Elgar EasyWave EW 3001 User manual

EasyWave AC Power SourceEasyWave AC Power Source
Model EW 3001
Operation Manual
ELGAR CORPORATION
9250 Brown Deer Road
San Diego, CA 92121
EW 3001
Operation
©1998 ELGAR CORPORATION
This document contains information proprietary to Elgar Corporation. The information contained
herein is not to be duplicated or transferred in any manner without prior written permission from
Elgar Corporation.
Document No. M161483-01 Rev. C December 2, 1998
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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ELGAR ONE YEAR WARRANTY
Elgar Corporation (hereinafter referred to as Elgar) warrants its products to be free from defects in
material and workmanship. This product warranty is effective for one year from the date of shipment
to the original purchaser. Liability of Elgar under this warranty shall exist provided that:
•the Buyer exposes the product to normal use and service and provides normal maintenance on the
product;
•Elgar is promptly notified of defects by the Buyer and that notification occurs within the warranty
period;
•the Buyer receives a Return Material Authorization (RMA) number from Elgar’s Customer
Service Department prior to the return of the product to Elgar for repair, phone 800-73-ELGAR
(800-733-5427), ext. 295;
•the Buyer returns the defective product in the original, or equivalent, shipping container;
•if, upon examination of such product by Elgar it is disclosed that, in fact, a defect in materials and/or
workmanship does exist, that the defect in the product was not caused by improper conditions,
misuse, or negligence; and,
•that Elgar markings and nameplates have not been altered or removed and the equipment has not
been repaired or modified by anyone other than Elgar authorized personnel.
This warranty is exclusive and in lieu of all other warranties, expressed or implied, including, but not
limited to, implied warranties of merchantability and fitness of the product to a particular purpose.
Elgar, its agents, or representatives, shall in no circumstance be liable for any direct, indirect, special,
penal, or consequential loss or damage of any nature resulting from the malfunction of the product.
Remedies under this warranty are expressly limited to repair or replacement of the product.
CONDITIONS OF WARRANTY
•To return a defective product, contact an Elgar representative or the Elgar factory for an RMA
number. Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
•For Elgar products found to be defective within thirty days of receipt by the original purchaser, Elgar
will absorb all ground freight charges for the repair. Products found defective within the warranty
period, but beyond the initial thirty-day period, should be returned prepaid to Elgar for repair.
•Normal warranty service is performed by Elgar during the weekday hours of 7:30 am to 4:30 pm
Pacific time. Warranty repair work requested to be accomplished outside of normal working hours
will be subject to Elgar non-warranty service rates.
•Warranty field service is available on an emergency basis. Travel expenses (travel time, per diem
expense, and related air fare) are the responsibility of the Buyer. A Buyer purchase order is required
by Elgar prior to scheduling.
•A product found, upon inspection by Elgar, to be in specification is subject to an inspection fee and
applicable freight charges.
•Equipment purchased in the United States carries only a United States warranty for which repair
must be accomplished at the Elgar factory.
9250 Brown Deer Road
San Diego, California 92121
619/450-0085 • 800/733-5427
FAX: [phone] • TELEX: 211063 ELSD UR
“Committed To Quality....Striving For Excellence”

ii
SAFETY NOTICE
Before applying power to the system, verify that the unit is properly configured for your application.
WARNING!
HAZARDOUS VOLTAGES IN EXCESS OF 280 VRMS, 600V PEAK MAY
BE PRESENT WHEN COVERS ARE REMOVED. THERE ARE NO USER
SERVICEABLE COMPONENTS IN THE UNIT.
Installation and service must be performed by qualified personnel who are aware of dealing with
attendant hazards.
Ensure that the AC power line ground is connected properly to the EW Series unit
input connector. 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 the
input/output power cables.
Depending on your application configuration, HIGH VOLTAGES HAZARDOUS TO
HUMAN SAFETY may be generated normally on the output terminals. Ensure that the
output power lines are labeled properly as to the safety hazards and that any
inadvertent contact with hazardous voltages is eliminated.
Due to filtering, the unit has leakage current to the chassis. Therefore, it is essential to operate this
unit with a safety ground.
SAFETY SYMBOLS
CAUTION
Risk of Electrical Shock
CAUTION
Refer to Accompanying Documents
Off (Supply)
Standby (Supply)
On (Supply)
Direct Current (DC)
Alternating
Three–Phase
Fuse
Earth (Ground) Terminal
Protective Conductor Terminal
Current (AC)
Alternating Current

