VOLTCRAFT DLP-3303 User manual

Triple Output
Linear Programmable DC Power Supply
User Manual
■DLP-3303
■DLP-3306
■DLP-3603

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Table of Contents
1. General Safety Requirements ...................................................................................1
2. Safety Terms and Symbols ........................................................................................2
3. Quick Start...............................................................................................................3
3.1 Front/Rear Panel and User Interface .............................................................................. 3
3.1.1 Front Panel ...................................................................................................................................... 3
3.1.2 Rear Panel ....................................................................................................................................... 5
3.1.3 User Interface.................................................................................................................................. 5
Mode Icons ............................................................................................................................................................6
Status Icons............................................................................................................................................................7
3.2 General Inspection ........................................................................................................ 7
3.3 Power-On Check............................................................................................................ 7
3.4 Output Inspection ......................................................................................................... 8
3.4.1 Voltage Output Inspection .............................................................................................................. 8
3.4.2 Current Output Inspection .............................................................................................................. 8
4. Front Panel Operation ..............................................................................................9
4.1 Turn On/Off the Channel Output ................................................................................... 9
4.2 Set the Output Voltage/Current..................................................................................... 9
4.2.1 Set the Output Voltage.................................................................................................................... 9
4.2.2 Set the Output Current.................................................................................................................... 9
4.3 Over Voltage/Current Protection ..................................................................................10
4.3.1 Set O.V.P........................................................................................................................................ 10
4.3.2 Set O.C.P........................................................................................................................................ 11
4.4 Programmable Output..................................................................................................11
4.4.1 Data View ...................................................................................................................................... 11
4.4.2 Output Set ..................................................................................................................................... 11
4.4.3 Data process .................................................................................................................................. 12
4.4.4 Turn On/Off Programmable Output.............................................................................................. 13
4.5 Save Settings/Auto Record ...........................................................................................13
4.5.1 Save Settings ................................................................................................................................. 13
4.5.2 Auto Record................................................................................................................................... 14
4.5.3 View Record .................................................................................................................................. 14
4.6 Output mode ...............................................................................................................16
4.7 Utility Settings..............................................................................................................18
4.7.1 Brightness...................................................................................................................................... 18
4.7.2 Beeper ........................................................................................................................................... 18
4.7.3 Clock .............................................................................................................................................. 18

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4.8 System Info ..................................................................................................................18
4.8.1 View System Information .............................................................................................................. 18
4.8.2 Set as Default................................................................................................................................. 18
4.8.3 Update........................................................................................................................................... 19
4.9 Port Settings ................................................................................................................20
4.9.1 Serial port ...................................................................................................................................... 20
4.9.2 LAN Set .......................................................................................................................................... 21
4.9.3 LCD Test......................................................................................................................................... 21
4.9.4 Key Test ......................................................................................................................................... 21
5. Troubleshooting .....................................................................................................22
6. Technical Specifications .........................................................................................23
7. Appendix................................................................................................................25
7.1 Appendix A: Accessories ...............................................................................................25
7.2 Appendix B: General Care and Cleaning.........................................................................25

1.General Safety Requirements
1
1. General Safety Requirements
Before use, please read the following safety precautions to avoid any possible bodily
injury and to prevent this product or any other connected products from damage. To
avoid any contingent danger, ensure this product is only used within the ranges
specified.
Only a qualified person should perform internal maintenance.
To avoid Fire or Personal Injury:
Use Proper Power Cord. Use only the power cord supplied with the product and
certified to use in your country.
Product Grounded. This instrument is grounded through the power cord grounding
conductor. To avoid electric shock, the grounding conductor must be grounded. The
product must be grounded properly before any connection with its input or output
terminals.
Check all Terminal Ratings. To avoid fire or shock hazard, check all ratings and
markings on this product. Refer to the user manual for more information about
ratings before connecting to the instrument.
Do not operate without covers. Do not operate the instrument with covers or panels
removed.
Use the Proper Fuse. Use only the specified type and rating fuse for this instrument.
Avoid exposed circuit. Be careful when working on exposed circuitry to avoid risk of
electric shock or other injury.
Do not operate if any damage. If you suspect damage to the instrument, have it
inspected by qualified service personnel before further use.
Use your instrument in a well-ventilated area. Please keep well ventilated and
inspect the intake and fan regularly.
Do not operate in damp conditions. To avoid short circuiting to the interior of the
device or electric shock, please do not operate in a humid environment.
Do not operate in an explosive atmosphere. To avoid damages to the device or
personal injuries, it is important to operate the device away from an explosive
atmosphere.
Keep product surfaces clean and dry. To avoid the influence of dust or moisture in air,
please keep the surface of device clean and dry.

