Keithley 2308 User Manual
www.keithley.com
Model 2308 Portable Device
Battery/Charger Simulator
User’s Manual
2308-900-01 Rev. A / July 2008
2308-900-01.qxp 7/28/08 11:07 AM Page 1
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WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of
one (1) year from date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables,
software, rechargeable batteries, diskettes, and documentation.
During the warranty period, Keithley Instruments will, at its option, either repair or replace any product that proves
to be defective.
To exercise this warranty, write or call your local Keithley Instruments representative, or contact
Keithley Instruments headquarters in Cleveland, Ohio. You will be given prompt assistance and return instructions.
Send the product, transportation prepaid, to the indicated service facility. Repairs will be made and the product
returned, transportation prepaid. Repaired or replaced products are warranted for the balance of the original
warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley Instruments’ express
written consent, or misuse of any product or part. This warranty also does not apply to fuses, software,
non-rechargeable batteries, damage from battery leakage, or problems arising from normal wear or failure to follow
instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES
PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE
OF ITS INSTRUMENTS AND SOFTWARE, EVEN IF KEITHLEY INSTRUMENTS, INC. HAS BEEN ADVISED IN
ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT
ARE NOT LIMITED TO: COST OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF
INJURY TO ANY PERSON, OR DAMAGE TO PROPERTY.
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139
440-248-0400 • Fax: 440-248-6168 • 1-888-KEITHLEY (1-888-534-8453) • www.keithley.com
Keithley Instruments, Inc.
3/07
Model 2308 Portable Device
Battery/Charger Simulator
User’s Manual
©2008, Keithley Instruments, Inc.
All rights reserved.
Any unauthorized reproduction, photocopy, or use the information herein, in whole or in part, without the prior written
approval of Keithley Instruments, Inc. is strictly prohibited.
TSP, TSP-Link, and TSP-Net are trademarks of Keithley Instruments, Inc. All other brand names are trademarks or
registered trademarks of their respective holders.
Cleveland, Ohio, U.S.A.
Document Number:
2308-900-01 Rev. A / July 2008
The following safety precautions should be observed before using this product and any associated instrumentation. Although some
instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may
be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required
to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer
to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is
operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument.
They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or
replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the
operator may perform them. Otherwise, they should be performed only by service personnel.
Safety Precautions
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service
personnel may perform installation and service procedures.
Keithley Instruments products are designed for use with electrical signals that are rated Measurement Category I and Measurement
Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and
data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with high transient
over-voltages. Measurement Category II connections require protection for high transient over-voltages often associated with local AC
mains connections. Assume all measurement, control, and data I/O connections are for connection to Category I sources unless otherwise
marked or described in the user documentation.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures. The
American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak,
or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are
prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact.
Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of
operating at or above 1000V, no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources. NEVER
connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current
and voltage to the card.
Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the connecting
cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
11/ 07
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power
!
disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test.
ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers,
installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always
make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.
The instrument and accessories must be used in accordance with its specifications and operating instructions, or the safety of the
equipment may be impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating information,
and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a lid
interlock.
If a screw is present, connect it to safety earth ground using the wire recommended in the user documentation.
The symbol on an instrument indicates that the user should refer to the operating instructions located in the user documentation.
The symbol on an instrument shows that it can source or measure 1000V or more, including the combined effect of normal and
common mode voltages. Use standard safety precautions to avoid personal contact with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The symbol indicates a connection terminal to the equipment frame.
If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be properly
disposed of according to federal, state, and local laws.
The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read the
associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may invalidate the
warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits - including the power transformer, test leads,
and input jacks - must be purchased from Keithley Instruments. Standard fuses with applicable national safety approvals may be used if
the rating and type are the same. Other components that are not safety-related may be purchased from other suppliers as long as they
are equivalent to the original component (note that selected parts should be purchased only through Keithley Instruments to maintain
accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley Instruments
office for information.
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply cleaner
directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis
(e.g., a data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the
board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servicing.
Table of Contents
Section Topic Page
1 Getting Started ....................................................................................... 1-1
Overview..................................................................................................... 1-2
Applications ................................................................................................ 1-2
Performance features ................................................................................. 1-2
Warranty information .................................................................................. 1-2
Contact information..................................................................................... 1-2
Specifications.............................................................................................. 1-3
Inspection ................................................................................................... 1-3
Options and accessories ............................................................................ 1-3
Power supply overview............................................................................... 1-3
Remote display option ................................................................................ 1-5
Power-up .................................................................................................... 1-7
Line power connection ......................................................................... 1-7
Power-up sequence ............................................................................. 1-7
Fuse replacement ................................................................................ 1-8
Display modes ............................................................................................ 1-8
Default settings ......................................................................................... 1-11
Setups - Save, Power-on, and Recall ................................................ 1-12
Menu......................................................................................................... 1-12
Getting around the MENU ........................................................................ 1-14
SCPI programming ................................................................................... 1-15
2 Basic Power Supply Operation .......................................................... 2-1
Test connections ........................................................................................ 2-2
Remote sense ...................................................................................... 2-5
Local sense .......................................................................................... 2-5
RFI considerations ............................................................................... 2-6
Outputting voltage and current ................................................................... 2-6
Setting voltage protection value ........................................................... 2-6
Selecting proper current range............................................................. 2-8
Selecting current limit mode................................................................. 2-8
Editing output voltage and current limit values..................................... 2-9
Using the OPERATE key.................................................................... 2-11
Output bandwidth...................................................................................... 2-11
Output impedance .................................................................................... 2-12
Changing the battery channel’s output impedance ............................ 2-12
SCPI programming - outputting voltage and current ................................ 2-13
Command notes (outputting voltage and current).............................. 2-14
Reading back V and I ............................................................................... 2-16
V and I display modes (Single or Dual)............................................. 2-16
Measurement configuration................................................................ 2-16
SCPI programming — measure V and I, and DVM input ......................... 2-17
Command notes (measure V and I, and DVM input) ......................... 2-18
Independent voltage measurements (DVM) ............................................. 2-18
DVM input display mode .................................................................... 2-18
Measurement configuration................................................................ 2-19
SCPI programming - DVM........................................................................ 2-19
Sink operation........................................................................................... 2-19
Table of Contents Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section Topic Page
Programming examples ............................................................................ 2-21
Outputting and reading back V and I .................................................. 2-21
DVM measurements ........................................................................... 2-21