iii
CONTENTS
Warranty.....................................................................................................................................i
Safety Notice.............................................................................................................................ii
1OVERVIEW
1.1 Introduction...................................................................................................................... 1-1
1.2 Features.......................................................................................................................... 1-1
Configuration.................................................................................................................... 1-1
Input/Output...................................................................................................................... 1-1
1.3 Specifications .................................................................................................................. 1-2
1.3.1 Input..................................................................................................................... 1-2
1.3.2 Output.................................................................................................................. 1-2
1.3.3 Front Panel Display.............................................................................................. 1-4
1.3.4 GPIB/RS-232 Readback....................................................................................... 1-5
1.4 Operational Panels .......................................................................................................... 1-6
1.4.1 The Front Panel .................................................................................................. 1-6
1.4.2 Rear Panel.......................................................................................................... 1-8
2INSTALLATION
2.1 Inspection........................................................................................................................ 2-1
2.2 Preparation for Use.......................................................................................................... 2-1
2.3 Requirements of Input Power........................................................................................... 2-1
2.3.1 Ratings................................................................................................................ 2-1
2.3.2 Input Connection................................................................................................. 2-2
2.4 Output Connection........................................................................................................... 2-3
2.5 Remote Sense Connection .............................................................................................. 2-3
2.6 Power-on Procedures ...................................................................................................... 2-4
2.7 I/O Connectors (Optional)................................................................................................ 2-5
3LOCAL OPERATION
3.1 Introduction...................................................................................................................... 3-1
3.2 Setup............................................................................................................................... 3-1
3.2.1 GPIB Address ......................................................................................................... 3-2
3.2.2 RS-232C................................................................................................................. 3-2
3.2.3 OVP........................................................................................................................ 3-3
3.2.4 Sound (ON/OFF)..................................................................................................... 3-3
3.2.5 System Test............................................................................................................ 3-4
3.2.6 Power On Status..................................................................................................... 3-5
3.2.7 Remote Sense (ON/OFF)........................................................................................ 3-5
3.3 Output Setting and Execution........................................................................................... 3-6
3.3.1 I Limit.................................................................................................................. 3-6
3.3.2 Range................................................................................................................. 3-6
3.3.3 Output V and F.................................................................................................... 3-7

iv
3.4 Save and Recall...............................................................................................................3-8
3.5 Data Lock.........................................................................................................................3-8
3.6 Ext Prog...........................................................................................................................3-9
3.7 Measurement.................................................................................................................3-10
3.7.1 Select Measurement Items .................................................................................3-10
3.7.2 Functions of Measurement..................................................................................3-10
3.8 Local Operation..............................................................................................................3-11
3.9 Protection..........................................................................................................................3-11
4THEORIES OF OPERATION3-
4.1 Introduction......................................................................................................................4-1
4.2 Description of Overall System...........................................................................................4-1
4.3 AC/DC Power Stage Converter ........................................................................................4-3
4.4 DC/DC Power Stage Converter........................................................................................4-3
4.5 DC/AC Inverter.................................................................................................................4-3
4.6 CPU.................................................................................................................................4-3
4.7 Measurement...................................................................................................................4-3
4.8 Sine Wave Generator.......................................................................................................4-4
4.9 Keyboard and Display ......................................................................................................4-4
4.10 GPIB/RS-232C/External Reference..................................................................................4-4
5SELF-TEST AND TROUBLESHOOTING
5.1 Introduction......................................................................................................................5-1
5.2 Self-Test Routine .............................................................................................................5-1
5.3 Troubleshooting ...............................................................................................................5-2
6REMOTE OPERATION
6.1 General Information..........................................................................................................6-1
6.2 GPIB Capability of the AC Source .....................................................................................6-2
6.3 Introduction to Programming ............................................................................................6-2
6.3.1 Conventions..........................................................................................................6-2
6.3.2 Numerical Data Formats.......................................................................................6-3
6.3.3 Boolean Data Format............................................................................................6-4
6.3.4 Character Data Format.........................................................................................6-4
6.3.5 Basic Definitions...................................................................................................6-4
6.4 Traversal of the Command Tree...........................................................................................6-5
6.5 Execution Order...................................................................................................................6-6
6.6 The Commands of the AC Source....................................................................................6-7
6.6.1 Command Tree Table..........................................................................................6-7
6.6.2 Command Dictionary ...........................................................................................6-9
6.7 Status Reporting ............................................................................................................6-21
6.7.1 Questionable Status...........................................................................................6-21
6.7.2 Standard Event Status.......................................................................................6-21
6.7.3 Status Byte Register..........................................................................................6-22
6.8 Error Messages..............................................................................................................6-23
APPENDIX: WIRE GAUGE SELECTION