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2. Safety Terms and Symbols
Safety Terms
Terms in this manual (The following terms may appear in this manual):
Warning: Warning indicates conditions or practices that could result in injury or
loss of life.
Caution: Caution indicates the conditions or practices that could result in
damage to this product or other property.
Terms on the product. The following terms may appear on this product:
Danger: Indicates an immediate hazard or injury possibility.
Warning: Indicates a possible hazard or injury.
Caution: Indicates potential damage to the instrument or other property.
Safety Symbols
Symbols on the product. The following symbols may appear on the product:
Hazardous Voltage Refer to Manual
Protective Earth Terminal Chassis Ground
Public Ground

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3. Quick Start
3.1 Front/Rear Panel and User Interface
3.1.1 Front Panel
Figure 3-1 Front panel overview
①
LCD
User interface display
②
Numeric keys area
Parameter input, includes the numeric keys, decimal point and
backspace key.
③
Up and down
direction key
Select sub menu
④
Enter key
Enter menu or confirm the parameter entered
⑤
Knob
Select menu or change the value, pressing it has the same
effect as pressing the enter key
⑥
Left and right
direction key
Set sub menu or move the cursor
⑦
CH3 control area
Volt CH3 key:Set the output voltage of CH3
Curr CH3 key:Set the output current of CH3
ON/OFF CH3 key:Enable/disable the output of CH3

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⑧
CH2 control area
Blue Volt/CV key: Set the output voltage of CH2
Blue Curr/CC key: Set the output current of CH2
Blue ON/OFF key: Enable/disable the output of CH2
⑨
CH2 output
terminals
Channel 2 output connectors
⑩
MODE key
Switch between All Channel mode (CH1 & CH2 & CH3) and
Dual Channel Mode (CH1 & CH2).
⑪
CH1 output
terminals
Channel 1 output connectors
⑫
CH3 output
terminals
Channel 3 output connectors
⑬
USB Host port
Connect as a "host device" with an external USB device, such
as connect a USB disk to the instrument.
⑭
Power button
Turn on/off the instrument
⑮
CH1 control area
Yellow Volt/CV key: Set the output voltage of CH1
Yellow Curr/CC key: Set the output current of CH1
Yellow ON/OFF key: Enable/disable the output of CH1
⑯
Function keys
Utility key: Menu of output mode, utility, info, port settings.
Record key: Save settings, auto record, and view recording.
Program key: Programmable output.
KeyLock key: Press and hold this key for 5 seconds to lock
the panel keys. Unlock method: Press and hold the key for
more than 5 seconds, and release.
Instructions for panel key indicator
ON/OFF key: The indicator will be lit after you turn on the channel.
Volt/CV key: The indicator will be lit when the channel is in Constant Voltage output
mode.
Curr/CC key: The indicator will be lit when the channel is in Constant Current output
mode.

