Instruction Manual
1
Model 8500 300W DC Electronic Load
Warranty Information
Certification
We certify that this product met its published specifications at time of shipment from the factory.
Safety Summary
The following general safety precautions must be observed 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 .We assumes no
liability for the customer’s failure to comply with these requirements.
Environmental Conditions
This instrument is intended for indoor use. Pollution degree 2 environments . It is designed to operate at
a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the specifications
tables for the ac mains voltage requirements and ambient operating temperature range.
Before Applying Power
Verify that all safety precautions are taken. Note the instrument's external markings described under
"Safety Symbols".
2
Ground The Instrument
This product is a Safety Class 1 instrument (provided with a protective earth terminal). To
minimize shock hazard, the instrument chassis and cover must be connected to an electrical
ground. The instrument must be connected to the ac power mains through a grounded power
cable, 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 IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of fumes or flammable gases.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers except as instructed in this Guide for
installing or removing electronic load modules. Component replacement and internal
adjustments must be made only by qualified service personnel. Do not replace components
with power cable connected. Under certain conditions dangerous voltages may exist even with
the power cable removed. To avoid injuries always disconnect power, discharge circuits, and
remove external voltage sources before touching components.
DO NOT SERVICE OR ADJUST ALONE
Do not try to do some internal service or adjustment unless another person capable of
rendering first aid resuscitation is present.
Safety Symbols
Direct current
Alternating current
Both direct and alternating current
Protective earth (ground) terminal
Caution (refer to accompanying documents)
3
___________________________________________________________________
WARNING
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 beyond 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 beyond a CAUTION sign until
the indicated conditions are fully understood and met.
___________________________________________________________________
Quick Reference
The Front Panel
1 2
345 6
1
16-character display shows voltage and current measurements.
2
Rotary knob
3
Keypad:
Enable/disable input.
Setup the current, resistance and voltage modes.
Set and reset protection functions.
4
Scroll through front panel.
4
Entry keys:( numeric keys)
Enter values.
Increasing or decreasing the setup values.
Menu commands.
5
Power switch ON/OFF
6
Input terminals.
The Rear Panel
3 4
1 2
1
4 Pin Trigger and Remote sensing connectors.
2
9-Pin COM port interface connector.
3
Power switch (110V / 220V)
4
3 Pin IEC320 ac input connector. (Power code requires ground
conductor).
5
Front Panel Annunciators
Indicates that the shift key has been
OFF
CC
CV
CW
CR
Tran
List
Unreg
power off
Constant current (CC) mode.
Constant voltage (CV) mode.
Constant power (CW) mode.
Resistance (CR) mode.
The input channel is enabled for
transient operation.
List mode is initiated or running.
The input is unregulated.
Trigger
Sense
Error
Link
Rmt
Shift
Lock
Indicates that the electronic load is
waiting an initiate and trigger to
occur.
Indicates that the electronic load is
in Remote sensing state
A errors have occurred
In the communication state
Indicates that the electronic load is
in remote state (RS-232). In the
remote state, only the active key is
the Local key.
pressed.
keyboard is locked by password
Immediate Action Keys
V-set
I-set
P-set
R-set
Shift
A
Choosing CV mode and setting the input of regulation voltage mode
Choosing CI mode and setting the input of regulation current mode
Choosing CP mode and setting the input of regulation power mode
Choosing CR mode and setting the input of regulation resistor mode
+
Switch to A setting value
6
Shift
B
+
Switch to B setting value
Shift
store
Shift
Recall
Shift
Menu
Shift
Short
Shift
Tran
Shift
+
+
+
+
+
+
Press to store an existing electronic load state in non-volatile Memory.
Press to recall an existing electronic load state in non-volatile Memory.
Enter operation Menu.
Turn on or turn off short circuit Test.
Start /Stop transition operation
Causes a trigger to occur. Change the trigger source is IMMIDIATE
Trigger
Shift
Battery
Shift
S-Tran
Input on/off
Battery discharge electronic operation
+
Set the transition operation parameter
+
Enable or disable load input.
7
Front Panel Menus
Selected function menu. Bring up the next command in the list. Function
1
2
3 ESC
I-set V-set
POWER
A B Tran
4
6 05
P-set ENTER
Store Recall S-Tran Menu
7
8 9
Shift
Input on/off
Local Battery Short Trigger
Key Pad
0
~9 0 through 9 are used for entering numeric values.
Decimal point.
ESC
The escape key. It may used to exit any working state.
I-set
V-set
P-set
R-set
Shift
Input on/off
Choosing CC mode and setup the input current of regulation current mode.
Choosing CV mode and setup the input voltage of regulation voltage mode.
Choosing CW mode and setup the input watt of regulation power mode.
Choosing CR mode and setup the input resistor of regulation resistance
mode.
Shift keys.
Power ON/OFF
R-set
? Scrolling keys let you move through the commands in the presently
menus are circular; you can return to the starting position by continuous
pressing the key.
? Go back to the previous command in the list .Function menus
Are circular; you can return to the starting position by continuous pressing
the key.
ENTER
Confirmation key.
8
Menu Operation
keep the state of last
from
from
Press Menu to indicate operation mode .View the menu in VFD and using ? and
? to scroll through the completely menu list as following .IF press
you could get the selected menu function. Press
ESC
back to the previous menu
selection page.
MENU
CONFIG
INITIAL CONFIG
POWER-ON RECALL
INPUT RECALL
KEY SOUND SET
KNOB LOCK SET
REMOTE SENSE
TRIGGER SOURCE
ON
OFF<DEFAULT>
ON
OFF<DEFAULT>
ON<DEFAULT>
OFF
ON
OFF<DEFAULT>
Setup voltage measurement Mode.
ON
OFF<DEFAULT>
Choosing the trigger signals source.
IMMEDIATE<DEF>
Return to the factory default setup value.
Setting Power-on state of Load.
When users turn on the electronic load; the
electronic load setup value will
time when users turn off the electronic load.
Disable this function.
Setup of the electronic load input state in Power on.
When users turn on the electronic load; the
electronic load input will keep the state of last time
when users turn off the electronic load.
When users turn on the electronic load, the
electronic load input will keep the state off.
Keypad sound setting.
Enable key sound.
Disable key sound.
Setup Rotary knob lock state.
Lock Rotary knob.
Unlock Rotary knob.
The electronic load will measure input voltage
the remote sense connector.
The electronic load will measure input voltage
the front panel connector.
Trigger signals from
Shift
+
ENTER
Trigger
key,
key
BAUDRATE SET
EXTERNAL
BUS
9600<DEFAULT>
Trigger signals from the TRIG connector in the
rear panel.
Communication command trigger mode.
Setting baud rate.
9
ers can choose 4 kind of memory space to save the list
When users choose the timer state ON, and then
the electronic
COMM. PARITY SET
ADDRESS SET
9600
19200
38400
Command parity setting.
NONE<DEFAULT>
EVEN
ODD
Setting communication Flow mode
KEY LOCK SET
SYSTTEM SET
MAX CURRENT SET
MAX POWER SET
MAX VOLTAGE SET
EXIT
LIST SET
MODE SET
CALL LIST FILE
EDIT LIST FILE
LIST STORE MODE
EXIT
FIXED MODE
LIST MODE
Setup the Maximum current.
Setup the Maximum Power.
Setup the Maximum Voltage.
Setting operation mode.
Fixed mode.
Choosing List mode.
Recall list operation file.
Edit list operation file.
Us
file.
8 X 120 STEPS
4 X 250 STEPS
2 X 500 STEPS
1 X 1000 STEPS
EXIT
LOAD ON TIMER
TIMER STATE
Setting LOAD ON timer state
ON
OFF<DEFAULT>
TIMER SET
Setting time of LOAD ON timer,
Setting keypad password.
Press
ENTER
directly to disable the key lock
function.
Total 8 files and each file have120 list steps.
Total 4 files and each file have250 list steps.
Total 2 files and each file have500 list steps.
Total 1 file and each file have1000 list steps.
turn on the electronic load input, the LOAD ON
TIMER will start working, and when the LOAD
ON TIMER is reach the setup time,
load input will turn off automatically,.
