AMETEK SLH Series RevC User Manual

SLH Series DC High

Power Electronic Load

Operating Manual

M540074-01 Rev C www.programmablepower.com

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 electromec hanical 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

SLH Series DC High Power Electronic Load Operating Manual

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

August 2008 Revision C

Part Number

M540074-01

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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Important Safety Instructions

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

WARNIN

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.

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.

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

SAFETY SYMBOLS

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Product Family: SLH Series DC High Power Electronic Load

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.

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ABOUT THIS MANUAL

This manual has been written expressly for the Sorensen brand SL series of electronic loads, which have been designed and certified to meet the Low Voltage and Electromagnetic Compatibility Directive Requirements of the European Community.

Since the goal of the Low Voltage Directive is to ensure the safety of the equipment operator, universal graphic symbols have been used both on the unit itself and in this manual to warn the operator of potentially hazardous situations (see Safety Notice, this manual).

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SECTION 1 INTRODUCTION............................................................1-1

1.1 General Description...............................................................................................................................1-1

1.1.1 Power Contours............................................................................................................................1-1

1.1.2 Operating Modes..........................................................................................................................1-4

1.2 Features....................................................................................................................................................1-6

1.3 Accessories.............................................................................................................................................1-6

1.4 Specifications .........................................................................................................................................1-7

1.5 Regulatory Compliance........................................................................................................................1-9

1.6 Block Diagram......................................................................................................................................... 1-9

SECTION 2 INSTALLATION AND MAINTENANCE ........................2-1

2.1 Inspection.................................................................................................................................................2-1

2.1.1 Check Line Voltage ......................................................................................................... 2-1

2.1.2 Grounding Requirements ............................................................................................................ 2-2

2.1.3 Environmental Requirements .......................................................................................... 2-2

2.1.4 Tilt Adjustment ..............................................................................................................................2-2

2.1.5 Rack Mount ...................................................................................................................................2-2

2.1.6 Repair.............................................................................................................................................2-2

2.2 Connections ............................................................................................................................................2-3

2.2.1 GPIB Connection..........................................................................................................................2-3

2.2.2 Input Binding Post and Wire Considerations ...........................................................................2-4

2.2.3 The Power Line Frequency 50/60 Hz Setting ..........................................................................2-4

2.3 Maintenance ............................................................................................................................................2-5

2.3.1 Cleaning.........................................................................................................................................2-5

SECTION 3 OPERATION..................................................................3-1

3.1 Front Panel Controls and Indicators.................................................................................................3-1

3.1.1 Summary Chart.............................................................................................................................3-6

3.2 Operation – Setup and OCP/OPP Tests...........................................................................................3-7

3.2.1 Overview of Front Panel Operation ...........................................................................................3-7

3.2.2 Initial Setup (LIMIT Key)..............................................................................................................3-7

3.3 Normal Operating Modes...................................................................................................................3-11

3.4 STORE / RECALL Function ...............................................................................................................3-15

3.4.1 STORE Procedure: ....................................................................................................................3-15

3.4.2 RECALL Procedure: ..................................................................................................................3-15

3.5 SEQUENCE Function..........................................................................................................................3-16

3.5.1 EDIT Mode ..................................................................................................................................3-17

3.5.2 TEST Mode .................................................................................................................................3-17

3.6 Initial Setting of SLH-Series DC Loads...........................................................................................3-18

3.7 Analog Programming Input...............................................................................................................3-19

3.8 Load Coarse/Fine Increase/Decrease Adjustment Key..............................................................3-19

3.9 I-Monitor .................................................................................................................................................3-21

3.10 Protection Features.............................................................................................................................3-21

3.10.1 Over voltage...................................................................................................................3-21

3.10.2 Over Current ..................................................................................................................3-22

3.10.3 Over Power ....................................................................................................................3-22

3.10.4 Over Temperature..........................................................................................................3-22

3.10.5 Reverse Polarity.............................................................................................................3-23

SECTION 4 CONNECTIONS AND APPLICATIONS........................4-1

4.1 Local Sense Connections....................................................................................................................4-1