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3.1.2 Rear Panel
Figure 3-2 Rear panel overview
①
Local Area
Network (LAN)
Connector
The power supply
can be connected to the network for
remote control via this connector.
②
USB Device
Connector
Connect as a "slave device" with an external USB device, such
as connect the instrument to a PC.
③
COM Connector
Connect the power supply with external equipment as serial
port.
④
Power socket
AC input connector
⑤
Fuse
Line fuse
⑥
Fan
Fan inlet
3.1.3 User Interface
When the output mode is in independent output, or channel tracking mode, there are
two display modes: All channel mode (CH1 & CH2 & CH3), Dual channel mode (CH1 &
CH2). Press the Mode panel key to switch between the modes.
All Channel Mode

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Channel 1 Channel 2
Set values of voltage
Actual current output
Set values of O.V.P/O.C.P
CV: Constant Voltage output
CC: Constant Current output
Actual power output
Status icons
Actual voltage output
Set values of current
Mode icon
Figure 3-3 User interface in All channel mode
Dual Channel Mode
Set values of voltage
Actual current output
Set values of O.V.P/O.C.P
CV: Constant Voltage output
CC: Constant Current output
Actual power output
Status icons
Channel 1 Channel 2 Channel 3
Actual voltage output
Set values of current
Mode icon
Figure 3-4 User interface in Dual channel mode
Mode Icons
Icons
Instruction
All mode, display CH1, CH2 and CH3
Dual channel mode, display CH1 & CH2
The output mode is parallel tracking
The output mode is series tracking

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Status Icons
Icons
Instruction
Connected to the network via LAN connector
Connected as a slave device with PC
A USB device is connected
Recording the current output
The panel keys are locked
The beeper is turned on
3.2 General Inspection
When you receive your new power supply, it is recommended that you check the
instrument following these steps:
1. Check for transportation damage.
If it is found that the packaging carton or the foamed plastic protection cushion has
suffered serious damage, do not throw it away until the complete device and its
accessories have been electrically and mechanically checked.
2. Check the Accessories
The supplied accessories are described in the "Appendix A: " of this Manual. Please
ensure that all the listed accessories are present and undamaged, if any problems
are found please contact your distributor.
3. Check the Complete Instrument
If there is any physical damage, operational fault, or performance issue please
contact your distributor. If there is any transportation damage to the instrument
please ensure you keep the original packaging. Ideally you should always keep the
original packaging if the instrument must be returned for repair.
3.3 Power-On Check
(1) Connect the instrument to the AC supply using the supplied power cord.
Warning:
To avoid electric shock, the instrument must be grounded properly.
(2) Push the power button on the front panel, the keys will light and the screen will

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show the boot screen.
3.4 Output Inspection
Output inspection is to ensure that the instrument can achieve its rated outputs and
properly respond to operation from the front panel. For the procedures below, it is
suggested that you read "Turn On/Off the Channel Output" on page 9 and "Set the Output
Voltage/Current" on page 9.
3.4.1 Voltage Output Inspection
The following steps verify basic voltage functions without load:
(1) When the instrument is under no load, select a channel and ensure the output
current setting for this channel is not at zero.
(2) Turn on the channel output, then ensure the channel is in Constant Vo l t a ge output
mode.
(3) Set some different voltage values on this channel; check if the actual voltage value
displayed is close to the set voltage value, and also that the actual current value
displayed is nearly to zero.
(4) Check that if the output voltage can be adjusted from zero to the maximum rating.
3.4.2 Current Output Inspection
The following steps check basic current functions with a short across the power supply's
output:
(1) Connect a short across (+) and (-) output terminals with an insulated test lead on this
channel. Use a wire size sufficient to handle the maximum current.
(2) Set the output voltage to the maximum rating on this channel.
(3) Turn on the channel output. Ensure the channel you used is in Constant Current
output mode.
(4) Set some different current values on this channel; check if the actual current value
displayed is close to the set current value, and to check if the actual voltage value
displayed is nearly zero.
(5) Check that if the output current can be adjusted from zero to the maximum rating.
(6) Turn off the channel output and remove the short circuit from the output terminals.

