AMETEK SLH Series RevB User Manual
Smart choice for power
Xantrex Technology Inc.
Programmable Products
9250 Brown Deer Road
San Diego, CA 92121
USA
858 450 0085 Phone
858 458 0257 Fax
www.programmablepower.com
SLH-Series AC High
Power Electronic
Load
Operating and Programming
Manual
M540073-01 Rev C www.programmablepower.com
About Xantrex
Xantrex Technology Inc. is a world-leading supplier of advanced power electronics and
controls with products from small mobile units to utility-scale systems for wind, solar,
batteries, fuel cells, microturbines, and backup power applications in both gridconnected and stand-alone systems. Xantrex products include inverters, battery
chargers, programmable power supplies, and variable speed drives that convert, supply,
control, clean, and distribute electrical power.
Trademarks
SLH-Series AC High Power Electronic Load is a trademark of Xantrex International.
Xantrex is a registered trademark of Xantrex International.
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 AC High Power Electronic Load
December 2007 Xantrex International. All rights reserved.
Exclusion for Documentation
UNLESS SPECIFICALLY AGREED TO IN WRITING, XANTREX TECHNOLOGY INC.
(“XANTREX”)
(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
(c) REMINDS YOU THAT IF THIS MANUAL IS IN ANY LANGUAGE OTHER THAN
ENGLISH, ALTHOUGH STEPS HAVE BEEN TAKEN TO MAINTAIN THE ACCURACY OF THE
TRANSLATION, THE ACCURACY CANNOT BE GUARANTEED. APPROVED XANTREX
CONTENT IS CONTAINED WITH THE ENGLISH LANGUAGE VERSION WHICH IS POSTED
AT WWW.PROGRAMMABLEPOWER.COM.
Operating and Programming Manual ©
Date and Revision
December 2007 Revision B
Part Number
M540073-01
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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ii
Important Safety Instructions
Before applying power to the system, verify that your product is configured properly for your
particular application.
WARNING
Only
qualified personnel
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
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.
must
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.
who deal with attendant hazards in power supplies, are allowed to
be grounded properly for both personnel and equipment safety.
SAFETY SYMBOLS
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iv
Important Safety Instructions
This manual has been written expressly for the Sorensen SLH 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 Information page).
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vi
CONTENTS
SECTION 1 FEATURES, FUNCTIONS, AND SPECIFICATIONS ....1-1
1.1 General Description ......................................................................................... 1-1
1.2 Power Contours ............................................................................................... 1-1
1.3 Operating Modes ............................................................................................. 1-4
1.4 Features and Functions ................................................................................... 1-5
1.5 Accessories ..................................................................................................... 1-5
1.6 Specifications................................................................................................... 1-5
1.7 Regulatory Compliance ................................................................................... 1-7
1.8 System Block Diagram .................................................................................... 1-7
SECTION 2 INSTALLATION AND MAINTENANCE .......................2-1
2.1 INSPECTION................................................................................................... 2-1
2.1.1 Line Voltage......................................................................................... 2-1
2.1.2 Grounding Requirements..................................................................... 2-2
2.1.3 Environmental Requirements .............................................................. 2-2
2.1.4 Rack Mount.......................................................................................... 2-2
2.1.5 Tilt Adjustment ..................................................................................... 2-3
2.1.6 Service or Repair ................................................................................. 2-3
2.2 Connections..................................................................................................... 2-3
2.2.1 Voltage Sensing Input (Vsense) BNC Connector. ............................... 2-3
2.2.2 RS-232C Connection........................................................................... 2-4
2.2.3 GPIB Connection ................................................................................. 2-4
2.3 Maintenance .................................................................................................... 2-5
2.3.1 Cleaning............................................................................................... 2-5
v
Contents
SECTION 3 OPERATION.............................................................. 3-1
3.1 Front Panel Controls and Indicators.................................................................3-1
3.2 Set-up Procedures ...........................................................................................3-5
3.3 Normal Operation.............................................................................................3-9
3.3.1 CC Mode: .............................................................................................3-9
3.3.2 Crest Factor Selection:.........................................................................3-9
3.3.3 CR Mode ............................................................................................3-10
3.4 STORE / RECALL Function and Sequence Operation ..................................3-12
3.4.1 STORE Procedure: ............................................................................3-12
3.4.2 RECALL Procedure............................................................................3-12
3.4.3 AUTO SEQUENCE Procedures.........................................................3-12
3.5 Initial Settings of SLH-series AC/DC Electronic Load ....................................3-14