4.2 Remote Sense Connections................................................................................................................4-2

4.3 Constant Current (CC) Mode Application........................................................................................4-3

4.3.1 Static Mode: .....................................................................................................................4-3

4.3.2 Dynamic Mode: ................................................................................................................4-4

4.4 Constant Voltage (CV) Mode Application........................................................................................4-5

4.5 Constant Resistance (CR) Mode Application.................................................................................4-6

4.6 Constant Power (CP) Mode Application...........................................................................................4-7

SECTION 5 REMOTE PROGRAMMING...........................................5-1

5.1 RS-232 Interface and Commands...................................................................................................... 5-1

5.2 GPIB/RS-232C Command List ............................................................................................................5-2

5.2.1 Command Syntax Abbreviations................................................................................................5-2

5.3 GPIB/RS-232 Command Description ................................................................................................5-6

5.3.1 Setting Commands..........................................................................................................5-6

5.3.2 Query Commands ......................................................................................................... 5-13

Appendices List of Tables

TABLE 1-1 AC LINE INPUT ........................................................................................................................................................1-7

TABLE 1-2 TABLE 1 2 SLH-SERIES SPECIFICATIONS..............................................................................................................1-8

TABLE 3-1 SLH-SERIES DC ELECTRONIC LOAD FACTORY SETTINGS FOR POWER ON......................................................3-18

TABLE 3-2 RESOLUTION OF RANGE 1/2 VS COARSE/FINE LOAD CURRENT SETTING KEYS ................................................3-20

TABLE 3-3 SUMMARY OF OVER PROTECTION VALUES ..........................................................................................................3-22

TABLE 5-1 GPIB COMMAND TERMINATOR...............................................................................................................................5-2

TABLE 5-2 GPIB/RS-232 SETTING COMMAND SUMMARY .....................................................................................................5-3

TABLE 5-3 GPIB/RS-232 PRESET QUERY COMMAND SUMMARY WITH APPLICABLE MODULE TYPES .................................5-3

TABLE 5-4 STATE COMMAND SUMMARY ..................................................................................................................................5-4

TABLE 5-5 SYSTEM COMMANDS - ALL MODULES ....................................................................................................................5-4

TABLE 5-6 MEASURE AND LIMIT COMMANDS ...........................................................................................................................5-5

TABLE 5-7 GLOBAL COMMANDS ...............................................................................................................................................5-5

List of Figures

FIGURE 1-1 SLH-60-120-600 POWER CONTOUR ............................................................................................................... 1-1

FIGURE 1-2 SLH-60-120-1200 POWER CONTOUR ............................................................................................................. 1-2

FIGURE 1-3 SLH-60-120-1800 POWER CONTOUR ............................................................................................................. 1-2

FIGURE 1-4 SLH-60-240-1200 POWER CONTOUR ............................................................................................................. 1-3

FIGURE 1-5 SLH-60-240-1800 POWER CONTOUR ............................................................................................................. 1-3

FIGURE 1-6 SLH-60-360-1800 POWER CONTOUR ............................................................................................................. 1-4

FIGURE 1-7 CONSTANT CURRENT (CC) MODE .................................................................................................................... 1-4

FIGURE 1-8 CONSTANT RESISTANCE (CR) MODE ............................................................................................................... 1-5

FIGURE 1-9 CONSTANT VOLTAGE (CV) MODE ..................................................................................................................... 1-5

FIGURE 1-10 DYNAMIC WAVEFORM ...................................................................................................................................... 1-6

FIGURE 1-11 BLOCK DIAGRAM OF SLH-SERIES ELECTRONIC LOAD................................................................................... 1-9

FIGURE 2-1 SETTING SWITCH................................................................................................................................................ 2-1

FIGURE 2-2 AC LINE RECEPTACLE ....................................................................................................................................... 2-2

FIGURE 2-3 SLH-SERIES HIGH POWER LOAD REAR PANEL................................................................................................ 2-3