Analog output............................................................................................ 2-22
3 Pulse Current Measurements.............................................................. 3-1
Overview ..................................................................................................... 3-2
Trigger level.......................................................................................... 3-2
Trigger delay......................................................................................... 3-3
Integration times ................................................................................... 3-3
Average readings count........................................................................ 3-4
Measurement configuration......................................................................... 3-4
Current range ....................................................................................... 3-5
Integration times ................................................................................... 3-5
Average readings count........................................................................ 3-5
Trigger delay and trigger level .............................................................. 3-6
Pulse current display mode .................................................................. 3-7
Pulse current measurement procedure....................................................... 3-7
No pulses detected ............................................................................... 3-8
Determining correct trigger level (pulse current)................................... 3-9
TRIG NOT DETECTED message....................................................... 3-11
SCPI programming - pulse current measurements................................... 3-12
Command notes (pulse current measurements) ................................ 3-14
Using FAST, SEARch, and DETect..................................................... 3-16
Pulse current digitization ........................................................................... 3-19
Pulse current step method ........................................................................ 3-20
TLEV steps ......................................................................................... 3-21
Timeout setting ................................................................................... 3-25
Integration time ................................................................................... 3-25
Range with pulse current step ............................................................ 3-26
Programming examples ............................................................................ 3-26
Pulse current measurements.............................................................. 3-26
Pulse current digitization .................................................................... 3-27
Pulse current STEP method (battery channel only)............................ 3-27
4 Long Integration Measurements ........................................................ 4-1
Overview ..................................................................................................... 4-2
Integration time ..................................................................................... 4-3
Trigger edge ......................................................................................... 4-3
Trigger level.......................................................................................... 4-3
Pulse timeout........................................................................................ 4-4
Measurement configuration......................................................................... 4-6
Current range ....................................................................................... 4-6
Integration time ..................................................................................... 4-6
Pulse timeout........................................................................................ 4-7
Trigger edge and trigger level............................................................... 4-7
Long integration display mode.............................................................. 4-8
Long integration measurement procedure.................................................. 4-8
General notes ....................................................................................... 4-9
Determining correct trigger level (long integration)............................... 4-9
SCPI programming.................................................................................... 4-11
Command notes (long integration measurements)............................. 4-12
Using FAST, SEARch, and DETect..................................................... 4-12
Programming examples ............................................................................ 4-16
5 Relay Control .......................................................................................... 5-1
Overview ..................................................................................................... 5-2
Connections ................................................................................................ 5-3
Controlling relays ........................................................................................ 5-4
SCPI programming...................................................................................... 5-5
ii 2308-900-01 Rev. A / July 2008
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Table of Contents
Section Topic Page
6 GPIB Operation....................................................................................... 6-1
Introduction ................................................................................................. 6-2
GPIB bus connections................................................................................. 6-2
Primary address .......................................................................................... 6-3
Setting the GPIB timeout for responses...................................................... 6-4
Long integration readings ..................................................................... 6-4
Pulse current readings.......................................................................... 6-4
MAV (Message Available Bit) ............................................................... 6-4
General bus commands .............................................................................. 6-5
REN (remote enable)............................................................................ 6-5
IFC (interface clear).............................................................................. 6-6
LLO (local lockout)................................................................................ 6-6
GTL (go to local) ................................................................................... 6-6
DCL (device clear) ................................................................................ 6-6
SDC (selective device clear)................................................................. 6-6
GET (group execute trigger)................................................................. 6-6
SPE, SPD (serial polling)...................................................................... 6-6
Front panel aspects of GPIB operation ....................................................... 6-6
Remote indicator and LOCAL key ........................................................ 6-7
Error and status messages................................................................... 6-7
Programming syntax ................................................................................... 6-7
Command words................................................................................... 6-7
Program messages............................................................................... 6-9
Response messages .......................................................................... 6-11
Message exchange protocol............................................................... 6-12
7 Status Structure...................................................................................... 7-1
Overview ..................................................................................................... 7-2
Status byte and SRQ ............................................................................ 7-2
Status register sets ............................................................................... 7-2
Queues ................................................................................................. 7-2
Clearing registers and queues .................................................................... 7-3
Programming and reading registers............................................................ 7-4
Programming enable registers.............................................................. 7-4
Reading registers.................................................................................. 7-5
Status byte and service request (SRQ)....................................................... 7-5
Status byte register ............................................................................... 7-6
Service request enable register............................................................ 7-7
Serial polling and SRQ ......................................................................... 7-7
Status byte and service request commands ......................................... 7-8
Status register sets...................................................................................... 7-8
Register bit descriptions ....................................................................... 7-8
Condition registers .................................................................................... 7-12
Event registers.................................................................................... 7-12
Event enable registers........................................................................ 7-13
Queues...................................................................................................... 7-14
Output queue...................................................................................... 7-15
Error queue......................................................................................... 7-15
Programming example - read error queue.......................................... 7-16
8 Common Commands ............................................................................ 8-1
Overview ..................................................................................................... 8-2
IEEE-488.2 common commands and queries............................................. 8-2
*IDN? .................................................................................................... 8-2
*OPC..................................................................................................... 8-3
*SAV <NRf> and RCL <NRf> ............................................................... 8-3
*RST ..................................................................................................... 8-4
*TRG..................................................................................................... 8-4
*TST?.................................................................................................... 8-4
*WAI...................................................................................................... 8-4
2308-900-01 Rev. A / July 2008 iii
Table of Contents Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section Topic Page
9 Measurement Commands and
Optimizing Measurement Speed ........................................................ 9-1
Overview ..................................................................................................... 9-2
Command notes: Signal-oriented measurement commands