3.6 Protection Features........................................................................................3-15
3.6.1 Over Voltage ......................................................................................3-16
3.6.2 Over Current ......................................................................................3-16
3.6.3 Over Power ........................................................................................3-16
3.6.4 Over Temperature..............................................................................3-16
SECTION 4 GPIB/RS-232 PROGRAMMING OPERATION ............. 4-1
4.1 Introduction ......................................................................................................4-1
4.2 SLH-series GPIB COMMAND LIST .................................................................4-1
4.2.1 Setting Commands...............................................................................4-1
4.2.2 Query Commands ................................................................................4-2
4.3 Command Syntax Abbreviations......................................................................4-3
4.4 GPIB/RS-232 Command Description...............................................................4-6
4.4.1 Setting Commands...............................................................................4-6
4.4.2 Query Commands ..............................................................................4-12
APPENDIX A SLH-series AC/DC Load Wave Form Data Bank .......................................... A-1
APPENDIX B SLH-series AC/DC Load R.201 Edition Wave Form Data Bank ................... B-1
APPENDIX C Setting the AC or DC Electronic Load........................................................... C-1
APPENDIX D Installation Guide and Specification Addendum for SLH-Series Electronic
Loads: Master/Slave Configurations............................................................. D-1
LIST OF FIGURES
Figure 1-1 SLH-500-4-1200 Electronic Load Power Curve ......................................... 1-1
Figure 1-2 SLH-500-6-1800 Electronic Load Power Curve ......................................... 1-2
Figure 1-3 SLH-300-12-1200 Electronic Load Power Curve ....................................... 1-2
Figure 1-4 SLH-300-12-1800 Electronic Load Power Curve ....................................... 1-3
vi
Contents
Figure 1-5 SLH-300-18-1800 Electronic Load Power Curve ........................................1-3
Figure 1-6 Characteristics of CC Mode ........................................................................1-4
Figure 1-7 Characteristics of CR Mode ........................................................................1-4
Figure 1-8 System Block Diagram................................................................................1-7
Figure 2-1 Setting Switch .............................................................................................2-1
Figure 2-2 Fuse Holder in AC Line Input Connector ....................................................2-2
Figure 2-3 Connection Method for Small Load Current Condition................................2-3
Figure 2-4 Typical Connection for SLH-series High Power AC/DC Electronic Load ....2-3
Figure 2-5 Close-up, Front Panel State Keys...............................................................2-4
Figure 2-6 SLH-series Rear Panel ...............................................................................2-4
Figure 3-1 Front Panel of SLH-series High Power AC/DC Electronic Load .................3-1
Figure 3-2 Front Panel Button Functions for SLH-series AC Unit ................................3-5
Figure 3-3 Illustration of Sync.......................................................................................3-6
Figure 3-4 SLH-series AC Electronic Load Operation Flow Chart ...............................3-8
Figure 3-5 STORE/RECALL and Sequencing Keypad...............................................3-12
Figure 3-6 Auto Sequence Function Set-Up and Operation Flowchart ......................3-13
Figure 4-1 Protection Status Register ........................................................................4-14
Figure 4-2 Error Status Byte Register ........................................................................4-14
LIST OF TABLES
Table 1-1 SLH-series AC/DC Specification ..................................................................1-6
Table 3-1 Built in Crest Factor Settings by Bank andKkey Selection ...........................3-7
Table 3-2 SLH-series AC Electronic Load Factory Settings.......................................3-15
Table 3-3 SLH-series Protection Setting Values ........................................................3-16
Table 4-1 GPIB Setting Command Summary...............................................................4-1
Table 4-2 GPIB Query Command Summary ................................................................4-2
Table 4-3 GPIB Command Terminator.........................................................................4-3
Table 4-4 GPIB/RS-232 Setting Command Summary .................................................4-4
Table 4-5 GPIB/RS-232 Preset Query Command Summary with Applicable Module
Types ...........................................................................................................4-4
Table 4-6 State Command Summary ...........................................................................4-4
Table 4-7 System Commands - All Modules ................................................................4-5
Table 4-8 Measure and Limit Commands ....................................................................4-5
Table 4-9 Global Commands........................................................................................4-5
Table 4-10 Waveform Information ..............................................................................4-10
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Contents
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viii
FEATURES, FUNCTIONS,
AND SPECIFICATIONS
1.1 GENERAL DESCRIPTION
SLH-Series High Power, AC/DC Electronic Load is used to test the specification
characteristics of AC/DC high power suppliers and the service life characteristics of
batteries.