EXIT
EXIT
10
General Information
Document Orientation
This manual describes the operation of the Model 8500 DC Electronic Loads. Unless
otherwise noted, all units will be referred to by the description "electronic load"
throughout this User's manual. The following documents and software are shipped
with your electronic load.
This User's Guide (this document), contains installation, checkout, front panel
information and detailed programming information.
The Getting Started Map will help you find the information you need to complete the
specific task that you want to accomplish. Refer to the table of contents or index of
each guide for a complete list of the information contained within.
Getting Started Map
Task Where to find information
Checking out the unit
Verifying proper operation
Using the front panel
Calibrating the unit
Using the front panel
Front panel keys
Front panel examples
Using the programming interface
RS-232 interface
Remote operation mode
Protocol information
Controller Program and Software driver:
Power View PV8500 software
Calibration PC8500 software
Active driver PD-8500 OCX software
User’s Guide
User’s Guide
User’s Guide
User’s Guide
CD-ROM
Options and Accessories
Options
IT-E151 Rack mounts kit: for install one or two 8500 series load on the 19 inch rack.
ITE-131 isolated communication cable: This cable converts the Electronic Load’s
serial port (TTL 5V level) to PC RS232 interface.
11
Accessories
Power cord
User’s manual
Software CD-Rom
Description
The 8500 serial Electronic Load is used for design, manufacturing, and evaluation of
DC power supplies, batteries, and power components and so on. The Electronic load
contains a processor, serial port connector, front-panel keypad and VFD, and other
circuits common to the other entire load module.
8500 serial Electronic Load could work in constant current (CC) mode, constant
voltage (CV) mode, or constant resistance (CR) mode and constant power (CW)
Mode.
Features And Capabilities
• High accuracy and high resolution
• Capable to work with constant current (CC), constant voltage (CV), constant
resistance (CR) mode and constant power (CW) operation.
• Serial port interface-DB9-RS232 port.
• Triggered input and measurement functions.
• Within the controlled keypad in the front panel
• Built-in pulse generator for continuous, pulsed, and toggled transient mode
operation.
• Over voltage, over current, overpower, and over temperature protection.
• Electronic load calibrate by Software.
• Fan speed control by temperature.
• VFD display
• Short circuit test
• Battery testing function.
Front Panel Controls
The front panel has keyboard controls for setting the input voltage, current and
resistance. The panel display provides digital readouts of a number of functions
including the inputs. Annunciators display the operating status of the electronic load.
12
Remote Programming
The electronic load may be remotely programmed from the computer via the IT-E131
isolated communication cable.
Operating Modes
The four modes of operation are:
1: Constant current (CC).
2: Constant voltage (CV).
3: Constant resistance (CR).
4: Constant power (CW)
Constant Current( CC) Mode
In this mode, the electronic load will sink a current in accordance with the
programmed value regardless of the input voltage. CC mode can be set with front
panel keys. The CC mode parameters are discussed in the following paragraphs.
I
CURRENT
LOAD
SETTING
CURRENT
LOAD INPUT
V
VOLTAGE
CONSTANTCURRENT MODE
Constant Resistance (CR) Mode
In this mode, the module will sink a current linearly proportional to the input voltage in
accordance with the programmed resistance. The CR mode can be set at the front
panel. The CR mode parameters are described in the following paragraph
13
I
LOAD
CURRENT
SLOPE
RESISTANCE
SETTING
LOAD INPUT
V
VOLTAGE
CONSTANT RESISTANCE MODE
Constant Voltage (CV) Mode
In this mode, the electronic load will attempt to sink enough current to control the
source voltage to the programmed value. The module acts as a shunt voltage
regulator when operating in the CV mode. The CV mode can be set at the front panel.
The CV mode parameters are described in the following paragraphs.
V
VOLT
LOAD INPUT
SETTING
VOLTAGE
LOAD CURRENT
CONSTANT VOLTAGE MODE
I
Constant Power (CW) Mode
In this mode, the electronic loads will consumption power accordance with the
programmed value regardless of the input voltage. The CW mode can be set with
front panel keys. The CW mode parameters are discussed in the following
paragraphs.
14
V
POWER
LOAD INPUT
VOLTAGE
V2
V3
I2 I3
SETTING
I
LOAD
CURRENT
CONSTANT POWER MODE
Transient Operation
Transient operation enables the electronic load to periodically switch between two
load levels, as might be required for testing power supplies. A power supply's
regulation and transient characteristics can be evaluated by monitoring the supply's
output voltage under varying combinations of load levels, frequency, and duty cycle.
Transient operation can be turned on and off at the front panel or PC via the IT-E131
isolated communication cable. Before you turn on transient operation, you should set
the desired mode of operation as well as all of the parameters associated with
transient operation. Transient operation may be used in the CC, CR, or CV or CW
modes and can be setup in continuous, pulsed, or toggled operation mode.
Continuous
Generates a repetitive pulse stream the toggles between two load levels and change
the state between value A and value B.
10A
5A
2.0ms 3.0ms
Continuous Transient Operation
15
Pulse
Switch to value B as receiving one trigger signal , taking the pulse time(TWD) of value
B , Load will return to Value A .
10A
5A
TWD
10ms
TRIG TRIG
TWD
10ms
Pulsed Transient Operation
Trigger Mode
Switching the state between value A and value B once receiving a triggering signal
10A
5A
TRG
TRG
Toggled Transient Operation
List Operation
List mode lets you generate complex sequences of input changes with rapid, precise
timing, which may be synchronized with internal or external signals. List operation can
be changed by edit every step value and time in list operation. The parameter of list
operation include the group file name, input step setting (the max steps is 1000
steps),time of one step( 1mS~1h) and setting value of one step. In CC mode, dwell
time range is 1mS to 6S, which also have an associated value. Note that lists data can
only be saved in total 1000 steps memory of 4 situations.
GROUP Total = 1000 steps
16
1 1000 steps
2
4 250 steps 250 steps 250 steps 250 steps
8 120
steps
When receiving one trigger signal, it will start the list operation until receiving another trigger
signal or finish the List operation.
500 steps
120
steps
120
steps
120
steps
120
steps
500 steps
120
steps
120
steps
120
steps
Trigger
10 2 3 4 5
List count=1 List count=2
List sequence
Triggered Operation
The electronic load has various triggering modes to allow synchronization with other
test equipment or events. Such as:
Keypad triggering mode: Press
Shift
TTL triggering mode: Send a high pulse with a constant time more than 5m Sec to
the trigger terminals in rear panel to trigger the electronic load.
Command triggering mode: Send triggering command to the electronic load via the
serial port.
+
Trigger
to trigger the electronic load.
17
Input Control
Short On/Off
Load can simulate a short circuit at its input by turning the load on with full-scale
current. The short circuit can be toggled on/off at the front panel using the
Shift
value , When short operation is on OFF state , Load back to the original setting state.
The actual value of the electronic short is dependent on the mode and current range
that are active when the short is turned on.
In CC, CW and CR mode, the max short-circuit current value is 1.2 times of the
current range. In CV mode, short-circuit operation is same as the operation of setting
CV to 0V.
NOTE
Turning the SShhoorrtt TTeesstt on in CV mode may cause the load to draw so much
current that the software current limit operates, which may turn the input off.
Turning the short circuit on does not affect the programmed settings, and the
load input will return to the previously programmed values when the short is
turned off.
Short
+
.Short operation is not influence the operation setting current
Input On/Off
Electronic load's input can be toggled on/off at the front panel. Turning the input off
(zero current) does not affect the programmed settings. The input will return to the
previously programmed values when the input is turned on again.
NOTE
The Input On/Off command supersedes the mode commands and Short Test
On/Off command.