FIGURE 3-1 SLH-SERIES HIGH POWER LOAD FRONT PANEL.............................................................................................. 3-1

FIGURE 3-2 ORGANIZATION OF FRONT PANEL CONTROLS OF SLH-SERIES DC PLUG-IN MODULE................................... 3-6

FIGURE 3-3 FLOW CHART FOR LOAD MODULE GENERAL SETUP PARAMETERS AND OCP AND OPP TESTS ................. 3-10

FIGURE 3-4 DYNAMIC MODE WAVEFORM AND DEFINITION PARAMETERS ......................................................................... 3-13

FIGURE 3-5 NORMAL OPERATING MODE FLOWCHART .......................................................................................................3-14

FIGURE 3-6 STORE/RECALL/SEQUENCE CONTROL BUTTONS............................................................................................. 3-15

FIGURE 3-7 AUTO SEQUENCE FUNCTION SET-UP AND OPERATION FLOWCHART............................................................. 3-16

FIGURE 3-8 ANALOG PROGRAMMING LOAD CURRENT IN CC MODE OPERATION .............................................................3-19

FIGURE 4-1 LOCAL VOLTAGE SENSE CONNECTIONS ............................................................................................................ 4-1

FIGURE 4-2 REMOTE VOLTAGE SENSE CONNECTIONS ........................................................................................................ 4-2

FIGURE 4-3 CONSTANT CURRENT MODE APPLICATION........................................................................................................ 4-3

FIGURE 4-4 DYNAMIC LOAD CURRENT WITH INDEPENDENT PROGRAMMED RISE/FALL SLEW RATE .................................. 4-4

FIGURE 4-5 CONSTANT VOLTAGE MODE APPLICATION ........................................................................................................ 4-5

FIGURE 4-6 CONSTANT RESISTANCE ODE APPLICATION ......................................................................................................4-6

FIGURE 4-7 CONSTANT POWER MODE APPLICATION ........................................................................................................... 4-7

FIGURE 5-1 RS-232 INTERFACE DIAGRAM ........................................................................................................................... 5-1

FIGURE 5-2 PROTECTION STATUS REGISTER .....................................................................................................................5-16

FIGURE 5-3 ERROR STATUS BYTE REGISTER..................................................................................................................... 5-17

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1.1 GENERAL DESCRIPTION

1.1.1 Power Contours

The SLH-Series High Power DC Electronic Load is designed to test, evaluate and burn in DC power supplies and batteries. The power contour of the six models are shown in Figure 1-1 through Figure 1-6. The Sorensen SLH-Series High Power DC Electronic Load can be controlled locally at the front panel or remotely via computer over the GPIB.

SECTION 1

INTRODUCTION

Voltage (V)

0.5 0

0 60 120

Current (A)

Figure 1-1 SLH-60-120-600 Power Contour

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Introduction Sorensen SLH-Series DC High Power Electronic Load

Voltage (V)

1 0

0 60 120

Current (A)

Figure 1-2 SLH-60-120-1200 Power Contour

Voltage (V)

0 60 120

Current (A)

Figure 1-3 SLH-60-120-1800 Power Contour

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Sorensen SLH-Series DC High Power Electronic Load Introduction

Voltage (V)

5 1

0 120 240

Current (A)

Figure 1-4 SLH-60-240-1200 Power Contour

Voltage (V)

7.5

Current (A)

0 120 240

Figure 1-5 SLH-60-240-1800 Power Contour

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Introduction Sorensen SLH-Series DC High Power Electronic Load

Voltage (V)

5 1 0

0 180 360

Current (A)

Figure 1-6 SLH-60-360-1800 Power Contour

1.1.2 Operating Modes

The operating modes of SLH-series Electronic Load include: Constant Current (CC) mode, Constant Resistance (CR) mode, and Constant Voltage (CV) mode. The wide-range dynamic load with independent rise/fall current slew rate and analog programming input with arbitrary waveform input, is available in Constant Current mode.

CC Mode:

In Constant Current mode, the load will sink a current in accordance with the programmed current setting regardless of the input voltage (see Figure 1-7).