The load works with GPIB interface and front panel manual operation.
SECTION 1
1.2 POWER CONTOURS
The power contours of the SLH-Series AC/DC Electronic Loads are shown in the
following figures.
500
300
250
Voltage (V)
10
0
024
Figure 1-1 SLH-500-4-1200 Electronic Load Power Curve
2.4
Current (A)
M540073-01 Rev C 1-1
Features, Functions and Specifications SLH-Series AC High Power Electronic Load
00
500
300
250
Voltage (V)
10
0
036
Current (A)
3.6
Figure 1-2 SLH-500-6-1800 Electronic Load Power Curve
300
2
150
Voltage (V)
100
5
0
0612
4
Current (A)
8
Figure 1-3 SLH-300-12-1200 Electronic Load Power Curve
1-2 M540073-01 Rev C
SLH-Series AC High Power Electronic Load Features, Functions and Specifications
300
150
Voltage (V)
5
0
0612
Current (A)
Figure 1-4 SLH-300-12-1800 Electronic Load Power Curve
300
200
150
Voltage (V)
100
5
0
0918
6
Current (A)
12
Figure 1-5 SLH-300-18-1800 Electronic Load Power Curve
M540073-01 Rev C 1-3
Features, Functions and Specifications SLH-Series AC High Power Electronic Load
1.3 OPERATING MODES
The work mode of SLH-series High Power AC Electronic Load includes Constant
Current (CC) and Constant Resistance (CR).
CC Mode
:
During CC mode, the load current input into SLH-series High Power, AC Electronic Load
depends on the current setting regardless of the input voltage, i.e., the
current setting remains unchanged.
I
CC
CURRENT SETTING
LOAD
CURRENT
V
INPUT VOLTAGE
Figure 1-6 Characteristics of CC Mode
CR Mode:
During C.R. mode, the load current input into SLH-series High Power AC/DC Electronic
Load depends on the resistance setting. At this time, the load current is in direct proportion
to input voltage, e.g. the resistance setting remains unchanged. Please refer to Fig. 1.7
below
I
LOAD
CURRENT
RESISTANCE
SETTING
V
INPUT VOLTAGE
Figure 1-7 Characteristics of CR Mode
The load setting of SLH-series High Power AC/DC Electronic Load and the load condition
setting of the front panel can be made through front panel manual operation or through
GPIB commands. The load voltage and current can be transmitted to the computer through
GPIB bus. For operation of GPIB, please refer to Section 4 GPIB Operation
1-4 M540073-01 Rev C
SLH-Series AC High Power Electronic Load Features, Functions and Specifications
1.4 FEATURES AND FUNCTIONS
• Interface function of full GPIB control, including setting of load condition and read-
back of Vmeter and Ameter
• Dual High Accuracy/High Resolution 4 ½ digit Vmeter and Ameter
• In CC mode, frequency width can reach to 400Hz with the set table range of 1KHz
• In CC mode, the settable Crest Factor can be set to Maximum 3.5
• Automatic judging ability for GO/NG
• Switch-able automatic voltage sensing ability.