Operation Range
Work in the range of Rated Current, Rated voltage and Rated Power, The
figure is as following:
18
Rated voltage
INPUT VOLTAGE V
Rated power
Input current I Rated current
Operation mode change state
Rated voltage
INPUT VOLTAGE V
C
Input current I Rated current
Software Power Limit
A
Protection Features
Software Current Limit
Electronic load includes the following protection features:
Over Voltage
If input voltage exceeds the voltage limit, Load will turn OFF the input, Buzzer is
mooing. VFD display as following:
OVER VOLTAGE
19
Over Current
When work in the CR or CC and CP mode, input current is ascending continuously,
the load current will be limited by a current limit circuit, Load will work in the over
current protection state , VFD display the information as CC.
When work in CV mode and transition mode and List mode, Input current exceeds the
current limit, Buzzer is mooing, VFD display the flashing current value.
Over Power
If the input power exceeds the power limit in the normal operation mode, Load will
work in the over power protection state. VFD displays the information as CW.
When work in transition mode and list mode, If the input power exceeds the power
limit. Buzzer is mooing, VFD display the flashing current value and voltage value.
Reverse Voltage
This feature protects the load module in case the input DC voltage lines are
connected with wrong polarity, if a reverse voltage condition is detected, Buzzer is
mooing. VFD display as following:
REVERSE VOLTAGE
Over Temperature
If internal power components ‘s temperature exceeds safe limits (80? ), Over
temperature protection is on work . Load will turn off the input and Buzzer is mooing,
VFD display as following:
OVER HEAT
Remote Sense Function
When work in CV, CR and CP mode, if load consumes biggish current, it will cause
one depressed voltage in the connection line between tested machine and terminals
of Load. In order to assure testing precision, Load provides one remote testing
terminals in the rear panel, Users could test the output terminals voltage of tested
machine through it. Users should set the Load in REMOTE mode before using the
function.
20
Saving And Recalling Settings
The electronic load has internal registers in which settings (mode, current, voltage,
resistance, transient level, etc.).Users could use
Shift
Recall
+
to save and recall the relative data as following:
Shift
Store
+
and
CC value /CW value /CR value /CV value
Transition current A value /Transition current B value /Transition voltage A value
/Transition voltage B value / Transition power A value /Transition power B value
/Transition Resistance A value /Transition Resistance B value
Current A pulse width time/ Current B pulse width time/Voltage A pulse width time/
Voltage B pulse width time /Power A pulse width time/Power B pulse width time
/Resistance A pulse width time /Resistance B width time
Transition current testing mode/Transition voltage testing mode/Transition power
testing mode /Transition resistance testing mode
Max current value / Max voltage value / Max power value
Battery Testing
Load provides the function of discharging electronic of testing battery. Setting
discharging current by press
I-set
, then press
Shift
voltage, Battery testing operation is run. When Battery Voltage setting value is lower
than the limited voltage; Load will turn off the input. VFD will display the capacity of
testing battery, Press
Shift
+
Battery
and return the normal mode.
+
Battery
to set the mix
21
V
Battery Voltage
Min voltage
t
I
Load Sink Current
t
External Control Signals
Electronic Load has a 4-pin connector mounted on its rear panel. These signals are
described in the following paragraphs.
Remote Sensing: SENSE (+) and SENSE (–) are the remote sensing inputs . By
eliminating the effect of the inevitable voltage drop in the load leads, remote sensing
provides greater accuracy by allowing the load to regulate directly at the source's
output terminals.
TRIG: A TTL-compatible input that responds to external edge trigger signal. A
trigger applied to this input can be used to change settings (voltage, current,
resistance, etc.), toggle between settings in transient-toggle mode, or generate a
pulse in transient-pulse mode.
22
Installation
Inspection
Damage
When you receive your electronic load, inspect it for any obvious damage that may
have occurred during shipment. If there is damage, notify the shipping carrier and
nearest Agent office and Support Office immediately.
Items Supplied
The following user replaceable items are included with your electronic load.
Item Description
Power Cord Users will get one of the power cord.
User's Guide
Software CD-Rom Programming information
Calibration Report The Instrument calibration report.
Contains installation, checkout, and
front panel information and
Cleaning
Use a dry cloth or one slightly dampened with water to clean the external case parts.
Do not attempt to clean internally.
___________________________________________________________________
WARNING
To prevent electric shock, unplug unit before cleaning.
___________________________________________________________________
Location
The outline diagram in following figure gives the dimensions of your electronic load.
The electronic load must be installed in a location that allows sufficient space at the
sides and back of the unit for adequate air circulation.
23
Installation
Dimension :101mmW x 215mm H x 366mm D
Terminal length: 29.4mm Feet height:17.5mm
Outline Diagram Unit (mm)
24
Carrying Handle
Bench Operation
A fan cools the electronic load by drawing air through the button and sides and
exhausting it out the back.
Minimum clearances for bench operation are 25 mm along the sides.
___________________________________________________________________
CAUTION
Do not block the fan exhaust at the rear of the Load.
___________________________________________________________________
Rack Mounting
The 8500 serial electronic load can be mounted in a standard 19-inch rack. Rack
mount kits are available as Option IT-E151. The electronic load can be mounted in a
standard 19-inch rack panel or enclosures using an Option IT-E151 rack mount kit. A
rack mount kit for joining two half-rack units is also available by using Option
IT-E151.
25
Rack Installation
Elevation for Installation one electronic load in a standard 19-inch rack
Side elevation for Installation one electronic load in a standard 19-inch rack
Elevation for Installation two electronic loads in a standard 19-inch rack
26
NOTE
Remove the carrying handle and the two plastic ears before rack-mounting the instrument. To
remove the handle, grasp the handle by sides and pull outwards and rotate it to a special
position to let the arrow on the handle oppose the another arrow on the plastic ears, then pull
the handle outward. After removing the handle, you can use a screwdriver to remove the two
plastic ears.
27
Trigger And Remote Sensing Connections
A 4-pin connector and a quick-disconnect mating plug are provided on rear panel for
accessing input signals and remote sensing, all leads connected to the connector
should be twisted and shielded to maintain the instrument's specified performance.
Remote Sensing: sense ( + ) and sense ( - ) Used to connect the remote sensing
leads to the power source.
TRIG IN: TRIG (IN) A TTL-compatible input that responds to external edge trigger
signal. A trigger applied to this input can be used to change settings (voltage, current,
resistance, etc.), toggle between settings in transient-toggle mode, or generate a
pulse in transient-pulse mode.
TRIG GND: TRIG ( ) Provides the common connection for the trigger signals.
Computer Connections
The electronic load can be controlled through a PC serial port.
RS-232 Interface
The electronic loads have an serial port programming interface; all applicable
commands are available through serial port programming. It available to connect the
electronic load to any computer or terminal with the IT-E131 isolated communication
cable.
IT-E131 communication
cable
PC Load
COMPUTER
IT
IT-E131 ISOLATED
COMMUNICATION CABLE
859666668889942311
TTL(5V)RS232 ISOLATION
RX
TX
INSTRUMENT
28
CAUTION
Users must use IT-E131 to realize the remote operation between PC and 8500
series electronic load.
Turn-On Checkout
Introduction
Successful tests in this chapter provide a high degree of confidence that the electronic
load is operating properly.
Checkout Procedure
The test in this section checks for proper operation of the electronic load. If you have
not already done so, connect the power cord to the unit and plug it in.
Procedure Display Explanation
1. Turn the unit on.
The electronic Load
undergoes a self-test
when you First turn it on.
2. Wait for 1s after turn
on electronic load.
3. Wait for another 2S.
EPROM ERROR
ERROR CAL.DATA
During self test, all
segments are briefly
lit
EEPROM damage or
Lost data of last
power off
Run well if no such
display, system will
go to the step 3
directly.
EEPROM Lost
calibration data
Run well if no such
display, system will
go to the step 4
directly.
29
4.
Press Shift button and
??keys .
LOAD MODEL:IT85XX
SN: XXX-XXX-XXX
VER x.xx
Display the
information of the
product Type, series
number version of
software.
5. Press
ESC
button
0.000V 0.000A
Display the actual
input voltage and
current value.
6.Press ??
0.000W I: 0.000A
Display the actual
power value and
setting value.
In Case Of Trouble
Electronic load failure to run during power-on operation. The test of following in
this section help you to solve the possible problem When you turn on the
power of electronic load .
1) Make sure if you have connected the power cord to the unit and plug it in.
