Chroma 6404 User manual

Programmable AC Source
6404/6408
User’s Manual
Version 1.6
November 2015
P/N A11 000020

ii
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 contained herein or direct, 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 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.

iii
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 products repaired or altered 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: [phone]
Fax: [phone]
e-mail: [email protected]
http://www.chromaate.com

iv
Material Contents Declaration
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>.
<Table 1>
Part Name
Hazardous Substances
Lead
Mercury
Cadmiu
m
Hexavalent
Chromium
Polybrominate
d Biphenyls
Polybromodiphen
yl Ethers
Pb
Hg
Cd
Cr6+
PBB
PBDE
PCBA O O O O O O
CHASSIS O O O O O O
ACCESSORY O O O O O O
PACKAGE O O O O O O
“O” indicates that the level of the specified chemical substance is less than the threshold
level specified in
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
specified in
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. When replacing old appliances with a new one, the retailer is legally
obligated to take back your old appliances for disposal free of charge.

v
<Table 2>
Part Name
Hazardous Substances
Lead
Mercur
y
Cadmiu
m
Hexavalent
Chromium
Polybrominate
d Biphenyls
Polybromodiphen
yl Ethers
Pb
Hg
Cd
Cr6+
PBB
PBDE
PCBA O O O O O
CHASSIS O O O O O
ACCESSORY O O O O O
PACKAGE O O O O O O
“O” indicates that the level of the specified chemical substance is less than the threshold
level specified in 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
specified in the standards of SJ/T
-11363-2006 and EU 2005/618/EC.
1.
Chroma is not fully transitioned to lead-free solder assembly at this moment; however,
most of the components used are RoHS compliant.
2.
The environment-friendly usage period of the product is assumed under the operating
environment specified in each product’s specification.
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. When replacing old appliances with a new one, the retailer is legally
obligated to take back your old appliances for disposal free of charge.

vi
Revision History
The following lists the additions, deletions and modifications in this manual at each revision.
Date
Version
Revised Sections
Dec. 1999
1.0
Complete this manual.
Jun. 2002
1.1
Reformat the manual style.
May 2005
1.2
Change the address and phone no. of Chroma.
Mar. 2007
1.3
Add “Material Contents Declaration”.
Jun. 2009
1.4
Modify the accuracy of the voltage for Measurement in the section of
“Specifications” under “Product Overview” chapter .
Jun. 2014
1.5
Add “Declaration of Conformity.”
Modify the input voltage specificaitons of Model 6404 and 6408.
Modify the front and rear panel figures and descriptions in the
section of “Operational Panels.”
Nov. 2015
1.6
Remove CE Declaration of Conformity.

Programmable AC Source 6404/6408 User’s Manual
vii
Table of Contents
1. Product Overview............................................................................................... 1-1
1.1 Introduction......................................................................................................... 1-1
1.2 Key Features...................................................................................................... 1-1
1.3 Specifications ..................................................................................................... 1-2
1.4 Operational Panels............................................................................................. 1-4
1.4.1 Front Panel............................................................................................ 1-4
1.4.2 Rear Panel ............................................................................................ 1-6
2. Installation.......................................................................................................... 2-1
2.1 Inspection........................................................................................................... 2-1
2.2 Preparation for Use ............................................................................................ 2-1
2.3 Input Power Requirements................................................................................. 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................................................................................. 2-3
2.6 Power-on Procedure........................................................................................... 2-3
2.7 I/O Connectors (Option)...................................................................................... 2-4
3. Local Operation.................................................................................................. 3-1
3.1 Introduction......................................................................................................... 3-1
3.2 Set up................................................................................................................. 3-1
3.2.1 GPIB address........................................................................................ 3-1
3.2.2 RS-232C................................................................................................ 3-2
3.2.3 OVP....................................................................................................... 3-2
3.2.4 Sound (ON/OFF) ................................................................................... 3-3
3.2.5 System test............................................................................................ 3-3
3.2.6 Power on status..................................................................................... 3-4
3.3 Output Setting & Execution................................................................................. 3-4
3.3.1 I limit...................................................................................................... 3-5
3.3.2 Range.................................................................................................... 3-5
3.3.3 Output V & F.......................................................................................... 3-6
3.4 Save & Recall..................................................................................................... 3-6
3.5 Data Lock........................................................................................................... 3-7
3.6 Ext Prog ............................................................................................................. 3-7
3.7 Measurement ..................................................................................................... 3-8
3.7.1 Select Measurement Items.................................................................... 3-8
3.7.2 Measurement Functions ........................................................................ 3-8
3.8 Local................................................................................................................... 3-8
3.9 Protection........................................................................................................... 3-9
4. Theory of Operation........................................................................................... 4-1
4.1 General .............................................................................................................. 4-1
4.2 Overall System Description ................................................................................ 4-1
4.3 AC/DC Power Stage Converter .......................................................................... 4-2
4.4 DC/AC Inverter................................................................................................... 4-2
4.5 CPU.................................................................................................................... 4-3
4.6 Measurement & Sine wave Generator (B Board)................................................ 4-3
4.7 Keyboard & Display............................................................................................ 4-3
4.8 GPIB/RS-232C/External reference..................................................................... 4-3
5. Self-test and Troubleshooting........................................................................... 5-1
5.1 General .............................................................................................................. 5-1