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4. Front Panel Operation
4.1 Turn On/Off the Channel Output
Press the yellow ON/OFF key to turn on/off the Channel 1 output.
Press the blue ON/OFF key to turn on/off the Channel 2 output.
Press the ON/OFF CH3 key to turn on/off the Channel 3 output.
4.2 Set the Output Voltage/Current
4.2.1 Set the Output Voltage
Set the output voltage of CH1
Press the yellow Volt/CV key, the first digit of the CH1 set voltage is flashing,
indicating the value is editable. There are two methods to change the value.
Modify: Turn the knob to change the value. Press the ＜/＞key to move the
cursor. Press the knob or the key to confirm.
Input: Use the numeric keys to input, the input box of Channel 1 output voltage will
pop up. Enter a desired value. Press the key to confirm.
Set the output voltage of CH2
Press the blue Volt/CV key to enter edit mode. You can set the value in the same way
as CH1 above.
Set the output voltage of CH3
Press the Volt CH3 key to enter edit mode. You can set the value in the same way as
CH1 above.
4.2.2 Set the Output Current
Set the output current of CH1
Press the yellow Curr/CC key, the first digit of the CH1 set current is flashing,
indicating the value is editable. There are two methods to change the value.
Modify: Turn the knob to change the value. Press the ＜/＞key to move the
cursor. Press the knob or the key to confirm.
Input: Use the numeric keys to input, the input box of Channel 1 output current will
pop up. Enter a desired value. Press the key to confirm.
Set the output current of CH2

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Press the blue Curr/CC key to enter edit mode. You can set the value in the same way
as CH1 above.
Set the output current of CH3
Press the Curr CH3 key to enter edit mode. You can set the value in the same way as
CH1 above.
Note: If the input value is out of the rated range, the box prompts "ERROR"; you need to
input another value within the rated range.
4.3 Over Voltage/Current Protection
When the Over Voltage Protection (O.V.P) or Over Current Protection (O.C.P) is enabled,
once the output voltage/current reaches the set value of O.V.P/O.C.P, the instrument will
cut off the output, a warning will show on the screen.
Note:
When the instrument disables the output due to protection, after you make some
adjustments, the channel must be restarted to output normally.
This function can keep the power output from exceeding the load rating to protect the
load.
4.3.1 Set O.V.P
Set the O.V.P of CH1
Press the yellow Volt/CV key, the first digit of the CH1 set voltage is flashing. Press
the ▼key, the first digit of the CH1 O.V.P is flashing, indicating the value is editable.
There are two methods to change the value.
Modify: Turn the knob to change the value. Press the ＜/＞key to move the
cu rso r. Press the knob or the key to confirm.
Input: Use the numeric keys to input, the input box of Channel 1 limit voltage will
pop up. Enter a desired value. Press the key to confirm.
Set the O.V.P of CH2
Press the blue Volt/CV key, then press the ▼key to enter edit mode. You can set the
value in the same way as CH1 above.
Set the O.V.P of CH3
Press the Volt CH3 key, then press the ▼key to enter edit mode. You can set the
value in the same way as CH1 above.

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4.3.2 Set O.C.P
Set the O.C.P of CH1
Press the yellow Curr/CC key, the first digit of the CH1 set current is flashing. Press
the ▼key, the first digit of the CH1 O.C.P is flashing, indicating the value is editable.
There are two methods to change the value.
Modify: Turn the knob to change the value. Press the ＜/＞key to move the
cursor. Press the knob or the key to confirm.
Input: Use the numeric keys to input, the input box of Channel 1 limit current will
pop up. Enter a desired value. Press the key to confirm.
Set the O.C.P of CH2
Press the blue Curr/CC key, then press the ▼key to enter edit mode. You can set the
value in the same way as CH1 above.
Set the O.C.P of CH3
Press the Curr CH3 key, then press the ▼key to enter edit mode. You can set the
value in the same way as CH1 above.
4.4 Programmable Output
The programmable output function can preset up to 100 groups of timing parameters.
When you turn on the programmable output, the instrument will output the
pre-specified voltage, current in pre-specified time.
4.4.1 Data View
Press the Program key. The Data view menu is selected.
(1) The Memory sub menu is selected. Press the ＜/ ＞key to select Internal or
External.
(2) Press the ▼key to select Import submenu. Press the key to import data.
(3) Press the ▼key to select Export submenu. Press the key to export data.
Note: When the memory is set as External, the programmable data file will be export
to U disk, the directory is DLPXXXX\Program (DLPXXXX is the model).
(4) Press the ▼key to select Clear Data submenu. Press the key to clear data.
4.4.2 Output Set
Press the Program key, turn the knob to select [Output Set].
(1) The Cycle Mode sub menu is selected. Press the ＜/ ＞key to select Oder or