1-1
1OVERVIEW
1.1 Introduction
The Elgar EW 3001 AC Power Source is a highly efficient AC Power Source providing sine
wave output of low distortion. The microprocessor-controlled sine wave oscillator generates
accurate and stable output voltage and frequency. The PWM (Pulse Width Modulation)
approach of the power stage provides full volt-ampere and current rating to loads. The EW
3001 supplies power up to 3000 VA.
The Elgar EW 3001 AC Power Source is considerably smaller, lighter and more efficient than
traditional power supplies with similar capability of outputting power.
This manual includes the specifications, installation procedures, operation and programming
instructions for the EW 3001 Power Source.
1.2 Features
Configuration
•Local operation through the keypad on front panel.
•Remote operation through GPIB or RS-232C interface.
•Protection against over power, over current, over temperature, under voltage,
fan failure, and open circuit.
•Temperature-controlled fan speed.
•Built-in output isolation relays.
Input/Output
•Selective full scale output: 150V/300V Auto.
•Remote control by analog voltage reference.
•Measurement of V, F, PF, CF, I, P.
•Programmable limit of output Irms.

EW 3001 Operation Manual
1-2
1.3 Specifications
The operational specifications of the Elgar EW 3001 are listed below. All specifications are
tested according to the standard Elgar test procedures.
All specifications are based on a full rated power resistive load at 25ºC ±1ºC specified
otherwise.
Maximum distortion applies from half range to full range of the selected output voltage range
with a resistive load.
1.3.1 Input
Parameter Units Value
Voltage Volts AC RMS 190-250, 1 Phase
Connector Type 3 pin Terminal Block
Power Factor N/A 0.98 minimum at nominal
input voltage (220-230VAC)
Current, Inrush Amperes, Peak 80 typical
Current Amperes RMS 23 maximum
Frequency Hz 47 to 63 minimum
Efficiency N/A 80% typical
1.3.2 Output
Parameter Units Value
Power, Reactive Volt amperes,
RMS 3000 minimum
Voltage Programming Range Volts RMS Range 1 - 1 maximum to
150 minimum,
Range 2 - 2 maximum to
300 minimum
Current Programming Range Amperes RMS Range 1 - 0 to 30
minimum,
Range 2 - 0 to 15 minimum
Voltage Programming Accuracy
(GPIB/RS-232/Front panel) Percent of full scale 0.2% maximum for
output ≤200 Hz,
0.4% maximum for
output >200 Hz

Overview
1-3
Parameter Units Value
Voltage Programming Resolution
(GPIB/RS-232/Front panel) Volts AC RMS 0.1 maximum
Voltage Programming Accuracy
(Analog) Percent of full scale 0.4%
Voltage Drift, excluding external
analog control Percent per degree Celsius 0.1% maximum
Inductive Output Impedance Mh 250 maximum
Resistive Output Impedance Ohms 0.25 maximum
Load Transient Recovery Seconds to 75%
of final value 0.5 maximum
Noise dB below full
scale 45 minimum (measured at 60Hz)
Distortion Percent THD 0.5% maximum for output
of ≤500Hz and linear load
1.0% maximum for output
of >500Hz and linear load
Line Voltage Regulation Percent 0.1% maximum of full scale
Load Voltage Regulation Percent 0.1% maximum of full scale
at point of sense
Current Crest Factor N/A 3.0 minimum for
output ≤100 Hz,
2.5 minimum for
output >100 Hz
Frequency Range Hz 45 to 1000 minimum
Frequency Drift ppm per ºC of
programmed
value
50 maximum
Frequency Programming Accuracy
(GPIB/RS-232/front panel) Percent of
programmed
value
0.1 maximum
Frequency Programming
Resolution
(GPIB/RS-232/front panel)
Hz 0.1 maximum

EW 3001 Operation Manual
1-4
1.3.3 Front Panel Display
Parameter Units Value
Output Voltage Accuracy N/A 0.3% of full scale + 0.2% of
reading maximum
Output Voltage Resolution Volts RMS 0.1 maximum
Output Current Accuracy N/A 0.3% of full scale + 0.5% of
reading maximum
Output Current Resolution Amperes RMS 0.01 maximum
Output Power Range Watts 0 to 3000 minimum
Output Power Accuracy percent of full
scale 2.5 maximum
Output Power Resolution Watts 0.1 maximum
Crest Factor Accuracy N/A 1% of full scale maximum for
output > 1500VA
Power Factor Accuracy N/A 1% of full scale maximum for
output 1500VA
Frequency Accuracy percent of
reading 0.25%

