Chroma 61704 User's Manual

Programmable AC Source

61701/61702/61703/61704

User’s Manual

Version 1.6

November 2015

Legal Notices

The information in this document is subject to change without notice. Chroma ATE INC. makes no warranty of any kind with regard to this manual, including, but

not limited to, the implied warranties of merchantability and fitness for a particular purpose. Chroma ATE INC. shall not be held liable for errors con tained herein or dir ect, indirect, special, incidental or consequential damages in connection with the furnishing, performance, or use of this material.

CHROMA ATE INC. 66 Huaya 1st Road, Guishan, Taoyuan 33383, Taiwan

Copyright Notices. Copyright 2002 - 2015 Chroma ATE INC., all rights reserved. Reproduction, adaptation, or translation of this document without prior written permission is prohibited, except as allowed under the copyright laws.

ii

Warranty

All of Chroma’s instruments are warranted against defects in material and workmanship for a period of one year from date of shipment. Chroma agrees to repair or replace any assembly or component found to be defective, under normal use during this period. Chroma’s obligation under this warranty is limited solely to repairing any such instrument, which in Chroma’s sole opinion proves to be defective within the scope of the warranty when returned to the factory or to an authorized service center. Purchaser is responsible for the shipping and cost of the service item to Chroma factory or service center. Shipment should not be made without prior authorization by Chroma.

This warranty does not apply to any p roduc ts rep aired o r al tered by persons not authorized by Chroma, or not in accordance with instructions furnished by Chroma. If the instrument is defective as a result of misuse, improper repair, or abnormal conditions or operations, repairs will be billed at cost.

Chroma assumes no responsibility for its product being used in a hazardous or dangerous manner either alone or in conjunction with other equipment. High voltage used in some instruments may be dangerous if misused. Special disclaimers apply to these instruments. Chroma assumes no liability for secondary charges or consequential damages and in any event, Chroma’s liability for breach of warranty under any contract or otherwise, shall not exceed the purchase price of the specific instrument shipped and against which a claim is made.

Any recommendations made by Chroma regarding the use of its products are based upon tests believed to be reliable; Chroma makes no warranty of the results to be obtained. This warranty is in lieu of all other warranties, expressed or implied, and no representative or person is authorized to represent or assume for Chroma any liability in connection with the sale of our products other than set forth herein.

CHROMA ATE INC.

66 Huaya 1st Road, Guishan, Taoyuan 33383, Taiwan Tel: 886-3-327-9999 Fax: 886-3-327-2886 e-mail: info@chromaate.com

http://www.chromaate.com

iii

Material Contents Declaration

Hazardous Substances

Lead

Mercury

Cadmium

Hexavalent

Polybrominated

Polybromodiphenyl

Pb

Hg

Cd

Cr6+

PBB

PBDE

“O” indicates that the level of the specified chemical substance is less than the threshold level specified in

“ specified in

The recycling label shown on the product indicates the Hazardous Substances contained in the product as the table listed below.

: See <Table 1>.

: See <Table 2>.

Part Name

PCBA

CHASSIS

ACCESSORY

PACKAGE

the standards of SJ/T-11363-2006 and EU 2005/618/EC.

” indicates that the level of the specified chemical substance exceeds the threshold level

the standards of SJ/T-11363-2006 and EU 2005/618/EC.

Disposal

Do not dispose of electrical appliances as unsorted municipal waste; use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being . W hen replacing old appliances with a new one, the retailer is legally obligated to take back your old appliances for disposal free of charge.

O O O O O O O O O O O O O O O O O O O O O O O O

Chromium

Biphenyls

Ethers

iv

Hazardous Substances

Lead

Mercury

Cadmium

Hexavalent

Polybrominated

Polybromodiphenyl

Pb

Hg

Cd

Cr6+

PBB

PBDE

“O” indicates that the level of the specified chemical substance is less than the threshold level specified in the standards of SJ/T

“ specified in the standards of SJ/T

1.

2. environment specified in each product’s specification.

Part Name

PCBA

CHASSIS 

ACCESSORY 

PACKAGE



O O O O O O

O O O O O O O O O O O O O O O

Chromium

Biphenyls

Ethers

-11363-2006 and EU 2005/618/EC.

” indicates that the level of the specified chemical substance exceeds the threshold level

-11363-2006 and EU 2005/618/EC.

Chroma is not fully transitioned to lead-free solder assembly at this moment; however,

most of the components used are RoHS compliant.

The environment-friendly usage period of the product is assumed under the operating

Disposal

Do not dispose of electrical appliances as unsorted municipal waste; use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substances can leak into the groundwater and get into the food chain, damaging your health and well-being . W hen replacing old appliances with a new one, the retailer is legally obligated to take back your old appliances for disposal free of charge.

v

vi

Safety Summary

environment of good ventilation.

Operating personnel must not remove the cover of the instrument.

connected to the output are touched when power is applied.

WARNING

The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument. Failure to comply with these precautions or specific WARNINGS given elsewhere in this manual will violate safety standards of design, manufacture, and intended use of the instrument. Chroma assumes no liability for the customer’s failure to comply with these requirements.

BEFORE APPLYING POWER

Verify that the power is set to match the rated input of this power supply.

PROTECTIVE GROUNDING

Make sure to connect the protective grounding to prevent an electric shock before turning on the power.

NECESSITY OF PROTECTIVE GROUNDING

Never cut off the internal or external protective grounding wire, or disconnect the wiring of protective grounding terminal. Doing so will cause a potential shock hazard that may bring injury to a person.

FUSES

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuse holders. To do so could cause a shock or fire hazard.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes. The instrument should be used in an

DO NOT REMOVE THE COVER OF THE INSTRUMENT

Component replacement and internal adjustment can be done only by qualified service personnel.

1. Lethal voltage. AC source may output 426 V peak voltage.

2. DEATH on contact may result if the output terminals or circuits

vii

Safety Symbols

The Notice sign highlights an essential operating or maintenance procedure, condition, or statement.

WARNING

CAUTION

DANGER – High voltage.

Explanation: To avoid injury, death of personnel, or damage to

the instrument, the operator must refer to the explanation in the instruction manual.

High temperature: This symbol indicates the temperature is hazardous to human beings. Do not touch it to avoid any personal injury.

Protective grounding terminal: This symbol indicates that the terminal must be connected to ground before operation of the equipment to protect against electrical shock in case of a fault.

Functional grounding: To identify an earth (ground) terminal in cases where the protective ground is not explicit ly st a ted. This symbol indicates the power connector does not provide grounding.

Frame or chassis: To identify a frame or chassis terminal.

Alternating Current (AC)

Direct Current (DC) / Alternating Current (AC)

Direct Current (DC)

Push-on/Push-off power switch

The WARNING sign highlights an essential operating or maintenance procedure, practice, condition, statement, etc., which if not strictly observed, could result in injury to, or death of, personnel or long term health hazards.

The CAUTION sign highlights an essential operating or maintenance procedure, practice, condition, statement, etc., which if not strictly observed, could result in damage to, or destruction of, equipment.

ACOUSTIC NOISE INFORMA TION

This product has a sound pressure emission (at the operator‘s side) < 65dB(A).

viii

Revision History

Date

Version

Revised Sections

Nov. 2002

1.0

Complete this manual

March 2004

1.1

Modify “Local Operation”

“Calibration”

“Remote Operation”

Add “Application”

“Appendix B Built-in Waveforms”

May 2005

1.2

Change the address and phone number of Chroma

Aug. 2007

1.3

Add

- “Material Contents Declaration”.

- “Notice” in the section of “OUTPUT RELAY”.

Modify the tables and figures in the section of “Appendix B: Built-in Waveforms”.

Mar. 2008

1.4

Modify DST17 in the section of “Appendix B Built-in Waveforms”.

May 2014

1.5

Add the word of Optional Function behind “3.6.3 WAVEFORM GENERATOR”.

Modify “Declaration of Conformity”.

Modify input voltage to 100-240Vac, 200-240Vac.

Nov. 2015

1.6

Add the section of “Rear Panel (with USB and Ethernet)” in the chapter of “General Information”.

The following lists the additions, deletions and modifications in this manual at each revision.

ix

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Table of Contents

1. General Information .............................................................................................. 1-1

1.1 Introduction ......................................................................................................... 1-1

1.2 Key Features ...................................................................................................... 1-1

1.3 Specifications ...................................................................................................... 1-1

1.4 Names of Parts ................................................................................................... 1-3

1.4.1 The Front Panel ....................................................................................... 1-3

1.4.2 The Rear Panel ....................................................................................... 1-5

1.4.3 Rear Panel (with USB and Ethernet) ....................................................... 1-6

2. Installation ............................................................................................................. 2-1

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

2.2 Preparation for the Use ....................................................................................... 2-1

2.3 Requirements of Input Power .............................................................................. 2-1

2.3.1 Ratings .................................................................................................... 2-1

2.3.2 Input Connection ..................................................................................... 2-1

2.4 Output Connection .............................................................................................. 2-3

2.5 Remote Sense Connection ................................................................................. 2-4

2.6 The Procedures of Power-on .............................................................................. 2-5

2.7 I/O Connectors (Option) ...................................................................................... 2-7

3. Local Operation .................................................................................................... 3-1

3.1 Introduction ......................................................................................................... 3-1

3.2 Operation through Keypad and RPG ................................................................... 3-1

3.3 MAIN PAGE (Output Setting and Measurement)................................................. 3-4

3.4 CHOICE PAGE (Functional List Choice) ............................................................. 3-5

3.5 SETUP Functional List ........................................................................................ 3-5

3.5.1 RANGE ................................................................................................... 3-6

3.5.2 Vac LIMIT ................................................................................................ 3-6

3.5.3 Vdc LIMIT (+), Vdc LIMIT (-) .................................................................... 3-7

3.5.4 I LIMIT, DELAY ....................................................................................... 3-7

3.5.5 OUTPUT RELAY ..................................................................................... 3-8

3.5.6 BUZZER .................................................................................................. 3-8

3.5.7 DATALOCK ............................................................................................. 3-9

3.5.8 Is START, Is INTERVAL .......................................................................... 3-9

3.6 CONF Functional List ........................................................................................ 3-10

3.6.1 REMOTE INHIBIT ................................................................................. 3-11

3.6.2 EXT. V, COUPLE (Reserved) ................................................................ 3-11

3.6.3 WAVEFORM GENERATOR (Optional Function) ................................... 3-12

3.6.4 GPIB Address, RS-232C ....................................................................... 3-13

3.6.5 POWER ON STATUS ........................................................................... 3-14

3.7 OUTPUT Functional List ................................................................................... 3-15

3.7.1 V_SET ................................................................................................... 3-15

3.7.2 Output Degree ....................................................................................... 3-16

3.7.3 Vdc Output ............................................................................................ 3-17

3.7.4 Phase Angle Setting .............................................................................. 3-18

3.7.5 Slew Rate of Output Transient ............................................................... 3-19

3.8 Save and Recall ................................................................................................ 3-20

3.8.1 Save and Recall Output Setting ............................................................. 3-20

xi

Programmable AC Source 61701/61702/61703/61704 User’s Manual

3.8.2

Save and Recall System Data ............................................................... 3-21

3.9 Protection.......................................................................................................... 3-22

4. Calibration ............................................................................................................. 4-1

4.1 Introduction ......................................................................................................... 4-1

4.2 MANUAL CALI Functional List ............................................................................ 4-1

4.2.1 Output Voltage and Voltage Measurement Calibration ............................ 4-3

4.2.2 Current Measurement Calibration ............................................................ 4-5

4.2.3 External Vref Calibration (Reserved) ....................................................... 4-6

4.2.4 Phase Angle Calibration .......................................................................... 4-7

5. Application ............................................................................................................ 5-1

5.1 General ............................................................................................................... 5-1

5.2 List Mode (Optional Function) ............................................................................. 5-1

SEQ = 0 DEGREE = 0.0 [Φ1] [ LIST ] ........................................ 5-4

5.3 Pulse Mode (Optional Function) .......................................................................... 5-5

5.4 Step Mode (Optional Function) ........................................................................... 5-8

5.5 Interharmonics Waveform (Optional Function) .................................................. 5-11

6. Theory of Operation .............................................................................................. 6-1

6.1 Description of Overall System ............................................................................. 6-1

6.2 Description of Power Transfer Unit...................................................................... 6-1

7. Self-test and Troubleshooting ............................................................................. 7-1

7.1 General ............................................................................................................... 7-1

7.2 Self-test .............................................................................................................. 7-1

7.3 Troubleshooting .................................................................................................. 7-2

8. Remote Operation ................................................................................................. 8-1

8.1 General Information ............................................................................................ 8-1

8.1.1 Setting the GPIB Address and RS-232C Parameters .............................. 8-1

8.1.2 Wire Connection of RS-232C .................................................................. 8-1

8.2 The GPIB Capability of the AC Source ................................................................ 8-2

8.3 Introduction to Programming ............................................................................... 8-3

8.3.1 Conventions ............................................................................................ 8-3

8.3.2 Numerical Data Formats .......................................................................... 8-3

8.3.3 Boolean Data Format .............................................................................. 8-3

8.3.4 Character Data Format ............................................................................ 8-3

8.3.5 Basic Definition ........................................................................................ 8-3

8.4 Traversal of the Command Tree ......................................................................... 8-5

8.5 The Execution Order ........................................................................................... 8-5

8.6 The Commands of the AC Source ...................................................................... 8-6

8.6.1 Common Command Dictionary ................................................................ 8-6

8.6.2 Instrument Command Dictionary ............................................................. 8-7

8.7 Command Summary ......................................................................................... 8-28

Appendix A Pin Assignment of TTL SIGNAL ........................................................... A-1

Appendix B Built-in Waveforms ................................................................................ B-1

xii

General Information

Model

61701

61702

61703

61704

AC OUTPUT RATING

Max. Power

1500 VA

3000 VA

4500 VA

6000 VA

Power per Phase

500 VA

1000 VA

1500 VA

2000 VA

Voltage

Range

150V / 300V

Output Votlage

0~150V/0~300V, 0~140V/0~280V@>1000Hz

Accuracy

0.2%+0.2%F.S.

0.1 V

Distortion

0.3% @50/60Hz

1. General Information

1.1 Introduction

The series of Chroma AC source 61701/61702/61703/61704 are high efficiency, 3-phase AC power source which provide sine wave output with low distortion, and accurate measurement of power. The DSP microprocessor generates accurate, stable output voltage and frequency. The PWM design of power stage allows for full volt-ampere into loads. The front panel has both RPG (rotary pulse generator) and keypad controls for setting the output voltage and frequency. The LCD provides a complete operating state of the unit to the user. Remote programming is accomplished either through the GPIB bus or the RS-232C serial port.

1.2 Key Features

A. Configuration

 Local operation from the keypad on the front panel.  Remote operation via GPIB or RS-232C interface.  Protection against Over-power, Over-Current, Over-temperature, Fan-fail.  Temperature-controlled fan speed.  Built-in output isolation relays.

B. Input/Output

 Selective output voltage with full scale of 150V/300V.  Universal of input voltage range 61701/61702: 100 ~ 240Vac, 61703/61704: 200 ~

240Vac.

 Measurement of V, I, P, CF, and PF.  Remotely inhibited control.  AC ON/OFF output signal.

1.3 Specifications

The operation specifications of the model 61701/61702/61703/61704 are listed below (on the next page). All specifications have been tested according to the standard Chroma test procedures. All specifications are based on a remote sense connection, 25 ± 1°C, and resistor load unless specified otherwise.

Resoluction

1-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

1.5%15- 1.2KHz

Line regulatoin

0.1%

Load regulation

0.2%

Temp. coefficient

0.02% per degree from 25°C

Max. current (per Phase)

r.m.s.

4A / 2A

8A / 4A

12A / 6A

16A / 8A

peak

24A / 12A

48A / 24A

72A / 36A

96A / 48A

Frequency

Range

DC, 15-1.2K Hz

Accuracy

0.15%

Phase

Range

0 ~ 360°

Resolution

0.3°

Accuracy

<0.8°@50/60Hz

DC OUTPUT RATING (per Phase)

Power

250W

500W

750W

1000 W

Voltage

212V / 424V

Current

2A / 1A

4A / 2A

6A / 3A

8A / 4A

INPUT 3-PHASE AC POWER (per Phase)

Voltage range

100-240V

200-240V

Frequency range

47-63 Hz

Current

9A Max .

16A Max.

10A Max.

14A Max.

Power Factor

0.97 Min.

0.98 Min.

MEASUREMENT

Voltage

Range

150V / 300V

Accuracy

0.2%+0.2%F.S.

Resolution

0.1 V

Current

Range (peak)

24A

48A

72A

96A

Accuracy (r.m.s.)

0.4%+0.3%F.S.

Accuracy (peak)

0.4%+0.6%F.S.

Resolution

0.01 A

Power

Accuracy

0.4%+0.4% F.S.

Resolution

0.1 W

Others

Efficiency

68 %

77 %

81 %

82 %

Size (W×H×D)

483 mm × 399 mm × 600 mm

Weight

74 Kg

75 Kg

Protection

UVP, OCP, OPP, OTP, FAN

Tempe rature range

Operation

0 °C to 40 °C

Storage

-40 °C to 85 °C

Humidity

30 % to 90 %

Safety & EMC

CE

Remarks *1 : Maximum distortion is tested on output 125VAC (150V RANGE) and 250VAC

(300V RANGE) with maximum current to linear load. *2 : Load regulation is tested with sinewave and remote sense. *3 : Efficiency is tested on input voltage 61701/61702 : 110V, 61703/61704 : 220V.