Power switch have been pressed.
2) Check the power voltage setting.
Work voltage of load have two type 110V or 220V , Please make sure it is right
voltage accordance to the voltage in your area. You could change the voltage setting
through dial the switch in the rear panel.
3) Check the fuse of load.
If fuse is blowout, please change it as following specification.
Model Fuse specification
(110VAC)
8500 T0.5A 250V T0.3A 250V
Fuse specification
(220VAC)
30
4) Location of Fuse
FUSE
Front Panel Operation
Introduction:
Here is what you will find in this chapter:
A complete description of the front panel controls
Front panel programming examples.
31
Display
Indicates that the shift key has been
16-character fluorescent display for showing measurements and programmed values.
Annunciators
Annunciators light to indicate operating modes and status conditions:
OFF
CC
CV
power off
The selected input channel is in
the constant current (CC) mode.
The selected input channel is in
the constant voltage (CV) mode.
Trigger
Sense
Error
Indicates that the electronic load is
waiting an initiate and trigger to
occur.
Indicates that the electronic load is
in sense state
A errors have occurred
CW
CR
Tran
List
The selected input channel is in
the constant power (CW) mode.
The selected input channel is in
the resistance (CR) mode.
The selected input channel is
enabled for transient operation.
A list is initiated or running.
Link
Rmt
Shift
Lock
Function keys
Main Function:
Set up a constant current output.
Set up a constant power output.
Set up a constant resistance output
Select CC, CR and CV and CW modes.
Select Current, Resistance and Voltage levels.
Set Trigger and Transient levels.
Set up front panel measurements.
Recall the stored data
Battery testing
Short-circuit testing
In the communication state
Indicates that the electronic load is
in remote state (RS-232). In the
remote state, only the active key is
the Local key.
pressed.
keyboard is the mode for password
32
Entry Keys
Entry keys let you:
Enter programming values.
Increasing or decreasing setup values.
Press ? or ? select the front panel menu parameters.
Power
The Power switch turns the electronic load power on or off.
Example
I-set (set up a constant current from 0 to Max
current )
Set up a constant DC current input is the first main function of programmable DC
electronic load,
8500 serial electronic load provides two methods to set up the constant DC current
output by using the number keyboard and the rotary button. Please see the following
operation procedure.
Procedure Operation details VFD display
STEP 1
Press
STEP 2 Enter the password or jump the step 4
if your password for reentering
STEP 3 Enter the original value which
displayed in the LCD or enter a new
value by using number keys or Rotary
knob to adjust the voltage value
STEP 4
Press
I-set
ENTER
to confirm
CURRENT=0.000A
PASSWORD:
CURRENT=*.***A
0.000V *.***A
Setup the output current at 4.33A.
Method 1: To set up by using number keyboard
Step1. Press
I-set
button.
33
Step2. Press numeric button to enter the current value 4.33.
Step3. Press
ENTER
button to confirm the current value.
Method 2: To set up
I-set
by using Rotary SW
(1) If the key board is unlocked by password, directly adjust the Rotary SW button,
and voltage will be continually changed from the previews value according the rotation.
At the beginning, the cursor will be shown on the last number of the value which is
indicated on the VFD, you can move the cursor to the first number, second number
etc by using number buttons, and then adjust the Rotary SW to change each number,
and let it stay at *.** A. Please see the following description. Then press I-set to
confirm the value.
0.00A 0.00V
0.0W 4.33A
Procedure:
Step1. Press
I-set
button,
Step2. Adjust the Rotary knob to change the value, the operation is as the same as
item (1)
Step5. Press
ENTER
button to confirm the current value.
P-set (set up a constant power from 0 to Max
power)
8500 series electronic load can be set up for a constant power.
Constant power setup procedure is as following:
Procedure Operation details VFD display
Step 1
Step 2
Press
P-set
Enter a new value by using
numeric keys or Rotary
knob to adjust the voltage
value
POWER =0.000W
POWER=*.***W
34
Step 3
Press
ENTER
to confirm.
0.000W P:*.000W
R-set (set up a constant resistance from 0.1O to
4000O )
8500 series electronic load can be setup for a constant resistance.
Constant resistance setup procedure is as following:
Procedure Operation details VFD display
Step 1
Step 2
Step 3
Press
enter a new value by using
numeric keys or Rotary
knob to adjust the
resistance value
Press
R-set
ENTER
to confirm.
RESISTANCE =0000R
RESISTANCE=*****R
0.000W R:0000R
V-set (set up a constant voltage from 1.5V to
Max voltage)
8500 electronic load can be setup for a constant voltage.
Constant voltage setup procedure is as following:
Procedure Operation details VFD display
Step 1
Step 2
Step 3
Press
enter a new value by using
numeric keys or Rotary
knob to adjust the
resistance value
Press
V-set
ENTER
to confirm.
VOLTAGE=1.500V
VOLTAGE=*.***V
0.000W V:3.000V
35
Shift + Store
Procedure Operation details VFD display
Step 1
Step 2
Press
Press
Shift
ENTER
Store
and
to confirm.
STORE 1
Store the relative data
Shift + Recall
Procedure Operation details VFD display
Step 1
Step 2
Press
Press
Shift
ENTER
Recall
and
to confirm
RECALL 1
Recall the saving data
Out On/Off input setting
Input on/off
Use
press
Input on/off
to change the state of electronic load. Switch on to off state by
.
Menu description
procedure The operation methods
Step 1
Step 2
The VFD
display the
menu
functions
one by one,
user can use
Press
?
Shift
Menu
+
Enter INITIAL CONFIG
?
?
?
?
?
button
36
VFD display
CONFIG
POWER-ON LOAD
POWER-ON RECALL
KEY SOUND SET
KNOB LOCK SET
REMOTE SENCE
the ? and
? button to
change the
selecting
function,
press
ENTER
button
to execute
the selection
function or
step into the
next
sub-menu
?
?
?
?
?
?
?
?
TRIGGER SOURUSE
BAUDRATE SET
COMM.PARITY SET
ADDRESS SET
KEY LOCK SET
EXIT
SYSTEM SET
ENTER
?
?
?
MAX CURRENT SET
MAX POWER SET
MAX VOLTAGE SET
EXIT
LIST SET
Enter MODE SET
?
?
?
CALL LIST FILE
EDIT LIST FILE
LIST STORE MODE
?
?
Enter TIMER STATE
?
?
?
EXIT
LOAD ON TIMER
TIMER SET
EXIT
EXIT
Transition Testing Operation
Users could switch between the two different current and voltage in the transition
mode; it could test the transition specialty of power supply. Users could use front
panel or communication interface( TRAN ON AND TRAN OFF) to make it work or not,
Please setting parameters before transition operation. Include Transition setting value,
Constant pulse width setting and Transition Pulse width setting and Transition testing
mode. The mix pulse width is 500uS.The Max pulse width is 6S. Transition Operation
only could work in CC and CV mode.
Users can choose one of the three operation modes: Continuous, Pulse and Toggling
mode.
Transition Parameter Setting
Users could press
Shift
S-Tran
+
Shift
LEVEL A = *****
+
S-Tran
to set the transition parameter.
Setup value A
37
ENTER
WIDTH A = ******
Setup time width of value A
ENTER
ENTER
ENTER
LEVEL B=*****
WIDTH B= *****
CONTINUOUS
PULSE
Setup value B
Setup time width of value B
Choose one of the three
transition modes
TOGGLED
ENTER
Finish transition setting
Continuous Transient Operation
In this mode, electronic load will generates a repetitive pulse stream that
toggles between two load levels. ; Load could switch the state between two
setting value (value A and value B).
In this following example, assume that the CC mode is active; the applicable transient
operation parameters have been set as follows.
For example:
Continuous mode, current level A =5A, width = 2mS. Current level B =10A, width =
3ms. Testing machine output voltage is 12V.
10A
5A
2.0ms 3.0ms
Continuous Transient Operation
Action
1. On the Function keypad, press
2. Press
Shift
and
S-Tran
WIDTH B=2mS, transition mode is CONTINOUS. .
