I-Tech IT6302 User manual

IT6302 user manual
USER MANUAL
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USER MANUAL
Triple Output
Programmable DC Power Supply
Model IT6302
© Copyright belongs to ITECH Co. ltd.
Ver2.4/Sep. 2019/ IT6300-508

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Security regulation............................................................................................................................................ 3
Safety symbols .................................................................................................................................................. 3
Certification and Quality Assurance................................................................................................................ 3
Introduction........................................................................................................................................................ 4
Chapter 1 Quick Reference............................................................................................................................... 5
1.1 The front panel and rear panel description........................................................................................... 5
1.1.1 Front panel......................................................................................................................................... 5
1.1.2 The Rear Panel.................................................................................................................................. 7
1.1.3 Dimensions............................................................................................................................................ 8
1.2 Preliminary Checkout.............................................................................................................................. 8
1.2.1 Check the list of supplied items...................................................................................................... 8
1.2.2 Power on Pre-check.......................................................................................................................... 8
1.2.3 Checkout procedure......................................................................................................................... 9
1.2.4 Output verification.......................................................................................................................... 10
1.2.5 If the power supply does not turn on.............................................................................................11
1.2.6 How to exchange the fuse...............................................................................................................11
1.2.7 Adjust the carrying handle............................................................................................................. 12
Chapter 2 Specification................................................................................................................................... 12
2.1 Specification............................................................................................................................................. 12
2.2 Additional features................................................................................................................................... 14
Chapter 3 Front-panel Operation ................................................................................................................... 15
3.1 Front-panel Operation Overview.......................................................................................................... 15
3.2 Panel Description .................................................................................................................................. 16
3.3 VFD Description..................................................................................................................................... 17
3.4 Menu Description................................................................................................................................... 17
3.5 Panel Operation ..................................................................................................................................... 18
3.5.1 Channel Operation.......................................................................................................................... 18
3.5.2 OUT ON/OFF.................................................................................................................................... 18
3.5.3 Set Voltage....................................................................................................................................... 18
3.5.4 Current Operation........................................................................................................................... 19
3.5.5 Save and Recall Operation............................................................................................................. 19
3.5.6 LVP operation.................................................................................................................................. 20
3.5.7 Key Lock Set.................................................................................................................................... 20
3.5.8 Protections ...................................................................................................................................... 20
3.6 Menu Description................................................................................................................................... 20
4.1 Communication module introduction ....................................................................................................... 26
4.1.1 IT-E121 communication module ....................................................................................................... 26
4.1.2 IT-E122 communication module ....................................................................................................... 26
4.2 Communication between power supply and PC ................................................................................ 27

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IT6302 DC programmable power supply
About your safety
Please do not install replacement parts in the instrument, or perform any unauthorized
modification. Please send the instrument to our company's maintenance department for
maintenance, to ensure its security features.
Please refer to the manual for specific information warning or precautions to avoid personal
injury or equipment damage.
There is no part that the operators can maintenance. If maintenance service is required,
please contact trained service personnel.
Security regulation
To prevent electric shock, a non-authorized personnel is strictly not allowed to open the
machine.
This equipment is strictly prohibited for use in life support systems or any other device with
security requirements.
We can’t accept responsibility for any direct or indirect financial damage or loss of profit that
might occur when using the electronic load.
Safety symbols
Warning
It reminds the user, note some operating procedures, practices, conditions and other
matters that may lead to human casualties.
Notes:
It reminds the user of some operating procedures, practices, conditions and other matters
that may result in instrument damage or data lose forever.
Connect it to safety earth ground using the wire recommended in the user manual.
The symbol on an instrument indicates that the user should refer to the operating
instructions located in the manual.
High voltage danger
Certification and Quality Assurance
IT6302 programmable DC power supply fully meets all of the technical specification in the
manual.
Warranty

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Our Company gives one year warranty for the materials and manufacturing of the product
since the date of shipment.
Warranty Service
For the warranty service or repair the product, the product must be returned to the
designated maintenance units. Return the product to us for warranty service, the customer
should pre-pay the one-way Freight to the maintenance department, and our company is
responsible for the return shipping cost.
If products are returned from other countries for maintenance service, then the customer
should pay all freight, duties and other taxes.
Guarantee limit
The guarantee does not apply to the damage caused by the following conditions:
Improper or inadequate maintenance to the products by customer;
Customers use their own software or interface;
Unauthorized modification or misuse;
Operate this product not in the specified environment, or at the wrong place configuration
and maintenance;
Damage from Customer self-installation of circuit, or defects due to customers use their
products;
Product model or serial number of the fuselage has been altered, deleted, removed or
made illegible;
Damage caused by accidents including but not limited to lightning, water, fire, abuse or
neglect.
Notice
If the content of this manual is subject to change, we will not notice additionally
Introduction
IT6302 triple output programmable DC power supply,the output voltage or current of each
channel can be set from 0 to max rated value.
The triple output power supply provides you with high-resolution, high accuracy and high
stability, and supports over voltage, over temperature protection; Provides a serial or
parallel mode, used to extend the voltage or current output capacity. Resolution reaches up
to 10mV/1mA that it can meet the needs of a variety of applications, and is a great choice
for University or R & D department and the manufacturer. The main features and
advantages are as follows:
⚫Triple output voltage, all are adjustable. CH1, CH2 adjust range: 0~30V, CH3 adjust
range :0~5V, current range : 0~3A
⚫CH1 and CH2 can set to serial/parallel/track mode, series to max 60V, parallel to max

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6A.
⚫The voltage and current for the three channels can be displayed at the same time
⚫Small size of 1/2 2U
⚫VFD display
⚫Function keys with LED light
⚫High accuracy , resolution and stability
⚫Switch to control the output status
⚫Limited voltage and over heat protection
⚫Intelligent fan control, energy conservation, noise reduction
⚫Support RS232/USB communication interface, IT-E121 is for RS232
communication,IT-E122 for USB communication*
⚫Low ripple and low noise
⚫Shut off memory function
⚫Can be monitored by computer software
⚫Memory capacity of 27 groups, for save and recall
⚫Can adjust the voltage or current by knob
⚫Can adjust the stepping by Left/right arrow button
*IT-E121 and IT-E122 are optional accessories, not standard accessories.
Chapter 1 Quick Reference
1.1 The front panel and rear panel description
1.1.1 Front panel

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Picture 1
1
VFD display
2
Rotary knob
3
Power switch, Local and Shift key
4
Numeric keys and ESC escape key
5
Function keys
6
Up/Down/Left/Right keys
7
Output terminal
VFD display description
The status flags will be described in chapter 3.3.
Output terminal

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Note: If the power supply is used to charge the battery, you should pay attention to
the positive and negative polarity; otherwise you may burn the power supply!
1.1.2 The Rear Panel
Picture 2
1
Ventilation holes
2
TTL
3
110V/220V AC power selection switch
4
Fuse
5
AC power inlet

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1.1.3 Dimensions
The dimension of IT6302 power supply:
Unit: millimeter (mm)
1.2 Preliminary Checkout
The following steps help you verify that the power supply is ready for use.
1.2.1 Check the list of supplied items
Verify that you have received the following items with your power supply, if anything is
missing, contact your authorized supplier.
1. Power cord
2. User manual
3. Calibration report
4. Certificate
1.2.2 Power on Pre-check
Before operation the power supply, please read the following safety guide:
Warning: The AC input voltage is 110V or 220V; please check the switching at the
bottom of the power supply, to make sure it matches the voltage in your
city. Otherwise, the power supply may be damaged.

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Warning: The power supply provides a three-wire power cord; you should plug it
to a three cord junction box. You should also make sure the power supply is
well grounded.
Warning: The connection wire should have enough current capacity that it can
bear the max rated current/short current of the power supply and not get
too hot.
Warning: To avoid any fire or electric shock, please ensure the AC input voltage
fluctuation not exceed 10% of the working voltage range.
Note: In some situation, use the mis-configured main voltage for the instrument may
cause the main fuse blew.
Note: If the power supply is used to charge a battery, please pay attention to the
positive and negative polarity to avoid any damage.
After power up, the instrument will automatically perform a self test routine. If the power
supply doesn’t work, then refer to section 1.2.5.
1.2.3 Checkout procedure
After power on, during the self test, the following should be displayed on the VFD:
Init…
Picture 3
Followed by
Picture 4
The first row displays the voltage value for the three channels; the second row displays the
current value or the output OFF state.
About 1S later, if EEPROM was damaged, then the VFD will display (about 2S):
EEP Err
Picture 5
10.00V 11.00V 3.00V
0.000A 0.000A 0.000A

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If the latest operation state of the power supply was lost, then the VFD will display (about
2S):
Syst Lost
Picture 6
During channel scan, the VFD will display:
Scan Chan
Picture 7
When checkout for one channel is failed, then the VFD will display (about 2S):
Scan Chan
Chan Lost
Picture 8
When the calibration data of one or more channel is lost, then the VFD will display (about
2S):
Scan Chan
Cal Lost
Picture 9
When the factory calibration data of one or more channel is lost, then the VFD will display
(about 2S):
Scan Chan
Fact Lost
Picture 10
1.2.4 Output verification
The following procedures verify that the power supply outputs the correct voltage and
current levels and properly responds to entries from the front panel.
Voltage Output Check
The following steps verify basic voltage function without load.
1) Press Power key to turn on the power supply
2) Press
On/Off
key to enable the output
Note: when key is gray, the power supply is in SET mode, then the VFD
displays the set voltage and current; when the key is lit, then the power supply is
in METER mode, the actual voltage and current display on the VFD. When the
output is OFF, the ---- will display at the current display area.
3) Set the voltage value
Adjust the voltage, then press to lit the key (indicates it is in the METER mode),
make sure that the set value and output value are same, and if the current displayed on
the VFD is nearly 0A.
4) Make sure the voltage can be adjusted from zero to the maximum rated value.
5) Check the other two channels by the same method.

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◼Current output Check
The following steps check the basic current functionality by shorting the power supply’s
output.
1) Press Power key to turn on the power supply
2) Press
On/Off
to disable the output, ensure the output is OFF.
3) Connect a short across (+) and (-) output terminals with an insulated test lead, use a
wire sufficient to handle the maximum current.
4) Adjust the voltage value to 3V
5) Press
On/Off
to enable the output
6) Adjust the current
Set some different current values, in METER mode, check whether the voltage value on
VFD is near 0v, and the current on it is close to the value you set.
7) Make sure that the current can be adjusted from 0 to full rated value.
8) Disable the output and then remove the short wire
9) Check the other two channels by the same method.
1.2.5 If the power supply does not turn on
Use the following steps to help resolve the problems you might encounter when turn
on the instrument:
1) Verify that there is AC power applied to the power supply
First, verify that the power cord is firmly plugged into the power receptacle on the rear
panel of the power supply. You should also make sure that the power source you
plugged the power supply into is energized. Then, verify that the power supply is turned
on.
2) Verify the power-line voltage setting
Make sure the voltage selector switch is set according to the present line voltage
(110VAC or 220VAC) when the power supply is shipped from the factory. Change the
voltage setting if it’s not correct.
3) Verify the correct power-line fuse is installed
If the fuse was damaged, please see the table below to replace the fuse for your power
supply.
Model
Fuse Spec
IT6302
Fuse 3.15A (220V AC)
Fuse 6.30A (110V AC)
1.2.6 How to exchange the fuse
Open the small plastic cover below the power supply input socket on the back panel with a
screwdriver, and you can see the fuse in it, please use the specifications in line fuse.
Remove the power cord and then use a screwdriver to remove the fuse box.

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Use the same specification of fuse to replace the old one, install it to the fuse box and then
insert.
1.2.7 Adjust the carrying handle
To adjust the position, grasp the handle by the sides and pull outward. Then rotate the
handle to the desired position.
Bench operation Handle
Picture 11
Chapter 2 Specification
2.1 Specification

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Parameters
IT6302
Rated values
(0 °C - 40 °C)
Voltage
0-30V×2, 0-5V×1
Current
0-3A×2, 0-3A×1
Power
CH1:90W,CH2:90W,CH3:15W
Load regulation
(%of output + offset)
Voltage
≤0.01%+4mV
Current
≤0.2%+3mA
Line regulation
(%of output + offset)
Voltage
≤0.01%+4mV
Current
≤0.2%+3mA
Setup resolution
Voltage
10mV
Current
1mA
Read-back resolution
Voltage
10mV
Current
1mA
Setup accuracy
(Within 12 months)
(25°C ±5 °C)
(%of output + offset)
Voltage
≤0.06%+20mV
Current
≤0.2%+10mA
Read-back accuracy
(25 °C ±5 °C)
(%of output + offset)
Voltage
≤0.06%+20mV
Current
≤0.2%+10mA
Ripple and noise
(20Hz-20MHz)
Voltage
≤5mVp-p and 1mVrms
Current
≤6mArms
Setup Temperature
Coefficient
( %of
Output/℃+Offset)
Voltage
300ppm/℃
Current
300ppm/℃
Readback
Temperature
Coefficient
( %of
Output/℃+Offset)
Voltage
300ppm/℃
Current
300ppm/℃
Rise time
Voltage
CH1≤150mS,CH2≤150mS,CH3≤150mS
Fall time
Current
CH1≤2.5S,CH2≤2.5S,CH3≤200mS
Transient Response
Time
≤200uS (Typical)
Test conditions: 50% -100% Freq = 1K recovered to 75mV
AC Input
Voltage
1
110V±10%
Voltage
2
220V±10%
Frequen
cy
47HZ-63HZ

