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Programmable
DC Electronic Load
6310 Series
Operation & Programming
Manual

Edition
May 2002
P/N A11 000078
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. 43 Wu-Chuan Road, Wu-Ku Industrial Park, Wu-Ku, Taipei, 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.

ii
Warranty
All Chroma instruments are warranted against defects in material and workmanship for a
period of one year after 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. Transportation to the factory or service
center is to be prepaid by purchaser. 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 for use of its products are based upon tests believed
to be reliable, but 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.
43 Wu-Chuan Road, Wu-Ku Industrial Park,
Wu-Ku, Taipei Hsien, Taiwan
Tel: 886 -2-2298-3855
Fax: 886-2-2298-3596
http://www.chromaate.com

iii
CE-Conformity Declaration
For the following equipment:
Product Name: DC Electronic Load
Model Name: 6314, 6312, 63101, 63102, 63103, 63105, 63106, 63107, 63108, 63112
Manufacturer's Name: Chroma ATE Inc.
Manufacturer's Address: 43 Wu-Chuan Road, Wu-Ku Industrial Park,
Wu-Ku, Taipei Hsien, Taiwan

is herewith confirmed to comply with the requirements set out in the Council
Directive on the Approximation of the Laws of the Member States Relating to
Electromagnetic Compatibility(89/336/EEC) and electrical equipment designed
for use within certain voltage limits(73/23/EEC;93/68/EEC)

For electromagnetic compatibility, the following standards were applied:

EMC: EN55011:1991 (Group I Class A)
EN60555-2:1987--EN 61000-3-2(1995)
EN60555-3:1987--EN 61000-3-3(1995)
EN50082-1:1992 IEC 1000-4-2(1995):1991 - 8 kV AD, 4 kV CD (Class B)
IEC 1000-4-3(1995) - 3 V/m
IEC 1000-4-4(1995) - 0.5 kV Signal Lines
1 kV Power Lines

For safety requirement, the following standard was applied:

Safety: EN61010-1(1993)+A2(1995)

Taiwan July 1999
Place Date Neng-Sung Lee/Vice President, Engineering

Warning:
This is a class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.

iv
SAFETY SUMMARY

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 product is set to match the available line voltage and the correct fuse is
installed.

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 typenormal 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.

DO NOT REMOVE THE COVER OF THE INSTRUMENT
Operating personnel must not remove the cover of the instrument. Component replacement
and internal adjustment can only be done by qualified service personnel.

v
SAFETY SYMBOLS

DANGER - High voltage.

ExplanationTo avoid injury, death of personnel, or damage to the
instrument, the operator must refer to an explanation in the instruction
manual.
Protective grounding terminalTo protect against electrical shock in
case of a fault. This symbol indicates that the terminal must be
connected to ground before operation of equipment.
The WARNING sign denotes a hazard. It calls attention to a procedure,
WARNING practice, or the like, which, if not correctly performed or adhered to, could
result in personal injury. Do not proceed beyond a WARNING sign until
the indicated conditions are fully understood and met.
The CAUTION sign denotes a hazard. It calls attention to an operating
CAUTION procedure, or the like, which, if not correctly performed or adhered to,
could result in damage to or destruction of part or all of the products. Do
not proceed beyond a CAUTION sign until the indicated conditions are
fully understood and met.

vi
Programmable DC Electronic Load 6310 Series Operation & Programming Manual

Table of Contents
PART 1: Operation
1. General Information ................................................................................................ 1-1
1.1 Introduction ........................................................................................................ 1-1
1.2 Description ......................................................................................................... 1-1
1.3 Overview of Key Features.................................................................................. 1-2
1.4 Specifications ..................................................................................................... 1-2
2. Installation ................................................................................................................ 2-1
2.1 Introduction ........................................................................................................ 2-1
2.2 Inspection ........................................................................................................... 2-1
2.3 Installing the Modules........................................................................................ 2-1
2.3.1 Channel Number ........................................................................................ 2-2
2.4 Installing the Mainframe .................................................................................... 2-3
2.4.1 Changing Line Voltage .............................................................................. 2-3
2.4.2 Turn-On Self-Test ...................................................................................... 2-4
2.5 Application Connection ..................................................................................... 2-5
2.5.1 Load Connections....................................................................................... 2-5
2.5.2 Remote Sensing Connections..................................................................... 2-6
2.5.3 Parallel Connections................................................................................... 2-6
2.6 Remote Control Connection............................................................................... 2-7
3. Operation Overview................................................................................................. 3-1
3.1 Introduction ........................................................................................................ 3-1
3.2 Front Panel Description...................................................................................... 3-1
3.3 Rear Panel Description....................................................................................... 3-2
3.4 Local/Remote Control ........................................................................................ 3-3
3.5 Modes of Operation............................................................................................ 3-3
3.5.1 Constant Current Mode .............................................................................. 3-4
3.5.2 Constant Resistance Mode ......................................................................... 3-7
3.5.3 Constant Voltage Mode.............................................................................. 3-8
3.6 Load Synchronization ........................................................................................ 3-8
3.7 Measurements..................................................................................................... 3-9
3.8 Slew Rate & Minimum Transient Time............................................................. 3-9
3.9 Start/Stop Sink Current ...................................................................................... 3-9
3.10 Short On/Off..................................................................................................... 3-10
3.11 Load On/Off ..................................................................................................... 3-11
3.12 Protection Features........................................................................................... 3-11
3.13 Save/Recall Setting .......................................................................................... 3-12
3.14 Program ............................................................................................................ 3-12
4. Local Operation........................................................................................................ 4-1
4.1 Introduction ........................................................................................................ 4-1
4.2 Local Operation of Load Mainframe ................................................................. 4-1
4.2.1 Selecting the Channel................................................................................. 4-3
4.2.2 Setting the Operation Mode ....................................................................... 4-3
4.2.3 Setting the Program.................................................................................... 4-7
4.2.4 Running the Program ................................................................................. 4-9
4.2.5 Setting the Specification .......................................................................... 4-10