3. Press
4. Press
Shift
Shift
and
and
Input on/off
button to turn off the load input.
, setting LEVEL A=5A, WIDTH A=3mS, LEVER B=10A,
Tran
to activate the transient mode.
Tran
again to stop the transient operation.
38
Pulse Transient Operation
In this mode, generates a transient pulse of programmable width when pulsed
transient operation is in effect.
For example: When load receiving one trigger signal, it will switch to 10A current value, and
taking 10mS to return the current value of 5A.
10A
5A
TWD
10ms
TRIG TRIG
Pulsed Transient Operation
Action
1. On the Function keypad, press
2. Press
Shift
and
S-Tran
Transition mode is PULSE .
3. Press
4. Press
more pulse.
5. Press
Shift
Shift
Shift
and
and
and
Tran
Trigger
Tran
TWD
10ms
Input on/off
button to turn off the load input.
, set LEVER A=5A, LEVER B=10A, WIDTH B=10mS,
to activate the transient mode.
and
Trigger
, get
to start another pulse. Press
again to stop the transient operation.
Shift
Toggled Transient Operation
In this mode, after transition operation start, Load could change the input
between the main level and the transient level when toggled transient
operation is in effect.
For example:
When Load receives one trigger signal, Load current will switch between 5A and
10A.
39
10A
5A
TRG
Toggled Transient Operation
TRG
Action
1. Press
Shift
and
mode is PULSE .
2. Press
3. Press
4. Press
5. Press
Shift
Shift
Shift
Shift
and
and
and
and
S-Tran
Tran
Trigger
Trigger
Tran
, Setting LEVER A=5A, LEVER B=10A, Transition
to activate the transient mode.
switch to the current value of 10A.
, switch between 5A and 10A.
again to stop the transient operation.
List Operation
Users can use the front panel keypad or Power View 8500(PV-8500) software to
programming the list sequence. Please refer to the software user’s guide.
The following example will help you how to do the list operation in front panel.
Trigger
10 2 3 4 5
List count=1 List count=2
List sequence
Action
1) Press the button of
Input on/off
, execute the input of Load I in OFF state.
40
2) Press
Shift
and
Menu
, move cursor to the option of menu of CONFIG ,
Press
SOURCE . Press
ENTER
into the next step menu ,move cursor to TRIGGER
ENTER
and move cursor to IMMEDIATE <DEF>, setting
trigger source mode is panel IMMEDIATE mode.
3) Press
4) Press
5) Press
6) Press
ENTER
to confirm.
ESC
to the previous menu , move cursor to LIST SET .
ENTER
into the next step menu .move cursor to EDIT LIST FILE.
ENTER
into the next step menu, move cursor to CURRENT LIST,
select CURRENT MODE.
7) Press
8) Press
9) Press
ENTER
, move cursor to REPEAT . Setup LIST is in cycle mode.
ENTER
to confirm, setup the list steps = 5.
ENTER
to confirm, setup step 1 current =3A.
10) Press
ENTER
to confirm, setup step 1 width=6mS.
11) Repeat 7) and 8) operation , set current and width of one step 0A, 5mS;2A,
4mS;6A,2mS;0A,5mS.
12) Press
13) Move cursor to Mode Set , press
ENTER
to confirm, Menu STORE LIST FILE 1. save file in group1.
ENTER
to enter into the next step menu to
set mode is <LIST MODE >
14) Press
15) Press
16) Press
17) Stop the list operation mode. Move cursor to LIST SET , Press
move cursor to Mode Set in option menu, press
ENTER
to confirm
ESC
, Press
Shift
and
Input on/off
Trigger
, Make Load in ON state.
, make list operation run or stop.
ENTER
, Enter into next
ENTER
,
step menu . Select mode is <FIXED MODE> ?
18) Press
ENTER
to confirm.
41
Specifications
Parameter
Input rating
( 0 ~ 40 ? )
Load
Regulation
Regulation
Regulation
CR Mode
Regulation
Input current =FS
10%
Input Voltage=FS
10%
Regulation
Input current =FS
10%
Input Voltage=FS
10%
Measurement
Measurement
Measurement
Input current=FS
10%
Input Voltage=FS
10%
Battery testing
function
Transition Mode
Weight 11.6lb. (5.25 kg)
Voltage 0 to 120V
Current 1mA to 30A
Power 300 W
Range Accuracy Resolution
0-18V
0-120V / 500V
0-3A
0-30A / 15A
1.5-18V
1.5-120V/500V
0-3A
0-30A /15A
0.1-10O ±(1%+0.3%FS) 0.001O
10-99O ±(1%+0.3%FS) 0.01O
100-999O ±(1%+0.3%FS) 0. 1O
1K-4KO ±(1%+0.8%FS) 1O
0-100W
100-300W
0-3A
0-30A /15A
1.5-18V
1.5-120V/500V
0-100W
100-300W
Input=0.8-120V / 500V Max measurement
capacity= 999A/H Resolution =10mA
±(0.05%+0.02%FS)
±(0.05%+0.025%FS)
±(0.2%+0.15%FS)
±(0.05%+0.02%FS)
±(0.05%+0.025%FS)
±(0.2%+0.15%FS)
±(0.1% + 0.1%FS)
±(0.2%+0.15%FS)
±(0.02% + 0.02%FS)
±(0.02% + 0.025%FS)
Timer range=1~60000sec
-1kHz Frequency error rate< 0.5%
8500
±(0.1%+0.1%FS)
±(0.1%+0.1%FS)
±(1%+0.1%FS)
±(1%+0.1%FS)
±(1%+0.1%FS)
±(1%+0.1%FS)
1mV
10mV
0.1mA
1mA
1mV CV Mode
10mV
0.1mA CC Mode
1mA
1mW CW Mode
10mW
0.1mA Current
1mA
1mV Voltage
10mV
1mW Power
10mW
42
Remote Operation Mode
DB9 in the rear panel of electronic load could connect with RS-232
through on TTL connector. The following information may help you to
know how to control the output of Electronic load through PC.
1. Communication Setting
Ensure setting the same baud rate in the communication address of
Electronic load and computer software .otherwise, the communication will fail.
You can adjust the baud rate and communication address in Menu button in
front panel of machine. Address of the Electronic load. ( 0 ~ 0XFE, default
value is 0)
1. Baud rate : (4800,9600,19200,38400, default value is 9600)
2. Data bit : 8
3. Stop bit : 1
4. sum: (NONE,ODD,EVEN,INITIAL SETTING is NONE)
PARITY = NONE
Start
Bit
8 Data Bits
Stop
Bit
2. DB9 Interface Details
DB9 in the rear panel of electronic load is TTL (5V) level signal .it can be
connecting with standard PC interface through the IT-E131 isolated
communication cable.
43
IT-E131 communication
cable
PC Load
COMPUTER
IT
IT-E131 ISOLATED
COMMUNICATION CABLE
859666668889942311
RX
TTL(5V)RS232 ISOLATION
TX
INSTRUMENT
CAUTION
Forbidden to connect DB9 connector in Electronic load directly with PC or
other RS232 port.
3. Frame Format
Frame length is 26 bytes. Details as following:
AAH Address Command 4—25bytes are information
content
Description :
1. Start bit is AAH, occupies one byte.
2. Address range from 0 to FE, occupies one byte.
3. Each command occupies one byte. Following is the command details.
20H Selecting the Remote control mode
21H Selecting the input on/off state
22H Setting the max input voltage
23H Reading the max setup input voltage.
Parity code
24H Setting max input current
25H Reading the max setup input current.
26H Setting max input power.
27H Reading the max setup input power.
28H Selecting CC/CV/CW/CR operation mode of Electronic load.
44
29H Reading the operation mode.
2AH Setting CC mode current value
2BH Reading CC mode current value
2CH Setting CV mode voltage value
2DH Reading CV mode voltage value
2EH Setting CW mode watt value
2FH Reading CW mode watt value
30H Setting CR mode resistance value
31H Reading CR mode resistance value
32H Setting CC mode transient current and timer parameter.
33H Reading CC mode transient parameter
34H Setting CV mode transient voltage and timer parameter.
35H Reading CV mode transient parameter
36H Setting CW mode transient watt and timer parameter
37H Reading CW mode transient parameter
38H Setting CR mode transient resistance and timer parameter
39H Reading CR mode transient parameter
3AH Selecting the list operation mode (CC/CV/CW/CR)
3BH Reading the list operation mode.
3CH Setting the list repeat mode (ONCE / REPEAT)
3DH Reading the list repeat mode.
3EH Setting the number of list steps.
3FH Reading the number of list steps
40H Setting one of the step’s current and time values.
41H Reading one of the step’s current and time values.
42H Setting one of the step’s voltage and time values.
43H Reading one of the step’s voltage and time values
44H Setting one of the step’s power and time values
45H Setting one of the step’s power and time values.
46H Setting one of the step’s resistance and time values
47H Reading one of the step’s resistance and time values
48H Setting list file name.
49H Reading list file name.
4AH Selection the memory space mode for storing list steps.
4BH Reading the memory space mode for storing list steps.
4CH Save list file in appointed area.
4DH Get the list file from the appointed area.
4EH Setting min voltage value in battery testing mode.
4FH Reading min voltage value in battery testing mode
50H Setting timer value of FOR LOAD ON
51H Reading timer value of FOR LOAD ON
52H Disable/Enable timer of FOR LOAD ON
45
53H Reading timer state of FOR LOAD ON
54H Setting communication address
55H Enable/Disable LOCAL control mode.
56H Enable/Disable remote sense mode.
57H Reading the state of remote sense mode.
58H Selecting trigger source.
59H Reading trigger source.
5AH Sending a trigger signal to trigging the electronic load.
5BH Saving user’s setting value in appointed memory area for recall.
5CH Recall user’s setting value in appointed memory area.
5DH Selecting FIXED/SHORT/TRAN/LIST/BATTERY function mode.
5EH Getting function mode state.
5FH Reading input voltage, current, power and relative state
60H Enter the calibration mode
61H Getting the calibration mode state.
62H Calibrate voltage value.
63H Sending the actual input voltage to calibration program.
64H Calibrate current value.
65H Sending the actual input current to calibration program.
66H Store the calibration data to EEPROM.
67H Setting calibration information.
68H Reading calibration information.
69H Restore the factory default calibration data.
6AH Reading product’s model, series number and version information.
6BH Reading the information of bar code.
6CH Setting information of bar code
12H The return information of command operation in electronic load.
NOTE
If control output of electronic through PC, please setting Electronic load is on
PC control state. Command is 20H. Make a calibration on input of electronic
Load, Ensure the calibration protection mode is OFF state when setting calibration
information.
If electronic load in calibration mode, user’s can’t change the input and operation mode
of electronic load
4. From 4th byte to 25th byte are information contents.
5. 26th is sum code, is the sum of the former 25 bytes.
46
4. Communication Protocol
1. Selecting the Remote control mode( 20H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th .byte
From 5th to 25th byte System reserve
26th byte Sum code
Command( 20H)
Operation mode( 0 is front panel operation mode , 1 is remote
operation mode )
NOTE
Front panel operation state is not in effect if electronic load is in calibration mode.
2. Selecting the input on/off state ( 21H)
1st byte Start bit ( AAH )
2nd byte Address(0—0XFE)
3rd byte
4th byte
From 5th to 25th byte System reserve
From26th byte Sum code
Command( 21H)
Input state( 0 is OFF, 1is ON)
3. Setting / Reading max input voltage( 22H/23H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The Lowest byte of max voltage value
5th byte The lower byte of max voltage value.
6th byte The higher byte of max voltage value.
7th byte The highest byte of max voltage value.
From 8th to 25th byte System reserve.
Command( 22H/23H)
26th byte Sum code.
47
NOTE
Represent a voltage upper limit value by 4 bytes of Hex. Lower bytes are in the front
location, higher bytes are in the later location. 1 represent 1mV.For Example : The
voltage upper limit is 16.000V, the hex code is 0X00003EB0, then the 4th byte is
0XB0, 5th byte is 0X3E, 6th byte is 0X00, 7TH byte is 0X00?
4. Setting / Reading the max input current .
( 24H/25H)
1st byte Start bit ( AAH )
2nd byte Address(0—0XFE)
3rd byte
4th byte The Lowest byte of max current value
5th byte The Lowest byte of max current value
6th byte The higher byte of max current value
7th byte The highest byte of max current value
From 8th to 25th byte System reserve
Command( 24H/25H)
26th bye Sum code
NOTE
Represent an current value by 4 bytes of Hex .Lower bytes are in the front location,
higher bytes are in the later location.1 represent 0.1mA,If setting upper limit is
3.0000A, the hex code is 0X00007530, then the 4th byte is 0X30, 5th is 0X75, 6th
is 0X00, 7th is 0X00?
5. Setting / Reading max input power( 26H/27H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of max power value.
5th byte The lower byte of max power value
6th byte The higher byte of max power value.
7th byte The highest byte of max power value.
Command( 26H/27H)
48
From 8th to 25th byte System reserve
26th byte Sum code
NOTE
Represent power value by 4 bytes of Hex. Lower bytes are in the
Front location, higher bytes are in the later location. 1 represents 1mW. If setting
upper value is 200.000W, the hex code is 0X00030d40, then the 4th byte is
0X40, 5th is 0X0d, 6th is 0X03, 7th is 0X00?
6. Selecting / Reading CC/CV/CW/CR operation
mode of Electronic load.( 28H/29H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte
From 5th
To 25th byte
26th byte Sum code
Command( 28H/29H)
Mode( 0 is CC mode, 1 is CV mode , 2 is CW mode , 3 is CR mode )
System reserve
7. Setting / Reading CC mode current value
( 2AH/2BH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of current value
5th byte The lower byte of current value.
6th byte The higher byte of current value.
7th byte The highest byte of current value.
From 8th
To 25th byte
Command ( 2AH/2BH)
System reserve
49
27th byte Sum code
NOTE
Represent current by 4 bytes of Hex. Lower bytes are in the front location,
higher bytes are in the later location. For example: current is 3.0000A, Hex
code is 0X00007530, NO. 4 bye is 0X30, NO. 5 bye is 0X75, NO. 6 bye is 0X00,
NO. 7 bye is 0X00?
8. Setting / Reading CV mode voltage value.
( 2CH/2DH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of voltage value.
5th byte The lower byte of voltage value.
6th byte The higher byte of voltage value.
7th byte The highest byte of voltage value.
From 8th to 25th
byte
26th byte Sum code
Command( 2CH/2DH)
System reserve
NOTE
Represent voltage by 4 bytes of Hex. Lower bytes are in the front location, higher
bytes are in the later location. For example :voltage is 16.000V, Hex code is
0X00003EB0, 4th byte 0XB0, 5TH byte is 0X3E, 6th byte is 0X00, 7th byte is 0X00?
9. Setting / Reading CW mode watt value
( 2EH/2FH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
50
3rd byte
4th byte The lowest byte of max power value
5th byte The lower byte of max power value
6th byte The higher byte of max power value
7th byte The highest byte of max power value
8th to 25th byte System reserve
26th byte Sum code
Command( 2EH/2FH)
NOTE
Represent power by 4 bytes of Hex. Lower bytes are in the front location, higher
bytes are in the later location. For example :power is 200.000W, Hex is
0X00030d40, 4th byte is 0X40, 5th byte is 0X0d, 6th byte is 0X03, 7th byte is
0X00?
10. Setting / Reading CR mode resistance value
( 30H/31H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of resistance value.
5th byte The lower byte of resistance value.
6th byte The higher byte of resistance value.
7th byte The highest byte of resistance value.
8th to 25th byte System reserve
26th byte Sum code
Command( 30H/31H)
NOTE
Represent resistance value by 4 bytes of Hex. Lower bytes are
in the front location, higher bytes are in the later location. If resistance value is
200.000R, Hex code is 0X00030d40, 4TH byte is 0X40, 5TH byte is 0X0d, 6th
byte is 0X03, 7th byte is 0X00?