Overview
1-5
1.3.4 GPIB/RS-232 Readback
Parameter Units Value
Output Voltage Accuracy N/A 0.3% of full scale + 0.2%
of reading maximum
Output Voltage Resolution Volts RMS 0.1 maximum
Output Current Accuracy N/A 0.3% of full scale + 0.5%
of reading maximum
Output Current Resolution Amperes RMS 0.01 maximum
Output Power Range Watts 0 to 3000 minimum
Output Power Accuracy percent of full scale 2.5 maximum
Output Power Resolution Watts 0.1 maximum
Crest Factor Accuracy percent of reading 1 maximum with
output > 1500VA
Power Factor Accuracy percent of reading 1 maximum with
output > 1500VA
Frequency Accuracy percent of reading 0.25

EW 3001 Operation Manual
1-6
1.4 Operational Panels
1.4.1 The Front Panel
Figure 1-1 Front Panel
Item Symbol Description
1Alphanumeric LEDs: A row of red 7-segment LEDs display
setup messages and numeric settings or measurement results.
The display area is divided into three sections; values of V
appear on the left, frequency or I limit appears in the middle,
and any of I/P/PF/CF measurement values appear on the right.
2Indicator LEDs: LEDs located on the upper and lower part of
the display panel are the indicators showing the activated
status. These indicators include “VOLT”, “FREQ”, “I LIMIT”, “I”,
“P”, “PF”, “CF”, “LOCK”, “PROTECTION”, “EXT PROG”,
“RMT”, “150V”, “300V”, “AUTO”.
The “OUT” and “SHIFT” LEDs are located next to the
corresponding keys on the keypad. When illuminated, they
indicate activation of output and shift modes.

Overview
1-7
Item Symbol Description
3V/F
----- or -----
Ilimit
V/F or I limit selection key: In normal mode, this key allows
you to program either voltage or frequency. In shift mode, this
key allows you to program the rms (root mean square) limit on
the output current.
4I/P/PF/CF
----- or ------
LOCAL
I/P/PF/CF selection key: In normal mode, repeatedly press
this key to cycle through and select one of the measurement
values. In shift mode, this key returns control from the remote
PC to the front panel keypad.
5OUT/QUIT
----- or ------
EXT PROG
OUT/QUIT command key: In normal mode, press this key to
enable the EW to output power to the load. During setup
procedures, use this key to quit the current setup routine.
In shift mode, this key enables external programming.
6SHIFT Shift mode selection key: Press this key to switch the EW
from the normal operational mode to the shift mode, or from
shift back to normal.
71to 9,
0and Ÿ
----- or -----
F1 to F9 ,
LOCK , and
RANGE
Numeric and decimal keys: In normal mode, use these keys
to program numeric data. In shift mode, use the keys from 1
to 9to save data into or recall data from memory channels F1
to F9 respectively. Additionally, in shift mode, 0enables data
lock and configuration setup, and Ÿallows programming of the
full range of output voltage.
8ENTER Enter key: Press this key to confirm parameter settings.
9Rotary knob: Turn the rotary knob to input programming data
or select options.
10 Main Power Switch: Power on/off the EW 3001 by this switch.
Table 1-1 Front Panel Description

EW 3001 Operation Manual
1-8
1.4.2 Rear Panel
Figure 1-2 Rear Panel
Item Name Description
1Series No. Label Each set of the EW 3001 instruments has its own identification
number and input rating marked on this label.
2Output Terminal
Block Power line output is connected to the EW 3001 through this connector.
3Power Line Input
Terminal Block Power line input is connected to the EW 3001 through this connector.
4Cooling Fan Cooling fan speed automatically increases or decreases as
temperature rises or falls.
5Ext. V Ref. Control the output Vrms of the EW 3001 by external DC voltage
level. Such signal is input through this BNC connector.
NOTE: This connector is optional.
6GPIB Connector The interface allows the EW 3001 to communicate with the remote
GPIB controller. NOTE: This connector is optional.
7RS-232C
Connector This port located on the same GPIB optional board offers an
alternative interface to the EW 3001 for remote operation.
NOTE: This connector is optional.
Table 1-2 Rear Panel Description