Programmable AC Source 6404/6408 User’s Manual
viii
5.2 Self-test Routine................................................................................................. 5-1
5.3 Troubleshooting.................................................................................................. 5-1
6. Remote Operation .............................................................................................. 6-1
6.1 General Information............................................................................................ 6-1
6.2 GPIB Capability of the AC Source...................................................................... 6-1
6.3 Introduction to Programming .............................................................................. 6-1
6.3.1 Conventions........................................................................................... 6-1
6.3.2 Numerical Data Formats........................................................................ 6-2
6.3.3 Boolean Data Format............................................................................. 6-2
6.3.4 Character Data Format.......................................................................... 6-3
6.3.5 Basic Definition...................................................................................... 6-3
6.4 Traversal of the Command Tree......................................................................... 6-4
6.5 The AC Source Commands................................................................................ 6-4
6.5.1 Command Tree Table............................................................................ 6-4
6.5.2 Command Dictionary............................................................................. 6-6

Product Overview
1-1
1. Product Overview
1.1 Introduction
Chroma 6400 Series products, including 6404 and 6408, are high efficiency AC Power
Sources that provide sine wave output with low distortion. The microprocessor controlled
sine wave oscillator generates accurate and stable output voltages and frequencies. The
PWM (Pulse Width Modulation) approach of the power stage allows for full volt—ampere
and current rating into loads. The 6408 can supply up to 800 VA, the 6404, up to 375 VA.
The accurate DSP (Digital Signal Processing) measurement capabilities provide
independent verification of operating values, thus reducing the need for external measuring
instruments.
The 6404/6408 Series AC Power Source is considerably smaller, lighter and more efficient
than traditional supplies with a similar output power capability.
This manual contains descriptions of Chroma 6404/6408 Programmable AC source for
specifications, installation procedure, operation instructions and maintenance procedures.
1.2 Key Features
A. Configuration
•Local operation on front panel keypad
•Remote operation via GPIB or RS232 interface
•Protections against Over-power, Over-voltage, Over-current, Over-temperature, Fan-fail
•Temperature controlled fan speed
•Built-in output isolation relays
B. Input/Output
•Selectable full scale output: 150V/300V/Auto
•Remote control using analog voltage reference
•V, F, PF, CF, I, P measurement
•Programmable limit of output Ipk

Programmable AC Source 6404/6408 User’s Manual
1-2
1.3 Specifications
The operation specifications of the model 6404/6408 are listed in this section. All
specifications are tested according to standard Chroma test procedures.
(All specifications are based on 25±1°C resistor load unless specified otherwise).
Model
6404
6408-1
6408-2
OUTPUT
Max. power
375VA
800VA
800VA
Voltage
Range
150V/300V/Auto
Accuracy
0.2 % of F.S. (for freq. ≤200Hz)
0.4 % of F.S. (for freq. >200Hz)
Resolution
0.1V
Temp. coeff.
0.02 % per degree from 25°C
Current
Range
2.5A/1.25A
5.33A/2.67A
5.33A/2.67A
C.F.
Typical 2.8 for freq. ≤100Hz
Typical 2.2 for freq. >100Hz
Frequency
Range
45 to 500 Hz
Accuracy
0.1%
Resolution
0.1Hz
Temp. coeff.
50 ppm/°C from 25°C
Distortion
Typical 0.3% (≤200Hz)
Typical 0.8 % for freq. >200Hz
Line regulation
0.1 % F.S.
Load regulation
0.1% F.S.
INPUT
Voltage Range
100 - 120V±10% &
200 - 240V±10%
100 - 120V±10%
200 - 240V±10%
Current
7 A max.
12 A max.
6 A max.
Frequency range
47 - 63 Hz
Power factor
Typical 0.8
0.98 min.
0.98 min.
EFFICIENCY
Typical 75%
Typical 80%
MEASUREMENT
Voltage
Range
0-150V / 0-300V
Accuracy (rms)
0.2% F.S. +0.2% reading
Resolution
0.1V
Current
Range
0 to 2 A
2 to 10 A
0 to 4 A
4 to 20 A
0 to 4 A
4 to 20 A
Accuracy
0.2% F.S. + 0.5% reading
Resolution
0.01A
True Power
Range
0-375W
0-800W
0-800W
Accuracy
0.5% F.S.
Resolution
0.1 Watt