51
11. Setting /Reading CC mode transient current
and timer parameter. ( 32H/33H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th byte to 7th
byte
From 8th byte to 9th
byte.
From 10th to 13th
byte
From 14th to 15th
byte
16th byte Transition operation mode (0 is CONTINUES, 1 is PULSE, 2 is
From 17th to 25th
byte
26th byte Sum code
Command( 32H/33H)
Setting value of current A (Lower bytes are in the front location,
higher bytes are in the later location.)
Time value of timer A ((Lower bytes are in the front location, higher
bytes are in the later location)
(1 represent 0.1mS)
Setting value of current B (Lower bytes are in the front location,
higher bytes are in the later location)
Time value of timer B (Lower bytes are in the front location, higher
bytes are in the later location)
(1 represent 0.1mS)
TOGGLED)
System reserve
12. Setting /Reading CV mode transient voltage
and timer parameter.( 34H/35H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 7th byte. Setting value of voltage A (Lower bytes are in the front location,
From 8th to 9th byte. Time value of timer A (Lower bytes are in the front location, higher
From 10th to 13th
byte
From 14th to 15th
byte
Command( 34H/35H)
higher bytes are in the later location)
bytes are in the later location)
(1represent 0.1mS)
Setting value of voltage B(Lower bytes are in the front location,
higher bytes are in the later location)
Time value of timer B (Lower bytes are in the front location, higher
bytes are in the later location)
(1represent 0.1mS)
52
16th byte Transient operation mode (0 is CONTINUES,1 is PULSE,2 is
TOGGLED)
From 17th to 25th
byte
26th byte Sum code
System reserve
13. Setting /Reading CW mode transient watt
and timer parameter( 36H/37H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 7th byte Setting value of power A (Lower bytes are in the front location, higher
From 8th to 9th byte Time value of timer A (Lower bytes are in the front location, higher
From 10th to 13th
byte
From 14th to 15th
byte
16th byte Transition operation mode (0 is CONTINUES,1is PULSE,2 is
From 17th to 25th
byte
26th byte Sum code
Command( 36H/37H)
bytes are in the later location)
bytes are in the later location)
(1 represent 0.1mS)
Setting value of power B(Lower bytes are in the front location, higher
bytes are in the later location)
Time value of timer B (Lower bytes are in the front location, higher
bytes are in the later location)
(1 represent 0.1mS)
TOGGLED)
System reserve
14. Setting /Reading CR mode transient
resistance and timer parameter( 38H/39H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th byte to 7th
byte
Command( 38H/39H)
Setting value of resistance A (Lower bytes are in the front location,
higher bytes are in the later location)
53
From 8th byte to 9th
byte.
From 10th byte to
13th byte
From 14th byte to
15th byte
16th byte Transition operation mode (0 is CONTINUES,1 is PULSE,2 is
17th byte to 25th
byte
26th byte Sum code
Time value of timer A (Lower bytes are in the front location, higher
bytes are in the later location)
(1 represent 0.1mS)
Setting value of resistance B (Lower bytes are in the front location,
higher bytes are in the later location)
Time value of timer B (Lower bytes are in the front location, higher
bytes are in the later location)
(1 represent 0.1mS)
TOGGLED)
System reserve
15. Selecting /Reading the list operation mode
(CC/CV/CW/CR)( 3AH/3BH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte
From 5
26th byte Sum code
th
to 25 byte System reserve
Command( 3AH/3BH)
LIST operation mode( 0is CC mode, 1 is CV mode ,2 is CW mode,3
is CR mode)
16. Setting /Reading the list repeat mode.
(3CH/3DH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte LIST repeat operation mode(0 is ONCE, 1 is REPEAT)
From 5th to 25th byte System reserve
26th byte Sum code
Command( 3CH/3DH)
54
17. Setting / Reading the number of list steps.
(3EH/3FH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4thto 5th byte LIST steps
From 6th to 25th byte System reserve
26th byte Sum code
Command( 3EH/3FH)
18. Setting / Reading one of the step’s current
and time values. (40H/41H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th byte to 5th
byte
From 6th to 9th byte Current value of current step (Lower bytes are in the front location,
From 10th to 11th
byte
From 12th to 25th
byte
26th byte Sum code
Command( 40H/41H)
Appointed one step
higher bytes are in the later location)
Time value of current step (Lower bytes are in the front location,
higher bytes are in the later location)
(1 represent 0.1MS)
System reserve
19. Setting / Reading one of the step’s voltage
and time values. (42H/43H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
th
to 5th
From 4
byte
Command( 42H/43H)
Appointed one step
55
From 6th byte to 9th
byte
From 10th to 11th
byte
From 12th to 25th
byte
26th byte Sum code
Voltage value of current step (Lower bytes are in the front location,
higher bytes are in the later location)
Time value of current step (Lower bytes are in the front location,
higher bytes are in the later location)
(1 represent 0.1MS)
System reserve
20. Setting / Reading one of the step’s power
and time values. (44H/45H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Appointed one step
From 5th to 8th byte Power value of current step (Lower bytes are in the front location,
From 9th to 10th byte Time value of current step (Lower bytes are in the front location,
From 11th to 25th
byte
26th byte Sum code
Command( 44H/45H)
higher bytes are in the later location)
higher bytes are in the later location) (1 represent 0.1MS)
System reserve
21. Setting / Reading one of the step’s power
and time values. (46H/47H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 5th byte Appointed one step
From 6th to 9th byte Resistance value of current step (Lower bytes are in the front
From 10th to 11th
byte
From 12th to 25th
byte
Command ( 46H/47H)
location, higher bytes are in the later location)
Time value of current step (Lower bytes are in the front location,
higher bytes are in the later location)
(1 represent 0.1MS)
System reserve
56
26th byte Sum code
22. Setting / Reading List file name (48H/49H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 13th byte LIST file name (ASSIC code )
From 14th to 25th
byte
26th byte Sum code
Command ( 48H/49H)
System reserve
23. Selection / Reading the memory space mode
for storing list steps. (4AH/4BH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte partition mode (1 | 2 | 4 | 8)
From 5th to 25th byte System reserve
26th byte Sum code
Command( 4AH/4BH)
24. Save / Get list file in appointed area..
(4CH/4DH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Storing area 1 ~ 8)
From 5th to 25th byte System reserve
26th byte Sum code
Command( 4CH/4DH)
57
25. Setting / Reading min voltage value in battery
testing mode.( 4EH/4FH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of voltage value.
5th byte The lower byte of voltage value.
6th byte The higher byte of voltage value.
7th byte The highest byte of voltage value.
From 8th to 25th byte System reserve
26th byte Sum code
Command( 4EH/4FH)
26. Setting / Reading timer value of FOR LOAD
ON (50H/51H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of time value in timer. (1 represent 1S)
5th byte The highest byte of time value in timer.
From 8th to 25th byte System reserve
26th byte Sum code
Time unit in Timer is S, 1S is represented by 1.