1-2

1.4 Names of Parts

PROGRAMMABLE AC SOURCE 61704

MODEL

1.4.1 The Front Panel

1

3

4

5

General Information

8

10

11

2

7

6

9

Figure 1-1 The Front Panel

1-3

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Item

Symbol

Description

Display: The LCD is to display configuration, output setup, and measurement results.

Indicator LED: "OUT" and "SHIFT", for showing activation keypad area next to the corresponding keys.

Cursor moving keys: These two keys are to move the

or

PAGE or EXIT command key: Pressing this key will make

CHOICE PAGE, the user can save system data (see 3.8).

Backspace and Minus command key: Pressing this key

data (see 3.8).

OUT/QUIT command key: Pressing this key may enable

the ac source output voltage or quit the output voltage.

Shift mode selection key: Pressing this key will switch the ac source from normal operational mode to the shift mode.

HELP

Numeric and decimal keys: The user can program

RPG: The user can input programming data or options by

turning the RPG to the desired ones.

11

Main power switch: It is to power on or off.

Table 1-1 The Description of the Front Panel

1

2

3

4

5

6 7

 

---------or--------

PAGE  PAGE 

PAGE/EXIT

---------or--------SAVE

 / -

----------or--------RECALL

OUT/QUIT

SHIFT

of output and shift mode, are available and located on the

cursor to different directions respectively. In normal mode, pressing any of these two keys will change the place of the cursor. Under shift mode, these keys enable the LCD display to change to last page or next page if there are   patterns in right-down side of display.

the LCD display switching between MAIN PAGE and CHOICE PAGE. Or change to CHOICE PAGE in each functional list. Under shift mode, pressing this key on

will erase the keyin number. Or it may show " - ", if no number is in front of cursor. Under shift mode, pressing the key on CHOICE PAGE, the user can recall system

0 to 9 , and •

8

------------or-----------

numeric data by pressing the digital keys and the decimal key.

ENTER

9

ENTER key: It is to confirm the setti ng of par ameters.

10

1-4

1.4.2 The Rear Panel

3

2

1

±10Vd.c./7.07Va.c.

EXT. VREF Max. INPUT

EXT. VREF

TTL SIGNAL

MADE IN TAIWAN

MODEL NO.:

ATE INC.

SERIAL NO.:

EXT. VREF

INPUT

R RTN

GND

R S

S NTTSN

380V

220V

Y

14A Max.47-63Hz

3PHASES

3PHASES 329-433V

190-250V

AC INPUT

5WIRES

4WIRES

a.c.( Line - Line )

Y

2/L1/L

N

OUTPUT

3/L

GND

300Va.c. Max. to GND

SENSE

21 N

3

2

3

General Information

4

5

8

7

6

1

9

Figure 1-2 The Rear Panel

1-5

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Item

Name

Description

1

Label

The label includes model number, serial number of the AC source.

The BNC connector inputs control waveform amplitude from external analog signal. (This function is reserved.)

The 9-pin, D-type female connector transfers control commands to and from the remote PC for remote operation.

A remote controller using GPIB bus is connected to the AC source through this connector for remote operation.

The 9-pin, female connector transfers control signals (fault_out,

6

Warning Label

Warning the leakage current.

7

Output Connector

This connector outputs power to the loading device.

It senses directly at the terminals of the load to eliminate any allowed.

Power Line in Connector

Power line input is connected to the AC source through this connector.

Item

Name

Description

1

Ext. Ref.

A BNC connector to control waveform amplitude via external analog (simulated).

2

USB

Connecting AC source and PC for communication.

3

IP Reset

Reset the IP address.

4

LAN

Connecting AC source and PC for network communication.

Table 1-2 The Description of the Rear Panel

2 Ext. Ref. 3 RS-232C 4 GPIB Connector

5 TTL SIGNAL

Remote Sense

8

Connector

9

remote inhibit, and AC_ON). (See Appendix A)

voltage drop on the connecting cable. Reverse polarity is not

1.4.3 Rear Panel (with USB and Ethernet)

Figure 1-3 Rear Panel (W ith USB & Ethernet)

Table 1-3 Description of the Rear Panel

1-6

Installation

The AC source will be damaged if it is operated at an input voltage that is outside its configured input range.

There are two different input voltage rating models. One is 380 V

3

).

Be careful to verify that what kind of the main voltage you have.

CAUTION

2. Installation

2.1 Inspection

After unpacking the instrument, please inspect any damage that may have occurred during the shipment. Save all packing materials in case the instrument has to be returned one day.

If any damage is found, please file a claim with the carrier immediately. Do not return the instrument to the factory without obtaining the prior RMA acceptance from Chroma.

2.2 Preparation for the Use

In the beginning, the instrument must be connected with an appropriate AC line input. Then, since fans intelligently cool it, it must be installed in sufficient space for circulation of air. It should be used in an area where the ambient temperature does not exceed 40°C.

2.3 Requirements of Input Power

2.3.1 Ratings

Input Votlage Range : 61701/61702 : 100 ~ 240 Vac, 3-phase 61703/61704 : 200 ~ 240 Vac, 3-phase Input Frequency : 47-63 Hz Input Max. Current : 61701 : 9 A (Per phase) 61702 : 16 A 61703 : 10 A 61704 : 14 A

2.3.2 Input Connection

The input terminal block is located on the rear panel of the instrument. The power cord must be a four or five conductor cord rated at least for 85°C. The power line input must have a current rating that is greater than or equal to the maximum current rating of the AC source. Do not use three separate wires to connect power to the AC source input.

phases with 5 wires (Y), and another is 220 V

3 phases with 4 wires (∆

LL

See Figure 2-1 (on the next page) and do the following things one by one:

2-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

AC source be operated without an adequate ground connection.

WARNING

INPUT

R

N

S

N

S

RT

T N

T

S

GND Y 380V

220V

INPUT

R R

T N

GND

R S

S N

T T

S N

380V

220V

Y

R S T N Ground

iron

R T S Ground

iron

1. Remove the safety cover from the back of the AC source.

2. Select the proper iron and screw the power cord to the input terminal blocks of the AC source (See Figure 2-1 and Figure 2-2)

3. Slip the safety cover over the ac input terminal strip, and secure the cover with four screws.

To protect the operators, the wire connected to the GND terminal must be connected to the earth ground. Under no circumstances shall this

Installation of the power cord must be done by a professional and in accordance with local electrical codes.

(Φ1/L) (Φ2/L) (Φ3/L) PE

Figure 2-1 380 3∼Y Input Connection

(Φ1/L) (Φ3/L) (Φ2/L) PE Figure 2-2 220 3∼∆ Input Connection

2-2

Installation

Output terminal labeled "L" is the "+" terminal, terminal labeled "N" is the "-" terminal when output voltage contains DC composition.

Figure 2-3 Input Terminal Safety Cover

2.4 Output Connection

The output terminal block is located in the rear of the AC source. Load connecting to the

“Φ1/L”, “Φ2/L”, “Φ3/L”, “N” and “G” are done at the output terminals. To meet the safety

requirements, the safety cover must be fasten. T he wires to the load must be sufficien tly large gauges, so they will not overheat while carrying the output current. Please see Figure 2-4.

2-3

Programmable AC Source 61701/61702/61703/61704 User’s Manual

300Va.c. Max. to GND

SENSE

2

1

N

3

Φ1/L Φ2/L Φ3/L N Ground

Figure 2-4 Output Terminal Connection

2.5 Remote Sense Connection

The remote sense function of the AC source monitors the voltage at the load instead at the output terminal of the AC source. It ensures the delivery of accurate voltage as programmed at the load by automatically compensating the output voltage drop over the connecting cable.

Connect the sensing leads as shown in Figure 2-5. Because the sensing leads carry only a few milliamperes, the wires for sensing are much lighter than the load leads. The sensing leads are part of the feedback path of the AC source, so they mus t be kept at a low resistance in order to maintain the best performance. Connect the sensing leads carefully so that they will not be open-circuited. If the sensing leads are left unconnected or become open-circuited during operation, the AC source will disable the output. The sensing leads must be a twisted pair to minimize the pickup of external noise. The sensing leads need to be connected to the load as close as possible.

2-4

Installation

personal injury.

WARNING

UUT

Figure 2-5 Output & Remote Sense Connection

2.6 The Procedures of P ower-on

Before turning on the instrument, 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 that could result in

Apply the line power and turn on the power switch on the front panel. The AC source will do a series of self-tests. The LCD on the front panel will light up and display as below:

Meanwhile, the AC source will do the memory, data and communication self-test. After the routines of the self-test be done, the display shows the MODEL number, and the serial number of the AC source, and it shows an “OK” at the right side of each test item indicating that the item is no problem. It takes about six seconds to complete the routines of the self-test. Then the display shows the versions of software as below.

Programmable AC Source

2-5

Programmable AC Source 61701/61702/61703/61704 User’s Manual

1. The user can do diagnosis if error or NG happens in power-on

suggested to turn on power after turning off.

1. SELF TEST

2. VERSION QUERY

3. OUTPUT TEST

If any failure is detected on a certain item, an “ERROR CODE” will be shown at the right side of that item. The error messages and trouble-shooting are shown on section 6.2 in this manual. The test item " REMOTE " shows < EMPTY>, if the option board (with GPIB and RS-232) is not connected.

After finishing memory, data and communication self-test, the AC source do the power output self-test. In this procedure, the output relays are in OFF status to sure not harming the load connecting on output terminal. The AC source will program 300Vac to each phase and measure the voltage. If the measured voltage is over 300V±5V, the power self-test is failed, and the display will show "NG". If it's ok, the display is shown as below. Then, it changes to MAIN PAGE automatically.

WAVEFORM1 OK PANEL OK WAVEFORM2 OK REMOTE OK WAVEFORM3 OK

WAVEFORM1 1.02 PANEL 1.02 WAVEFORM2 1.02 REMOTE 1.03 WAVEFORM3 1.02

WAVEFORM1 OK MODEL: 61704 WAVEFORM2 OK SERIAL NO.: 123456 WAVEFORM3 OK

2-6

self-test procedure. Please see section 6.2 in this manual.

2. The inner digital circuit of AC source may not be reset if turning off power and on immediately. Waiting more than 3 seconds is

2.7 I/O Connectors (Option)

Installation

Figure 2-6 Option Board

This option board is for remote control interface: GPIB and RS-232.

Figure 2-7 Option Board (with USB and Ethernet)

2-7

3. Local Operation

Vac1 = 0.0_ Vac2 = 0.0 Vac3 = 0.0

Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

Vac = 0.0_ H

PAGE CHOICE = 1_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

3.1 Introduction

The AC Source can be configured to operate in local or remote mode. The operation in remote mode through a remote GPIB controller or RS-232C is described in Chapter 8. In this section the operation in local mode via keypad on the front panel for d ata entry and test is described. The AC Source is configured for local operation when it is turned on.

3.2 Operation through Keypad and RPG

The AC Source provides users a friendly programming interface using the keypad and RPG (Rotary Pulse Generator) on the front panel. Each display of the LCD on the AC Source represents an operational menu.

The command tree is shown in Figure 3-1. Before explaining each menu, the following shows how to use keypad and RPG to set commands. When the power-on procedure is finished (see 2.6), the display will show MAIN PAGE as below.

If the parameter of V_SET of OUTPUT Functional list is INDIVIDUAL (see 3.7.1), the display will show MAIN PAGE as below.

Press ,  to move the cursor to choose an item. Use numeric and decimal keys or RPG to set the value, and then press ENTER to confirm. Users can press PAGE/EXIT to change to CHOICE PAGE as below. O r press PAGE/EXIT again to return to MAIN PAGE.

Freq = 60.00 Pt = 0.0 Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

H Freq = 60.00 Pt = 0.0 Vrms

Local Operation





3-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

MAIN PAGE (Output setting and measurement) PHASE1-2, PHASE1-3

Vdc LMT (+), Vdc LMT (-)

REMOTE INHIBIT

EXT. V, (reserved)

GPIB, RS-232

2. CONF

PAGE CHOICE

1. SETUP

RANGE

Vac LIMIT

I LIMIT, DELAY(s) BUZZER

OUTPUT RELAY

DATALOCK

Is START, Is INTERVAL

3. OUTPUT

V_SET

DEGREE, Vdc

Vs (V/ms), DCs (V/ms)

4. MANUAL CAL

V OUT AND MEAS.

I MEAS.

EXT V (reserved) POWER ON STATUS

PHASE CALI

PAGE CHOICE = 1_

2.CONF 3.OUTPUT 4. MANUAL CALI

If 61701/61702/61703/61704 includes optional function, the CHOICE PAGE shows as below.

In CHOICE PAGE, users can press numeric key then ENTER to choose the functional lists. After entering each functional list, press ,  to move the cursor to destination. If number expresses the settings, users can use numeric and decimal keys or RPG to set the value, then press ENTER t o confirm. If words express the settings, users can turn RPG to choose, then press ENTER to confirm.

If there are  or  patterns at the lower right of display, it means there are functional lists on previous page or next page. Users can press SHIFT then  or  to change page. When finished the setting, press PAGE/EXIT to return to CHOICE PAGE.

1. SETUP

5. LIST 6. PULSE 7. STEP

8. INTERHAR

3-2

Local Operation

6. PULSE

COUNT

Vac, F, Vdc

DUTY, PERIOD

TRIG, WAVE, DEGREE

7. STEP CO

COUNT, DWELL

Vac, F, Vdc

dV, dF, dDC

TRIG, WAVE, DEGREE

Ve, Fe, DCe (end)

COUNT, TRIG, BASE, COUPLE

SEQ, DEGREE

Vs, Fs, DCs (start)

5. LIST

WAVE, TIME/CYCLE

8. INTERHAR

Fi start, Fi end

LEVEL

TIME

EXE_MOD

Figure 3-1

3-3

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Vac

:

It is the AC composition of output voltage in Volts.

Freq

:

It is the output frequency in Hertz.

When Vdc is set (see 3.5.3), the output is the combination of Vac and Vdc.

condition.

Vac = 0.0_ H

Vac1 = 0.0_ Vac2 = 0.0 Vac3 = 0.0

Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

3.3 MAIN PAGE (Output Setting and Measurement)

When users turn on the AC Source, the display shows the MAIN PAGE after self-tests. The upper line of display shows the output settings. The state of default output settings can be set on POWER ON STATUS in CONF functional list (see 3.6.5). The lower lines show the measurements of AC Source output, see the following.

Freq = 50.00 Pt = 0.0 Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 I rms

Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

Press SHIFT, then  or  to change to next page as shown below.

If the parameter of V_SET of OUTPUT Functional list is INDIVIDUAL (see 3.7.1), the display will show MAIN PAGE as below.

On the upper right of display, the letter “L” shows the status of RANGE (see 3.5.1). Here lists the definition of letters:

L : 150V RANGE H : 300V RANGE

The definitions of output setting parameters are:

Freq = 50.00 Pt = 0.0 P Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 PF Φ1 = 0.000 Φ2 = 0.000 Φ3 = 0.000

H Freq = 50.00 Pt = 0.0 Vrms





However, the combination of peak voltage cannot exceed the limit of each range (150V RANGE: 212.1V, 300V RANGE: 424.2V). If it happens, the output voltage will quit to 0V automatically, and go to the protection

3-4

The definitions of measurement parameters are:

Pt

:

It is the measurement readings of total Power in Watts.

V

:

It is the measurement readings of Voltage in Volts. (True RMS measurement)

I

:

It is the measurement readings of Current in Amperes. (True RMS measurement)

Freq

:

It is the output frequency in Hertz.

P

:

It is the true Power measurement in Watts.

PF

:

It is the Power Factor, and its calculation formula = true power/ (Vrms × Irms)

CF

:

It is the Crest Factor, and its calculation formula = Ipeak/Irms.

Vdc

:

It is the DC composition measurement readings of Voltage in Volts.

Idc

:

It is the DC composition measurement readings of Current in Amperes.

Ip

:

It is the peak current measurement in Amperes.

Is

:

It is the I surge, and only measured from the occurrence of output transition as defined in 3.5.8.

VA

:

It is the Apparent Power in Watts, and its calculation formula = Vrms × Irms.

VAR

:

VA P

2

−

PAGE CHOICE = 1_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

PAGE CHOICE = 1_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

Local Operation

It is the calculation formula =

Press  or  t o move the cursor to the measurement column, and then use RPG to change the measurement items as desired.

3.4 CHOICE PAGE (Functional List Choice)

Users can press PAGE/EXIT to change to CHOICE PAGE from MAIN PAGE or functional list pages.

Users can press 1 - 8 to choose an operational list item, then press ENTER to confirm it. The display will switch to MAIN PAGE by pressing PAGE/EXIT on CHOICE PAGE.

5. LIST 6. PULSE 7. STEP

8. INTERHAR

3.5 SETUP Functional List

On CHOICE PAGE (see 3.4), press 1 then ENTER to choose the SETUP functional list.

5. LIST 6. PULSE 7. STEP

8. INTERHAR

3-5

Programmable AC Source 61701/61702/61703/61704 User’s Manual

The AC Source will set output voltage to 0V automatically if the output is

damaged. Please quit the output before change voltage range.

Vac LIMIT = 300

I LIMIT (A) = 0.0 DELAY (s) = 0.0



Is START = 0.0 ms

Is INTERVAL = 50.0 ms



Press SHIFT , then  to change to next page.

RANGE = 150V_ [ SETUP ]

Vdc LMT (+) = 424.2 Vdc LMT (-) = 0.0

BUZZER = ON OUTPUT RE L A Y = ON [ SETUP ] DATALOCK = OFF

3.5.1 RANGE

The AC Source supplies full range of output voltage with options of 150 V and 300 V for each phase. Users can set RANGE on SETUP functional list (see section 3.5). This parameter controls relays to parallel (150V RANGE) or series (300V RANGE) power stages to obtain more current or higher voltage.