and queries........................................................................................... 9-3
Optimizing measurement speed ................................................................. 9-5
Auto Zero State..................................................................................... 9-5
Programming examples........................................................................ 9-6
GPIB 488.1 protocol.................................................................................... 9-7
Selecting the 488.1 protocol ................................................................. 9-7
Protocol differences.............................................................................. 9-8
Trigger on talk both channels ...................................................................... 9-9
Bus commands................................................................................... 9-10
Command notes ................................................................................. 9-10
Trigger continuous mode........................................................................... 9-10
Bus commands................................................................................... 9-10
Command notes ................................................................................. 9-11
Using trigger continuous mode........................................................... 9-11
Programming sequence example....................................................... 9-11
10 DISPlay and FORMat ........................................................................... 10-1
DISPlay subsystem ................................................................................... 10-2
Command notes (SCPI commands - display)..................................... 10-2
FORMat subsystem .................................................................................. 10-4
Command notes (SCPI commands - data format).............................. 10-5
11 SCPI Tables............................................................................................ 11 -1
SCPI command subsystems reference tables .......................................... 11-2
General notes ..................................................................................... 11-2
DISPlay command summary .............................................................. 11-3
FORMat command summary.............................................................. 11 -4
OUTPut command summary .............................................................. 11-5
SENSe command summary .............................................................. 11-6
SOURce command summary........................................................... 11 -13
STATus command summary............................................................. 11- 14
SYSTem command summary ........................................................... 11-15
12 Performance Verification.................................................................... 12-1
Introduction ............................................................................................... 12-2
Verification test requirements.................................................................... 12-2
Environmental conditions.................................................................... 12-2
Warm-up period .................................................................................. 12-2
Line power .......................................................................................... 12-3
Recommended test equipment ................................................................. 12-3
Resistor connections .......................................................................... 12-3
Resistor considerations ...................................................................... 12-4
Verification limits ....................................................................................... 12-4
Example limits calculation................................................................... 12-4
Performing the verification test procedures............................................... 12-4
Test summary ..................................................................................... 12-4
Test considerations ............................................................................. 12-5
Output voltage accuracy ........................................................................... 12-5
Voltage readback accuracy ....................................................................... 12-7
Compliance current accuracy.................................................................... 12-8
Current readback accuracy ....................................................................... 12-9
5 A range readback accuracy ............................................................. 12-9
500 mA range readback accuracy.................................................... 12-10
50 mA range readback accuracy...................................................... 12-12
5 mA range readback accuracy........................................................ 12-13
Digital voltmeter input accuracy .............................................................. 12-15
iv 2308-900-01 Rev. A / July 2008
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Table of Contents
Section Topic Page
13 Calibration.............................................................................................. 13-1
Introduction ............................................................................................... 13-2
Environmental conditions.......................................................................... 13-2
Temperature and relative humidity...................................................... 13-2
Warm-up period .................................................................................. 13-2
Line power .......................................................................................... 13-2
Calibration considerations......................................................................... 13-2
Calibration cycle ................................................................................. 13-3
Recommended calibration equipment....................................................... 13-3
Resistor connections .......................................................................... 13-3
Resistor considerations ...................................................................... 13-3
Front panel calibration............................................................................... 13-4
Step 1: Prepare the Model 2308 for calibration .................................. 13-4
Step 2: Perform battery channel calibration steps .............................. 13-5
Step 3: Perform charger channel calibration steps............................. 13-9
Step 4: Enter calibration dates, and save calibration........................ 13-10
Remote calibration .................................................................................. 13-11
Remote calibration display................................................................ 13-11
Remote calibration procedure........................................................... 13-11
Step 1: Prepare the Model 2308 for calibration ................................ 13-11
Step 2: Perform battery channel calibration steps ............................ 13-12
Step 3: Perform charger channel calibration steps........................... 13-13
Step 4: Program calibration date ...................................................... 13-14
Step 5: Save calibration constants and lock out calibration.............. 13-14
Changing the calibration code................................................................. 13-15
Changing the code from the front panel ........................................... 13-16
Changing the code by remote........................................................... 13-16
Resetting the calibration code .......................................................... 13-16
Viewing calibration date and count ......................................................... 13-17
Viewing date and count from the front panel .................................... 13-17
Acquiring date and count by remote................................................. 13-17
Appendix Topic Page
A Error and Status Messages ................................................................ A-1
Error and status message definitions......................................................... A-2
B Calibration Reference .......................................................................... B-1
Introduction ................................................................................................ B-2
Command summary ............................................................................ B-2
Miscellaneous commands.......................................................................... B-2
Detecting calibration errors ........................................................................ B-5
Reading the error queue...................................................................... B-5
Error summary..................................................................................... B-5
Status byte EAV (Error Available) bit ................................................... B-6
Generating an SRQ on error................................................................ B-6
Detecting calibration step completion ........................................................ B-6
Using the *OPC command................................................................... B-7
Using the *OPC? query ....................................................................... B-7
Generating an SRQ on calibration complete ....................................... B-7
2308-900-01 Rev. A / July 2008 v
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List of Figures
Section Figure Title Page
1 Figure 1-1 Model 2308 front panel ................................................................. 1-4
1 Figure 1-2 Model 2308 rear panel................................................................... 1-4
1 Figure 1-3 Simplified power supply diagram .................................................. 1-5
1 Figure 1-4 Model 2306-DISP Remote display option...................................... 1-6
1 Figure 1-5 Fuse drawer location .................................................................... 1-8
2 Figure 2-1 Battery channel preferred connection (maximum stability) ............ 2-3
2 Figure 2-2 Battery channel fastest transient response connection ................. 2-4
2 Figure 2-3 Charger channel 4-wire remote sense connection
from the DUT to the ouput ............................................................. 2-5
2 Figure 2-4 Local Sense Connections (battery channel and
charger channel)............................................................................ 2-6
2 Figure 2-5 Charger Control Circuit Testing.................................................... 2-19
2 Figure 2-6 Sink operation.............................................................................. 2-20
2 Figure 2-7 Preferred method ........................................................................ 2-20
2 Figure 2-8 Analog output Connections.......................................................... 2-22
3 Figure 3-1 Pulse current measurement........................................................... 3-2
3 Figure 3-2 Trigger delay for high pulse current measurement ........................ 3-3
3 Figure 3-3 Determining voltage and current characteristics for
battery channel .............................................................................. 3-9
3 Figure 3-4 Determining voltage and current characteristics for
charger channel .......................................................................... 3-10