Product Overview
1-3
SAFETY REQUIREMENT
Meet IEC 1010-1, UL 1244
EMI REQUIREMENT
FCC 15J class A
PROTECTION
UVP, OCP, SHT, OPP, OTP, FAN
OTHERS
Size (WXHXD)
483X134X468 mm3
Weight
18 Kg
23 Kg
23 Kg
Temperature Range
Operation
0 to + 40°C
Storage
– 40°C to +85°C
Humidity
30 % to 90 %
Note
1. Maximum distortion for voltage ranges from half to full range with linear load.
2. These items are tested with full power linear load.

Programmable AC Source 6404/6408 User’s Manual
1-4
1.4 Operational Panels
1.4.1 Front Panel
Item
Symbol
Description
1
Alphanumeric LED: A row of red seven-segment LEDs are
equipped for displaying setup messages and numeric value of
settings or measurement results. The display area is divided
into three sections; value of V shows at the left, frequency or I
limit, at the middle, and any of I/P/PF/CF measurement value,
at the right.
2
Indicator LED: LEDs located on the upper and lower part of
the display panel are the indicators for showing the status
being activated. These indicators include “VOLT”, “FREQ”, “I
LIMIT”, “I”, “P”, “PF”, “CF”, “LOCK”, “PROTECTION”, “EXT
PROG”, “RMT”, “150V”, “300V”, “AUTO”.
Besides, two LEDs, “OUT” and “SHIFT”, for showing activation
of output and shift mode, are available which are located on
the keypad area next to the corresponding keys.
3
V/F
-------- or --------
I limit
V/F or I limit selection key: Under normal mode, the V/F
key offers the user selection of programming on voltage or
frequency. Under shift mode, this key enables the user to
program software limit for current (I limit).
4 I/P/PF/CF
-------- or ---------
LOCAL
I/P/PF/CF selection key: Under normal mode, the user can
repeatedly press this key to select one of the measurement
values to be displayed. Under shift mode, this key provides the
user for returning controls from remote PC to front panel
keypad.
5 OUT/QUIT
-------- or ---------
EXT PROG
OUT/QUIT command key: Under normal operation, presses of
this key may enable the 6404/6408 outputs power to the
loading devices. If the user enters setup procedures, this key is
used to quit from current setting routine. Under shift mode, this
key enables external programming.

Product Overview
1-5
6
SHIFT
Shift mode selection key: Press this key switches the
6404/6408 from the normal operational mode to the shift mode,
or from shift back to normal.
7
1 to 9 , 0
and 
-------- or --------
F1 to F9
,LOCK ,
and RANGE
Numeric and decimal keys: Under normal mode, the user
can program numeric data using the digital keys and the
decimal key. Under shift mode, the keys from 1to 9save
data to or recalls them from memory channels F1 to F9
respectively. Additionally, under shift mode, 0enables data
lock and configure setup, and offers full range
programming.
8
ENTER The ENTER key is to confirm setting of parameters.
9
Rotary knob: The user may input programming data or options
by turning the rotary knob to the desired ones.
10
Universal Output connectors: These connectors output
power to the loads.
11
Main Power switch: Power on/off the 6404/6408 using this
switch.
Table 1-1 Front Panel Description

Programmable AC Source 6404/6408 User’s Manual
1-6
1.4.2 Rear Panel
Item
Name
Description
1
Product Label
The model number 6404 or 6408 and power line input ratings are
marked on the label.
2
Power Line Input
Connector
Power line input is connected to the 6404/6408 through this
connector.
3
Cooling Fan
Cooling fan speed automatically increases or decreases as
temperature rises or falls.
4
Ext. V Ref.
Control the output Vrms of the 6404/6408 by using external DC
voltage level. Such signal is input through this BNC connector. This
connector is on the same optional board as items 5 and 6.
5
RS-232C
Connector
This port located on the same GPIB optional board offers
alternative interface to the 6404/6408 for remote operation.
6
GPIB Connector
The optional interface provided by the 6404/6408 for
communication with the remote GPIB controller.
7
Power Line
Output Connector
Output power can be connected from the terminal block located at
the rear panel of the instrument through terminals L and N to the
load.
Table 1-2 Rear Panel Description