2-1
2INSTALLATION
2.1 Inspection
When unpacking the instrument, inspect any damage that might have occurred during shipping.
Save all packing materials in case the unit has to be returned.
If any damage is found, please file a claim with the carrier immediately. Do not return the
instrument to the factory without prior RMA acceptance from Elgar.
2.2 Preparation for Use
Connect the instrument with an appropriate AC line input. Since it is intelligently fan-cooled, it
must be installed in sufficient space for the circulation of air. Operate the instrument in an area
where the ambient temperature is under 40ºC (104ºF).
2.3 Requirements of Input Power
2.3.1 Ratings
Input Voltage Range 190 ∼250 Vac, single phase
Input Frequency 47 ∼63 Hz
Max. Current 25A RMS
Max. power 4000 W
Fuse Information
FUSE REFERENCE
DESIGNATOR AND
LOCATION
FUSE FUNCTION FUSE RATING AND
TYPE INDICATION OF FUSE FAILURE
F1 located on “I”
(Input) PCB Assembly Main Input Power Fuse T25A/250V 13/32” Dia.
1 ½” Length
Low Line error with
proper input line
voltage
F1 located on “G”
(DC/DC) PCB
Assembly
DC Buss Fuse
Power Fuse T8A/250V 5mm Dia
20mm Length
Fails System Test or
cannot load output
F1 located on “M1”
(Mother) PCB
Assembly
DC Supply Fuse
Power Fuse T1A/250V 5mm Dia
20mm Length
No operation when
power switch is turned
ON
Note: For continued protection against fire hazard, replace only with the same type and rating of
fuse.

EW 3001 Operation Manual
2-2
2.3.2 Input Connection
The input power terminal block is located on the rear panel of the instrument. See Figure 2-1.
Input of the EW 3001 must be connected from a three-wired single phase AC power outlet.
The current rating of the power line input must be larger than or equal to that of the fuse of the
instrument. Refer to Appendix A Wire Gauge Selection for recommendations on appropriate
wire size.
WARNING! To protect operating personnel, the wire
connected to the GND terminal must be connected to
an earth ground. In no event shall this instrument be
operated without adequate ground connection.
Figure 2-1 Input Connection

Installation
2-3
2.4 Output Connection
Output power can be connected from the terminal block located on the rear panel of the
instrument through terminals L and N to the load as shown in Figure 2-2. For safety, the wires
to the load should be of a sufficiently large gauge to ensure that they do not overheat while
carrying the output current. Refer to Appendix A Wire Gauge Selection for recommendations on
appropriate wire size.
Figure 2-2 Output Connection
2.5 Remote Sense Connection
The remote sensing connection improves the voltage regulation by monitoring the voltage at the
load, not at the AC power source output terminal. Remote sensing allows the power supply to
increase the output voltage automatically, and compensate for the voltage drops in the load
leads. Note that with remote sensing, voltage read-back is at the load.
The instrument can be managed for remote voltage sensing by connecting the load leads from
the output terminals to the load, and the sensing leads from the terminals L and N to the load as
shown in Figure 2-2.

EW 3001 Operation Manual
2-4
2.6 Power-on Procedures
Apply the line power to the input terminals, and turn on the power switch on the front panel. No
load shall be connected to the output terminal block. The instrument will do a series of self-tests
whenever the user turns on the power switch. All LEDs on the front panel, including
alphanumeric and indicator LEDs, are lighted for three seconds or so. Then, the seven-
segment LEDs and alphanumeric LEDs will display “SELF TEST”. It means that the EW 3001 is
running a self-test.
Shortly afterwards, the seven-segment LEDs will display the model number, EW 3001, and the
firmware version number like shown below:
EW3001 ver 1.2
If any error is detected during the self-test, an error message will be displayed on the LED like
the following one:
ROM TEST ERR.
The following table defines all error messages and the recommended action:
Item Error Message Description Action
1ROM TEST ERR. System ROM test failure.
2RAM1 ERROR System RAM1 test failure.
3RAM2 ERROR System RAM2 test failure.
4WAVEFORM ERR. Waveform module test failure
5FRE. TEST ERR. Frequency module test failure
Consult your dealer
for assistance in
case of self-test
failure.
After the self-test is completed, the LEDs will show the current set values of V, F and the
measured value of I, and indicate that the EW 3001 is ready for use as below:
0.0 60.0 0.00
WARNING! Before the instrument is turned on, all
protective earth terminals, extension cords, and
devices connected to the instrument must be
connected to a protective earth ground. Any
interruption of the protective earth grounding will
cause a potential shock hazard.

Installation
2-5
2.7 I/O Connectors (Optional)
Figure 2-3 GPIB
Figure 2-4 RS-232C

EW 3001 Operation Manual
2-6
Figure 2-5 APG
Figure 2-6 Optional Board