To set the range of output voltage as 150V as below:

1. Move the cursor to the command line of RANGE. RANGE = 300V_

2. Turn the RPG to change the option from “300V” to “150V”, then press ENTER. RANGE = 150V

active when changes range. That can eliminate voltage spike when internal relays change status. It may cause the UUT to shut down or be

3.5.2 Vac LIMIT

The setting of Vac LIMIT will restrict the value of Vac in MAIN PAGE. Users can set Vac LIMIT on SETUP functional list (see section 3.5). This command is about user-programmable protection, not hardware protection.

The procedures for setting Current Vac LIMIT = 120V, are described as below:

1. Move the cursor to the command line

of “Va c LIMIT = ”. Vac LIMIT = 300.0_

3-6

Local Operation

The setting of Vac LIMIT is not restricted by RANGE, but the Vac on although Vac LIMIT= 200V, the largest value of Vac setting is 150V.

1. The setting of Vdc LIMIT is not restricted by RANGE, but the Vdc on

especially if the load has polar.

2. Press 1 , 2 , 0 then press ENTER

to change the value to “120.0”. Vac LIMIT(A) = 120.0

MAIN PAGE is restricted by RANGE. For example, in 150V RANGE,

3.5.3 Vdc LIMIT (+), Vdc LIMIT (-)

Vdc LIMIT (+) and Vdc LIMIT (-) limit the setting value of Vdc on MAIN PAGE. Users can set both on SETUP functional list (see section 3.5). The setting value of Vdc cannot be higher than Vdc LIMIT (+) or lower than Vdc LIMIT (-). Vdc LIMIT (+) must be positive or zero, while Vdc LIMIT (-) must be negative or zero. T his command is about user-programmable protection, not hardware protection.

The procedures of setting Vdc LMT (+)=200V, Vdc LMT (-)=-50V are described as below:

1. Move the cursor to the command line

of “Vdc LIMIT(+) = ”. Vdc LMT(+) = 424.2_ Vdc LMT(-) = 0. 0

2. Press 2 , 0 , 0 then press ENTER

to change the value to “200.0”. Vdc LMT(+) = 200.0 Vdc LMT(-) = 0.0_

3. The cursor moves to the command line

of “Vdc LIMIT(-) = ” automatically. Vdc LMT(+) =200.0 Vdc LMT(-) = -50_

4. Press  / - , 5 , 0 then press

ENTER to change the value to “-50.0”. Vdc LMT(+) = 200.0 Vdc LMT(-) = -50.0

MAIN PAGE is still restricted by RANGE. For example, in 150V RANGE, although Vdc LIMIT = 250V the largest value of Vdc setting is 212.1V.

2. When the AC Source output contains Vdc, it's better to restrict the value of Vdc. It may cause damage if output polarity is reversed,

3.5.4 I LIMIT, DELAY

Limitations of output RMS current and delay time are the parameters for triggering over current protection. The user can set both on SETUP functional list (see section 3.5). The discussion of limitation in this command is about user-programmable protection, not hardware protection.

3-7

Programmable AC Source 61701/61702/61703/61704 User’s Manual

1. When “I LIMIT (A) = 0” it means the limitation of output current is

resolution is 0.5s.

Before powering off, please confirm if the AC SOURCE is outputting to power off under outputting status.

The procedures of setting Current limit = 4A, Delay time = 1 sec., are described as below:

1. Move the cursor to the command line of “I LIMIT(A) = ”. I LIMIT(A) = 0.00_ DELAY(S) = 0.0

2. Press 4 , then press ENTER to change I LIMIT(A) = 4_ DELAY(S) = 0.0 the value to “4.00” .

3. The cursor moves to the command line

of “DELAY(S) = ” automatically. I LIMIT(A) = 4.00 DELAY(S) = 0.0_

4. Press 1 , ENTER to change the

value to “1. 0”. I LIMIT(A) = 4.00 DELAY(S) = 1.0_

equal to specification.

2. DELAY time is valid for eliminating transient current spike, but not work when the output current is over specification. T he time

3.5.5 OUTPUT RELAY

There are relays on the output of the AC Source for connecting the load. When the output relay is “ON”, it means it is closed in spite of the output status of the AC Source is in QUIT mode. When the output relay is “OFF”, it means it is closed only as the output status is in RUN mode. If the output status is in QUIT mode, the output relay will be opened. Users can set OUTPUT RELAY on SETUP functional list (see section 3.5).

To set the output relay to ON as below:

1. Move the cursor to the command of OUTPUT RELAY. OUTPUT RELAY=OFF_

2. Turn the RPG to set it to ON, then press ENTER. A click will sound from the AC Source when the OUTPUT RELAY= ON out put relay is activated.

voltage. For ensure the life of the AC SOURCE, it is prohibited strongly

3.5.6 BUZZER

The buzzer of the AC Source beeps when users press the keypad on the front panel or turn the RPG knob. It can be turned off if it does not need. Users can set BUZZER on SETUP functional list (see section 3.5).

To turn off the buzzer as follows:

3-8

Local Operation

Users must select OFF to unlock.

1. Move the cursor to the command line Buzzer of “Buzzer=”.

2. Turn the RPG to change the option from ON to OFF, then press ENTER. Buzzer = OFF

= ON_

3.5.7 DATALOCK

The AC Source allows users to lock data entries, so the pre-defined parameters can be protected from being modified by unauthorized personnel. Users can set DATALOCK on SETUP functional list (see section 3.5).

The procedures of the setting data lock are shown as below:

1. Move the cursor to the command line of “DATALOCK=”. DATALOCK = OFF_

2. Turn the RPG to change the option from OFF to ON, then press ENTER. DATALOCK = ON

3.5.8 Is START, Is INTERVAL

Is is the surge peak current of AC Source output shown in MAIN PAGE. The AC Source will wait Is START time then start to measure Is before the output voltage transition. The length of measurement time is Is INTERVAL. Users can set both on SETUP functional list (see section 3.5).

The procedures of setting Is START=10ms, Is INTERVAL = 200 ms, are described as below:

1. Move the cursor to the command line of “Is START = ”. Is START= 0.0_ ms

2. Press 1 , 0 t hen press ENTER to change the value to “10.0”. Is START = 10.0 ms

3. The cursor moves to the command line of “Is INTERVAL = ” automatically. Is INTERVAL = 50.0_ m s

4. Press 2 , 0 , 0 then press ENTER to change the value to “200.0”. Is INTERVAL = 200.0_ ms

3-9

Programmable AC Source 61701/61702/61703/61704 User’s Manual

POWER ON STATUS : [ CONF

Vdc = 0.0 

REMOTE INHIBIT= OFF [ CONF ] GPIB ADD= 30 BAUD= 19200

WAVEB[Φ1]= SINE



WAVEA[Φ2]= SINE

WAVEB[Φ3]= SINE



REMOTE INHIBIT= OFF [ CONF ]

BAUD= 19200

WAVEB[Φ1] = CSIN MODE= THD PER= 0.0 %

WAVEA[Φ2]= CSIN MODE= THD PER= 0.0 %

WAVEB[Φ3]= CSIN MODE= THD PER= 0.0 %



1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

3.6 CONF Functional List

On CHOICE PAGE (see section 3.4), press 2 then ENTER to choose the CONF functional list.

Press SHIFT, then  to change to next page.

PAGE CHOICE = 2_

5. LIST 6. PULSE 7. STEP

8. INTERHAR

WAVEA[Φ1]= SINE

GPIB ADD= 30

WAVEA[Φ1] = CSIN MODE= THD PER= 0.0 %

WAVEB[Φ2]= SINE WAVEA[Φ3]= SINE

WAVEB[Φ2]= CSIN MODE= THD PER= 0.0 %

WAVEA[Φ3]= CSIN MODE= THD PER= 0.0 %

Output = OFF Freq = 60.00

Vac = 0.0





]

3-10

Local Operation

The remote inhibit is a TTL signal transferred via the special I/O connector. For details please refer to the pin assignment in Appendix A.

3.6.1 REMOTE INHIB I T

The output of the AC Source can be inhibited by the external control or by manual trigger. The remote inhibit signal is received from 9-pin female connector on the rear panel (see Appendix A). Users can set REMOTE INHIBIT on CONF functional list (see section 3.6). There are three states for remote inhibit: OFF, LIVE, and TRIG.

OFF: It disables the feature of remote inhibit. LIVE: The output of the AC Source will be disabled if TTL signal is LOW, but will be

recovered automatically if TTL signal is HIGH.

TRIG: The output of the AC Source will be disabled i f TTL signal is LO W, and wi ll remain in

quit state even TTL signal becomes HIGH.

The procedures of setting from OFF to LIVE are shown as below:

1. Move the cursor to the command of "REMOTE INHIBIT" to set inhibition by the TTL signal from REMOTE INHIBIT =OFF _ the external control.

2. Turn the RPG to change the option from OFF to REMOTE INHIBIT =LIVE LIVE, then press ENTER.

3.6.2 EXT. V, COUPLE (Reserved)

The AC Source allows users to make use of the controlled analog signal from external devices for setting its output. The three BNC connectors of the EXT Vref on the rear panel lets users apply signal to the AC Source for setting the 3-phase output voltage. Users can set EXT. V and COUPLE on CONF functional list (see section 3.6). There are two coupling modes to present the AC Source output from external V reference: AC_AMPLIFIER and DC_LEVEL_CTL.

AC_AMPLIFIER: The output voltage (Vout) is the synthesis of voltage programming on MAIN

PAGE and the amplification of external V reference with voltage range from

-10V to 10V. When Vac=0 and Vdc=0 on MAIN PAGE, Vout can be calculated using the following formula:

Vout (dc) = Vref (dc) / 10 Vdc × 424.2 Vdc (300V RANGE) Vout (dc) = Vref (dc) / 10 Vdc × 212.1 Vdc (150V RANGE)

or

Vout (ac) = Vref (ac) / 7.072 Vac × 300 Vac (300V RANGE) Vout (ac) = Vref (ac) / 7.072 Vac × 150 Vac (150V RANGE)

Example (1): set Vout to 100Vdc:

1. Select RANGE = 300V in SETUP functional list, apply external V= 2.357Vdc, the Vout = 100Vdc.

2. Select RANGE = 150V in SETUP functional list, apply external V= 4.715Vdc, the Vout = 100Vdc.

3-11

Programmable AC Source 61701/61702/61703/61704 User’s Manual

: The output voltage (Vout (ac)) responses linearly proportional to the

When EXT. V=ON, COUPLE=DC_LEVEL_CTL, the output v oltage (Vout)

EXT.V=OFF again.

1. When COUPLE = AC_AMPLIFIER and the frequency of Vref is over

frequency composition.

WARNING

Example (2): set Vout to 100Vac:

1. Select RANGE = 300V in SETUP functional list, apply external V= 2.357Vac, the Vout = 100Vac.

2. Select RANGE = 150V in SETUP functional list, apply external V= 4.715Vac, the Vout = 100Vac.

DC_LEVEL_CTL

Example (1): set Vout to 100Vac:

1. Select RANGE = 300V in SETUP functional list, apply external V= 3.333Vdc (or

-3.333Vdc), the Vout = 100Vac.

2. Select RANGE = 150V in SETUP functional list, apply external V=6.667Vdc (or

-6.667Vdc), the Vout = 100Vac.

The procedures of setting EXT. V = ON, COUPLE = DC_LEVEL_CTL, are described as below:

1. Move the cursor to the command

of “EXT. V = ”. EXT.V = OFF_ COUPLE=AC_AMPLIFIER

2. Turn the RPG to change the option

from OFF to ON, then press ENTER. EXT.V = ON COUPLE=AC_AMPLIFIER_

3. The cursor moves to the command

line of “ COUPLE = ” automatically. EXT.V = ON COUPLE=DC_LEVEL_CTL

4. Turn the RPG to select DC_LEVEL_

CTL, then press ENTER. EXT.V = ON COUPLE=DC_LEVEL_CTL_

controlled DC level with voltage range from -10V to 10V. Vout can be calculated using the following formula: Vout (ac) = Vref (dc) / 10 Vdc × 300Vac (300V RANGE) Vout (ac ) = Vref (dc) / 10 Vdc × 150Vac (150V RANGE)

will respond to the external control DC voltage level only. Users cannot control Vout amplitude through the keypad on the front panel, until

1200Hz, it might cause the AC Source be damaged. The formula should be followed the if F>1200Hz: Vref (pk-pk, V) × F ( Vref, Hz) < 10000 VHz.

2. Because of the bandwidth limitation of AC Source, the output may be distorted. Especially when external V reference consists of high

3.6.3 WAVEFORM GENERATOR (Optional Function)

The AC Source provides users with two independent sets of waveforms, A and B in each

3-12

Local Operation

1. The clipped sine is programmed by “AMPlitude” or “Total Harmonic

3. For detailed of factory DST waveform refer to Appendix B.

1. When using user -defined waveform, if the waveform frequency is

frequency composition.

WARNING

phase. Both of the waveforms contain sinusoidal, square, clipped sinusoidal, 30 sets of built-in waveforms, and 6 sets of user-defined waveforms.

To set Φ1 waveform A as square wave:

1. Move the cursor to the command of WAVEA[Φ1]. WAVEA[Φ1]= SINE_

2. Turn the RPG to change the option to “SQR”, then press ENTER . WAVEA[Φ1]=SQR_

To set Φ1 waveform B as clipped Sin wave, THD: 10 %

1. Move the cursor to command of WAVE B, WAVEB[Φ1]=CSIN_ choose “CSIN”.

2. Then, LCD display shows the MODE and MODE = AMP_ PER = 0.0 % PERCENT.

3. Turn the RPG to change the option to “THD”,

press ENTER . MODE = THD PER = 0.0_ %

4. Press 1 , 0 t hen press ENTER to set

THD to 10%. MODE = THD PER = 10.0 %

Distortion”. Programming ranges from 0 to 100% for amplitude (100%: no clipped sine), and from 0 to 43% for THD (0%: no distortion).

2. User-defined waveform is defined on a remote PC and downloaded from it.

over 1000Hz, it might cause the AC Source be damaged.

2. Because of the bandwidth limitation of AC Source, the output may be distorted. Especially when external V reference consists of high

3.6.4 GPIB Address, RS -232C

The AC Source offers the mode of remote operation too. Users can set them on CONF functional list (see 3.6). For details please refer to Chapter 8. Prior to remote operation users have to set the GPIB address 10 as below:

1. Move the cursor to the command ADDR = 30_ line of GPIB address.

2. Press 1 , 0 , ENTER to set address 10. ADDR = 10

3-13

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Address ranges from 1 to 30.

The options of baud rate are 9600/19200. The options of parity are EVEN/ODD/NONE.

The AC Source offers another remote operation through the RS-232C bus. Communication protocol is set as follows:

To set parity=ODD, baud rate=19200.

1. Move the cursor to the command PARITY= NONE_ BAUD=9600 line of PARITY.

2. Turn the RPG to select ODD, then press ENTER. PARITY=ODD BAUD=9600_

3. The cursor moves automatically to t he posit ion of “BAUD”. Turn the RPG t o select "19200", then press PARITY=ODD BAUD=19200 ENTER.

3.6.5 POWER ON STATUS

The AC Source allows users to set the output state when the power is switched on. Users can set POWER ON STATUS on CONF functional list (see section 3.6). After setting, users should save them before powering off (see section 3.8.2). Users also can pre-set voltage of each phase individually if V_SET = INDIVIDUAL (see section 3.7.1).

To set the output to ON, 230 Vac, 50Hz and 0Vdc when power-on.

1. Move the cursor to the line of “POWER POWER ON STATUS: Output = OFF_ ON STATUS : Outp ut =”.

2. Turn the RPG to set output ON, then POWER ON ST ATUS: Output = ON press ENTER.

3. Press 2 , 3 , 0 , ENTER to set Vac = 230.0 Freq=60.0_ Vdc = 10.0 Vac=230.

4. Press 5 , 0 , then press ENTER to Vac = 230.0 Freq=50.0 Vdc = 10.0 set Freq=50.

5. Press 0 , then press ENTER to set Vac = 230.0 Freq=50.0 Vdc = 0.0 Vdc = 0.

3-14

Local Operation



PAGE CHOICE = 3_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

V_SET= ALL [ OUTP ] DEG ON= 0.0 DEG OFF= IMMED

W_F= A



V_SET= INDIVIDUAL [ OUTP ] DEG ON= 0.0 DEG OFF= IMMED

W_FΦ1=A W_FΦ2=A W_FΦ3=A

3.7 OUTPUT Functional List

On CHOICE PAGE (see 3.4), press 3 and ENTER to choose the OUTPUT functional list.

Press SHIFT, then  to change to next page.

5. LIST 6. PULSE 7. STEP

8. INTERHAR

Vdc= 0.0

Vdc1= 0.0 Vdc2= 0.0 Vdc3= 0.0



[OUTP]

Phase 1-2 = 120.0 Phase 1-3 = 240.0

Vs (V/ms) = 0.000 DCs (V/ms) = 0.000

3.7.1 V_SET

There are three AC Source output setting modes: ALL, ALL_DELTA and INDIVIDUAL. Users can set V_SET on OUTPUT functional list (see 3.7) to fit the application. Then, the MAIN PAGE will change corresponding to the mode.

If V_SET = ALL, the voltage settings of 3-phase output are all the same. The MAIN PAGE is as below.