Installation
2-1
2. Installation
2.1 Inspection
When unpacking the instrument, inspect for any damage that may have occurred in
shipping. Save all packing materials in case the unit has to be returned.
If any damage is found, please file a claim with the carrier immediately. Do not return the
instrument to the factory without prior RMA acceptance from Chroma.
2.2 Preparation for Use
To start up, the instrument must be connected with an appropriate AC line input. The
instrument is smart fan cooled and must be installed with sufficient space to the rear for
airflow. It should be used in an area where the ambient temperature does not exceed +40°C.
2.3 Input Power Requirements
2.3.1 Ratings
Input Voltage Range 6408-1 : 100 ~ 120±10% Vac, single phase
6408-2 : 200 ~ 240±10% Vac, single phase
6404 : 100 ~ 120±10% Vac, 200 ~ 240 ±10% Vac (auto range),
single phase
Input Frequency 47-63 Hz
Max. Current 6408-1 : 12 A
6408-2 : 6 A
6404 : 7 A
Max. Power 6408-1 : 1000 W
6408-2 : 1000 W
6404 : 500 W
2.3.2 Input Connection
The input power inlets are located on the rear panel of the instrument. Refer to Figure 2-1.
Input of the 6404/6408 must be connected from a three-wire single phase AC power outlet.
The power line input must have a current rating greater than or equal to the instrument fuse
current rating.
To protect operating personnel, the wire connected to the GND
terminal must be connected to an earth ground. In no event should this
instrument be operated without an adequate ground connection.
WARNING

Programmable AC Source 6404/6408 User’s Manual
2-2
Figure 2-1 Input Connections
Figure 2-2 Output Connections
Figure 2-3 Output Connections

Installation
2-3
2.4 Output Connection
Output power can be connected from the terminal block located at the rear panel of the
instrument through terminals L and N to the load. Besides, it can be connected from the
universal receptacle located at the front panel using power cord to the load. To satisfy
safety requirements, the wires to the load should be of a sufficiently large gauge to insure
they do not overheat while carrying the output current. Refer to Figure 2-2 and Figure 2-3.
2.5 Remote Sense Connection
The remote sensing connections improves the voltage regulation at the load by monitoring
the voltage there instead of at the AC source output terminal. Remote Sensing allows the
power supply to automatically increase the output voltage and compensate the voltage
drops in the load leads. Note that with remote sensing, voltage read-back is at the load.
Connect the unit for remote voltage sensing by connecting load leads from the output
terminals to the load, and the sensing leads from the SLand SNterminals to the load as
shown in Figure 2-3.
2.6 Power-on Procedure
Apply the line power and turn on the front panel power switch. No loads should be
connected to the output terminal block. The instrument performs a series of self-tests each
time when turning on the power-switch. All front panel LEDs, including alphanumeric and
indicator LEDs, are turned on and holds about 3 seconds. Then, the seven segment LEDs,
alphanumeric LEDs will show “SELF TEST” indicating that the 6404/6408 is running self-
test routines.
Then, the seven segment LEDs display model number (6404 or 6408), firmware version
number (e.g. “ver 1.2”) as below:
6408 ver 1.2
If any error is detected during the self-test routine, an error message will be displayed on
the LED. For example,
RAM TEST ERR
The following table shows all the error messages and recommended actions:
Item
Error Message
Description
Action
1
RAM TEST ERR
System memory test failure.
Consult your dealer
for assistance in case of
self-test failure.
2
EEPROM ERR
System EEPROM tests failure.
3
DSP COMM ERR
CPU and DSP communication test
failure.
After the self-test routines are completed the LEDs turn to show the current setting values of
V and F, and measured value of I, indicating the 6404/6408 is ready for use as below:
0.0 60.0 0.00

Programmable AC Source 6404/6408 User’s Manual
2-4
Before the instrument is turned on, all protective earth terminals,
extension cords, and devices connected to the instrument should be
connected to a protective earth ground. Any interruption of the
protective earth grounding will cause a potential shock hazard that
could result in personal injury.
2.7 I/O Connectors (Option)
GPIB RS-232
Figure 2-4 Figure 2-5
EXT PROG OPTION BOARD
Figure 2-6 Figure 2-7
WARNING