3 Figure 3-5 PCURrent and SEARch time for pulse high measurement ......... 3-17
3 Figure 3-6 Sample pulse forms for step method........................................... 3-22
3 Figure 3-7 Sample one-shot only pulses for step method............................. 3-22
3 Figure 3-8 Sample :STEP Pulse measurement ............................................ 3-23
3 Figure 3-9 Pulse form with rise and fall steps ............................................... 3-23
3 Figure 3-10 Pulse form with down steps first (600msec step duration) .......... 3-24
4 Figure 4-1 Steady state for waveforms based on low pulse times .................. 4-3
4 Figure 4-2 Long integration, search, and reading time comparison ................ 4-5
4 Figure 4-3 TOUT and search time ................................................................ 4-13
5 Figure 5-1 External source relay control ......................................................... 5-3
5 Figure 5-2 Internal source relay control .......................................................... 5-3
5 Figure 5-3 Relay connector (9-pin D-sub)....................................................... 5-4
6 Figure 6-1 IEEE-488 connector....................................................................... 6-2
6 Figure 6-2 Daisy chaining ............................................................................... 6-3
7 Figure 7-1 Status model structure................................................................... 7-3
7 Figure 7-2 Status byte and service request..................................................... 7-6
7 Figure 7-3 Standard event status .................................................................... 7-9
7 Figure 7-4 Operation event status................................................................. 7-10
7 Figure 7-5 Measurement event status .......................................................... 7-11
7 Figure 7-6 Questionable event status ........................................................... 7-12
10 Figure 10-1 IEEE-754 single precision data format ........................................ 10-5
10 Figure 10-2 IEEE-754 double precision data format ....................................... 10-6
12 Figure 12-1 Connections for voltage verification tests .................................... 12-6
List of Figures Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section Figure Title Page
12 Figure 12-2 Connections for output current and 5 A range current
verification tests ........................................................................... 12-8
12 Figure 12-3 Battery channel connections for 500 mA current
verification tests ......................................................................... 12-11
12 Figure 12-4 Battery channel connections for 50 mA current
verification tests ......................................................................... 12-12
12 Figure 12-5 Connections for 5 mA current verification tests.......................... 12-14
12 Figure 12-6 Charger channel connections for DVM accuracy verification..... 12-15
13 Figure 13-1 Battery channel connections for voltage calibration ................... 13-6
13 Figure 13-2 Connections for 5 A, 500 mA, and 50 mA current calibration ...... 13-7
13 Figure 13-3 Connections for 5 mA range calibration....................................... 13-8
13 Figure 13-4 Charger channel connections for voltage calibration ................... 13-9
vii 2308-900-01 Rev. A / July 2008
List of Tables
Section Table Title Page
1 Table 1-1 Display Modes ............................................................................... 1-9
1 Table 1-2 Display mode examples............................................................... 1-10
1 Table 1-3 Factory defaults (RST)................................................................. 1-11
1 Table 1-4 Main MENU structure .................................................................. 1-13
2 Table 2-1 Current ranges............................................................................... 2-8
2 Table 2-2 Output bandwidth channel setting ............................................... 2-11
2 Table 2-3 SCPI command summary - outputting voltage and current......... 2-13
2 Table 2-4 SCPI commands: Measure V and I, and DVM input.................... 2-17
3 Table 3-1 Current range and trigger level settings......................................... 3-6
3 Table 3-2 TRIG NOT DETECTED message................................................ 3-11
3 Table 3-3 SCPI commands - pulse current measurements ......................... 3-12
3 Table 3-4 PCURrent FAST, SEARch, and DETect commands .................... 3-18
3 Table 3-5 Setting UP and DOWN commands.............................................. 3-21
3 Table 3-6 Trigger Level Setting.................................................................... 3-22
3 Table 3-7 Sample TLEV values ................................................................... 3-23
3 Table 3-8 Sample integration times ............................................................. 3-25
4 Table 4-1 TRIG NOT DETECTED message................................................ 4-10
4 Table 4-2 SCPI commands - long integration measurements ..................... 4-11
4 Table 4-3 FAST, SEARch, and DETect command reference ....................... 4-14
5 Table 5-1 Relay pinouts ................................................................................. 5-4
5 Table 5-2 SCPI command - output relay control............................................ 5-5
6 Table 6-1 General bus commands................................................................. 6-5
7 Table 7-1 Common and SCPI commands - reset registers and
clear queues .................................................................................. 7-4
7 Table 7-2 16-bit status register ...................................................................... 7-5
7 Table 7-3 Common and SCPI Commands - status byte and
service request enable registers.................................................... 7-8
7 Table 7-4 Common and SCPI commands - condition registers................... 7-12
7 Table 7-5 Common and SCPI commands - event registers ........................ 7-13
7 Table 7-6 Common and SCPI commands - event enable registers............. 7-13
7 Table 7-7 SCPI Commands - error queue ................................................... 7-16
8 Table 8-1 IEEE-488.2 common commands and queries ............................... 8-2
8 Table 8-2 *OPC and *OPC? commands........................................................ 8-3
9 Table 9-1 Signal-oriented measurement command summary ....................... 9-2
9 Table 9-2 Trigger on talk bus commands..................................................... 9-10
9 Table 9-3 Trigger continuous bus commands.............................................. 9-10
9 Table 9-4 Trigger continuous mode programming example ........................ 9-11
10 Table 10-1 SCPI commands - display ........................................................... 10-2
10 Table 10-2 SCPI commands - data format .................................................... 10-4
11 Table 11-1 DISPlay command summary ....................................................... 11-3
11 Table 11-2 FORMat command summary....................................................... 11-4
11 Table 11-3 OUTPut command summary ....................................................... 11-5
11 Table 11-4 SENSe command summary ........................................................ 11 -6
11 Table 11-5 SOURce command summary .................................................... 11-13
List of Tables Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Section Table Title Page
11 Table 11-6 STATus command summary ...................................................... 11 -14
11 Table 11-7 SYSTem command summary..................................................... 11-15
12 Table 12-1 Recommended verification equipment ......................................... 12-3
12 Table 12-2 Output voltage accuracy limits ..................................................... 12-6
12 Table 12-3 Voltage readback accuracy limits................................................. 12-7
12 Table 12-4 Compliance current accuracy limits ............................................. 12-9
12 Table 12-5 5 A range current readback accuracy limits ............................... 12-10
12 Table 12-6 500 mA range current readback accuracy limits ........................ 12-11
12 Table 12-7 50 mA range current readback accuracy limits .......................... 12-13
12 Table 12-8 5 mA range current readback accuracy limits ............................ 12-14
12 Table 12-9 Digital voltmeter input accuracy limits ........................................ 12-16
13 Table 13-1 Recommended calibration equipment.......................................... 13-3
13 Table 13-2 Model 2308 front panel calibration summary ............................... 13-4
13 Table 13-3 Remote calibration summary ..................................................... 13-14
Appendix Table Title Page
A Table A-1 Error and status messages (all models)........................................ A-2
B Table B-1 Remote calibration command summary........................................ B-2
B Table B-2 Calibration errors........................................................................... B-6
ix 2308-900-01 Rev. A / July 2008
In this section:
Section 1
Getting Started
Topi c Page
Overview ..................................................................................................... 1-2
Applications................................................................................................. 1-2
Performance features ................................................................................. 1-2
Warranty information................................................................................... 1-2
Contact information..................................................................................... 1-2
Specifications.............................................................................................. 1-3
Inspection.................................................................................................... 1-3
Options and accessories............................................................................. 1-3
Power supply overview ............................................................................... 1-3
Remote display option ................................................................................ 1-5
Power-up..................................................................................................... 1-7
Line power connection ......................................................................... 1-7
Power-up sequence ............................................................................. 1-7
Fuse replacement................................................................................. 1-8
Display modes ............................................................................................ 1-8
Default settings ......................................................................................... 1-11
Setups - Save, Power-on, and Recall................................................. 1-12
Menu ......................................................................................................... 1-12
Getting around the MENU......................................................................... 1-14
SCPI programming ................................................................................... 1-15
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Overview
This manual describes Keithley Instruments Model 2308 Portable Device Battery/Charger
Simulator, which is designed specifically for development and high-speed production testing of DC
battery-operated products.
