through the system interface, which routes the required analog and digital signals from the 4500Lx master (unit with controller front panel) to the 4500Lx auxiliary.

5.2 Controller Assembly

The Controller Assembly is located on the front panel the Lx/Ls master unit. The controller assembly consists of a single printed circuit board that plugs into the backplane motherboard. The controller contains the main oscillator, which generates the sine wave signal setting the frequency, amplitude and current limit level. It also senses the output voltage to provide closed loop control of the output. The controller also handles all user interface and remote control related tasks. The function of each of the two boards that make up the controller module is described in the following paragraphs.

5.2.1 Programmable Controller

This board assembly, A7, consists of the components for the CPU (DSP), generating all three Phase waveform signals to the power amplifier and all of the program, waveform and data memory. In addition, this board contains the circuits for all measurements. The clock and lock circuit required to support the clock and lock mode of operation of multiple Lx/Ls units is also on this board assembly.

5.2.2 Keyboard / Display Board

The keyboard/display assembly is assembly A9 and is mounted to the front panel. If the Lx/Ls system is used over one of the remote control interfaces, the keyboard functions can be locked out by asserting the REMOTE state. See the Lx/Ls Series Programming Manual (P/N 9003-961) for details.

User Manual Lx / Ls Series

CAUTION

VOLTAGES UP TO 480 VAC AND 500 VDC ARE PRESENT IN

CERTAIN SECTIONS OF THIS

POWER SOURCE. THIS EQUIPMENT GENERATES

POTENTIALLY LETHAL VOLTAGES.

DEATH

ON CONTACT MAY RESULT IF PERSONNEL FAIL TO

OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH

ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.

User Manual Lx / Ls Series

6. Calibration

The Routine Calibration should be performed every 12 months. Non-routine Calibration is only required if a related assembly is replaced or if the periodic calibration is unsuccessful. Calibration of the Lx/Ls system can be performed from the front panel or over the bus. This section covers calibration from the front panel.

6.1 Recommended Calibration Equipment

Digital Multimeter: Fluke 8506A or equivalent / better. HP 34401A or equivalent / better

100 mOhm Current Shunt: Isotek Model RUG-Z-R100-0.1.calibrated to 0.25% - OR 10 mOhm Current Shunt: Isotek Model RUG-Z-R010-0.1.calibrated to 0.25%

(For single phase mode or multi-chassis Lx/Ls configurations, a 10 mOhm shunt may be needed .

Load Bank: Various high power load resistors or a resistive load bank will be

needed. (E.g. Avtron) Size of the load bank depends on model and phase mode. A load is required to perform the current measurement calibration near full scale. Current measurement calibration should be done on the lowest available voltage range. The accuracy and value of the load resistor is not critical as long as the current drawn is sufficient to operate the AC Source in the upper current range (80-100 %). Suggested values of load bank settings are shown in Table 6-1 and Table 6-2.

Phase Meter Krohn-Hite Model 6620 or equivalent phase meter (0.01°

resolution, 0.02° accuracy).

6.2 Calibration Screens

The calibration screens for output or measurement calibration can be selected from the MENU screen. (Press MENU button several times to toggle to select the CALIBRATION screen.)

To select the CALIBRATION screen press the or key several times to select PASSWORD. Then press the ENTER key. This will bring up the PASSWORD screen. To prevent unauthorized access to calibration data, a password must be entered to access any calibration screen. The calibration password is an numeric value equal to the high voltage range limit, ty pically 300 on a Lx Series and 270 on a Ls Series. Units with a –HV or –EHV output range option may have a different high voltage range value and corresponding calibration password. Check the serial tag label or the LIMIT screen when in doubt.

The password can be entered using the Voltage shuttle to dial in the number. Once the correct value is reached, press the ENTER key. Once set, the calibration screens remain accessible until the Lx unit is powered down. If you leave the calibration screen and return, toggle the value up or down and back, followed by the ENTER key to re-engage the calibration mode.

On Lx systems or Ls systems with three-phase output capability, use the PHASE key on the front panel to select the phase to be calibrated.

To select the MEASUREMENT CALIBRATION screen, follow the same steps as outlined above but select the MEASUREMENT CAL entry instead of OUTPUT CAL. If another CALIBRATION screen has been accessed since power-up, no password is needed. Otherwise, enter the same password as indicated above.

User Manual Lx / Ls Series

PARAMETER

POWER SYSTEM

Model --->

3000Lx

1 Phs

3000Lx

3 Phs

4500Lx

1 Phs

4500Lx

3 Phs

6000Lx

1 Phs

6000Lx

3 Phs

Max current, 120 V, Lo Vrange

4.8 3 kW

14.4 1 kW

3.2

4.5 kW

9.6

1.5 kW

2.4

6 kW

7.2

6 kW

PARAMETER

POWER SYSTEM

Model --->

9000Lx/2

1 phs mode

9000Lx/2

3 phs mode

12000Lx/2

1 phs mode

12000Lx/2

3 phs mode

Max current, 120 V, Lo Vrange

1.6 9 kW

4.8 3 kW

1.2

12 kW

3.6 4 kW

Model --->

13500Lx/3

1 phs mode

13500Lx/3

3 phs mode

18000Lx/2

1 phs mode

18000Lx/3

3 phs mode

Max current, 120 V, Lo Vrange

0.96

13.5 kW

3.2

4.5 kW

0.8

18 kW

7.2 6 kW

6.3 Measurement Calibration

The Lx/Ls Series controller measures voltage and current by digitizing both voltage and current waveforms on each available output phase. This data is subsequently processed and use to calculate all measurement parameters such as VRMS, IRMS, Power, VA, Frequency etc. To calibrate all measurements, only the voltage and current measurement need to be calibrated specifically. All other measurements are derived from these.

Connect the test equipment to the power source. If the power system is a master/auxiliary multibox system with one controller, the DVM for calibrating the measurement voltage should always be connected to the Remote Sense connector on the Master cabinet.

Note: The Fluke 8506A or Agilent HP 34401A Digital Multi meter (or higher AC accuracy

DMM) must be used for the following calibration. The DMM must be set to the AC HI ACCUR mode for all AC measurements.

The shunt must be connected in series with the load. Connect the load to the output. Use a 10 mOhm current shunt of sufficient power rating in series with the load to measure the AC load current.

To calibrate all measurement functions, the desired value for the measurement value of current or voltage must be entered for the corresponding calibration value. Make the indicated adjustments by typing in the desired display value. This should be the value indicated by the external DVM. If a 10 mOhm current shunt is used for current, 300 mV represents 30 amps.

The Calibration Load Table shows required load bank settings for the current measurement calibration procedure. The current should be calibrated in the lowest voltage range only. (Highest current range). The current measurement calibration must be performed for Phase A in both single and three phase mode and for phase B and C in three phase mode only.

Table 6-1: Calibration Load Values- Single-chassis configurations

Table 6-2: Calibration Load Values- Multi-chassis configurations

AMETEK Ls Series User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual