B+K precision 8500 Manuel utilisateur
USER MANUAL
8500 SERIES DC ELECTRONIC LOADS
Models 8500, 8502, 8510, 8512, 8514, 8518, 8520,
8522, 8524 & 8526
Safety
The following general safety precautions must e o served during all phases of operation of this instrument.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. B&K Precision assumes no lia ility for
the customer’s failure to comply with these requirements.
Verify that all safety precautions are taken. Note the instrument's external markings descri ed under "Safety
Sym ols".
This product is a Safety Class 1 instrument, which means it is provided with a protective earth terminal. To
minimize shock hazard, the instrument chassis and cover must e connected to an electrical ground. The
instrument must e connected to the AC line power through a grounded power ca le, with the ground wire
firmly connected to an electrical ground (safety ground) at the power outlet. Note: Any interruption of the
protective (grounding) conductor or disconnection of the protective earth terminal will cause a potential shock
hazard that could result in personal injury.
DO NOT OPERATE THE INSTRUMENT IN AN EXPLOSIVE ATMOSPHERE OR IN THE PRESENCE OF
FUMES OR FLAMMABLE GASES.
KEEP A AY FROM LIVE CIRCUITS.
Operating personnel must not remove instrument covers. Component replacement and internal adjustments
must e made only y qualified service personnel. Do not replace components with the power ca le
connected. Under certain conditions, dangerous voltages may exist even with the power ca le removed. To
avoid injuries always disconnect power, discharge circuits and capacitors, and remove external voltage
sources efore touching components.
DO NOT SERVICE OR ADJUST ALONE.
Do not try to perform internal service or adjustment unless another person capa le of rendering first aid and
resuscitation is present.
Safety Symbols
Note the instrument's external markings as follows:
Direct current
Alternating current
Both direct and alternating current
Protective earth (ground) terminal
Caution (refer to accompanying documents)
ARNING
The WARNING sign denotes a hazard. It calls attention to a procedure, practice,
or the like which, if not correctly performed or adhered to, could result in
personal injury. Do not proceed eyond a WARNING sign until the indicated
conditions are fully understood and met.
CAUTION
The CAUTION sign denotes a hazard. It calls attention to an operating
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 product. Do not proceed
eyond a CAUTION sign until the indicated conditions are fully understood and
met.
8500 DC Load Series Version: February 4, 2009 Page 2 of 76
Table of Contents
Safety......................................................................................................................................................2
Safety Sym ols...................................................................................................................................2
Notation...................................................................................................................................................5
Quick reference......................................................................................................................................6
Model num ers covered y this document..........................................................................................6
Options and accessories.....................................................................................................................6
Overview of instrument.......................................................................................................................6
Typical tasks.......................................................................................................................................7
Front panel..........................................................................................................................................7
Standard display.................................................................................................................................9
Front panel keys.................................................................................................................................9
Rear panel........................................................................................................................................10
Display annunciators.........................................................................................................................11
Menus...............................................................................................................................................11
Specifications........................................................................................................................................15
Environmental Conditions ................................................................................................................16
Internal Resistances.....................................................................................................................17
Operational power curve..............................................................................................................17
Low Voltage Characteristics.........................................................................................................18
Slew rate......................................................................................................................................19
Glossary................................................................................................................................................21
Installation.............................................................................................................................................23
Inspection.........................................................................................................................................23
Items you should have received...................................................................................................23
Instrument location............................................................................................................................23
Outline Drawings...............................................................................................................................23
Bench operation................................................................................................................................26
First turn-on checkout.......................................................................................................................27
Operational introduction....................................................................................................................28
Power-on state..................................................................................................................................29
Constant current mode.....................................................................................................................29
Constant voltage mode.....................................................................................................................30
Constant power mode.......................................................................................................................30
Constant resistance mode................................................................................................................31
Timed operation................................................................................................................................31
Changing display resolution..............................................................................................................32
Increasing current resolution........................................................................................................32
Increasing voltage resolution........................................................................................................32
Short.................................................................................................................................................32
Battery test........................................................................................................................................32
Transient operation...........................................................................................................................33
Continuous transient operation.....................................................................................................33
Pulse transient operation..............................................................................................................34
Toggled transient operation..........................................................................................................35
Toggle etween two test values...................................................................................................36
Lists (dynamic condition)...................................................................................................................36
Test files...........................................................................................................................................37
8500 DC Load Series Version: February 4, 2009 Page of 76
Triggering..........................................................................................................................................39
Voltage threshold operation..............................................................................................................40
Passwords........................................................................................................................................40
Protection features............................................................................................................................40
Over Voltage protection................................................................................................................41
Over Current protection................................................................................................................41
Over Power protection .................................................................................................................41
Reverse voltage protection...........................................................................................................41
Over Temperature protection.......................................................................................................42
Remote sensing................................................................................................................................42
Saving and Recalling settings...........................................................................................................43
Remote operation..................................................................................................................................44
Communication ca les......................................................................................................................44
RS232 to TTL serial converter ca le IT-131 (standard)................................................................44
USB to TTL serial converter ca le IT-132 (option)........................................................................44
RS-232 settings................................................................................................................................45
Overview of DC Load programming..................................................................................................45
Packet structure...........................................................................................................................45
Status packets..............................................................................................................................46
Chapter organization....................................................................................................................48
Summary of commands....................................................................................................................49
Command details..............................................................................................................................51
Serial num er and firmware version......................................................................................................71
In case of trou le...................................................................................................................................72
Instrument won't turn on....................................................................................................................72
Error messages during power-up......................................................................................................72
Keypad unlock procedure (Keypad was accidentally locked)............................................................72
Appendix: Service and warranty information.........................................................................................74
Index.....................................................................................................................................................75
8500 DC Load Series Version: February 4, 2009 Page 4 of 76
Notation
I-set Represents a key on the front panel. Note that some of these may e
accessed in com ination with the Shift key.
OFF Annunciator, value, or message shown on the vacuum fluorescent
display.
CONFIG Menu item
OFF Default menu item
8500 DC Load Series Version: February 4, 2009 Page 5 of 76
Quick reference
Model numbers covered by this document
The B&K Precision DC Loads covered y this manual are:
●8500
●8502
●8510
●8512
●8514
●8518
●8520
●8522
●8524
●8526
Unless otherwise noted, this document will refer to all of these instruments as the DC Load.
Instrument differences, where appropriate, will e noted.
Options and accessories
The items included with the instrument are:
1. Power cord
2. User manual
3. Installation CD with application software PV8500 and USB driver for optional TTL to USB
adapter
4. TTL to RS232 serial converter IT-131
5. Test report
Optional accessories are:
6. rack mount kit IT-E151
7. TTL to USB serial adapter IT-132
Overview of instrument
The DC Load is a two terminal device that can e connected to DC sources. Here, a DC source is a
voltage that is always positive on the DC Load's + terminal referenced to the - terminal.
DC Electronic Loads are used for design, manufacturing and evaluation of DC power supplies,
atteries, and power components. Other applications include fuel-cell and photovoltaic cell test. The
DC Load can operate under the following modes:
●Draw a constant voltage from a DC source.
●Draw a constant current from a DC source.
●Draw a constant power from a DC source.
●Present a constant resistance to the DC source (this ehavior simulates a perfect resistor
8500 DC Load Series Version: February 4, 2009 Page 6 of 76
whose resistance doesn't change as a function of current or voltage).
The DC Load can present dynamically changing loads to the DC source with millisecond switching
times. The DC Load can e remotely programmed via a serial interface (RS-232 or USB). Versatile
triggering options allow the dynamic load ehavior to e synchronized with other events.
A attery test mode is provided that will measure the ampere*hour (A*hr) characteristic of a attery.
Shorts can e simulated y either the front panel or custom programming. The DC source or other
components can e protected from excessive voltage, current, or power, which will cause the DC
Load to shut down if excessive levels or reverse polarity are detected.
Dynamic profiles and last instrument states can e stored in non-volatile memory.
The DC Load is a versatile instrument for static and dynamic testing of power supplies, atteries, DC
to DC converters, and attery chargers.
Typical tasks
To perform the following tasks, consult the indicated sections
Task Section(s)
Manual on/off CC, CV, CW, or CR test Constant current mode
Constant voltage mode
Constant power mode
Constant resistance mode
Timed on/off CC, CV, CW, or CR test Constant current mode
Constant voltage mode
Constant power mode
Constant resistance mode
Timed operation
Triggered CC, CV, CW, or CR test Constant current mode
Constant voltage mode
Constant power mode
Constant resistance mode
Triggering
Constant load with one transient Transient operation
Load with multiple transients Lists (dynamic condition)
Determine A*hr characteristic of attery Battery test
Run a sequence of tests Test files
Front panel
The following picture is the front panel for the 8510 DC Load. All models have the same front panel,
only the terminal section will vary ased on the model.
8500 DC Load Series Version: February 4, 2009 Page 7 of 76
6
12
3 4 5
Button Function(s)
1
16-character display shows voltage and current measurements.
2
Rotary kno . Turn to adjust a setting value. Press in to toggle etween setting the
currently-selected mode's value and reading the voltage and current, as shown in
the a ove picture.
3
Power switch to turn the instrument on or off.
4
Numeric keypad:
Numeric entry keys.
Secondary key functions.
5
Keypad:
Ena le/disa le input.
Set up the current, voltage, power, and resistance modes.
Scroll through menus and options.
6
Input terminals. Depending on the model, you will have different types and
num ers of input terminals.
Models 8500/8502 come with one plus and one minus terminal
Models 8510/8512 come with two positive and two negative terminals however
each terminal is a le to sink the maximum current supported y the instrument.
Thus, it is not necessary to dou le up on the wires when sinking a high current
unless you wish to.
Models 8514/8518 also come with two positive and two negative terminals however
it is required to double up on the wires when sinking a current exceeding 120A.
Models 852x come with a screw terminal lock to connect the wires
8500 DC Load Series Version: February 4, 2009 Page 8 of 76
Standard display
The standard display for the instrument is the voltage and current at the instrument's terminals. You
may press the △ or ▽ keys to see the instantaneous power and the mode's parameter setting.
Standard display
Front panel keys
1
4
2
8 9
6 05
7
3 ESC
I-set V-set
R-set
Input on/off
Shift
P-set ENTER
PO ER A B
Tran
Store Recall S-Tran Menu
Local Battery Short Trigger
V-set Choose constant voltage mode.
I-set Choose constant current mode.
P-set Choose constant power mode.
R-set Choose constant resistance mode.
Shift + A
Set the current mode's load value from the A value of the
corresponding transient operation. See the Transient
operation section. This key does not work when the
TRAN annunciator is on.
Shift + B
Set the current mode's load value from the B value of the
corresponding transient operation. See the Transient
operation section. This key does not work when the
TRAN annunciator is on.
Shift + Store Store the DC Load state in non-volatile memory. You may
store 25 different states.
Shift + Recall Recall the DC Load state from non-volatile memory. You
may recall 25 different states.
8500 DC Load Series Version: February 4, 2009 Page 9 of 76
Shift + Menu Enter the instrument's menu system.
Shift + Short Turn short circuit on or off.
Shift + Tran Start or stop transient condition.
Shift + Trigger Causes an immediate trigger.
Shift + Battery Turn on or off attery testing function (measures attery
capacity in ampere*hours).
Shift + S-Tran Set transient condition parameters.
On/Off Turns DC Load ON or OFF (OFF is high impedance
state).
Shift The shift key is used to select the alternate operation of a
key, indicated y the word under the key.
△Scroll up key.
▽Scroll down key.
0 to 9Enter the digits 0 to 9.
•Decimal point.
Esc The escape key. It can e used to exit key oard entry or
move up a level in the menu.
Enter Enter the selected value or setting.
Rear panel
Your instrument's rear panel may look different from the following figure, ut the same functionality
will e present.
4
1
23
1
3 pin IEC320 AC input connector.
2
4 pin trigger and remote sensing connector.
3
9-Pin serial port interface connector. NOTE: This port's terminals utilize 5 volt
TTL logic signals. Do NOT connect an RS-232 ca le with standard RS-232
voltages on the ca les connectors. Doing so may damage the instrument and is
8500 DC Load Series Version: February 4, 2009 Page 10 of 76
Autres manuels pour 8500
2
Ce manuel convient aux modèles suivants
9
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