Applications
Development and high speed testing of DC battery-operated products, such as:
• Cellular handsets
• Cellular components like RFIC power amplifiers
• Other high-volume precision electrical components.
Performance features
Key features and benefits include:
• The Model 2308 is a specialized power supply that has a very fast recovery to large, near
instantaneous load current transitions. Conventional power supplies do not have this
capability. The Model 2308 is designed specifically to respond to large load changes and
very short pulsed loads with small transient voltage drop and a very fast recovery time.
Typical devices that have these types of characteristic loads are mobile phones, wireless
communication modules, and other portable, battery operated devices. The Model 2308 can
maintain a near-constant output, even under quickly-changing load conditions.
• The power supply can measure a wide range of load currents. It can resolve down to 0.1 μA
and measure up to 5 A. It has fast measurement capability as well and can measure load
current pulses as narrow as 50
• The Model 2308 can simulate the output of a battery. Its programmable output resistance
can simulate a battery’s internal resistance so that the voltage output looks exactly like that
of a battery’s output.
• The two channels can also sink current so that one channel (the battery channel) simulates
a discharged battery, while the other channel (the charger channel) can be used to simulate
a charger.
μsec.
NOTE Information contained in this section applies to all power supply channels
(unless otherwise noted). In this manual, Channel 1 refers to the battery
channel, Channel 2 refers to the charger channel.
Warranty information
Warranty information is located at the front of this manual. Should your power supply require
warranty service, contact the Keithley Instruments representative or authorized repair facility in
your area for further information. When returning the instrument for repair, be sure to fill out and
include the service form at the back of this manual to provide the repair facility with the necessary
information.
Contact information
If you have any questions after reviewing this information, please contact your local Keithley
representative or call one of our Applications Engineers at 1-800-348-3735 (U.S. and Canada
1-2 Return to Section Topics 2308-900-01 Rev. A / July 2008
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Section 1: Getting Started
only). A complete list of worldwide phone numbers are available on the Keithley Instruments
website at
www.keithley.com.
Specifications
Full Model 2308 specifications are included on the Model 2308 Portable Device Battery/Charger
Simulator Product Information CD-ROM. Check the Keithley Instruments website at
www.keithley.com for the latest updates to the specifications.
Inspection
The power supply was carefully inspected electrically and mechanically before shipment. After
unpacking all items from the shipping carton, check for any obvious signs of physical damage that
may have occurred during transit
NOTE There may be a protective film over the display lens, which can be removed.
Report any damage to the shipping agent immediately. Save the original packing carton for
possible future shipment. The following items are included with every order:
.
• Model 2308 Portable Device Battery/Charger Simulator with line cord
• Quick Disconnect Connector (2)
• Accessories as ordered
• Certificate of calibration
• Product Information CD-ROM that contains PDFs of Model 2308 User’s Manual and Model
2308 Quick Start Guide
Any improvements or changes concerning the instrument or manual will be explained in an
addendum included with the manual. Be sure to note these changes and incorporate them into the
manual.
Options and accessories
The following options and accessories are available for the power supply.
• 2306-DISP remote display unit
• Low inductance coaxial cable (SC-182)
• Single fixed rack mount kit (P/N 4288-1)
• Dual fixed rack mount kit (P/N 4288-2)
• IEEE-488 Interface for PCI bus (P/N KPCI-488LP)
• USB to GPIB adapter interface (P/N KUSB-488A)
• Double shielded premium GPIB cable, 0.5 m (1.6 ft) (P/N 7007-05)
• Double shielded premium GPIB cable, 1 m (3.2 ft) (P/N 7007-1)
• Double shielded premium GPIB cable, 2 m (6.5 ft) (P/N 7007-2)
• Double shielded premium GPIB cable, 3 m (10 ft) (P/N 7007-3)
• Double shielded premium GPIB cable, 4 m (13 ft) (P/N 7007-4)
Power supply overview
The Model 2308 power supply (see Figure 1-1) can simulate a battery channel (#1) or a charger
channel (#2). Figure 1-1 and Figure 1-2 show the Model 2308 front and rear panels.
2308-900-01 Rev. A / July 2008 Return to Section Topics 1-3
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
POWER
DISPLAY
OPERATE
ENTER
SET
MENU
LOCAL
2308 Portable Device Battery/Charger Simulator
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
MADE IN
U.S.A.
LINE RATING
100-120VAC, 200-240VAC
50, 60 HZ 165VA MAX
LINE FUSE
SLOWBLOW
2.0A, 250V
IEEE-488
(ENTER IEEE ADDRESS
FROM FRONT PANEL MENU)
REMOTE
DISPLAY
OPTION
+++
___
SOURCE SENSE
SOURCE
OUTPUT #1
ISOLATION FROM EARTH: 22 VOLTS MAX MAX.
RELAY
CONTROL
24VDC MAX
DVM IN
-30 VDC MAX
ANALOG
OUT
mA
(5/50)A(0.5/5)
+++
____
+
SOURCE SENSE
DVM IN
SOURCE
OUTPUT #2
Figure 1-1
Model 2308 front panel
Figure 1-2
Model 2308 rear panel
NOTE The output from each channel is isolated from the other channel.
CAUTION Allow for adequate ventilation around the front and rear-panel openings to
prevent the unit from overheating which may degrade performance.
Make sure that the maximum combined channel output is not exceeded (see complete
Specifications at
sink. For output voltages exceeding 5 V, the maximum sink current is less than 3 A (derate the
maximum sink current 0.2 A for each volt over 5 V).
www.keithley.com). Also, do not exceed 3 A when using the power supply as a
NOTE When using the power supply as a sink (negative polarity), the power supply is
dissipating rather than sourcing power (see
1-4 Return to Section Topics 2308-900-01 Rev. A / July 2008
Sink operation).
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Section 1: Getting Started
Battery Channel
(Channel #1)
Source
+
_
V-Source
with I-Limit
I meter
V meter
Charger Channel
(Channel #2)
Source
+
_
V-Source
with I-Limit
I meter
V meter
+
_
Digital
Voltmeter
DVM
Shunt
Current
Monitors
5/50mA
0.5/5A
A simplified diagram of the power supply is shown in Figure 1-3. Note that it can read back the
output voltage (V
) and current (I
meter
). Display resolution for voltage readback is 1mV.
meter
The battery channel (#1) has four current ranges: 5 A, 500 mA, 50 mA and 5 mA. The charger has
5 A and 5 mA. The resolution on 5 A is 100 μA, and on 5 mA is 0.1 μA. The 500 mA is 10 μΑ and
50 mA is 1μΑ.