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Loop.
(2) Press the ▼key to select Start Point submenu. Use the numeric keys to input (1 to
100), press the key to confirm.
(3) Press the ▼key to select Stop Point submenu. Use the numeric keys to input (1 to
100), press the key to confirm.
(4) Press the ▼key to select Start submenu. Press the ＜/ ＞key to select the
channel (CH1, CH2 or ALL), press the key to enter the data processing interface
and output the selected channel.
4.4.3 Data process
You can set the programmable parameters of CH1 and CH2, including voltage, current
and output time. This function allows up to 100 parameter groups of each channel.
Press the Program key, turn the knob to select [Data process].
Edit:
(1) The Edit sub menu is selected. The operation instruction shows on the screen. Press
the key to enter the data processing interface.
(2) In the data processing interface, Press the ＜/ ＞key to move the cursor left and
right. Press the ▲/ ▼key to move the cursor up and down. Turn the knob to move
the cursor between CH1 and CH2. Use the After selecting the parameter, use the
numeric keys to enter a desired value, press the key to confirm.
Figure 4-1 Data processing Interface
(3) Press ←to back to sub menu selection.
Graph process is used to configure the graphical display in the Data processing
interface.
(1) Press the ▼key to select Graph process submenu. Press the key to enter the
editing interface.

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(2) In the Graph processing interface, Press the ＜/ ＞key to move the cursor left
and right. Press the ▲/ ▼key to move the cursor up and down. Press the key
to check or uncheck the item. If the item is checked, the corresponding line will be
displayed in the chart in the data processing interface.
(3) Press ←to back to sub menu selection.
4.4.4 Turn On/Off Programmable Output
In the data processing interface:
Independent Mode
Press yellow ON/OFF key to turn on/off the programmable output of Channel 1.
Press blue ON/OFF key to turn on/off the programmable output of Channel 2.
Parallel/Series Mode
Press yellow ON/OFF key to turn on/off the programmable output.
In the data processing interface:
Press the ▼key to select Start submenu. Press the ＜/ ＞key to select the channel
(CH1, CH2 or ALL), press the key to enter the data processing interface and output
the selected channel.
Note:
In the process of programmable output, closing the channel output will reset the timer;
turning on the channel again will restart the programmable output and the timer.
4.5 Save Settings/Auto Record
4.5.1 Save Settings
You can store, recall and delete current setting parameters. The storage memory could be
set as internal or external (USB flash device). Up to 100 groups of settings can be saved.
Press the Record key. The Save Settings menu is selected.
(1) The Memory sub menu is selected. Press the ＜/ ＞key to select Internal or
External.
(2) Press the ▼key to select Save submenu. Press the ＜/ ＞key to select the
channel (CH1, CH2 or CH3), press the key to save the setting of the selected
channel.
Note: When the memory is set as External, the setting will be saved to U disk as a
CSV file, the directory is DLPXXXX\Record_Option (DLPXXXX is the model).