3-15

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Vac = 0.0_ H

Vac1 = 0.0_ Vac2 = 0.0 Vac3 = 0.0 H

Freq = 50.00 Pt = 0.0 P Φ1 = 0.0 Φ2 = 0.0 Φ3 = 0.0 PF Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

 

If V_SET = ALL_DELTA, the voltage settings of 3-phase output are all the same. But the real output voltage between Line and Neutral is the setting value divide into √ 3 . This is for 3-wire connecting 3-phase AC power. For example, the output voltage between Line and Neutral is 127V when set Vac = 220. But if the phase difference of each is 120° and 240°, the voltage between Line and Line is 220V.

If V_SET = INDIVIDUAL, the voltage settings of 3-phase output can be set individually. The MAIN PAGE is as below.

Freq = 50.00 Pt = 0.0 Vrms Φ1 = 0.0 Φ2 = 0.0 Φ3 = 0.0



The procedures of setting from ALL to INDIVIDUAL are shown as below:

1. Move the cursor to the command of “V_SET=”. COUPLE = ALL_

2. Turn the RPG to change the option from ALL to INDIVIDUAL, then press ENTER. COUPLE= INDIVIDUAL

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



3.7.2 Output Degree

The AC Source can control the transition angle of the waveform when it is out or quits. Users can set DEG ON and DEG OFF to achieve it in OUTPUT functional list (see 3.7.)

The procedures for setting output phase angle DEGREE ON = 90 and OFF=180 are described as below:

1. Move the cursor to the command line DEG ON = 0.0_ DEG OFF= IMMED of “ON = ”.

2. Press 9 , 0 , then ENTER to DEG ON = 90.0 DEG OFF= IMMED_ change the value to "90.0".

3. The cursor moves to the command line of “OFF= ” automatically.

4. Press 1 , 8 , 0 , then press DEG ON = 90.0 DEG OFF= 180.0 ENTER to change the value to "180.0".

3-16

Local Operation

1. The output or quit phase angle of waveform is set for Phase 1 (Φ1).

the set degree. Keyin “OFF= 360” became “OFF= IMMED”.

The DC mode of AC Source is applied to do some voltage tests. The

connector.

Chroma 61700 AC source have AC/DC/AC+DC output function, at DC

output unstable and damage AC source.

WARNING

The other phases will follow Phase 1 to out or quit at the same time.

2. If "OFF=IMMED", the output voltage quits immediately when users press

QUIT. But if the degree is set, the output voltage will last till

3.7.3 Vdc Output

The AC Source can program output voltage that contains DC component by setting Vdc on OUTPUT functional list (see 3.7). Users can also set DC component of each phase individually if V_SET = INDIVIDUAL (see 3.7.1).

The procedures of setting Vdc = 2V are described as below:

1. Move the cursor to the command line of “Vdc = ”. Vdc = 0.0_

2. Press 2 , then press ENTER t o change the value to “2.0”. Vdc = 2.0

AC Source does not have such many output capacitors, some features like voltage ripple and load transient are not as good as DC Source. But it can supply positive and negative DC voltage without changing output

output part, it’s still different from really DC source, the reason as below,

1. The big ripple noise at DC output, it is because of AC source does not have output capacitor.

2. The AC source output relay will switch off when the current over the specification, it will cause output voltage interruption.

P.S. Normally the DC source will change to C.C. mode, then the output voltage slow down to 0V.

3. Another major reason is, it cannot accept add/increase large capacitor, more than 20uF at output side directly. It may cause

3-17

Programmable AC Source 61701/61702/61703/61704 User’s Manual

L

Bridge diode

High frequency

C

Resistor for discharger

SW

61700 AC SOURCE

Output

DC input

Fixture Board

+

_

For solving above weak point, we suggest that add a special fixture for sure and protection.

Illustration for fixture:

1. Bridge diode: Because of internal control circuit of AC source, if users connect more than 20uF capacitor at output side, it may cause output unstable. It’s better to use bridge diode for isolating external capacitor. Also, it could prevent from wrong connection for polarity of output DC level. But, it will cause 1.6V drop when adds the bridge diode. (The user can compensate the output DC voltage by setting voltage level. For example, the user can program 11.6V in order to get 10 V on the output of fixture board.)

2. L and high frequency capacitor: They can filter high frequency ripple and noise. But it’s not necessary if doesn’t care ripple noise.

3. C and SW: It could switch off if UUT part already has capacitor.

4. Discharger resistor and SW: It could discharge the capacitor for avoiding remnant voltage to hit user when output off. But, users need to consider about power consumption, the discharger resistor power should be enough for it.

capacitor

3.7.4 Phase Angle Setting

For a 3-phase AC power system, the phase angle in between is 120°. The AC Source of 61700 can program the phase angle 0~360°, not fix to 120° only. Users can set PHASE 1-2 and PHASE 1-3 to achieve it in OUTPUT functional list (see 3.7). The parameter of PHASE 1-2 means the phase angle between Phase 1 (Φ1/L) and Phase 2 (Φ2/L).

3-18

Local Operation

Users cannot connect Φ1/L, Φ2/L, Φ3/L terminals of AC Source outputs together, even the PHASE 1-2 = 0 and PHASE 1-3 = 0 are set.

1. When users set Vs (V/ms)=0, DCs (V/ms)=0, the output transient is in

rate, 0V must be keyin then press ENTER.

The procedures of setting a balance phase angle are described as below:

1. The cursor moves to the command line

of “PHASE 1-2=” . PHASE 1-2=0.0 PHASE 1-3 =0.0

2. Press 1 , 2 , 0 , then press ENTER.

PHASE 1-2=120.0 PHASE 1-3 =0.0_

3. The cursor moves to the command line

of “PHASE 1-3=” automatically.

4. Press 2 , 4 , 0 , then press ENTER. PHASE 1-2=120.0 PHASE 1-3 =240.0_

3.7.5 Slew Rate of Output Transient

The AC Source can control the transition waveform of the output by setting Vs and DCs on OUTPUT functional list (see 3.7). Users can use Vs (V/ms) and DCs (V/ms) two commands to achieve the transient state of output waveform.

Vs: the slew rate of output Vac DCs: the slew rate of output Vdc. When users change the output setting in MAIN PAGE, the output voltage will change

corresponding to the Vs, DCs commands. The procedures of setting Vs (V/ms)=0.2 and DCs (V/ms)=0.1 are described as below:

1. Move the cursor to the command line

of “Vs (V/ms) = ”. Vs (V/ms) = 0.000_

2. Press 0 , . , 2 , then press ENTER

to change the value to “0.2”. Vs (V/ms) = 0.200

3. The cursor moves to the command line

of “DCs (V/ms)=” automatically. Press DCs (V/ms) = 0.100_ 0 , . , 1 , then press ENTER.

the fastest speed.

2. Vs and DCs have large input range in software programming, but the output may not follow the slew rate exactly when Vs and DCs are too large.

3. When users press OUT or Quit, the output voltage will change immediately. If users want to out or quit the output with the set slew

3-19

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Vac3= 0.0 Vdc3= 0.0 F=60.00

Vac3= 100.0 Vdc3= 20.0 F=60.00

Vac1 = 0.0_ Vac2 = 0.0 Vac3 = 0.0 H

3.8 Save and Recall

The AC Source offers two modes for the user to save and recall output setting or system data. They are described in 3.8.1 and 3.8.2.

3.8.1 Save and Recall Output Setting

The AC Source offers nine channels for users to save a set of frequently used Vac, F, Vdc, and to recall them for future use.

Under the MAIN PAGE:

Freq = 60.00 Pt = 0.0 Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

Press SHIFT then PAGE/EXIT to run the SAVE function. The display will show as below:

Users can press 1 - 9 to select a channel, then press ENTER to save the output setting. Press PAGE/EXIT to return to MAIN PAGE.

Recalling from memory channel to MAIN PAGE is shown as follows. In MAIN PAGE, press

SHIFT then  / - to run the RECALL function. The display appears as below:

Users can press 1 - 9 to select a channel, then press ENTER to recall the output setting. Afterward the display returns to MAIN PAGE automatically.

If the recalled settings are out of RANGE or over the V LIMIT (see 3.5.2, 3.5.3), the display will show the following:

CHOICE 1-9, PRESS <ENTER> TO SAVE 1_ Vac1= 0.0 Vdc1= 0.0 Vac2= 0.0 Vdc2= 0.0

CHOICE 1-9, PRESS <ENTER> TO RECALL 1_ Vac1= 100.0 Vdc1= 20.0 Vac2= 100.0 Vdc2= 20.0

Conflicting with RANGE or V LIMIT





3-20

Press <ENTER> key to Exit

Local Operation

1. The function to save and recall output settings is for MAIN PAGE

defined to Vac1, Vdc1.



3 ) : 1_

PAGE CHOICE = 1_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

3.8.2 Save and Recall System Data

The AC Source offers three memory groups for users to save the system data and to recall them for later use. The system data contain all parameters in function lists such as measurement settings, SETUP (see 3.5), CONF (see 3.6) and OUTPUT (see 3.7). In the CHOICE PAGE (see 3.4 displays are shown as below.

Press 1 - 3 to choose the group to save, then press ENTER to confirm. The display will show the saving status message about three seconds as below.

Then, press PAGE/EXIT to return to CHOICE PAGE. Recalling the system data from memory group is shown as follows. In CHOICE PAGE,

press

SHIFT then

5. LIST 6. PULSE 7. STEP

settings only. Other parameters are ignored.

2. If V_SET=ALL (see 3.7.1), the re call set tings f or MAIN PAGE are

), press SHIFT and PAGE/EXIT to run the SAVE function. The

8. INTERHAR

Save all parameters to Group ( 1 -

Saving now, do not shut down ........

/ - to run the RECALL function. The display appears as below:

Recall parameters of Group ( 1 -

3-21

Programmable AC Source 61701/61702/61703/61704 User’s Manual

The AC Source provides three memory groups: 1, 2, and 3. The memory

again. Those saved in other memory groups must be recalled manually.

Protection

Description

It occurs when the output current is over the I limit or the current specification.

OVER POWER

It occurs when the output power is over the specification.

1. It is the feedback for open protection, which means the

RANGE. See 3.3.

Protection

Description

FAN FAIL

Ths fan failure protection that indicates the cooling fan is malfunction.

INT - AD

The inner AD power stage (see 5.1) protection that indicates the output voltage is over or under the specific value.

INT - DD

The inner DD power stage (see 5.1) protection that indicates the output voltage is over or under the specific value.

OUTPUT SHO RT

The short protection that indicates the output terminals are shorted.

INPUT FAIL

The power failure protection that indicates the line input voltage is lower or higher than specification.

OVER TEMP

The over temperature protection, which is enabled when the internal temperature of the AC Source is too high.

Press 1 - 3 to choose a group to recall, then press ENTER to confirm. Then, the display will return to CHOICE PAGE after the data is loaded.

group 1 keeps the power-on defaults. The setup data saved to memory group 1 will be recalled automatically when the AC Source is powered on

3.9 Protection

The AC Source provides protections for software and hardware. When a protection happens, the AC Source will quit the output and turn off the output relays, then show the type of protection on the LCD display. If any protection is triggered to hold the normal output, remove the errors and press operation.

Protections for software are listed as below:

ENTER to unlock the protection so as to resume the normal

OVER CURRENT

OUTPUT OVP

Protections for hardware are listed as below:

feedback loop is broken or the output voltage goes wrong.

2. It occurs when the output voltage is over the limit of each

3-22

Calibration

AC Source

Load

Current

Voltage

+5V DC L N

+ - + -

4. Calibration

4.1 Introduction

The AC Source built a simple way to calibrate the 3-phase ou tput and measurement accuracy without opening the cover. Users can do it for each phase following the procedures step by step. A voltage meter, current meter, suitable load and +5V DC Source are needed during calibration. Please refer to Figure 4-1 for the connections of these instruments. There are three items need to calibrate. But it is not necessary to calibrate all of them at once. Users can choose one item only as need.

Meter

Source

Meter

Figure 4-1

4.2 MANUAL CALI Functional List

Users can choose “4. MANUAL CALI” in CHOICE PAGE to enter the calibration procedure. Before showing the calibration items, users must enter a password for safety reason. The password is shown in this manual, in order to confirm the users read the manual before performing the calibration.

4-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

1. The password to enter the calibration procedure is " 7377 ", then

operation.

Enter Password : _

PAGE CHOICE = 4_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

4. PHASE

5. LIST 6. PULSE 7. STEP

8. INTERHAR

( You can get password in user's manual ! )

Enter Password : * * * *

( You can get password in user's manual ! )

After entered the correct Password, the display shows PHASE CHOICE PAGE.

Choose the phase to calibrate, the display shows CALIBRATION CHOICE PAGE.

V OUT AND MEAS.: output voltage and voltage measurement accuracy calibration. I MEAS.: current measurement accuracy calibration. EXT Vref.: external Vref calibration.

PHASE CHOICE = 1_

1. PHASE 1 2. PHASE 2 3. PHASE 3 CALI

CALIBRATION CHOICE = 1_

1. V OUT AND MEAS. 2. I MEAS.

3. EXT Vref.

press ENTER.

2. Before calibrating the AC Source, users should read the procedures in detail. Or it may lose some data in memory because of improper

4-2

Calibration

1. The Vdc offset may be positive or negative. The positive of DVM

CALI.

Vac = 0.00 V Vdc = 0.00 V

Please Remove Load Before Calibrating

Press <ENTER> to start

4.2.1 Output Voltage and Voltage Measurement Calibration

On CALIBRATION CHOICE page, pre s s 1 , ENTER to do the output voltage and voltage measurement calibration.

In the step A of V OUT AND MEAS. ACCURACY CALI, users should enter the AC Source's DC output voltage measured by digital voltage meter (DVM) in mV. Then, monitor the reading of DVM, keyin the DC output voltage repeatedly until DC output is less than ±10 mV.

CALIBRATION CHOICE = 1

1. V OUT AND MEAS. 2. I MEAS.

3. EXT V.

1. V OUT AND MEAS. ACCURACY CALI 1 5 0 V RNG A. KEYIN THE MEASURED Vdc Vdc offset = _ mV



Then press SHIFT, then  to change to next step.

In the step B of V OUT AND MEAS. ACCURACY CALI, the display shows the offset of Vac and Vdc measured by AC Source. They are produced by internal components. Wait two

1. V OUT AND MEAS. ACCURACY CALI 1 5 0 V RNG B. WAIT TWO SECONDS THEN ( ENTER )

connects to the line of AC Source output, and the negative of DVM connects to the Neutral of AC Source output. See

2. The load must be off at all steps of V OUT AND MEAS. ACCURACY

Figure 4-1.



4-3

Programmable AC Source 61701/61702/61703/61704 User’s Manual

The AC Source calibration steps can be done individually, but it is B ...). Or it may cause output and measurement errors.

1. Users can press PAGE/EXIT to exit to the calibration choice page at anytime.

seconds then press ENTER, then set Vac = 0.00 and Vdc = 0.00.

suggested to follow the calibration procedure step by step (step A, step



Press

In the above step C of V OUT AND MEAS. ACCURACY CALI, users should not turn on the load. Press step is to make sure the connection is correct.

Then go to step D. Press 150VAC. Keyin the exact value measured by DVM, then press

Press

In the above step E of V OUT AND MEAS. ACCURACY CALI, users should not turn on the load. Press is to make sure the connection is correct.

Then go to step F. Press ENTER and check if the output voltage measured by DVM is 300VAC. Keyin the exact value measured by DVM, then press ENTER.

Step F is the final step of V OUT AND MEAS. ACCURACY CALI. Press PAGE/EXIT to exit that page. Then display will show as below. Press ENTER to save the calibration results.

, then

SHIFT

1. V OUT AND MEAS. ACCURACY CALI 150V RNG C. ( ENTER ) THEN CHECK OUTPUT IS 15VA C D. ( ENTER ) THEN KEYIN DVM MEAS. 150V A C 

0.00_ V 

ENTER

, then

SHIFT

1. V OUT AND MEAS. ACCURACY CALI 300V RNG E. ( ENTER ) THEN CHECK OUTPUT IS 30V A C F. ( ENTER ) THEN KEYIN DVM MEAS. 300VA C

0.00_ V 

ENTER and check if the output voltage measured by DVM i s 30VAC. This step

Press ( ENTER ) to save . Press ( PAGE/ EXIT ) not t o save .

to change to next step.

then check if the output voltage measured by DVM is 15VAC. This

ENTER



to change to next step.

and check if the output voltage measured by DVM is

ENTER

.

4-4

Calibration

2. See the above display, if PAGE/EXIT is pressed without saving the result, the calibration result still works till turning off the power.

Model

Step B.

Step C.

61701 (500 VA)

0.4 A

4 A

61702 (1000 VA)

0.8 A

8 A

61703 (1500 VA)

1.2 A

12 A

61704 (2000 VA)

1.6 A

16 A

4.2.2 Current Measurement Calibration

On CALIBRATION CHOICE page, press 2 , ENTER to do the current measurement calibration.

In the above step A of CURRENT MEAS. ACCURACY CALI, the display shows the offset of Iac and Idc measured by AC Source. They are produced by internal components. Wait two seconds to press

Press SHIFT, then  to change to next step.

In above step B of CURRENT MEAS. ACCURACY CALI., pr ess ENTER then AC source will output 12.5VAC. The user should apply suitable load to output, to make the output current measured by current meter (or power analyzer) be about 1.6A (for 61704). The different model shows different current value in display. If the output current is ok after applying load, press step B, 16A. Keyin the exact value of current measured by current meter. The output current of step B. and step C. are shown as below:

ENTER, then AC source will output 125VAC. The output current will be 10 times of

CALIBRATION CHOICE = 2

1. V OUT AND MEAS. 2. I MEAS.

3. EXT Vref.

1. CURRENT MEAS. ACCURACY CALI 150V RNG A. WAIT TWO SECONDS THEN ( ENTER )

Iac = 0.00 A Idc = 0.00 A 

ENTER, then Iac = 0.00A, Idc = 0.00A.