The power supply also has a digital voltmeter (DVM - on the charger channel only) that is
independent of the power supply circuit. The DVM can measure up to +30 V (1 mV resolution).
The power supply has analog output pins that allow acquisition of the load current waveform for indepth analysis on the battery channel only (see
Analog output for more information).
When used with a pulsed load, the power supply can read back peak current, idle current, and
average current (see
Section 3 for details). A long integration (up to 60 seconds) function is
provided to measure average current of a low frequency pulse (long period) or a series of pulses
(see
Section 4 for details).
Figure 1-3
Simplified power supply diagram
Remote display option
If you are mounting the power supply in a location where the display cannot be seen or the
controls are not easily accessible, use this option (see
Figure 1-4). This remote display module
2308-900-01 Rev. A / July 2008 Return to Section Topics 1-5
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
ET
A
R
EP
O
R
E
TNE
T
E
S
Y
AL
P
SID
U
N
EM
LACOL
YALPS
I
D
E
TOMER
PSID-603
2
includes all front-panel instrument controls/features (with the exception of power). All features and
menus work as described for the Model 2308. A 9-foot cable attaches the remote display to the
rear-panel of the power supply, allowing the unit to be operated remotely.
Figure 1-4
Model 2306-DISP Remote display option
Plug the remote display module into the rear-panel connector labeled REMOTE DISPLAY
OPTION (see rear panel in
Figure 1-2). When plugged in, the main display module is disabled with
the following message displayed:
REMOTE PANEL
ENABLED
When the remote display module is unplugged, control returns to the main display module.
NOTE When using the remote display, VFD BRIGHTNESS may not appear in the main
menu (dependent on the firmware revision in the unit).
When connecting or disconnecting the remote display, allow a few seconds for
the power supply to recognize the action. Fast, repeated connects/disconnects
of the remote display may cause the power supply to hang or appear to hang.
Disconnecting the remote display and waiting a few seconds to reconnect it may
clear the problem. If not, cycling power on the power supply clears the condition.
1-6 Return to Section Topics 2308-900-01 Rev. A / July 2008
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Section 1: Getting Started
Power-up
Line power connection
The power supply operates from a line voltage in the range of 100-120VAC/200-240VAC at a
frequency of 50 or 60 Hz, 165 V AC. Line voltage and frequency are automatically sensed,
therefore there are no switches to set. Check to see that the line power in your area is compatible.
Use the
NOTE See complete Specifications at www.keithley.com for the operating environment
Perform the following steps to connect the power supply to the line power and turn it on:
WARNING The power cord supplied with the Model 2308 contains a separate ground
:SYSTem::LFRequency? query (see Section 10) to read the line frequency.
requirements of the equipment before power-up.
for use with grounded outlets. When proper connections are made,
instrument chassis is connected to power line ground through the ground
wire in the power cord. Failure to use a grounded outlet may result in
personal injury or death due to electric shock.
1. Before plugging in the power cord, make sure the front-panel power switch is in the off (0)
position.
2. Connect the female end of the supplied power cord to the AC receptacle on the rear panel.
3. Turn on the power supply by pressing the front-panel power switch to the on (1) position.
Power-up sequence
On power-up, the power supply performs self-tests on its RAM and EPROM. After a blinking cursor
appears on line one, RAM tests are completed. After a blinking cursor appears on line two,
EPROM self tests are completed.
NOTE If a problem develops while the instrument is under warranty, return it to Keithley
Instruments for repair.
If the instrument passes the self tests, the following information is briefly
displayed:
• Top Line - The model number and the IEEE-488 address are displayed
(The factory default GPIB address is 16).
• Bottom Line - Firmware revision levels are displayed for the main board
and the display board. Also displayed is the detected line frequency.
After displaying the above information, any errors that occurred during the startup sequence will be
displayed. Then, the instrument goes to the default settings (*RST) or saved power-up settings
(SAV0-3) with the output off (see
over the bus using the :SYST:ERR? command (see Error queue).
Default settings). Any missed error messages may be viewed
2308-900-01 Rev. A / July 2008 Return to Section Topics 1-7
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
LINE RATING
100-120VAC, 200-240VAC
50, 60 HZ 165VA MAX
LINE FUSE
SLOWBLOW
2.0A, 250V
REMOTE
DISPLAY
OPTION
DVM IN
-30 VDC MAX
+++
____
+
SOURCE SENSE
DVM IN
SOURCE
OUTPUT #2
Fuse drawer
Fuse replacement
A rear-panel fuse protects the power line input of the power supply.
To replace the line fuse:
1. Power off the unit and remove line cord.
2. The fuse drawer is located on the left side of the AC receptacle (see Figure 1-5). On the
right side of the fuse drawer is a small tab. At this location, use a screwdriver to pry the fuse
drawer open.
3. Slide the fuse drawer out to gain access to the fuse. Note that the fuse drawer does not pull
all the way out of the power module.
4. Snap the fuse out of the drawer and replace it with the same type (250 V, 2.0 A, 5 × 20 mm
time lag). The Keithley Instruments part number is FU-81.
CAUTION For continued protection against fire or instrument damage, only replace the
fuse with the type and rating listed. If the instrument repeatedly blows fuses,
locate and correct the cause of the problem before replacing the fuse.
5. Push the fuse drawer back into the power module.
Display modes
1-8 Return to Section Topics 2308-900-01 Rev. A / July 2008
Figure 1-5
Fuse drawer location
For voltage and current readings, there are five display modes described as follows:
• SINGLE V AND I DISPLAY - This display mode is used to read back the actual output
voltage and current on a single channel. The active channel dictates if the single channel
being displayed is for the battery or charger channel. This display mode is the RST default
(see
Section 2 for details).
• DUAL V AND I DISPLAY - This display mode is used to read back the actual output voltage
and current for both channels simultaneously. The top display line shows the voltage and
current readings for the battery channel while the bottom line shows the charger channel
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Section 1: Getting Started
▲
▲
readings. The # symbol indicates the active channel (see Section 2 for details). For both
channels, the output state is indicated by:
• 0 (zero) if the output is OFF for that channel.
• l (lowercase L) if the output is ON for that channel..
NOTE With DUAL V AND I DISPLAY mode enabled, there is no indicator on the front
panel about voltage protection or current limit state. See
Section 2 for more
information on voltage protection and current limit.