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(3) Press the ▼key to select Delete submenu. Press the key, a red box will show
in the table, indicating the selected item. Press the ▲/ ▼key to select. Press the
＜/ ＞key to turn the page. Press the key to delete. Press ←to back to
sub menu selection.
(4) Press the ▼key to select Recall submenu. Press the key, a red box will show in
the table, indicating the selected item. Press the ▲/ ▼key to select. Press the ＜
/ ＞key to turn the page. Press the key to recall. Press ←to back to sub
menu selection.
4.5.2 Auto Record
Press the Record key, turn the knob to select [Auto Record].
(1) The Memory sub menu is selected. Press the ＜/ ＞key to select Internal or
External.
(2) Press the ▼key to select Interval submenu. Use the numeric keys to set the record
interval, press the key to confirm.
(3) Press the ▼key to select Points submenu. Use the numeric keys to set the points,
press the key to confirm.
(4) Press the ▼key to select Record Status submenu. Press the ＜/ ＞key to select
the channel (CH1, CH2 or CH3), press the key to start recording the output of
the selected channel. Press the key again to stop recording. During recording,
the icon will be lighted on the status bar.
Note: When the memory is set as External, the record file will be saved to U disk as a
CSV file, the directory is DLPXXXX\Record_Auto (DLPXXXX is the model).
4.5.3 View Record
Press the Record key, turn the knob to select [View Record].

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(1) Press the ▼key to select Memory submenu. Press the ＜/ ＞key to select
Internal or External.
(2) When the Memory is set as Internal, press the ▲key to select Read submenu. Press
the ＜/ ＞key to select the channel (CH1, CH2 or CH3), press the key to
read the recording file of the selected channel. After reading successfully, if the
display mode is set as Table, a red box will show in the table, indicating you can
press the ＜/ ＞key to turn the page. Press ←to back to sub menu
selection.
When the Memory is set as External, press the ▲key to select Export submenu.
Press the ＜/ ＞key to select the channel (CH1, CH2 or CH3), press the key
to export the recording file of the selected channel onto the U disk. The directory is
DLPXXXX\Record_Auto (DLPXXXX is the model).
(3) Press the ▼key to select Display submenu. Press the ＜/ ＞key to select Graph
or Table.
Graph display mode
Table display mode
(4) Press the ▼key to select Clear submenu. Press the key to clear the recording

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file.
4.6 Output mode
Output mode can simplify the parameter inputting of CH1 and CH2. Output mode setting
is only for CH1 and CH2, without affecting CH3. There are four output modes:
Independent Output
The parameter of each channel can be set independently.
Parallel track
When CH1 and CH2 are connected in parallel, you can select this mode to simplify
the parameter inputting. You just need to set the parameters of the combined
channel. The voltage rating is same as the single channel; the current rating is the
sum of CH1 and CH2 current rating.
Press the yellow ON/OFF key to turn on/off the combined channel.
Parallel CH1 and CH2
in parallel CH3
The connection method of the parallel connection of CH1 and CH2 is as shown in the
figure below.
＋－＋－
CH2CH1
I2
RL
I1
IL
I
L
= I
1
+ I
2
POWER SUPPLY
Series track

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When CH1 and CH2 are connected in series, you can select this mode to simplify the
parameter inputting. You just need to set the parameters of the combined channel.
The voltage rating is the sum of CH1 and CH2 voltage rating; the current rating is
same as the single channel.
Press the yellow ON/OFF key to turn on/off the combined channel.
Series CH1 and CH2
in series CH3
The connection method of the series connection of CH1 and CH2 is as shown in the
figure below.
＋－＋－
CH2CH1
V2
RL
V1
VL＋－V
L
= V
1
+ V
2
POWER SUPPLY
Channel track
In independent output mode, set the output parameters of CH1 and CH2, and then
enter the channel track mode, if the parameters of any one channel are changed, the
other channel will change proportionally.
For example, in independent output mode, set the CH1 voltage to 2V, current to 1A;
set the CH2 voltage to 4V, current to 2A. After entering channel track mode, if CH1
voltage is set to 6V, CH2 voltage will be adjusted to 12V proportionally. If CH1 current
is set to 2A, CH2 current will be adjusted to 4A proportionally.
Note: If the setting value is out of the rated range, it will be set to the maximum.