1. CURRENT MEAS. ACCURACY CAL I 150V RNG B. ( ENTER ) THEN CHECK CURRENT IS 1.6 A C. ( ENTER ) THEN KEYIN CURRENT MEAS. 16 A

0.00 A 

4-5

Programmable AC Source 61701/61702/61703/61704 User’s Manual

1. The resistance of applied load must be constant, so that the load

unsuitable load.

Vdc = 0.00 V

Please Remove Load Before Calibrating

Press <ENTER> to start

Step C is the final step of CURRENT MEAS. ACCURACY CALI . Press PAGE/EXIT to exit that page. The display will show as below. Press ENTER to save the calibration result.

Press ( ENTER ) to save . Press ( PAGE/EXIT ) not to save .

current is proportional to output voltage. If not, the step B of CURRENT MEAS. ACCURACY will be insignificant. Us ers only need to meet the current of step C when output voltage is 125VAC.

2. When performing the calibration, the protection is removed temporarily. It may cause damage to AC source if applying

4.2.3 External Vref Calibration (Reserved)

On CALIBRATION CHOICE page, pre s s 3 , ENTER to do the external Vref calibration. See the details below.

CALIBRATION CHOICE = 3

In the step A of EXTERNAL Vref CALI., short the ex ternal Vref input terminal to make input 0V, then the display shows the measured Vdc from AC Source. They are offset voltages produced

1. V OUT AND MEAS. 2. I MEAS.

3. EXT Vref.

3. EXTERNAL Vref CALI 150V RANGE A. Vref INPUT SHORT WAIT TWO SECONDS THE N ( ENTE R )

4-6

Calibration

Please Remove Load Before Calibrating!

ENTER> to start

0.000_ VDC ( ENTER )



PAGE CHOICE = 1_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

by internal components. Wait two seconds to press ENTER, then Vdc = 0V. Press SHIFT, then  to change to next step.

3. EXTERNAL Vref CALI 150V RANGE

In the step B of EXTERNAL Vref CALI, users apply +5Vdc to Vref BNC connector from outer DC source. Check if the output voltage of AC Source is 106Vdc, then keyin the exact value of input Vref voltage (not AC Source output) measured from DVM.

Step B is the final step of EXTERNAL Vref CALI. Pre s s PAGE/EXIT to exit that page. Then display will show as below. Press ENTER to save the calibration result.

B. INPUT EXT. V 5VDC - WAIT TWO SECOND KEYIN EXT. V DVM MEAS.

Press ( ENTER ) to save . Press ( PAGE/EXIT ) not to save .

4.2.4 Phase Angle Calibration

In order to get better accuracy of phase angle among each output voltage, especially at high frequency, 61700 Series AC Sources allow users to calibrate it. Select 4 to go to phase offset calibration at PHASE CHOICE PAGE (see 4.2).

Confirm no load is connected and then press ENTER to select phase offset calibration.

5. LIST 6. PULSE 7. STEP

Press <

8. INTERHAR

4-7

Programmable AC Source 61701/61702/61703/61704 User’s Manual

1. The output is 50Vac/400Hz in this calibration procedure. In order to

want get better accuracy.

L12Dly= 00.0 us and L13Dly= 00.0 us are for reference only. Step A: Measure the voltage between Φ1/L to N for 50VAC, then keyin the exact value Step B: Measure the voltage between Φ2/L to N for 50VAC, then keyin the exact value Step C: Measure the voltage between Φ3/L to N for 50VAC, then keyin the exact value Step D: Measure the voltage between Φ1/L toΦ2/L for 86.6VAC, then keyin the exact value Step E: Measure the voltage between Φ1/L toΦ3/L for 86.6VAC, then keyin the exact value

Phase offset calibration is finished after the above steps are done. Press PAGE/EXIT to exit this page.

4. PHASE OFFSET CALI. L12Dly= 00.0 us L13Dly= 00.0 us Vac1=0.00_ Vac2=0.00 Vac3=0.00 L12=0.000 L13=0.000

measured by DVM to Vac1 and press measured by DVM to Vac2 and press measured by DVM to Vac3 and press measured by DVM to L12 and press measured by DVM to L13 and press

ENTER. ENTER.

ENTER. ENTER. ENTER.

get an accuracy result, please use a high performance DVM such as Agilent 34401A.

2. The calibration result will keep until powering off the AC Source. Because the phase angle error is different at every time when powering on the AC Source, users must calibrate every time if they

4-8

Application

PAGE CHOICE = 5_

COUPLE =Φ1+Φ2+Φ3 [ LIST ] TRIG = AUTO BASE = TIME

< S HIFT> <ENTER> to Execute

TRIG = AUTO BASE = TIME

<SHIFT> <ENTER> to Execute

5. Application

5.1 General

Not only programming the steady sine output voltage and frequency, the AC Source also provides several powerful functions to simulate all kinds of power line disturbances. Users can make the output change through a number of value in LIST mode (see 5.2), or make the output change to its set value for a specific period of time in PULSE mode (see 5.3), even make the output change to its set value step by step in STEP mode (see 5.4). With these functions, it is easy to simulate cycle dropout, transient spike, brown out, and etc.

Not only measurements related to power in MAIN PAGE (see 3.3), the AC Source also can achieve interharmonics waveform, a sweeping frequency superimposed on a static fundamental wave (see 5.5).

5.2 List Mode (Optional Function)

On CHOICE PAGE (see 3.4), press 5 and ENTER to choose the LIST functional list.

The waveform programming of LIST mode is the assembly of the SEQuences. The output waveform will start from SEQ=0, then SEQ by SEQ. The execution will stop until a SEQ which TIME or CYCLE = 0, even the following SEQs had been set will not be executed.

COUPLE = INDIVIDUAL/Φ1+Φ2+Φ3: It sets the output function to individual or dependent mode (Φ1+Φ2+Φ3).

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

5. LIST 6. PULSE 7. STEP

8. INTERHAR

COUNT: 0

COUPLE = INDIVIDUAL EDIT = Φ1 [ LIST ]

COUNT: Φ1 = 0 Φ2 = 0 Φ3 = 0

5-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

SEQ = 0 DEGREE = 0.0 [Φ1] [ LIST ]

WAVE = A TIME = 0.0 ms

0.0 [Φ1] [ LIST ]

WAVE = A TIME = 0.0 ms

SEQ = 0 [Φ2] [ LIST ]

WAVE = A TIME = 0.0 ms

1 DEGREE = 0.0 [Φ2] [ LIST ]

WAVE = A TIME = 0.0 ms

TRIG = AU TO/MANUAL: It sets the way to trigger. AUTO: It will finish all COUNT number when triggered. There is only one-way setting when the couple is set individual. MANUAL: It will execute sequence waveform for once only. The phase needs to set toΦ1+Φ2+Φ3. It has the same result in COUNT=1.

COUNT: It sets the whole number of times for executing sequences. COUNT = 0: infinity. The source can set each phase count number in individual mode. Otherwise, it sets Φ1+Φ2+Φ3 for the same count.

BASE = TIME / CYCLE: It sets the unit of sequence length. Press SHIFT, the n  to change to next page for sequence programming.

Vs = 0.0 Fs = 60.00 DCs = 0.0 Ve = 0.0 Fe = 60.00 DCe = 0.0

SEQ = 1 DEGREE = Vs = 0.0 Fs = 60.00 DCs = 0.0 Ve = 0.0 Fe = 60.00 DCe = 0.0

Vs = 0.0 Fs = 60.00 DCs = 0.0 Ve = 0.0 Fe = 60.00 DCe = 0.0













SEQ = Vs = 0.0 Fs = 60.00 DCs = 0.0 Ve = 0.0 Fe = 60.00 DCe = 0.0

5-2





Application

= 0 [Φ3] [ LIST ]

WAVE = A TIME = 0.0 ms

= 1 DEGREE = 0.0 [Φ3] [ LIST ]

WAVE = A TIME = 0.0 ms

_TRIG_ON * STOP * [ LIST ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



_TRIG_OFF * RUNNING * [ LIST ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

SEQ: the number of sequence. All sequences must start with zero. The maximal number of DEGREE: the phase angle when the sequence starts.

Vs, Fs, DCs: the initial waveform when the sequence starts. Ve, Fe, DCe: the final waveform when the sequence ends. WAVE = A / B: the waveform selection (see 3.6.3). TIME / CYCLE: the length of sequence.

After setting sequences, press PAGE/EXIT to exit to LIST mode page. Press SHIFT and

ENTER to change to execution page. The LCD shows _TRIG_ON is under action, and *

STOP * is the triggering status at present. Pr ess ENTER to trigger. Then the LCD shows status * RUNNING * and TRIG_OFF that is w aiting for users to stop the LI ST w aveform output. The LCD shows * STOP * when the AC Source executed all sequences and COUNT.

SEQ Vs = 0.0 Fs = 60.00 DCs = 0.0 Ve = 0.0 Fe = 60.00 DCe = 0.0

SEQ is 99.

 





Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00





5-3

Programmable AC Source 61701/61702/61703/61704 User’s Manual

P Φ1 = 0.000 Φ2 = 0.000 Φ3 = 0.000 

_TRIG_OFF * RUNNING * [ LIST ]

CF Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 

COUPLE =Φ1+Φ2+Φ3 [ LIST ] TRIG = AUTO BASE = TIME

< S HIFT> <ENTER> to Execute

SEQ = 0 DEGREE = 0.0 [Φ1]

Ve =80.0 Fe = 50.00 DCe = 0.0

SEQ = 1 DEGREE = 0.0 [Φ1] [ LIST ]

WAVE = A TIME = 80.0 ms

On the other hand, Shift Up/Shift Down can be used to choose the desired measurement.

If the AC Source is running, press OUT/QUIT the output will quit waveform to zero voltage. Press OUT/QUIT again, the AC Source only outputs the waveform set in MAIN PAGE. Users must press ENTER to trigger it again. If in quit state, users can press ENTER to output LIST waveform directly.

The programmed LIST mode waveform will shut down when PAGE/EXIT is pressed to exit LIST execution page.

LIST mode example:

_TRIG_OFF * RUNNING * [ LIST ]

Freq Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



PF Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



COUNT=1

[ LIST ]

Vs =20.0 Fs = 50.00 DCs = 0.0

Vs = 20.0 Fs = 50.00 DCs = 0.0 Ve = 80.0 Fe = 50.00 DCe =100.0

5-4

 

Application

PAGE CHOICE = 6_

COUNT=0 [ PULSE ]

<SHIFT> <ENTER> to Execute 

SEQ = 2 DEGREE = 0.0 [Φ1] [ LIST ]

WAVE = A TIME = 100.0 ms

The output waveform :

SEQ 0

SEQ 1

SEQ 2 90°

75ms

100ms

50V

Vs = 20.0 Fs = 50.00 DCs = 0.0 Ve = 100.0 Fe = 50.00 DCe =0.0

 

5.3 Pulse Mode (Optional Function)

On CHOICE PAGE (see 3.4), press 6 and ENTER to choose the PULSE functional list.

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

5. LIST 6. PULSE 7. STEP

8. INTERHAR

Vac = 0.0 F = 60.00 Vdc= 0.0 DUTY = 0.0 % PERIOD = 0.1 ms

5-5

Programmable AC Source 61701/61702/61703/61704 User’s Manual

TRIG= AUTO WAVE = A [PULSE]

<SHIFT> <ENTER> to Execute 

_TRIG_ON * STOP * [ PULSE ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

Press SHIFT and  to change to next page.

The PULSE mode allows users to program a particular waveform (Φ1+Φ2+Φ3) attach to

normal output set in MAIN PAGE. The waveform programming is to specify the duty percentage on top of the programmed output and the transient state.

COUNT: the repeat number of pulse. Vac, F, Vdc: the Vac, F and DC output in the duty of period. DUTY: the proportion of pulse in one period. PERIOD: the length of a pulse period. TRIG = AUTO / MANUAL: the way to trigger. AUTO: It will finish all COUNT number when

triggered. MANUAL: It will execute pulse waveform for once only. It has the same result in COUNT=1. WAVE = A / B: the waveform selection (see 3.6.3). DEGREE _Φ1: the output phase angle of Master pulse.

Press SHIFT and ENTER to go to PULSE execution page. The LCD shows _TRIG_ON is under action, and * STOP * is the triggering state at present. Press ENTER to trigger it. Then LCD shows * RUNNING * and TRIG_OFF that is waiting for users to stop the PULSE waveform output. The LCD shows * STOP * when the AC Source executed all COUNT number.

The source can use Shift Up/Shift Down to choose the desired measurement.

DEGREE_Φ1= 0.0

Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

_TRIG_OFF * RUNNING * [ PULSE ]

Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



5-6

Application

_TRIG_OFF * RUNNING * [ PULSE ]

P Φ1 = 0.000 Φ2 = 0.000 Φ3 = 0.000 

_TRIG_OFF * RUNNING * [ PULSE ]

CF Φ1 = 0.000 Φ2 = 0.000 Φ3 = 0.000 

COUNT=3 [ PULSE ]

<SHIFT> <ENTER> to Execute 

<SHIFT> <ENTER> to Execute 

If the AC Source is in output state, press OUT/QUIT the output will quit waveform to zero voltage. If press OUT/QUIT again, the AC Source only outputs the waveform set in MAIN PAGE. Users must press ENTER to trigger it again. If in quit state, users can pres s ENTER to output PULSE waveform directly.

The pulse wave will shut down when PAGE/EXIT is pressed to exit PULSE execution page. PULSE mode example:

F Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

PF Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

Vac = 100.0 F = 50.00 Vdc= 0.0 DUTY = 35.0 % PERIOD = 100.0 ms

TRIG= AUTO WAVE= A [PULSE] DEGREE_Φ1= 0.0



5-7

Programmable AC Source 61701/61702/61703/61704 User’s Manual

PAGE CHOICE = 7_

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

COUNT = 0 DWELL = 0.1 ms [ STEP ]

< SHIFT> <E NTE R> to Execute

The output waveform: 90°

Pulse 1

Pulse 2

Pulse 3

35ms

65ms

100ms

50V

5.4 Step Mode (Optional Function)

The STEP mode offers an easy and automatic change function to change output waveform in a regular level and time. But the variation between two steps changes rapidly, not gradually. The waveform programming is to set an ini tial waveform, specify the dwell time and change of each step, and the number of change step. After execution, the output wave will keep at the last step.

On CHOICE PAGE (see 3.4

5. LIST 6. PULSE 7. STEP 8. INTERHAR

Vac = 0.0 F = 60.00 Vdc = 0.0 dV = 0.0 dF = 0.00 dDC = 0.0

), press 7 and ENTER to choose the STEP functional list.



5-8

TRIG= AUTO WAVE = A [STEP]

<S HIFT> <ENTER> to Execute 

_TRIG_ON * STOP * [ STEP ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 

_TRIG_OFF * RUNNING * [ STEP ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



* PAUSE * [ STEP ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



COUNT: the number of each change execution. DWELL: the length of each step. Vac, F, Vdc: the initial value of Vac, F, DC when STEP mode starts to execute. dV, dF, dDC: the difference value of each step. (The negative value is allowed.) TRIG = AUTO/MANUAL: the way to trigger. AUTO: It will finish all COUNT number when

triggered. MANUAL: The output waveform will change one step for each execution.

WAVE = A/B: the waveform selection (see 3.6.3). DEGREE:

Press SHIFT and ENTER to go to STEP execution page. The LCD shows _TRIG_ON is under action, and * STOP * is the triggering state at present. Press ENTER to trigger it. Then LCD shows * RUNNING * and TRIG_OFF and TRIG_PAUSE. Press  or  to move the cursor and press ENTER to select it. TRIG_OFF is to stop the STEP waveform from changing. TRIG_PAUSE is to keep the STEP waveform until TRIG_CONTINUE is selected. The LCD shows * STOP * when the AC Source executed all COUNT.

The source can use Shift Up/Shift Down to choose the desired measurement.

DEGREE_Φ1 = 0.0

the output phase angle of each step.

Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

TRIG_PAUSE Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

_TRIG_OFF TRIG_CONTINUE Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

Application



5-9

Programmable AC Source 61701/61702/61703/61704 User’s Manual

_TRIG_OFF * RUNNING * [ STEP ]

P Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

_TRIG_UP * STOP * [ STEP ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



_TRIG_OFF * RUNNING * [ STEP ]

CF Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



COUNT = 3 DWELL = 60.0 ms [ STEP ] Vac = 40.0 F = 50.00 Vdc = 0.0 dV = 10.0 dF = 50.00 dDC = 20.0 <SHIFT> <E NTE R> to Execute

TRIG= AUTO WAVE = A [STEP]

<SHIFT> <E NTER> t o Execute 

If the AC Source is in output state, press OUT/QUIT the output will quit waveform to zero voltage. If press OUT/QUIT again, the AC Source only outputs the waveform set in MAIN PAGE. Users must press ENTER to trigger it again. If in quit state, users can press ENTER to output STEP waveform directly.

TRIG_PAUSE F Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

TRIG_PAUSE PF Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

 



The STEP wave will stop executing when PAGE/EXIT is pressed to exit STEP execution page. When TRIG = MANUAL, the LCD shows TRIG_UP and TRIG_DOWN. The output waveform will change to the next step if TRIG_UP is selected. If TRIG_DOWN is selected the output waveform will change back to the last step.