• PULSE CURRENT - This mode is used to display high, low, or average pulse-current
measurements (see
Section 3 for details)
• LONG INTEGRATION - This mode is used to display average current measurements of a
pulse or pulses measuring periods between 850 msec to 60 sec (60 Hz line frequency) and
840 msec to 60 sec (50 Hz line frequency) (see
Section 4 for details).
• DVM INPUT (charger channel only) - This mode is used to display the DC voltage applied to
the DVM input of the power supply (see
Section 2 for details).
Use the SAVE SETUP item of the MENU to save the selected display mode in memory, and use
the POWER ON SETUP item to specify the power-on setup (
Setups - Save, Power-on, and Recall
for details). The Dual V and I display cannot be saved. A reset will not change this setting.
Recalling a setup may change the setting. If setup recalling has a channel function set to
something other than voltage or current then this setting is disabled otherwise the setting is left
unchanged.
Selecting (enabling) Dual V and I will switch the function to voltage for each channel unless the
function is already voltage or current. Dual V and I will be disabled if you change the display mode
on either channel to be Pulse Current, Long Integration, or DVM Input (Channel #2 only).
To select a display mode:
1. Press the DISPLAY key.
2. Press the
▲ or ▼ keys to scroll to the desired display mode.
Table 1-1
Display Modes
Battery channel (#1) Charger channel (#2)
• SINGLE V AND I
• DUAL V AND I
• LONG INTEGRATION
• PULSE CURRENT
3. Press the
NOTE Switching back to the original active channel will display the initial setting for that
or keys to select Channel #1 or #2.
channel.
• SINGLE V AND I
• DUAL V AND I
• LONG INTEGRATION
• PULSE CURRENT
• DVM INPUT
4. With the desired mode and active channel displayed, press ENTER.
2308-900-01 Rev. A / July 2008 Return to Section Topics 1-9
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Examples of the display modes are shown in Table 1-2.
NOTE To select PULSE CURRENT high (HI), low (LO) or average (AVG) readings,
use the
▲ or ▼ keys to select the desired pulse measurement after selecting
pulse current as the display mode.
Table 1-2
Display mode examples
Samples for battery
Display mode
SINGLE V AND I: 6.116V #1 ON 6.116 V #2 ON Section 2
DUAL V AND I: 2.97V 25.7m 1# 2.97V 25.7m 1
DVM input: N/A
Pulse current: PULSE HI #1 ON PULSE HI #2 ON Section 3
Long integration: LONG INT #1 ON LONG INT #2 ON Section 4
channel (#1)
1.2058 A 1.2058 A
0.00V 0.00A 0 1.00V 0.17A 1#
(charger channel only)
2.1947 A 2.1947 A
PULSE LO #1 ON PULSE LO #2 ON
0.2147 A 0.2147 A
PULSE AVG #1 ON PULSE AVG #2 ON
1.1495 A 1.1495 A
1.0236 A 1.0236 A
Samples for charger
channel (#2) Reference
Section 2
DVM INPUT #2 OFF
5.321 V
Section 2
NOTE #1 or #2 indicates the active channel. ON indicates that the output is turned on.
With the output turned off, OFF is displayed (see
Section 2 for details on
outputting current and voltage).
NO PULSE is displayed if the output is OFF or pulses are not detected (output
ON) for pulse current and long integration display modes only.
When a change is made that affects the readings being taken, dashes are
displayed instead of readings. The dashes remain until a valid reading for the
new condition is taken.
1-10 Return to Section Topics 2308-900-01 Rev. A / July 2008
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Section 1: Getting Started
Default settings
The power supply can be set to power-on with the factory default conditions (RST defaults) or to
one of four user-saved setup conditions (SAV0 to SAV3). The factory default conditions are listed
in
Table 1-3.
Table 1-3
Factory defaults (RST)
Reset (RST) default
Setting Battery channel (#1) Charger channel (#2)
Output value
settings:
Voltage (V) 0.000V 0.000V
Current (A) 0.2500A 0.2500A
Output state
(operate)
Voltage protection 8 V, clamp off 8 V, clamp off
Display type Single V and I Single V and I
GPIB address* No effect (factory set to 16)
Current range 5 A (Auto Range OFF) 5 A (Auto Range OFF)
Integration rate 1.00 PLC 1.00 PLC
Average readings 1 1
Power on setup* No effect (factory set to RST)
Current limit mode LIM LIM
Auto Zero State ON (applies to both channels)
Output relay one*
Output relay two*
Output relay three*
Output relay four*
VFD brightness*
Output bandwidth LOW LOW
Output impedance 0.00 Ω Not Applicable
Pulse current:
High time 33 µsec 33 µsec
Low time 33 µsec 33 µsec
Average time 33 µsec 33 µsec
Digitize time 33 µsec 33 µsec
Timeout 1.000 sec 1.000 sec
Average readings 1 1
Trigger delay 0.00000 sec 0.00000 sec
Trigger level: 0 0
Step Off
Step Initial 2 sec
Step Sequence 0
Step Length 0
Step Skip 0
Step up 1
Step down 1
Step time 200µs
Step timeout 2ms
Step delay 0
Long integration:
Integration time 1 second 1 second
**Global settings (not channel-specific).
OFF OFF
No effect (after power
cycle, set to zero)
Over bus: 1 From display: FULL BRIGHTNESS
2308-900-01 Rev. A / July 2008 Return to Section Topics 1-11
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Table 1-3
Factory defaults (RST)
Reset (RST) default
Setting Battery channel (#1) Charger channel (#2)
Pulse timeout 16 seconds 16 seconds
Trigger edge RISING RISING
Trigger level Same as “Trigger level” under Pulse Current
(above)
**Global settings (not channel-specific).
Same as “Trigger level” under
Pulse Current (above)
Setups - Save, Power-on, and Recall
Setups are configured by SAVE SETUP, POWER ON SETUP and RECALL SETUP items of the
MENU (which is accessed by pressing the MENU key). When a setup is saved, all settings that are
channel-specific settings will be saved to that setup. Saving/recalling a setup has no effect on
Global Settings (see Global settings in
channel-specific parameters from that setup.
NOTE Table 1-4 shows the menu structure. Rules to navigate the menu follow the
table.
Table 1-3). Similarly, recalling a setup loads only the
Menu
The setup MENU items are explained as follows:
• SAVE SETUP - Save the present power supply setup to a memory location;
SAV0-SAV3.
• RECALL SETUP - Return the power supply to the RST defaults (Table 1-3), or to one of
four user-saved setups; RST, SAV0-SAV3.
• POWER-ON SETUP - Select the setup to use at power-up; RST, SAV0-SAV3.