Figure 1-7 Constant Current (CC) Mode

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Sorensen SLH-Series DC High Power Electronic Load Introduction

CR Mode:

In Constant Resistance mode, the load will sink a current linearly proportional to the load input voltage in accordance with the programmed resistance setting (see Figure 1-8).

Figure 1-8 Constant Resistance (CR) Mode

CV Mode:

In Constant Voltage mode, the load will attempt to sink enough current until the load input voltage is equal to the programmed voltage setting (see Figure 1-9).

Figure 1-9 Constant Voltage (CV) Mode

Dynamic Waveform Definition

There are six parameters to generate dynamic wave form or pulse wave form: High/Low load levels, Rise/Fall slew rates, and T

HIGH/TLOW durations. The SLH-series Electronic

Load will sink current from the power source proportional to the dynamic waveform. The dynamic waveform definition is shown in Figure 1-10. The period of dynamic wave form is, dynamic frequency = 1 /(T

HIGH + TLOW ), the Duty cycle = THIGH / (THIGH + TLOW)

The formula to define the period of dynamic waveform (T

HIGH + TLOW) is:

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Introduction Sorensen SLH-Series DC High Power Electronic Load

Dynamic frequency = 1 /(THIGH + TLOW)

Duty cycle = T

The load current level and load status can be set by either of two ways: manually, through the front panel, or with GPIB command. The load input voltage and load current can be read back to the computer through GPIB. (GPIB operation is described in Section 4).

HIGH / (THIGH + TLOW)

Figure 1-10 Dynamic Waveform

1.2 FEATURES

• Full GPIB control of Load condition setting and meter read back

• Dual high accuracy & resolution 4-1/2 digit voltage and current meter

• Built-in pulse generator includes wide T

Rise/Fall load current slew rate control, and High/Low Load Level

• Controllable load current Slew Rate of load Level change, load ON/OFF switch change,

and power supply turn-on

• Short circuit test and current measure capability, low short resistance and reliable short

circuitry is implemented by turn ON Power MOSFET and heavy duty relay

• Automatic voltage sense capability

• Full protection from over power, over temperature, over voltage, and reverse polarity

• Analog programming input capability at rear panel

• Isolated I-monitor BNC output, 10V full scale

1.3 ACCESSORIES

• V-sense cable: BNC-CLIP (1M) 1 ea.

• Binding Post Plug (Black) 1 ea.

• Binding Post Plug (Red) 1 ea.

HIGH/TLOW dynamic load range, independent

• Hook terminal 2 ea.

• SLH-Series High Power DC Electronic Load operation manual 1 ea.

• Screws, M8x25 2 ea.

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Sorensen SLH-Series DC High Power Electronic Load Introduction

1.4 SPECIFICATIONS

The next two tables provide specifications for the SLH DC High Power Electronic Load:

LINE 100V/115V±10% 200V/230V±10% FREQUENCY 50/60 HZ AC INPUT FUSE 2A/250V (5x20mm) 1A/250V (5x20mm) MAX. POWER

CONSUMPTION DIMENSIONS (W*H*D) 17.3x7.0x17.5 in. (440 x177 x445 mm) WEIGHT NET : 51.9 lbs. (23.6 kg)

Table 1-1 AC Line Input

100 W

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Introduction Sorensen SLH-Series DC High Power Electronic Load

The following specifications apply 25°C ± 5°C:

Table 1-2. SLH-Series Specifications

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Sorensen SLH-Series DC High Power Electronic Load Introduction

1.5 REGULATORY COMPLIANCE

• Certified to UL 61010-1, CSA C22.2 No. 61010.1 and IEC/EN 61010-1

• CE Compliant:

o Low Voltage Directive (73/23/EEC) using EN 61010-1, and

o EMC Directive (89/336/EEC) using EN 61326

• FCC Compliant to 21 CFR, Subpart J.