• Protection functions include Over-Voltage, Over-Current, Over-Power and Over-
Temperature
• Cooling fan control device with revolution change function
1.5 ACCESSORIES
• Vsense Input BNC Connector 1 PC
• Banana Terminal (Black) 1 PC
• Banana Terminal (Red) 1 PC
• Hook-Type Terminal 2 PC
• SLH-series High Power AC/DC Electronic Load Operation Manual 1 PC
1.6 SPECIFICATIONS
LINE
AC INPUT
MAX. POWER
CONSUMPTION
DIMENSIONS (W*H*D)
WEIGHT
FREQUENCY
FUSE
100V/115V±10% 200V/230V±10%
50/60 HZ
T2A/250V
(5 x 20mm)
440mm x 177mm x 445mm
13 Kg
T1A/250V
(5 x 20mm)
100 W
M540073-01 Rev C 1-5
Features, Functions and Specifications SLH-Series AC High Power Electronic Load
NOTE: The following specifications apply 25°±5°:
MODEL SLH-500-4-1200 SLH-500-6-1800 SLH-300-12-
SLH-300-18-1800
1200/1800
INPUT RATINGS
Power (VA) 1200 VA 1800 VA 1200/1800 VA 1800 VA
Current (Ampere) 4 Arms 6 Arms 12 Arms 18 Arms
Voltage (Volt) 300 Vrms/500 Vdc 300 Vrms/500 Vdc 300Vrms 300Vrms
Frequency
CC MODE
DC, 40 - 70Hz (CC Mode) ; DC - 70Hz (CR Mode)
Range 0-2 / 2-4 A 0-3 / 3-6 A 0-6 / 6-12 A 0-9 / 9-18 A
Resolution 0.5 / 1 mA 0.75 / 1.5 mA 1.5 / 3 mA 2.25 / 4.5 mA
Accuracy
Low Current
Range
0 - 0.2 A 0 - 0.3 A 0 - 0.6 A 0 - 0.9 A
±0.5% of (setting + range)
Accuracy ± 2% of (setting + range)
Crest Factor √2 - 3.5 (Maximum current = 2 x Rated Current)
Maximum Peak
Current
CR MODE
Range 1
(I>0.5% of rating)
Range 2
(I>50% of rating)
4-1/2 DVM
8A 12A 24A 18A
50 - 200,000 Ω 33.33 - 133,000 Ω 20 - 80,000 Ω 13.3 - 53,333 Ω
12.5 - 50 Ω 8.33 - 33.33 Ω
5 - 20 Ω
3.33 - 13.33 Ω
Range 0-500V 0-500V 300 V 300 V 300 V
Resolution 0.1 V 0.1 V 0.1 V 0.1 V 0.1 V
Accuracy
4-1/2 DAM
±(0.5% of reading + 0.2% of range)
Range 0-4 A 0-6 A 0-12 A 0-12 A 0-18 A
Resolution 1 mA 1 mA 1 mA 1 mA 1 mA
Accuracy
±(0.5% of reading + 2% of range) ; ±0.5% of (reading + range) @ 50/60Hz
4-1/2 WATT
METER
Range
Resolution
Accuracy
VA METER
0-1200W 0-1800 W 0-1200W 0-1800 W 0-1800 W
0.1 W
± (0.5% of reading)± 3W
Vrms×Arms
Table 1-1 SLH-series AC/DC Specifications
1-6 M540073-01 Rev C
SLH-Series AC High Power Electronic Load Features, Functions and Specifications
1.7 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.
1.8 SYSTEM BLOCK DIAGRAM
Figure 1-8 System Block Diagram
M540073-01 Rev C 1-7
Features, Functions and Specifications SLH-Series AC High Power Electronic Load
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1-8 M540073-01 Rev C
INSTALLATION AND MAINTENANCE
2.1 INSPECTION
The SLH-series High Power, AC/DC Electronic Load was carefully inspected before
shipment. If instrument damage has occurred during transport, please inform
Sorensen's sales and service office or representative.
Your SLH-series High Power AC/DC Electronic 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 Sorensen sales office to obtain the correct cord. Refer to "
check line voltage " to check the line voltage selection and fuse type.