When powering up or recalling the SAV0, SAV1, SAV2, or SAV3 setup, the output will be OFF
regardless of the operate state when the setup was saved. For example, if the output is ON when
the setup is saved as SAV0, the power supply will power up with the output OFF for the SAV0
power-on setup.
NOTE For GPIB operation, the setups are saved and recalled using the *SAV, *RCL,
and
*RST commands (see Section 8 or details). The power-on setup is
selected using the SYSTem:POSetup command (see Section 10).
Many aspects of operation are configured from the menus summarized in Table 1-4. Use the rules
following the table to navigate through the menu structure.
NOTE The menu key is used to access the menu structure. However, if in remote for
IEEE-488 bus operation (“R” displayed below “ON/OFF”) the menu key returns
the instrument to LOCAL operation.
1-12 Return to Section Topics 2308-900-01 Rev. A / July 2008
Model 2308 Portable Device Battery/Charger Simulator User’s Manual Section 1: Getting Started
Table 1-4
Main MENU structure
Menu item Description Ref
GPIB ADDRESS
CURRENT RANGE #1/#2
NPLC RATE #1/#2
AVER READINGS #1/#2
SAVE SETUP
RECALL SETUP
POWER ON SETUP
CALIBRATE UNIT
VOLT PROTECT #1/#2
CURR LIM MODE #1/#2
AUTO ZERO STATE
OUTPUT RELAYS
REVISION NUMBER
SERIAL NUMBER
VFD BRIGHTNESS
OUT BANDWIDTH #1/#2
OUT IMPEDANCE #1
PULSE CURRENT #1/#2
HIGH TIME
LOW TIME
AVERAGE TIME
AUTO TIME
PULSE TIMEOUT
AVERAGE READINGS
TRIGGER DELAY
TRIGGER LEVEL
Set primary address (0 to 30)
Select current range:
Battery channel (#1) Charger channel (#2)
5 A 5 A
500 mA 5 mA
50 mA AUTO
5 mA
AUTO
Set integration rate in NPLC (0.002 to 10)
Set average reading count (1 to 10)
Save present setup in memory (SAV0–SAV3)
Recall setup from memory (RST, SAV0–SAV3).
Select power-on setup (RST, SAV0–SAV3)
Calibrate unit (see Calibration)
Set voltage protection range (0–8 V) and clamp (ON/OFF)
Select current limit mode (LIMit or TRIP)
Set auto zero state (ON/OFF)
Close (1) or open (0) relay control circuitry
Display firmware revision levels
Display serial number of the power supply
Set VFD display’s brightness level (OFF, FULL, 3/4, 1/2, 1/4)
Set bandwidth (HIGH, LOW)
Set battery channels impedance (0–1 Ω)
Pulse-current configuration.
Set high time integration rate (in µsec.).
Set low time integration rate (in µsec.).
Set average time integration rate (in µsec.).
Set pulse integration rates automatically.
Set pulse timeout (default is 1.000 second, incremented in
1ms steps)
Set average reading count (1 to 100).
Set trigger delay in seconds (0 to 100 msec).
Sets pulse current trigger level in Amps for the 5 A, 500 mA,
50 mA, or 5 mA current ranges:
Battery channel (#1) Charger channel (#2)
A(5.0) 0–5A in 5 mA steps A(5.0) 0–5 A in 5 mA steps
mA(500) 0–500 mA in 0.5 mA steps
mA (50) 0-50 mA in 0.05 mA steps
mA (5) 0-5 mA in 0.005 mA steps
Sect. 6
Sect. 2
Sect. 2
Sect. 2
Note 1
Note 1
Note 1
Sec. 13
Sect. 2
Note 2
Sect. 9
Sect. 5
Note 2
Note 3
Sect. 10
Sect. 2
Sect. 2
Sect. 3
The main menu structure is accessed by pressing the MENU key on the front panel.
Notes:
1. See Default settings in this section to save and recall setups.
2. Revision Number displays the firmware revision level for the microcontroller and the display.
3. Serial Number displays the serial number of the power supply.
2308-900-01 Rev. A / July 2008 Return to Section Topics 1-13
Section 1: Getting Started Model 2308 Portable Device Battery/Charger Simulator User’s Manual
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Table 1-4
Main MENU structure
Menu item Description Ref
LONG INTEGRAT #1/#2 Long integration configuration. Sect. 4
INTEGRATION TIME
AUTO TIME
PULSE TIMEOUT
TRIGGER EDGE
TRIGGER LEVEL
The main menu structure is accessed by pressing the MENU key on the front panel.
Notes:
1. See Default settings in this section to save and recall setups.
2. Revision Number displays the firmware revision level for the microcontroller and the display.
3. Serial Number displays the serial number of the power supply.
Manually set integration time (up to 60 sec).
Automatically set integration time.
Set the “NO PULSE” timeout period (1 to 63 sec).
Select trigger edge (rising, falling, or neither).
Sets long integration trigger level in Amps for the 5 A, 500 mA,
50 mA, or 5 mA current ranges:
Battery channel (#1) Charger channel (#2)
A (5.0) 0–5 A in 5 mA steps A (5.0) 0–5 A in 5 mA steps
mA (500) 0–500 mA in 0.5 mA steps
mA (50) 0-50 mA in 0.05 mA steps
mA (5) 0-5 mA in 0.005 mA steps
Getting around the MENU
• Press the MENU key to activate the menu.
• Press the ▲ or ▼ keys to scroll through the primary menu items.
• Press the or keys to toggle between Channel #1 and Channel #2.
NOTE If a channel number is not shown, the or keys presses will be ignored. Also
the or keys presses will be ignored if a submenu only exists on the battery
channel (not on the charger channel).
• The active channel may be changed in the main menu, and the top submenus for pulse
current and long integration. The active channel cannot be changed in all other submenus.
• Select the displayed primary menu item by pressing ENTER. With PULSE CURRENT or
LONG INTEGRATION selected, use the
pressing ENTER selects the displayed item).
NOTE Before pressing enter, make sure the desired channel is active. If ENTER is
pressed with the incorrect channel selected, press the MENU key (to cancel
changes), use the
ENTER to select the displayed primary menu item.
▲ or ▼ keys to display the secondary items (again,
or keys to scroll to the desired channel, and then press
• Display and change settings and selections (for a menu item) using the edit keys
( ▲, ▼, , or keys):
– For a setting, use or keys to place the cursor on the desired digit, then use the ▲ or
▼ keys to increase or decrease the value (unless noted otherwise).
– Rapid jump to minimum or maximum: To rapidly jump to the maximum value, increment
the most significant digit (the left further-most digit in the selection setting). If the most
1-14 Return to Section Topics 2308-900-01 Rev. A / July 2008
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