1.6 BLOCK DIAGRAM

The functional block diagram of SLH-series DC electronic Load module is illustrated in Figure 1-11. Please refer to the SLH Mainframe Operation Manual for the functional Block diagram of the mainframe.

Figure 1-11 Block Diagram of SLH-Series Electronic Load

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Introduction Sorensen SLH-Series DC High Power Electronic Load

• The front panel of the SLH-Series provides the load current level and the load status.

• The following three pairs of parameters constitute the wide range pulse generator, and

can be used to test the power supply (Device Under Test - DUT):

◦ Two 12-bit D/A converters receive digital data of load current, and transfer as an

analog signal.

◦ Two 8-bit D/A converters control the load current slew rate. ◦ Two 16-bit trimmers set the T

HIGH and TLOW durations

• The Constant Current ( CC ), Constant Resistance ( CR ), and Constant Voltage ( CV )

control circuitry. Range circuitry is selected by existing operating mode and range.

• The drive circuit controls the load current flow through power MOSFET, proportional to

the analog control signal. The Short ON/OFF signal through short drive circuit turns the Power MOSFET fully ON.

• The current sense Amplifier feeds the load current signal including the short circuit

current signal, to the digital meter (DM) and isolated amplifier to Imonitor BNC output.

• The voltage Auto-sensing circuit selects the Load input terminal or Vsense BNC input

depending on whether the Vsense cable is connected or not. The Auto-ranged, high accuracy 4 1/2 digit (five-character) voltage meter indicates the input voltage.

• The 4 1/2-digit (five-character) voltage meter and 4 1/2-digit (five-character) current

meter digital bus is connected to CPU circuitry.

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INSTALLATION AND MAINTENANCE

2.1 INSPECTION

The SLH-series high power load was carefully inspected before shipment. If instrument damage has occurred during transport, please inform the Xantrex sales and service office or representative (see Warranty). Your SLH-series high power load was shipped with a power cord for the type of outlet used at your location. If the appropriate cord was not included, please contact your nearest Xantrex sales office to obtain the correct cord. Refer to "check line voltage" for voltage selection and fuse type.

SECTION 2

2.1.1 Check Line Voltage

The SLH-series high power load can operate with 115, 230VAC input as indicated on the rear panel label. Make sure that the factory check mark corresponds to your nominal line voltage. If not correctly marked, perform the following procedures:

1. With the load power OFF, disconnect the power cord.

2. Refer to the drawing of the SLH-series load rear in Figure 2-1; set the switches to the proper voltage as described in the following steps:

Voltage configuration

Voltage selection switch

Figure 2-1 Setting Switch

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Installation Sorensen SLH-Series DC High Power Electronic Load

a. Mark the correct voltage on the rear panel of SLH-series high power load. b. Check the rating of the line fuse and replace it with the correct fuse if necessary.

(The line fuse is located below the AC line receptacle see Figure 2-2).

c. With the power cord removed, use a small screwdriver to extract the fuse holder

from under the AC socket.

d. Replace the fuse with the appropriate type as indicated in Figure 2-1. These fuses

are slow-blow fuses.

e. Reinstall fuse holder and connect the power cord.

Figure 2-2 AC Line Receptacle

2.1.2 Grounding Requirements

The SLH-series high power load is equipped with a three-conductor cable that plugs into an appropriate receptacle to ground the instrument's cover.

2.1.3 Environmental Requirements

• For indoor use only

• Installation Category II (overvoltage)

• Pollution Degree 2

• Altitude up to 2000 meters (with power derating)

• Relative Humidity 80% RH Max

• Ambient Operating Temperature 0-40°C, with ideal being 25°C ± 5°C

2.1.4 Tilt Adjustment

The SLH-Series high power load is equipped with adjustable tilt stands for use as a benchtop instrument to provide a user-friendly viewing angle.

2.1.5 Rack Mount

The SLH-Series high power load is designed to permit mounting in a standard 19-inch rack for system application.

2.1.6 Repair

If the instrument is damaged, please attach a tag to the instrument to identify the owner and indicate the required service or repairing. Follow the procedures in the Warranty page.