STEP mode example:

TRIG_DOWN Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

DEGREE_Φ1 = 0.0





5-10

Application

PAGE CHOICE = 8_

EXE_MODE= Φ1+Φ2+Φ3 [ INTERHAR ]

Fi_end= 2400.0 Hz

TIME= 0.01 sec

<SHIFT> <ENTER> to Execute

60ms

Initial

Step 1

Step 2

Step 3

40Vac 50Hz

50Vac 100Hz

60Vac 150Hz

70Vac 200Hz 50V

90°

0Vdc

20Vdc

40Vdc

60Vdc

5.5 Interharmonics Waveform (Optional Function)

On CHOICE PA GE (se e 3.4 ), p ress 8 and ENTER to choose the INTERHAR functional list.

For some tests, the AC Source offers a sweeping frequency, with a small magnitude level, that can superimpose on original fundamental output in INTERHAR function. The following figures are the examples.

1. SETUP 2.CONF 3.OUTPUT 4. MANUAL CALI

5. LIST 6. PULSE 7. STEP 8. INTERHAR

Fi_start= 0.01 Hz LEVEL= 0.0 %

5-11

Programmable AC Source 61701/61702/61703/61704 User’s Manual

_TRIG_ON * STOP * [ INTERHAR ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



_TRIG_OFF * RUNNING * [ INTERHAR ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



EXE_MODE = Φ1+ Φ2 + Φ3/Φ1/Φ2/Φ3: It sets the output phase. There are 4 modes for

selection.

Fi_start: the starting frequency of the sweeping wave. The range is 0.01Hz ~ 2400Hz. Fi_end: the ending frequency of the sweeping wave. T he range is 0.01Hz ~ 2400Hz. LEVEL: the r.m.s. magnitude of the sweeping wave in percentage of fundamental voltage set

in MAIN PAGE.

TIME: the time interval from Fi_start to Fi_end. Press SHIFT and ENTER to go to INTERHAR execution page. The LCD shows _TRIG_ON

is under action, and * STOP * is the triggering state at present. Fi is the sweeping frequency. (Fi=0 means no sweeping wave superimpose on original fundamental output.) Press to trigger it. Then LCD shows * RUNNING * and TRIG_OFF and TRIG_PAUSE. Press  or  to move the cursor and press ENTER to select it. TRIG_OFF is to stop the INTERHAR waveform. TRIG_PAUSE is to pause the INTERHAR waveform at certain frequency. T he frequency will continue to sweep when users move the cursor to TRIG_CONTINUE and press

ENTER. The LCD shows * FINISH * when the sweeping frequency reaches to Fi_end.

Fi = 0.00

Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

ENTER



5-12

TRIG_PAUSE Fi = 0.00 Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



Application

For practical use and to protect the power stage of AC Source, the

If 1000Hz < Fi_start or Fi_end < 2400Hz, LEVEL < 10%.

_TRIG_OFF * PAUSE * [ INTERHAR ]

I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



If the AC Source is in output state, press OUT/QUIT the output will quit to zero voltage. If press OUT/QUIT again, the AC Source only outputs the waveform set in MAIN PAGE. Users must press ENTER to trigger it again. If in quit state, users can press ENTER t o output interharmonics waveform directly.

The INTERHAR waveform will shut down when PAGE/EXIT is pressed to exit INTERHAR execution page.

TRIG_CONTINUE Fi = 0.00 Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00



LEVEL has to be restricted to Fi_start and Fi_end: If 0.01Hz < Fi_start or Fi_end < 500Hz, LEVEL < 30%.

If 500Hz < Fi_start or Fi_end < 1000Hz, LEVEL < 20%.

5-13

Theory of Operation

Φ1 POWER MODULE

Φ2 POWER MODULE

Φ3 POWER MODULE

A

K

LCD Display Key

E

GPIB

RS-232

Input Power

Output Power

T

6. Theory of Operation

6.1 Description of Overall System

Figure 6-1 shows the overall system. Main power flows through 3 modules of power transfer unit. The A board is identified as user interface controller. It scans front panel keys through K board, and sends settings and measurement messages on LCD module. The optional E board performs remote control through GPIB, RS-232C interface.

( Master )

( Slave 1 )

( Slave 2 )

Board

Figure 6-1 The Structure of 61700

Board

6.2 Description of Power Transfer Unit

Figure 6-2 shows the power transfer unit. The A/D power stage is designated as I board, and generates DC voltage from the line input. The G board of D/D stage takes power from the A/D output. It generates two isolated DC outputs for D/A power stage. T he H board of D/A inverter generates AC output. The D/A power stage is through G board relays in parallel or series control to obtain more current and higher voltage. B board is identified as DSP processor and D/A controller. The DSP processor is applied to control output frequency and voltage, to measure voltage and current.

6-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Relay

V and I I Board

D/A FFan

D

C

B Board

Input

Output

TTL

Connector

System

EMI

D/D

A/D G Board

E Board

Ext V

Power

Measure

and EMI Filter

Power

Filter

Power Stage

Power

Board

Signal

Board

Control Measure

Figure 6-2 The Structure of Power Transfer Unit

Fan

Control

Power Stage

6-2

Self-test and Troubleshooting

Error Code

Description

Remark

Bit 0

SRAM error

0 – OK, 1 - ERROR

Bit 1

CODE error

0 – OK, 1 – ERROR

Bit 2

DATA error

0 – OK, 1 – ERROR

Bit 3

Communication error

0 – OK, 1 - ERROR

Bit 4

Output test result

0 – OK, 1 – ERROR

Bit 5

Reserved

Bit 6

Reserved

Bit 7

Reserved

Error Message

Description

Action

SRAM error

SRAM test fail.

Consult your dealer for assistance.

CODE error

Prog ram cod e test fail.

Consult your dealer for assistance.

DATA error

Data in Flash or EEPROM test fail.

Consult your dealer for assistance.

Communication error

Cannot communicate.

1. Power off the AC source, wait for

2. Consult your dealer for assistance.

7. Self-test and Troubleshooting

7.1 General

This section describes the self-test steps and suggested troubleshooting procedures when AC source does not function normally. If the problem cannot be solved using the in formation given here, consult the distributor whom you purchased the unit.

7.2 Self-test

When power-on the AC source, it performs a series of self-test. Firstly, it does the memory, data and communication self-test. They contain three items: DISPLAY, WAVEFORM, and REMOTE. If any failure is detected on a certain item, an "error code" will be shown at the right side of that item. The following table shows all the error messages:

Example : If error code shows " ERROR = 05 ", the error code in binary is " 00000101". The bit 0 and bit 2 are " 1 ". So " ERROR = 05 " means SRAM error and DATA error occurs.

three seconds, power on again.

After the memory, data and communication self-test, the AC source does the power output self-test. In this procedure, the output relays are in OFF state to sure not harming the load connecting on output terminal. Then, the AC source will check if there is any protection signal sent from hardware. If it does, the display shows "Output self test <NG>". It means the AC source is abnormal. Press protection signal, the AC source will program 300Vac and measure the voltage. If the measured voltage is over 300V±5V, the power self-test is failed, and the display also shows " Output self test <NG> ". Probably AC source has not been calibrated (updated the software especially). Users can do following steps to reassure.

ENTER to see what protection condition is. If no

7-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

Problem

Reason

Solution

Poor measurement of V, I.

Aging of components result in

Periodic calibration is required.

Distorted output

1. The AC source output

at high frequency.

1. Program higher output voltage. Reduce the load or lower than the

OVER TEMP

1. Ambient temperature is too

2. Air way is obstructed.

1. Operate the unit 0 ~ 40°C

OVER POWER protection (OPP)

The output power is over specification.

Remove the over power or lower down output voltage.

OVER CURRENT protection (OCP)

The output current is over specification or I LIMIT.

Remove the overload or relax the I LIMIT.

OUT PUT SHORT protection

1. The output is shorted.

2. External current reverse.

1. Remove the short.

2. Remove the load.

INPUT FAIL protection (UVP)

The AC source line input voltage is too low or too high.

Measure input voltage, and regulate it if it's over specification.

INT _ A D

1. Line input voltage cycle

1. Check the stability of input

assistance.

INT _ DD

1. Line input voltage cycle

1. Check the stability of input

assistance.

OUTPUT OVP

1. Remote sense is open.

1. Connect the output to remote Check the settings of Vac and Vdc

on MAIN PAGE.

Cannot control AC

1. The AC source unit address

2. GPIB cable is loose at rear.

1. Update address. screws.

1. Press ENTER to ignore the NG.

2. If no PROTECTION, press PAGE/EXIT to change to MAIN PAGE.

3. Program a small voltage as 10Vac then press OUT/QUIT, see the measurement from LCD display if V is about 10V or not.

If the reading of V is about 10V, the AC source needs to calibrate (see Chapter 4). If the reading does not change apparently or show an unreasonable value, or display shows PROTECTION, the AC source does have some problems. Consult your dealer for assistance.

7.3 Troubleshooting

The following table lists the operating problems and suggests corrective actions:

protection (OTP)

protection

deviation of characteristics.

voltage is too low.

2. The rectified load is too large

high.

dropout.

2. Instant over current of output.

3. AD power stage damaged.

Refe r to Chap 4. Calibration.

2. output frequency.

2. Unblock the air way.

voltage.

2. Remove the load.

3. If cannot reset the status of protection, consult the dealer for

protection

2. Instant over current of

3. DD power stage damaged.

protection

source by GPIB

7-2

2. Output voltage peak is over

dropout. output.

range.

is incorrect.

voltage.

2. Remove the load.

3. If cannot reset the status of protection, consult the dealer for

sense terminals.

2.

2. Check connection, tighten the

Remote Operation

Pin No.

Input/Output

Description

1

---

No connection

2

OUTPUT

TxD

3

INPUT

RxD

4

---

No connection

5

---

GND

6

---

No connection

7

---

No connection

8

---

No connection

9

---

No connection

8. Remote Operation

8.1 General Informat ion

The AC Source can be controlled remotely through the GPIB or the RS-232C port. The GPIB port is mostly used, but the RS-232C port is helpful too.

Technically speaking, the GPIB interface is quite different from the RS-232C interface. The GPIB interface is an 8-bit parallel data bus owning a host of bus commands for synchronization, and up to one Megabyte transfer rate. The RS-232C interface, a series bus with a few handshake lines for synchronization, is less capable, so its requirement is not so much, and users can write a simple program to do basic remote control easily.

8.1.1 Setting the GPIB Address and RS-232C Parameters

The AC Source is shipped with the GPIB address which is set to 30. The address can be changed from the “CONF” functional list menu (refer to 3.6.3) only. This menu is also used to select the RS-232C interface, and specify the parameters of RS-232C such as baud rate and parity.

8.1.2 Wire Connection of RS-232C

The AC Source is shipped with the baud rate which is set to 19200, and with parity which is set to None. For RS-232C interface, only the signals of TxD and RxD are used for its transferring of data. The RS-232C connector is a 9-pin D subminiature female connector. The following table describes the pins and signals of RS-232C connector.

Interconnection between the computer (compatible with IBM PC) and the AC Source is illustrated below:

8-1

Programmable AC Source 61701/61702/61703/61704 User’s Manual

8-2

1

2

3

4

5

6

7

9

8

IBM PC

DCD

RX

TX

DTR

GND

DSR

RTS

RI

CTS

AC Source

No Connection

TX

RX

No Connection

GND

No Connection

GPIB

Capability

Description

Interface

Functions

Talker/Listener

Commands and response messages can be sent and read using a series poll.

Service Request

The AC Source sets the SRQ line true if there is an enabled service request condition.

Remote/Local

The AC Source powers up in local state. In local state,

the AC Source to local state.

Vac = 0.0_ R H

8.2 The GPIB Capability of the AC Source

received over the GPIB bus. Status information can be

the front panel is operative, and the AC Source responds to the commands from GPIB. In remote state*, all front panel keys except the “<PAGE/EXIT>” key are disabled. Press “<PAGE/EXIT>” key to return

*Remote State: The panel shows remote message on the LCD display as below:

Freq = 60.00 Pt = 0.0 Vrms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00 I rms Φ1 = 0.00 Φ2 = 0.00 Φ3 = 0.00

In remote state, all front panel keys except the “<PAGE/EXIT>” key are di sabled. Press the “<PAGE/EXIT>” key to return the AC Source to the local state.

AH1, SH1, T6, L4

SR1 RL1





Remote Operation

Symbol

Description

Example

NR1

It is a digit with no decimal point. The decimal is assumed to be at the right of the least significant digit.

123, 0123

NR2

It is a digit with a decimal point.

12.3, .123

NR3

It is a digit with a decimal point and an exponent.

1.23E+2

8.3 Introduction to Programming

All commands and response messages are transferred in form of ASCII codes. The response messages must be read completely before a new command is sent, otherwise the remaining response messages will be lost, and a query interrupt error will occur.

8.3.1 Conventions

Angle brackets < > Items in angle brackets are parameter abbreviations. Vertical bar | Vertical bar separates alternative parameters. Square brackets [ ] I t ems in square brackets are optional. For example, OUTP [ : STATe] means that : STATe may be omitted. Braces { } Braces indicate the parameters that may be repeated. T he notation <A> {<, B>} means that parameter “A” must be entered while parameter “B” may be omitted or entered once or more times.

8.3.2 Numerical Data Formats

All data programmed to or returned from the AC Source are ASCII. The data can be numerical or character string.

Numerical Data Formats

8.3.3 Boolean Data Format

The Boolean parameter <Boolean> has the form ON|OFF only.

8.3.4 Character Data Format

The character strings returned by query command may take either of the following forms: <CRD> Character Response Data: character string with maximum length of 12.

<SRD> String Response Data: character string.

8.3.5 Basic Definition

Command Tree Table:

The commands of the AC Source are based on a hierarchical structure, also known as a tree

8-3

Programmable AC Source 61701/61702/61703/61704 User’s Manual

8-4

Note

The response message is terminated by <NL> <END> for GPIB, and <NL> for RS-232C.

system. In order to obtain a particular command, the full path to that command must be specified. This path is represented in the table by placing the highest node in the farthest left position of the hierarchy. Lower nodes in the hierarchy are indented in the position to the right, below the parent node.

Program Headers:

Program headers are key words that identify the command. T hey follow the syntax described in subsection 8.6 of IEEE 488.2. The AC Source accepts characters in both upper and lower case without distinguishing the difference. Program headers consist of two distinctive types, common command headers and instrument-controlled headers.

Common Command and Query Headers:

The syntax of common command and query headers is described in IEEE 488.2. It is used together with the IEEE 488.2-defined common commands and queries. The commands with a leading “ * ” are common commands.

Instrument-Controlled Headers:

Instrument-controlled headers are used for all other instrument commands. Each of them has a long form and a short form. The AC Source only accepts the exact short and long forms. A special notation will be taken to differentiate the short form header from the long one of the same header in this subsection. The short forms of the headers are shown in characters of upper case, whereas the rest of the headers are shown in those of lower case.

Program Header Separator (:):

If a command has more than one header, the user must separate them with a colon (FETC:CURR?, VOLT:DC 10). Data must be separated from program header by one space at least.

Program Message:

Program message consists of a sequence of zero or more elements of program message unit that is separated by separator elements of program message unit.

Program Message Unit:

Program message unit represents a single command, programming data, or query. Example: FREQ?, OUTPut ON.

Program Message Unit Separator ( ; ):

The separator (semicolon ;) separates the program message unit elements from one another in a program message.

Example: VOLT:AC 110 ; FREQ 120<PMT>

Program Message Terminator (<PMT>):

A program message terminator represents the end of a program message. Three permitted terminators are:

(1) <END>: end or identify (EOI) (2) <NL>: new line which is a sing le ASCII -encoded byte 0A (10 decimals). (3) <NL> <END>: new line with EOI.

Remote Operation

Headers

VOLT

:

AMPL

Data

100

;

RANG HIGH

;

Root Specifier

: MEAS : CURR ? <NL>

Message Terminat or

Head Separator

Message Unit Separators

Query Header

Figure 8-1 The Structure of Command Message

8.4 Traversal of the Command Tree

Multiple program message unit elements can be sent in a program message. The first command is always referred to the root node. Subsequent commands are referred to the same tree level as the previous command in a program message. A colon preceding a program message unit changes the header path to the root level.

Example: OUTPut : PROTection : CLEar All colons are header separators.

: OUTPut : PROTection : CLEar Only the first colon is a specific root. OUTPut : PROTection : CLEar; : VOLT : AC 100 Only the third colon is a specific root.

8.5 The Execution Order

The AC Source executes program messages by the order received. Program message units except coupled commands are executed in order of reception. The execution of coupled commands is deferred until program message terminator is received. A coupled command sets parameters which are affected by the setting of other commands. Problems may arise, because the prior state of the AC Source w il l affect the response of a coupled parameter to its programming.

For example, assume that the current output voltage range is LOW, a new state is desired with output voltage range HIGH, and amplify 220 Volt. If the commands

VOLTage : AC 220<PMT> VOLTa ge : RANGe HIGH<PMT>

are sent, data out of range error will be produced. Reversing the order, or sending the commands in one program message can avoid such kind of error. For the above example, the program message

VOLTage : AC 220 ; VOLTage : RANGe HIGH<PMT> can be sent without error.

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Bit Position

7

6

5

4

3

2 1 0

Bit Name

PON

- - -

CME

EXE

DDE

QYE

- - -

OPC

CME = Command error DDE = Device-dependent error PON = Power-on QYE = Query error

8.6 The Commands of the AC Source

This subsection is going to talk about the syntax and parameters for all commands of the AC Source. The examples given for each command are generic.