SECTION 2
2.1.1 Line Voltage
The SLH-series High Power AC/DC Electronic Load can operate with 115/230VAC
input as indicated on the rear panel label (or 100/200VAC for Japan units). Make
sure that the factory check mark corresponds to your nominal line voltage. If not
correctly marked, perform the following procedures:
1. With the mainframe power OFF, disconnect the power cord.
2. Refer the drawing on the rear panel in Fig 2-1, set the switches to the proper
voltage as described in the following:
SYNC INPUT
RANGE
115
Figure 2-1 Setting Switch
M540073-01 Rev C 2-1
Installation and Maintenance SLH-Series AC High Power Electronic Load
3. Mark the correct voltage on the rear panel of SLH-series High Power AC/DC
Electronic Load.
4. Check the rating of the line fuse and replace it with the correct fuse if
necessary.
5. The line fuse is located below the AC line receptacle see Fig 2-2. With the
power cord removed, use a small screwdriver to extract the fuse holder from
under the AC socket. Replace the fuse with the appropriate type as indicated in
Table 1-1. These fuses are slow-blow fuses.
6. Reinstall fuse holder and connect the power cord.
Figure 2-2 Fuse Holder in AC Line Input Connector
2.1.2 Grounding Requirements
The SLH-series High Power AC/DC Electronic Load is equipped with a threeconductor cable which plugs in an appropriate receptacle to ground the instrument's
cover.
2.1.3 Environmental Requirements
• For indoor use only
• Installation Category II (over voltage)
• 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 Rack Mount
The SLH-series High Power AC/DC Electronic Load is designed to permit mounting
in a standard 19 inches rack for system application.
2-2 M540073-01 Rev C
SLH-Series AC High Power Electronic Load Installation and Maintenance
2.1.5 Tilt Adjustment
The SLH-series High Power AC/DC Electronic Load is equipped with tilt stands on its
two front feet, which can be flipped forward to provide an inclined viewing angle of
the front panel for bench-top use.
2.1.6 Service or Repair
If the instrument is damaged, please attach a tag to the instrument, identifying the owner
and indicating the required service. Follow the procedures detailed on Page iii of this
manual.
2.2 CONNECTIONS
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
CAUTION
2.2.1 Voltage Sensing Input (Vsense) BNC Connector.
current to the input terminals (i.e., before turning on the power supply under test).
To solve the conductor voltage drop under a big load current, Vsense-CLIP cable
can be used to connect with the specific point to be measured thus obtaining the
specific voltage value. See Figure 2-3 and Figure 2-4.
Figure 2-3 Connection Method for Small Load Current Condition.
Either front or rear connection may be used.
Figure 2-4 Typical Connection for SLH-series High Power AC/DC Electronic Load
Operation and Programming Manual 2-3
Installation and Maintenance SLH-Series AC High Power Electronic Load
2.2.2 RS-232C Connection
Figure 2-5 SLH-series Rear Panel
2.2.3 GPIB Connection
The GPIB connector on the rear panel (Figure 2-5) connects the SLH-series High
Power AC/DC Electronic Load to the controller and to other GPIB devices. An GPIB
system can be connected in any configuration (star, linear, or both) with the following
provisions:
• The maximum number of devices including the controller is no more than 15.
• The maximum length of all cables is no more than 2 meters times the number of
devices connected together, up to 20 meters maximum.
Ensure that the lock screws are firmly hand-tightened; use a screwdriver only for the
removal of screws. The GPIB address of the Load is factory set to 05.
GPIB Address Setting:
Set the GPIB address on the front panel (see Figure 2-6) by pressing
STATE 4+STATE 5 keys simultaneously. Press UP or DOWN on the
BANK keys (white buttons to right) to select the address number (0-31).
Press STATE 2 to exit GPIB address setting mode.
Figure 2-6 Close-up, Front Panel State Keys
2-4 M540073-01 Rev C
SLH-Series AC High Power Electronic Load Installation and Maintenance
2.3 MAINTENANCE
2.3.1 Cleaning
Avoid electrical shock or damage to the meter: do not get water
inside the case.
WARNING!
Periodically wipe the case with a damp cloth and detergent; do not use abrasives or
solvents.
Operation and Programming Manual 2-5
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