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Sorensen SLH-Series DC High Power Electronic Load Installation

2.2 CONNECTIONS

CAUTION: PREVENT DAMAGE TO THE LOAD. Do NOT apply voltage or current with

power switched OFF. Turn ON the power switch to the load PRIOR to applying voltage or current to the input terminals (i.e., before turning on the power supply under test).

2.2.1 GPIB Connection

The GPIB connector on the rear panel connects the SLH-series high power load to the controller and to other GPIB devices. A GPIB system can be connected in any configuration (star, linear, or both), with the following two provisions:

1. There are no more than 15 devices, including the controller.

2. The maximum length of all cables combined is 20 meters, calculated at 2 meters times the number of devices connected.

Please ensure that the lock screws are firmly hand-tightened; use a screwdriver only for the removal of screws.

Figure 2-3 shows the rear panel of SLH-series high power load, the GPIB connector and GPIB address setting switch is located on the rear panel of SLH-series high power load. The initial GPIB address of the SLH-series high power load is factory set to address 05.

Figure 2-3 SLH-Series High Power Load Rear Panel

GPIB Address Setting:

To set the GPIB address, simultaneously press the STATE 4+STATE 5 keys on the front panel. Press UP or DOWN on the BANK keys to select the address number (0-31), press STATE 2 to exit GPIB address setting mode.

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Installation Sorensen SLH-Series DC High Power Electronic Load

2.2.2 Input Binding Post and Wire Considerations

The output of the device under test (DUT) is connected to the load by bus bars located at

the rear of the load. A major consideration in making input connection is the wire size. The minimum wire size is required to prevent overheating and to maintain good regulation. It is recommended that the wires be large enough to limit the voltage drop to less than 0.5V per lead.

Note: When using Constant Resistance mode, Vsense inputs should be used

to avoid affecting measurements and regulation by cable resistance.

Low Current Testing, below 60A input.

The positive (+) and negative (-) binding posts can be connected to the wires/cables according to the following guidelines:

Bus Bars

The connection is through the bus bars at the rear of the SLH series load. This is the same connection as high current testing.

Plug Connectors

This is the most popular way to connect the input of electronic load to the device under test. It is recommended the load current be less than 20A in this connection since the current rating of the plug is rated to 20A. The maximum wire gauge should be limited to AWG14.

Hook Terminals

The hook terminal provides a good contact to the binding post and can be used anytime. The maximum wire gauge should be limited to AWG10.

Direct Insertion into Binding Posts

This is the most convenient way to connect the load input to the DUT. The maximum wire gauge AWG14 can be used in this application.

Plug Connectors and Hook Terminals

This method is recommended when input current is greater than 20A.

Plug Connectors and Direct Insertion

This method is also recommended when input current is greater than 20A.

2.2.3 The Power Line Frequency 50/60 Hz Setting

The high accuracy 4-1/2 digit voltage and current meters use dual slope integrated theory to measure the analog voltage and current signal. The accuracy of the meter is the best when the integration cycle is synchronized with the power line frequency. (The input line voltage and line frequency of SLH-series high power load.) There are two power line frequencies that can be selected, 50Hz or 60Hz.

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+ 65 hidden pages

AMETEK SLH Series RevC User Manual

About AMETEK

ABOUT THIS MANUAL

CONTENTS

1.1 GENERAL DESCRIPTION

1.1.1 Power Contours

1.1.2 Operating Modes

1.2 FEATURES

1.3 ACCESSORIES

1.4 SPECIFICATIONS

1.5 REGULATORY COMPLIANCE

1.6 BLOCK DIAGRAM

2.1 INSPECTION

2.1.1 Check Line Voltage

2.1.2 Grounding Requirements

2.1.3 Environmental Requirements

2.1.4 Tilt Adjustment

2.1.5 Rack Mount

2.1.6 Repair

2.2 CONNECTIONS

2.2.1 GPIB Connection

2.2.2 Input Binding Post and Wire Considerations

2.2.3 The Power Line Frequency 50/60 Hz Setting