Syntax Forms Definitions of syntax are in long form headers, whereas only short form

headers appear in examples. Parameters Most commands require a parameter. Return Parameters All queries return a parameter. Models If a command is merely applied to specific models, these models will be

listed in the Model only entry. If t here is no Model only entry, the

command will be applied to all models.

8.6.1 Common Command Dictionary

Common commands begin with a “*”, and consist of three letters and/or one “?” (query). Common commands and queries are listed alphabetically.

*CLS Clear status This command clears the following registers. (1) Questionable Status Event (2) Status Byte (3) Error Que u e

*ESE<n> Standard event status enabled This command programs the Standard Event register bits. If one or more of the enabled events of the Standard Event register is set, the ESB of Status Byte Register is set too.

Bit Configuration of Standard Event Status Enabled Register

EXE = Execution error OPC = Operation complete

*ESE? Return standard event status enabled

The query reads the Standard Event Status Event register. Reading of the register clears it. The bits of configuration are the same as Standard Event Status Enabled Register.

*IDN? Return the AC Source identification string

Return Parameter Chroma ATE 61704,123456,1.00,1.01,1.02 Chroma ATE : Company name 61704 : Model name 123456 : Serial number

1.00,1.01,1.02

*RCL<n> Restore the values of the specific group which is previously stored in memory.

Parameter 1 - 3

: Firmware version of display, waveform and remote

Remote Operation

Bit Position

7 6 5

4

3

2

1

0

Condition

- -

MSS RQS

ESB

MAV

QUES

- -

*RST This command resets the AC Source to the initial states. It’s better to wait

about 3 second to send the next command.

*SAV<n> Save the values into the specific group in memory.

Parameter 1 - 3

*SRE This command sets conditions of the Service Request Enabled Register. If

one or more of the enabled events of the Status Byte Register is set, the MSS

and RQS of Status Byte Register are set too. *SRE? This query returns the Service Request Enabled Register. *STB? This query returns the Status Byte Register.

Bit configuration of Status Byte Register

ESB = event status byte summary

QES = questionable status summary

RQS = reques t for serv i ce

MSS = master status summary

MAV = message available *TST? This command queries the self-test result of the AC Source.

8.6.2 Instrument Command Dictionary

The commands are listed in alphabetical order. Commands followed by question marks (?) take only the query forms. When commands take both the command and query forms, they are noted in the query syntax descriptions.

8.6.2.1 SYSTEM Sub-system

SYSTem : ERRor? : VERSion? : LOC al : REMote

SYSTem : ERRor?

Description : This command queries the error string of the command parser. Query Syntax : SYSTem : ERRor? Parameters : NONE Return Parameters : Response error string: No Error Data Format Error Data Range Error Too Many Errors Execution Error

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SYSTem : VERSion?

Description : This query requests the AC Source to identify itself. Query Syntax : SYSTem : VERSion? Parameters : NONE Return Parameters :

SYSTem : LOCal

Description : This command can only be used under the control of RS-232C.

If SYST: LOC is programmed, the AC Source will be set in the

LOCAL state, and the front panel will work. Query Syntax : NONE Parameters : NONE Return Parameters : NONE

SYSTem : REMote

Description : This command can only be used under the control of RS-232C.

If SYST: REM is programmed, the AC Source will be set in the

REMOTE state, and the front panel will be disabled except the

“<PAGE/EXIT> key. Query Syntax : NONE Parameters : NONE Return Parameters : NONE

8.6.2.2 INSTRUMENT Sub-system

INSTrument : COUPle : NSELect : SELect : PHASe : SLAVE1 : SLAVE2

INSTrument : COUPle

Description : In a multi-phase power source it is convenient to set parameters

for all phases simultaneously with one programmed command.

When INST: COUP ALL command is programmed, a command

will be sent to the AC Source, and to all phases in the end.

INST: COUP NONE command cancels COUP ALL command.

This command affects the set voltage only. Query Syntax : INSTrument : COUPle? Parameters : ALL | NONE Return Parameters : NONE

INSTrument : NSELect

Description : This command sets individual outputs in a multi-phase model

for subsequent commands or queries. If INST: COUP NONE

is programmed, the phase-selective commands are sent to the

Remote Operation

particular output phase set by INSTrument: NSELect. If INST:

COUP ALL is programmed, all Rem ote Operation commands

are sent to all output phases. This command affects the set

voltage and queries measurement data. For example, if “INST:

COUP ALL ”, “INST : NSEL 2” and “Meas : V?” are programmed ,

the AC Source will return Φ 2’s measured voltage. INST:

NSEL selects phase by number. Query Syntax : INSTrument : NSELect? Parameters : 1 | 2 | 3 Return Parameters : 1 | 2 | 3

INSTrument : SELect

Description : This command sets individual outputs in a multi-phase model

for subsequent commands or queries. If INST: COUP NONE

is programmed, the phase-selective commands are sent to the

particular output phase set by INSTrument: SELect. If INST:

COUP ALL is programmed, all Remote Operation commands

are sent to all output phases. This command affects the set

voltage and queries measurement data. For example, if “INST:

COUP ALL ”, “INST: SEL OUTPUT2” and “Meas: V?” are

programmed, the AC Source will return Φ2’s measured voltage.

INST: SELect selects phase by name. Query Syntax : NONE Parameters : OUTPUT1 | OUTPUT2 | OUTPUT3 Return Parameters : NONE

INSTrument : PHASe : SLAVE1

Description : This command sets the phase shift between Φ1 and Φ2. The

default value is 120 degree. Query Syntax : INSTrument : PHASe : SLAVE1? Parameters : <NR1>, valid range: 0 ~ 359.9 Return Parameters : <NR1>

INSTrument : PHASe : SLAVE2

Description : This command sets the phase shift between Φ1 and Φ3. The

default value is 240 degree. Query Syntax : INSTrument : PHASe : SLAVE2? Parameters : <NR1>, valid range: 0 ~ 359.9 Return Parameters : <NR1>

8.6.2.3 FETCH & ME ASURE S ub-system

FETCh | MEASure

[ : SCALar]

: CURRent

: AC? Query the rms current : DC? Query the DC current level : AMPLitude : MAXimum? Query the peak current

: CREStfactor? Query the current crest factor : INRush? Query the inrush current : FREQuency? Query the frequency

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: POW er : AC

[: REAL]? Query the true power : APParent? Query the apparent power : REACtive? Query the reactive power : PFACtor? Query the power factor

: TOTal? Query the total power :VOLTage : ACDC? Q uer y the rms voltage : DC? Query the DC voltage

This command lets the user get measurement data from the AC Source. Two measurement commands are available: MEASure and FETCh. MEASure triggers the acquisition of new data before returning data. FETCh returns the previously acquired data from measurement buffer.

FETCh [ : SCALar] : CURRent : AC? MEASure [ : SCALar] : CURRent : AC?

Description : These queries return the rms current which is being output at

the output terminal. Query Syntax : FETCh : CURRent : AC?, MEASure : CURRent : AC? Return Parameters : <NR2>

FETCh [ : SCALar] : CURRent : DC? MEASure [ : SCALar] : CURRent : DC?

Description : These queries return the DC current which is being outpu t at the

output terminal. Query Syntax : FETCh : CURRent : DC?, MEASure : CURRent : DC? Return Parameters : <NR2>

FETCh [ : SCALar] : CURRent : AMPLitude : MAXimum? MEASure [ : SCALar] : CURRent : AMPLitude : MAXimum?

Description : These queries return the absolute value of peak current. Query Syntax : FETCh : CURRent : AMPLitude : MAXimum?,

MEASure : CURRent : AMPLitude : MAXimum? Return Parameters : <NR2>

FETCh [ : SCALar] : CURRent : CREStfactor? MEASure [ : SCALar] : CURRent : CREStfactor?

Description : These queries return the output current crest factor. It is the

ratio of peak output current to rms output current. Query Syntax : FETCh : CURRent : CREStfactor?

MEASure : CURRent : CREStfactor? Return Parameters : <NR2>

FETCh [ : SCALar] : CURRent : INRush? MEASure [ : SCALar] : CURRent : INRush?

Description : These queries return the inrush current which is being output at

the output terminal. Query Syntax : FETCh:CURRent: INRush?, MEASure: CURRent : INRush?

Remote Operation

APPARENTPOWER REALPOWER

2 2

−

Return Parameters : <NR2>

FETCh [ : SCALar] : FREQuency? MEASure [ : SCALar] : FREQuency?

Description : These queries return the output frequency in Hertz. Query Syntax : FETCh : FREQuency?

MEASure : FREQuency?

Return Parameters : <NR2>

FETCh [ : SCALar] : POWer : AC [ : REAL] ? MEASure [ : SCALar] : POWer : AC [ : REAL] ?

Description : These queries return the true power which is being output at

output terminals in watts.

Query Syntax : FETCh : POWer : AC?

MEASure : POWer : AC?

Return Parameters : <NR2>

FETCh [ : SCALar] : POWer : AC : APParent? MEASure [ : SCALar] : POWer : AC : APParent?

Description : These queries return the apparent power which is being output

at output terminals in volt-amperes.

Query Syntax : FETCh : POWer : AC : APParent?

MEASure : POWer : AC : APParent?

Return Parameters : <NR2>

FETCh [ : SCALar] : POWer : AC : REACtive? MEASure [ : SCALar] : POWer : AC : REACtive?

Description : These queries return the reactive power w hich is b eing output at

output terminals in volt-amperes. Reactive power is computed

as: VAR =

Query Syntax : FETCh : POWer : AC : REACtive?

MEASure : POWer : AC : REACtive?

Return Parameters : <NR2>

FETCh [ : SCALar] : POWer : AC : PFACtor? MEASure [ : SCALar] : POWer : AC : PFACtor?

Description : These queries return the power factor which is being output at

output terminals. Power factor is computed as:

PF = TRUE POWER / APPARENT POWER

Query Syntax : FETCh : POWer : AC : PFACtor?

MEASure : POWer : AC : PFACtor?

Return Parameters : <NR2>

FETCh [ : SCALar] : POWer : AC : TOTal ? MEASure [ : SCALar] : POWer : AC : TOTal ?

Description : These queries return the total true power which is being output

at 3-phase of output terminals in watts.

Query Syntax : FETCh : POWer : AC : TOTal?

MEASure : POWer : AC : TOTal?

Return Parameters : <NR2>

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FETCh [ : SCALar] : VOLTage : ACDC? MEASure [ : SCALar] : VOLTage : ACDC?

Description : These queries return the rms voltage which is being output at

the output terminals.

Query Syntax : FETCh [ : SCALar] : VOLTag e : ACDC?

MEASure [ : SCALar] : VOLTage : ACDC?

Return Parameters : <NR2>

FETCh [ : SCALar] : VOLTage : DC? MEASure [ : SCALar] : VOLTage : DC?

Description : These queries return the DC composition of output voltage

which is being output at the output terminals.

Query Syntax : FETCh [ : SCALar] : VOLTage : DC?

MEASure [ : SCALar] : VOLTage : DC?

Return Parameters : <NR2>

8.6.2.4 OUTPUT Sub-system

OUTPut

[: STATe] : RELay

: SLEW

: VOLTag e : AC

: DC : MODE : PROTection :CLEar

OUTPut [: STATe]

Description : This command enables or disables the output of the AC Source.

Disable output is to set an output voltage amplitude at 0 Volt.

Query Syntax : OUTPut [: S TATe]? Parameters : OFF | ON Return Parameters : OFF | ON

OUTPut : RELay

Description : This command sets output relay on or off. Query Syntax : OUTPut : RELay? Parameters : OFF | ON, ON sets the output relay of the AC Source on

(closed). OFF sets the output relay of the AC Source off (open).

Return Parameters : OFF | ON

OUTPut : SLEW : VOLTage : AC

Description : This command sets the slew rate of the AC output voltage. Query Syntax : OUTPut : SLEW : VOLTage : AC?

Parameters : <NR2>, valid range: 0.000V/ms ~ 1200.000V/ms Return Parameters : <NR2>

Remote Operation

OUTPut : SLEW : VOLTage : DC

Description : This command sets the slew rate of the DC composition

voltage.

Query Syntax : OUTPut : SLEW : VOLTage : DC? Parameters : <NR2>, valid range: 0.000V/ms ~ 1000.000V/ms Return Parameters : <NR2>

OUTPut : MODE

Description : This command sets the operation mode. “FIXED” MODE is

OUTPut : PROTection : CLEar

Description : This command clears the latch that disables the output when an

overcurrent (OC), overtemperature (OT), overpower (OP) or remote inhibit (RI) is detected. All conditions, which have generated the fault, must be removed before the latch is

cleared. Query Syntax : None Parameters : None Return Parameters : None

8.6.2.5 SOURCE S ub-system

[SOURce :]

CURRent : LIMit : DELay : INRush : STARt : INTerval FREQency [: {CW | IMMediate}] VOLTage

[: LEVel][: IMMediate][:AMPLitude] : AC : DC : LIMit : AC : DC : PLUS : MINus : RANGe

FUNCtion

: SHAPe : SHAPe

: A

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: A

: MODE : THD : AMP : B : B

: MODE : THD : AMP

[SOURce :] CURRent : LIMit

Description : This command sets the rms current limit of the AC Source for

software protection. Query Syntax : [SOURce :] CURRent : LIMit? Parameters : <NR2>, valid range: 0.00 ~ maximum current spec. of the

specific model. (unit: A) Return Parameters : <NR2>

[SOURce :] CURRent : DELay

Description : This command sets the delay time for triggering over current

protection. Query Syntax : [SOURce :] CURRent : DELay? Parameters : <NR2>, valid range: 0.0 ~ 5.0 (unit: 0.5 second) Return Parameters : <NR2>

[SOURce :] CURRent : INRUsh : STARt

Description : This command sets the start time of the inrush current

measurement. Query Syntax : [SOURce :] CURRent : INRUsh : STARt? Parameters : <NR2>, valid range: 0.0 ~ 999.9 (unit: ms) Return Parameters : <NR2>

[SOURce :] CURRent : INRUsh : INTer val

Description : This command sets the measuring interval of the inrush current

measurement. Query Syntax : [SOURce :] CURRent : INRUsh : INTerval? Parameters : <NR2>, valid range: 0.0 ~ 999.9 (unit: ms) Return Parameters : <NR2>

[SOURce :] FREQuency [: {CW | IMMediate}]

Description : The command sets the frequency of the output waveform of the

AC Source in Hz. Query Syntax : [SOURce :] FREQuency [: {CW | IMMediate}]? Parameters : <NR2>, valid range: 15.00 ~ 1200.00 (unit: Hz) Return Parameters : <NR2>

[SOURce :] FUNCtion : SHAPe

Description : This command specifies the waveform buffer. There are two

buffers for the output of the AC Source, so the user must specify the contents of waveform buffer A or B of the AC Source.

Remote Operation

Query Syntax : [SOURce :] FUNCtion : SHAPe? Parameters : A | B Return Parameters : A | B

[SOURce :] FUNCtion : SHAPe : A

Description : This command specifies the waveform shape of waveform buffer A. Query Syntax : [SOURce :] FUNCtion : SHAPe : A?

[SOURce :] FUNCtion : SHAPe : A : MODE

Description : This command selects the mode of the value for the clipped

sine in waveform buffer A. Query Syntax : [SOURce :] FUNCtion : SHAPe : A : MODE? Parameters : AMP | THD Return Parameters : AMP | THD

[SOURce :] FUNCtion : SHAPe : A : THD

Description : This command sets the percentage of THD at which the

clipped sine clips in waveform buffer A. Query Syntax : [SOURce :] FUNCtion : SHAPe : A : THD? Parameters : <NR2>, valid r ange: 0.0% ~ 43% Return Parameters : <NR2>

[SOURce :] FUNCtion : SHAPe: A : AMP

Description : This command sets the percentage of peak at which the

clipped sine clips in waveform buffer A. Query Syntax : [SOURce :] FU NCtion : SH A Pe : A : AMP? Parameters : <NR2>, valid range: 0.0% ~ 100% Return Parameters : <NR2>

[SOURce :] FUNCtion : SHAPe : B

Description : This command specifies the waveform shape of waveform

[SOURce :] FUNCtion : SHAPe : B : MODE

Description : This command selects the mode of the value for the clipped

sine in waveform buffer B. Query Syntax : [SOURce :] F UNCtion : SHAPe : B : MODE? Parameters : AMP | THD Return Parameters : AMP | THD

[SOURce :] FUNCtion : SHAPe : B : THD

Description : This command sets the percentage of THD at which the

clipped sine clips in waveform buffer B. Query Syntax : [SOURc e :] F UNCtion : SHAPe : B : THD? Parameters : <NR2>, valid range: 0.0% ~ 43%

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Return Parameters : <NR2>

[SOURce :] FUNCtion : SHAPe: B : AMP

Description : This command sets the percentage of peak at which the

clipped sine clips in waveform buffer B. Query Syntax : [SOURce :] F UNCtion : SHAPe : B : AMP? Parameters : <NR2>, valid range: 0.0% ~ 100% Return Parameters : <NR2>

[SOURce :] VOLTage [: LEVel][: IMMediate][: AMPLitude] : AC

Description : This command sets the AC composition of output voltage in

Volts. Query Syntax : [SOURce : ] VOL Ta ge [: LE Ve l][: IMMediate][: AMP Li tud e] : AC ? Parameters : <NR2>, valid range: 0.0 ~ 150.0 (in low range), 0.0 ~ 300.0 (in

high range) Return Parameters : <NR2>

[SOURce :] VOLTage [: LEVel][: IMMediate][: AMPLitude] : DC

Description : This command sets the DC composition of output voltage in

Volts. Query Syntax : [SOURce :] V OLTa ge [: LEV el][: IM M edia te][: AM PLi tude] : DC ? Parameters : <NR2>, valid range: -212.1 ~ 212.1 (in low range), -424.2 ~

424.2 (in high range)

Return Parameters : <NR2>

[SOURce :] VOLTage : LIMit : AC

Description : This command sets the setting of Vac LIMIT which will restrict

the value of Vac. Query Syntax : [SOURce :] VOLTage : LIMit : AC? Parameters : <NR2>, valid range: 0.0 ~ 300.0 (unit: V) Return Parameters : <NR2>

[SOURce :] VOLTage : LIMit : DC : PLUS

Description : This command sets the setting of Vdc LIMIT(+) which will

restrict the value of Vdc. Query Syntax : [SOURce :] VOLTage : LIMit : DC : PLUS? Parameters : <NR2>, valid range: 0.0 ~ 424.2 (unit: V) Return Parameters : <NR2>

[SOURce :] VOLTage : LIMit : DC : MINus

Description : This command sets the setting of Vdc LIMIT(-) which will restrict

the value of Vdc. Query Syntax : [SOURce :] VOLTage : LIMit : DC : MINus? Parameters : <NR2>, valid range: 0.0 ~ -424.2 (unit: V) Return Parameters : <NR2>

[SOURce :] VOLTage : RANGe

Description : This command sets output voltage range with two options of

LOW(150 V), HIGH(300 V). Query Syntax : [SOURce :] VOLTage : RANGe?