Command( 50H/51H)
27. Disable / Enable timer of FOR LOAD ON
(52H);
Reading timer state of FOR LOAD ON(53H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
Command( 52H/53H)
58
4th byte Timer state (0 is disable ,1 is enable )
From 5th to 25th byte System reserve
26th byte Sum code
28. Setting communication address (54H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte New communication address (0~0XFE)
From 5th to 25th byte System reserve
26th byte Sum code
Command ( 54H)
29. Enable/Disable LOCAL control mode. (55H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte State of LOCAL button(0:disable,1:enable “)
Command ( 55H)
From 5th to 25th byte System reserve
26th byte Sum code
30.Enable / Disable remote sense mode.(56H)
Reading the state of remote sense mode.(57H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Remote mode state (0:disable,1:enable)
5th to 25th byte System reserve
26th byte Sum code
Command( 56H/57H)
31. Selecting / Reading trigger source. (58H/59H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
Command ( 58H/59H)
59
4th byte
BATTERY)
From 5th to 25th byte System reserve
26th byte Sum code
Trigger mode (0:Keypad,1 External,2.command)
32. Sending a trigger signal to trigging the
electronic load. (5AH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 25th byte System reserve
26th byte Sum code
Command( 5AH)
33. Saving / Recall user’s setting value in
appointed memory area for recall. (5BH/5CH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Storing area ( )
From 5th to 25th byte System reserve
26th byte Sum code
Command( 5BH/5CH)
34. Selecting / Getting FIXED/SHORT/TRAN/LIST/
BATTERY function mode. (5DH/5EH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Work mode (0:FIXED,1:SHORT, 2:TRANSITION,3:LIST,4:
Command( 5DH/5EH)
From 5th to 25th byte System reserve
26th byte Sum code
60
35.Reading input voltage, current, power and
relative state. (5FH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 7th byte Actual input voltage value (Lower bytes are in the front location,
From 8th to 11th byte Actual input current value (Lower bytes are in the front location,
From 12th to 15th
byte
16th byte Operation state register
From 17th to 18th
byte
From 19th to 25th
byte
26th byte Sum code
BIT Signal Meaning
0
1
2
3
4
5
6
0
1
2
3
4
5
6
7
8
9
CAL
WTG
REM
OUT
LOCAL
SENSE
LOT
RV
OV
OC
OP
OT
SV
CC
CV
CP
CR
Command ( 5FH)
higher bytes are in the later location)
higher bytes are in the later location)
Actual input power value (Lower bytes are in the front location,
higher bytes are in the later location)
Demand state register
System reserve
Operation state register
Calculate the new demarcate coefficient
Wait for trigger signal
Remote control mode
Output state
LOCAL button state (0 is represent “not in effect “,1 is represent ‘in effect “)
Remote testing mode
FOR LOAD ON timer state
Demand state register
Input reverse voltage
Over voltage
Over current
Over power
Over temperature
Not connect remote terminal
Constant current
Constant voltage
Constant power
Constant resistance
61
36. Enter the calibration mode( 60H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Calibration mode select(0:disable;1:enable)
5th byte
6th byte
From 7th to 25th byte System reserve
26th byte Sum code
Command( 60H)
Calibration password( 0X85H)
Calibration password( 0X11H or 0X12H)
NOTE
If Load is not in protection state, users could do the calibration operation.
37. Getting the calibration mode state( 61H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte Calibration protection state
From 5th to 25th byte System
26th byte Sum code
NOTE
Represent calibration protection state by one byte. Each byte is defined as:
From high to low
7 6 5 4 3 2 1 0
Command( 61H)
0 byte: protection state, 0 represent not in the protection state , 1 represent
in protection state.
62
38. Calibrate voltage value( 62H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte
From 5th to 25th byte System reserve
26th byte Sum code
Command( 62H)
Voltage calibration point( 1~4)
NOTE
Current calibration standard points have four: 1, 2, 3, 4.
39. Sending the actual input voltage to
calibration program( 63H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of actual voltage
5th byte The lower byte of actual voltage
6th byte The higher byte of actual voltage.
7th byte The highest byte of actual voltage.
From 8th to 25th byte System reserve
26th byte Sum code
Command( 63H)
40. Calibrate current value( 64H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte
From 5th to 25th byte System reserve
26th byte Sum code
Command( 64H)
Current calibration point ( 1~4)
63
NOTE
Current calibration standard points have four: 1,2,3,4
41. Sending the actual input current to
calibration program (65H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th byte The lowest byte of actual current
5th byte The lower byte of actual current
6th byte The higher byte of actual current
7th byte The highest byte of actual current
From 8th to 25th byte System reserve
26th byte Sum code
Command( 65H)
42. Store the calibration data to EEPROM( 66H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 25th byte System reserve
26th byte Sum code
Command ( 66H)
NOTE
Finish the calibration operation, users should save the calibration parameter in
EEPROM with this command; users could use these data in next power on.
43. Setting / Reading calibration information
( 67H/68H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
64
3rd byte
From 4th to 23rd byte
24th byte System reserve
25th byte System reserve
26th byte Sum code
Command( 67H/68H)
Demarcate information( ASIC code)
44. Restore the factory default calibration data
( 69H)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 25th byte System reserve
26th byte Sum code
Command( 69H)
NOTE
User could use the initial calibration data of factory with this command.
45. Reading product’s model, series number and
version information( 6AH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 8th byte
9th byte The lowest byte of software version number(BCD code)
10th byte The highest byte of software version number(BCD code)
From 11th to 20th
byte
From 21st to 25th
byte
26th byte Sum code
Command( 6AH)
Mode information ( ASIC code)
Product series number ( ASIC code)
System reserve
For example:
65
Product’s series number is 000045, product mode is 8511,software version number is
V2.03, data as following
AA 00 31 38 35 31 31 00 03 02 ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ XX XX XX XX XX 57
46. Reading information in bar code (6BH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
From 4th to 22nd
byte
From 23rd to 25th
byte
26th byte Sum code
Bar code rule : All of bar cod of our products is distinguished by the former three
characters.
Al
Command ( 6BH)
Information in bar code( ASIC ? )
System reserve
0 0 1 0 0 4 1 0 0 y y m m 0 0 2 0 1 0
47. Setting information of bar code( 6CH)
1st byte Start bit ( AAH )
2nd byte Address (0—0XFE)
3rd byte
4th to 22nd byte
24th byte System reserve
25th byte System reserve
26th byte Sum code
Command( 6CH)
Product series number( ASIC code)
48. The return information of command
operation in electronic load( 12H)
1st byte Start bit ( AAH )
66
2nd byte Address (0—0XFE)
3rd byte
4th byte Command calibration result
From 5th to 25th byte System reserve
26th byte Sum code
Command( 12H)
NOTE
Receiving one frame command and verify them
If verify sum is wrong, return the parameter 90H
If setting parameter is wrong or over brim, return parameter A0H.
If command is not enforce, return to parameter B0H
If command is invalid, return to parameter C0H
Otherwise, return to parameter 80H
NOTE
Receiving one frame command and verify them
If verify sum is correct, return the relative reading data.
If verify sum is wrong , return the verify command( 90H)?
67
Limited One-Year Warranty
B&K Precision Corp. warrants to the original purchaser that its product and the
component parts thereof, will be free from defects in workmanship and
materials for a period of one year from the data of purchase.
B&K Precision Corp. will, without charge, repair or replace, at its’ option,
defective product or component parts. Returned product must be
accompanied by proof of the purchase date in the form a sales receipt.
To obtain warranty coverage in the U.S.A., this product must be registered by
completing and mailing the enclosed warranty card to B&K Precision Corp.,
22820 Savi Ranch Parkway, Yorba Linda, CA 92887 within fifteen (15) days
from proof of purchase.
Exclusions: This warranty does not apply in the event of misuse or abuse of
the product or as a result of unauthorized alterations or repairs. It is void if the
serial number is altered, defaced or removed.
B&K Precision Corp. shall not be liable for any consequential damages,
including without limitation damages resulting from loss of use. Some states
do not allow limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you.
This warranty gives you specific rights and you may have other rights, which
vary from state-to-state.
Model Number: ______________ Date Purchased: __________
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
714.921.9095
714.921.6422 Facsimile
68
Service Information
Warranty Service: Please return the product in the original packaging with
proof of purchase to the below address. Clearly state in writing the
performance problem and return any leads, connectors and accessories that
you are using with the device.
Non-Warranty Service: Return the product in the original packaging to the
below address. Clearly state in writing the performance problem and return
any leads, connectors and accessories that you are using with the device.
Customers not on open account must include payment in the form of a money
order or credit card. For the most current repair charges contact the factory
before shipping the product.
Return all merchandise to B&K Precision Corp. with pre-paid shipping. The
flat-rate repair charge includes return shipping to locations in North America.
For overnight shipments and non-North America shipping fees contact B&K
Precision Corp..
B&K Precision Corp.
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
Phone: 714- 921-9095
Facsimile: 714-921-6422
Email: service@bkprecision.com
Include with the instrument your complete return shipping address, contact name, phone
number and description of problem.
69
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
PN: 481-535-9-001
Printed in China
2005 B&K Precision Corp.
70
USA
TEL: 714-921-9095
FAX: 714-921-6422
www.bkprecision.com
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