vii
Programmable DC Electronic Load 6310 Series Operation & Programming Manual

4.2.6 Setting the Configuration ......................................................................... 4-10
4.2.7 Recalling Files.......................................................................................... 4-15
4.2.8 Saving File/Default/Program.................................................................... 4-15
4.2.9 Going To Local ........................................................................................ 4-15
4.2.10 Lock Operation......................................................................................... 4-16
4.2.11 Setting System and RS-232C Connection................................................ 4-16
4.2.12 Connecting the GO/NG Output Port ........................................................ 4-16
4.2.13 Setting the GPIB Address ........................................................................ 4-17
4.3 Local Operation of Load Module..................................................................... 4-17
4.3.1 Local Operation of Single Channel/Module (Panel A)............................ 4-18
4.3.2 Local Operation of Double Channels/Module (Panel B) ......................... 4-20
4.3.3 Online Change Level................................................................................ 4-22
PART 2: Programming
5. General Information for Programming ................................................................. 5-1
5.1 Introduction ........................................................................................................ 5-1
5.2 DIP Switches on the GPIB Card ........................................................................ 5-1
5.2.1 GPIB Address............................................................................................. 5-1
5.2.2 Other DIP Switches.................................................................................... 5-2
5.3 GPIB Capability of the Electronic Load ............................................................ 5-2
5.4 RS232C in Remote Control................................................................................ 5-3
6. Introduction to Programming................................................................................. 6-1
6.1 Basic Definition.................................................................................................. 6-1
6.2 Numerical Data Formats .................................................................................... 6-1
6.3 Character Data Formats...................................................................................... 6-2
6.4 Separators and Terminators................................................................................ 6-3
7. Language Dictionary................................................................................................ 7-1
7.1 Common Commands.......................................................................................... 7-1
7.2 Specific Commands............................................................................................ 7-5
7.2.1 ABORT Subsystem .................................................................................... 7-5
7.2.2 CHANNEL Subsystem .............................................................................. 7-6
7.2.3 CONFIGURE Subsystem........................................................................... 7-8
7.2.4 CURRENT Subsystem............................................................................. 7-12
7.2.5 FETCH Subsystem................................................................................... 7-15
7.2.6 LOAD Subsystem .................................................................................... 7-16
7.2.7 MEASURE Subsystem ............................................................................ 7-19
7.2.8 MODE Subsystem.................................................................................... 7-21
7.2.9 PROGRAM Subsystem............................................................................ 7-22
7.2.10 RESISTANCE Subsystem ....................................................................... 7-27
7.2.11 RUN Subsystem ....................................................................................... 7-28
7.2.12 SHOW Subsystem.................................................................................... 7-28
7.2.13 SPECIFICATION Subsystem .................................................................. 7-29
7.2.14 STATUS Subsystem ................................................................................ 7-32
7.2.15 VOLTAGE Subsystem............................................................................. 7-36
8. Status Reporting....................................................................................................... 8-1
8.1 Introduction ........................................................................................................ 8-1
8.2 Register Information in Common ...................................................................... 8-1

viii
Programmable DC Electronic Load 6310 Series Operation & Programming Manual

8.3 Channel Status.................................................................................................... 8-3
8.4 Channel Summary .............................................................................................. 8-3
8.5 Questionable Status ............................................................................................ 8-4
8.6 Output Queue ..................................................................................................... 8-4
8.7 Standard Event Status ........................................................................................ 8-4
8.8 Status Byte register ............................................................................................ 8-5
8.9 Service Request Enable register......................................................................... 8-6
9. An Example of Use ................................................................................................... 9-1

ix
PART 1

Operation
General Information

1. General Information

1.1 Introduction
This manual contains specifications, installation, operation, and programming instructions of
6314, 6312 electronic load mainframes as well as 63102, 63103, 63105 ... electronic load
modules. Here "Load" means the electronic load modules of Chroma 6310 series while
"Mainframe" the 6314, 6312 electronic load mainframes.

1.2 Description

The functions of 6314 and 6312 mainframes are the same. The former has four slots for
Load modules while the latter two slots. The functions of 63102, 63103, 63105, etc. are all
the same. The differences are in input voltage, load current, and power ratings. An
individual module may have one or two channels. Each channel has its own channel number,
load & measurement connectors, and operates independently in constant current (CC) mode,
constant resistance (CR) mode, or constant voltage (CV) mode.

Figure 1-1 The Front Panel of the Electronic Load

On the front panel of the electronic load as shown in Figure 1-1 there are two groups of
keypads. One is the Mainframe keypad. The other is the Load keypad. In this manual,
Mainframe keypad is described as MODE while Load keypad as SHORT .

1-1
Programmable DC Electronic Load 6310 Series Operation & Programming Manual

1.3 Overview of Key Features
A. Configuration