Remote Operation

Parameters : LOW | HIGH Return Parameters : LOW | HIGH

8.6.2.6 CONFIG URE S ub-system

[SOURce :]

CONFigure : INHibit

[SOURce :] CONFigure : INHibit?

Description : This command sets REMOTE INHIBIT state. There are three

states for the feature of remote inhibit: OFF, LIVE, and TRIG. Query Syntax : [SOURce :] CONFigure : INHibit? Parameters : OFF | LIVE | TRIG Return Parameters : OFF | LIVE | TRIG

8.6.2.7 PHASE Sub-system

[SOURce :]

PHASe : ON : OFF

[SOURce :] PHASe : ON

Description : This command sets the transition angle of the waveform when it

out. Default DEGREE ON is 0 degree. Query Syntax : [SOURce :] PHASe : ON? Parameters : <NR2>, valid range: 0.0 ~ 359.9 Return Parameters : <NR2>

[SOURce :] PHASe : OFF

Description : This command sets the transition angle of the waveform when it

quit. Query Syntax : [SOURce :] PHASe : OFF? Parameters : <NR2>, valid range: 0.0 ~ 360.0, 360.0: mean is IMMED. Return Parameters : <NR2>

8.6.2.8 TRACE Sub-system

TRACe

: RMS

TRACe

Description : This command sets waveform data of user-defined. It needs 1024

data points to construct a period of waveform. Users have to normalize the data as the maximum point equal to 32767 or the minimum point equal to -32767.

Syntax : TRACe <waveform_name>, <amplitude> {,<amplitude>}

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Parameters : <waveform_name>:US<n>, n=1~6, <amplitude>:<NR1>,valid

range : -32767 ~ 32767.

Example : TRACe US1,100,200,…,32767,...,500,800 <= 1024 points

This command needs about 5 sec to execute.

TRACe : RMS

Description : This command sets the rms value of user’s waveform.

Users need to calculate the root mean square value of 1024 data

points. Syntax : TRACe : RMS <waveform_name>, <rms> Parameters : <waveform_name>:US<n>, n=1~6, <rms>:<NR1>, valid range:

0 ~ 32767.

Example : TRACe : RMS US1,27000

8.6.2.9 LIST Sub-system

[SOURce :]

LIST

: COUPle

: POINts? : COUNt : DWEL l : SHAPe : BASE : VOLTage

: AC

: STAR t : END

: DC

: STAR t : END

: FREQuency

: STAR t : END

: DEGRee

OUTPut

: MODE

TRIG TRIG : STATE?

[SOURce:]LIST : COUPle

Description : This command sets the mode of list function.

Query Syntax : [SOURce:] LIST : C OUPle? Parameters : ALL | NONE Return Parameters : ALL | NONE

[SOURce:] LIST : POINts?

Description : This command returns the number of sequences of the list

Remote Operation

mode. Query Syntax : [SOURce:] LIST : POINts? Parameters : None Return Parameters : <NR1>, valid range: 0 ~ 100

[SOURce :] LIST : COUNt

Description : This command sets the number of times that the list is executed

before it is completed. Query Syntax : [SOURce :] LIST : COUNt? Parameters : <NR1>, valid range: 0 ~ 65535 Return Parameters : <NR1>

[SOURce :] LIST : DWELl

Description : This command sets the sequence of dwell time list points. Query Syntax : [SOURce:] LIST : DWELl? Parameters : <NR2>, …, <NR2> valid range: 0 ~ 99999999.9 (unit: ms) Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : SHAPe

Description : This command sets the sequence of waveform buffer list

points . Query Syntax : [SOURce:] LIST : SHAPe? Parameters : A|B, …, A|B Return Parameters : A|B, …, A|B

[SOURce :] LIST : BASE

Description : This command sets time base of list. Query Syntax : [SOURce:] LIST : BASE? Parameters : TIME | CYCLE Return Parameters : TIME | CYCLE

[SOURce :] LIST : VOLTage : AC : STARt

Description : This command sets the sequence of AC start voltage list points.

Query Syntax : [SOURce:] LIST : VOLTage : AC : STARt?

Param eters : <NR2>, …, <NR2> valid ra nge: 0.0 ~ 1 50.0 (in low range),0.0 ~

300.0 (in high range)

Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : VOLTage : AC : END

Description : This command sets the sequence of AC end voltage list points.

Query Syntax : [SOURce:] LIST : VOLTage : AC : END?

Param eters : <NR2>, …, <NR2> v alid range: 0.0 ~ 150.0 (in l ow range),0.0 ~

300.0 (in high range)

Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : VOLTage : DC : STARt

Description : This command sets the sequence of DC start voltage list

points.

Query Syntax : [SOURce:] LIST : VOLTage : DC : STARt?

Parameters : <NR2>, …, <NR2> valid range: -212.1 ~ 212.1 (in low range),

-424.2 ~ 424.2 (in high range)

Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : VOLTage : DC : END

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Description : This command sets the sequence of DC end voltage list

points.

Query Syntax : [SOURce:] LIST : VOLTage : DC : END?

Parameters : <NR2>, …, <NR2> valid range: -212.1 ~ 212.1 (in low range),

-424.2 ~ 424.2 (in high range)

Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : FREQuency : STARt

Description : This command sets the sequence of start frequency list

points.

Query Syntax : [SOURce:] LIST : FREQuency : STARt?

Parameters : <NR2>, …, <NR2> valid range: 15.00 ~ 1200.00 (unit: Hz)

Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : FREQuency : END

Description : This command sets the sequence of end frequency list points.

Query Syntax : [SOURce:] LIST : FREQuency : END?

Parameters : <NR2>, …, <NR2> valid range: 15.00 ~ 1200.00 (unit: Hz)

Return Parameters : <NR2>, …, <NR2>

[SOURce :] LIST : DEGRee

Description : This command sets the sequence of phase angle list points.

Query Syntax : [SOURce:] LIST : DEGRee? Parameters : <NR2>, …, <NR2> valid range: 0.0 ~ 359.9 Return Parameters : <NR2>, …, <NR2>

OUTPut : MODE

TRIG

Description : This command sets LIST mode in OFF, ON execution state

after setting O UTPut : MODE LI ST. If users want to change the parameters, it’s necessary to set TRIG OFF then OUTPut : MODE FIXED. Then, set OU TPut : MODE LIST again to get

ready to set TRIG ON. Query Syntax : TRIG : STATE? Parameters : OFF | ON Return Parameters : OFF | RUNNING

8.6.2.10 PULSE Sub-system

[SOURce :]

PULSe

: VOLTage

: AC

: DC : FREQuency : SHAPe : SPHase

Remote Operation

: COUNt : DCYCle : PERiod

OUTPut

: MODE

TRIG TRIG : STATE?

[SOURce :] PULSe : VOLTage : AC

Description : This command sets AC voltage in the duty cycle of PULSE

mode.

Query Syntax : [SOURce :] PULSe : VOLTage : AC?

Parameters : <NR2>, valid range: 0.0 ~ 150.0 (in low range), 0.0 ~ 300.0 (in

high range)

Return Parameters : <NR2>

[SOURce :] PULSe : VOLTage : DC

Description : This command sets the DC voltage in the duty cycle of PULSE

mode.

Query Syntax : [SOURce :] PULSe : VOLTage : DC?

Parameters : <NR2>, valid range: -212.1 ~ 212.1 (in low range), -424.2 ~

424.2 (in high range)

Return Parameters : <NR2>

[SOURce :] PULSe : FREQuency

Description : This command sets the frequency during the duty cycle of

PULSE mode. Query Syntax : [SOURce :] PULSe : FREQuency? Parameters : <NR2>, valid range: 15.00 ~ 1200.00 (unit: Hz) Return Parameters : <NR2>

[SOURce :] PULSe : SHAPe

Description : This command selects the waveform buffer for PULSE mode.

Query Syntax : [SOURce :] PULSe : SHAPe? Parameters : A | B Return Parameters : A | B

[SOURce :] PULSe : SPHase

Description : This command sets the start phase angle of duty cycle of

PULSE mode. Query Syntax : [SOURce :] PULSe : SPHase? Parameters : <NR2>, valid range: 0.0 ~ 359.9 Return Parameters : <NR2>

[SOURce :] PULSe : COUNt

Description : This command sets the number of times that the pulse is

executed before it is completed. Query Syntax : [SOURce :] PULSe : COUNt? Parameters : <NR2>, valid range: 0 ~ 65535 Return Parameters : <NR2>

[SOURce :] PULSe : DCYCle

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Description : This command sets the duty cycle of PULSE mode. Query Syntax : [SOURce :] PULSe : DCYCle? Parameters : <NR2>, valid range: 0 % ~ 100 % Return Parameters : <NR2>

[SOURce :] PULSe : PERiod

Description : This command sets the period of the PULSE mode. Query Syntax : [SOURce :] PULSe : PERiod? Parameters : <NR2>, valid range: 0.1 ~ 99999999.9 (unit: ms) Return Parameters : <NR2>

OUTPut : MODE

TRIG

Description : This command sets PULSE mode in OFF execution state

after setting O UTPut : MODE PULSE. If users want to change the parameters, it’s necessary to set TRIG OFF then OUTPut : MODE FIXED. Then, set OUTPut : MODE PULSE

again to get ready to set TRIG ON. Query Syntax : TRIG : STATE? Parameters : OFF | ON Return Parameters : OFF | RUNNING

8.6.2.11 STEP Sub-system

[SOURce :]

STEP

: VOLTage

: AC

: DC : FREQuency : SHAPe : SPHase : DVOLtage

: AC

: DC : DFRequency : DWELl : COUNt

OUTPut

: MODE

TRIG TRIG : STATE?

[SOURce :] STEP : VOLTage : AC

Description : This command sets the initial AC voltage of STEP mode.

Remote Operation

Query Syntax : [SOURce :] STEP : VOLTage : AC?

Parameters : <NR2>, valid range: 0.0 ~ 150.0 (in low range), 0.0 ~ 300.0 (in

high range)

Return Parameters : <NR2>

[SOURce :] STEP : VOLTage : DC

Description : This command sets the initial DC voltage of STEP mode. Query Syntax : [SOURce :] STEP : VOLTage : DC?

Parameters : <NR2>, valid range: -212.1 ~ 212.1 (in low range), -424.2 ~

424.2 (in high range)

Return Parameters : <NR2>

[SOURce :] STEP : FREQuency

Description : This command sets the initial frequency of STEP mode. Query Syntax : [SOURce :] STEP : FREQue n c y? Parameters : <NR2>, valid range: 15.00 ~ 1200.00 (unit: Hz) Return Parameters : <NR2>

[SOURce :] STEP : SHAPe

Description : This command selects the waveform buffer for STEP mode.

Query Syntax : [SOURce :] STEP : SHAPe? Parameters : A | B Return Parameters : A | B

[SOURce :] STEP : SPHase

Description : This command sets the start phase angle of STEP mode.

Query Syntax : [SOURce :] STEP : SPHase? Parameters : <NR2>, valid range: 0.0 ~ 359.9 Return Parameters : <NR2>

[SOURce :] STEP : DVOLtage : AC

Description : This command sets the delta AC voltage in each step. Query Syntax : [SOURce :] STEP : DVOLtage : AC?

Parameters : <NR2>, valid range: -150.0 ~ 150.0 (in low range), -300.0 ~

300.0 (in high range)

Return Parameters : <NR2>

[SOURce :] STEP : DVOLtage : DC

Description : This command sets the delta DC voltage in each step. Query Syntax : [SOURce :] STEP : DVOLtage : DC?

Parameters : <NR2>, valid range: -212.1 ~ 212.1 (in low range), -424.2 ~

424.2 (in high range)

Return Parameters : <NR2>

[SOURce :] STEP : DFRequency

Description : This command sets the delta frequency in each step. Query Syntax : [SOURce :] STEP : DFRequency? Parameters : <NR2>, valid range: -1200.00 ~ 1200.00 (unit: Hz) Return Parameters : <NR2>

[SOURce :] STEP : DWELl

Description : This command sets the dwell time in each step. Query Syntax : [SOURce :] STEP : DWELl? Parameters : <NR2>, valid range: 0.1 ~ 99999999.9 (unit: ms)

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Return Parameters : <NR2>

[SOURce :] STEP : COUNt

Description : This command sets the number of times that the step is

executed before it is completed. Query Syntax : [SOURce :] STEP : COUNt? Parameters : <NR2>, valid range: 0 ~ 65535 Return Parameters : <NR2>

OUTPut : MODE

TRIG

Description : This command sets STEP mode in OFF, ON execution state

after setting O UTPut : MODE STEP. If users want to change the parameters, it’s necessary to set TRIG OFF then OUTPut : MODE FIXED. Then, set OUTPut : MODE STEP again to get

ready to set TRIG ON. Query Syntax : TRIG : STATE? Parameters : OFF | ON Return Parameters : OFF | RUNNING

8.6.2.12 INTERHARMONICS Sub-system

[SOURce :]

INTerharmonics

: FREQuency

: STAR t

: END : LEVel : DWEL l : MODe

OUTPut

: MODE

TRIG TRIG : STATE?

FETCh | MEASure

: INTerharmonics

: FREQuency? Query the sweeping frequency

[SOURce :] INTerharmonics : FREQuency : STARt

Description : This command sets the start frequency of the sweep wave of

INTERHARMONICS mode. Query Syntax : [SOURce :] INTerharmonics : FREQuency : STARt? Parameters : <NR2>, valid range: 0.01 ~ 2400.00 (unit: Hz) Return Parameters : <NR2>

Chroma 61704 User's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1. General Information

1.1 Introduction

1.2 Key Features

1.3 Specifications

1.4 Names of Parts

1.4.1 The Front Panel

1.4.2 The Rear Panel

1.4.3 Rear Panel (with USB and Ethernet)

2. Installation

2.1 Inspection

2.2 Preparation for the Use

2.3 Requirements of Input Power

2.3.1 Ratings

2.3.2 Input Connection

2.4 Output Connection

2.5 Remote Sense Connection

2.6 The Procedures of P ower-on

2.7 I/O Connectors (Option)

3. Local Operation

3.1 Introduction

3.2 Operation through Keypad and RPG

3.3 MAIN PAGE (Output Setting and Measurement)

3.4 CHOICE PAGE (Functional List Choice)

3.5 SETUP Functional List

3.5.1 RANGE

3.5.2 Vac LIMIT

3.5.3 Vdc LIMIT (+), Vdc LIMIT (-)

3.5.4 I LIMIT, DELAY

3.5.5 OUTPUT RELAY

3.5.6 BUZZER

3.5.7 DATALOCK

3.5.8 Is START, Is INTERVAL

3.6 CONF Functional List

3.6.1 REMOTE INHIB I T

3.6.2 EXT. V, COUPLE (Reserved)

3.6.3 WAVEFORM GENERATOR (Optional Function)

3.6.4 GPIB Address, RS -232C

3.6.5 POWER ON STATUS

3.7 OUTPUT Functional List

3.7.1 V_SET

3.7.2 Output Degree

3.7.3 Vdc Output

3.7.4 Phase Angle Setting

3.7.5 Slew Rate of Output Transient

3.8 Save and Recall

3.8.1 Save and Recall Output Setting

3.8.2 Save and Recall System Data

3.9 Protection

4. Calibration

4.1 Introduction

4.2 MANUAL CALI Functional List

4.2.1 Output Voltage and Voltage Measurement Calibration

4.2.2 Current Measurement Calibration

4.2.3 External Vref Calibration (Reserved)

4.2.4 Phase Angle Calibration

5. Application

5.1 General

5.2 List Mode (Optional Function)

5.3 Pulse Mode (Optional Function)

5.4 Step Mode (Optional Function)

5.5 Interharmonics Waveform (Optional Function)

6. Theory of Operation

6.1 Description of Overall System

6.2 Description of Power Transfer Unit

7. Self-test and Troubleshooting

7.1 General

7.2 Self-test

7.3 Troubleshooting

8. Remote Operation

8.1 General Informat ion

8.1.1 Setting the GPIB Address and RS-232C Parameters

8.1.2 Wire Connection of RS-232C

8.2 The GPIB Capability of the AC Source

8.3 Introduction to Programming

8.3.1 Conventions

8.3.2 Numerical Data Formats