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2.2 Additional features
Suggested calibration frequency: 1time /Year
Line voltage supported (can be selected by the switch on the rear panel)
Option 01: 220VAC ±10%, 47 to 63 Hz
Option 02: 110 VAC ±10%, 47 to 63 Hz
Max input power
Module
IT6302
Power
750VA
Cooling
Fans
Operation temperature
0 to 40 °C
Storage temperature
-20 to 70 °C
Environmental conditions
Indore use only, max humidity 80%, no condensation.
Setup stability-8h
(%of Output +Offset)
Voltage
≤0.01%+10mV
Current
≤0.1%+5mA
Readback stability-8h
(%of Output +Offset)
Voltage
≤0.01%+20mV
Current
≤0.1%+5mA
Fuse specification
6.3A(110V)/3.15A(220V)
Command Response
Time
20mS (Typical)
Power Factor
0.7 (Typical)
Maximum input current
4.5A(110V)/2.2A(220V)
Maximum input
apparent power
700VA
Storage temperature
-10℃~70℃
Protective function
LVP/OTP
standard Interface
COM(TTL)
Isolation
( output to ground)
200V
Working temperature
0~40℃
Dimension ( mm)
214.5mmW*88.2mmH*354.6mmD
Weight( net)
7.1Kg

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Chapter 3 Front-panel Operation
So far we have covered the quick start chapter which briefly introduced the front panel
operation and how to check basic voltage and current functionality. This chapter describes
in detail how to operate the instrument manually via the front-panel keys.
3.1 Front-panel Operation Overview
⚫The power supply is shipped from the factory ready for front-panel operation mode. At
power-on, the power supply will automatically enter the front-panel operation mode and
the instrument can be controlled via the front panel keys and knob.
⚫The power supply enters remote mode as soon as a valid remote command is received
via the communication connector in the rear. Switching to remote mode does not impact
the supply’s output parameters. In remote mode, front-panel operation is disabled. Only
Meter and Local buttons are enabled. If the power supply is in remote mode, and the
(Local) key is enabled, you can revert to manual mode by pressing the (Local)
key.
⚫The power supply is in Set mode when it is powered on. In this mode, the VFD will
display the setting voltage and current.
⚫The output of power supply can be enabled/disabled from the front panel by pressing
the
On/Off
button.When turn on the output,the VFD will display the state and
voltage/current of each channel.”CC” represents constant current mode.”CV” represents
constant voltage mode.When output is in OFF mode,VFD will have no any
indicators of CC or CV.
⚫The VFD also displays operation states or error information. “ ”means the power
supply is in remote mode.When front-panel keys are locked, button will be lit.
For more details, please refer to chapter of “Descriptions about VFD marks”
⚫If the power supply is in set mode, you can modify parameters using the knob. If the
power supply is in menu operation, the knob is used for menu selection.
⚫When
V-setV-set
,
I-setI-set
,
Recall
, or
On/Off
buttons are lit,means they are
selected and under corresponding state now.If pressing (Shift)+
Recall
(Save),
Recall
button will keeping flickering and waiting for a number to be entered to specify
the memory location.
⚫When V-SET/I-SET buttons are lit, following conditions will enable the cursor to display
again.
Pressing V-SET/I-SET buttons again
Adjusting the knob
Pressing direction buttons

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Note: If there is any operation on front panel within 5S, the cursor will disappear
automatically. You can also disable the cursor by pressing ESC button. When VFD
displays cursor, you can modify the parameters by adjusting knob or up/down
keys, or move the cursor by right/left keys.
Details about key buttons’ state:
V-setV-set
When button is lit, means you can set voltage.
When button keeps flickering, means in LVP setting mode.
I-setI-set
When button is lit, means in current setting mode.
Recall
When button is lit, means in recall mode
When button keeps flickering, means in save mode and waiting for a number
to be entered to specify the memory location.
When button is lit, means current VFD displays actual voltage and current.
On/Off
When button is lit, means at least one channel output is on. Or all channel s
are in OFF mode.
Note:
V-setV-set
,
I-setI-set
,
Recall
buttons will not be lit at the same time.
3.2 Panel Description
Picture 12
0-9
Numeric keys.Use keys 1~3 to control the output state of the 3
channels which should coordinate with Shift key.Note:In key
lock mode, this function is disabled.
Escape from the current setting or menu item.
(Shift)
Compound key
(Local)
Use to switch to local operation mode
(Power)
Use to power on/off the DC source
V-setV-set
/LVP
Use to set the voltage or shift+V-set to set LVP value

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I-setI-set
/Menu
Use to set the current or shift+I-set to enter the menu
operation.
Recall
/Save
Save or recall different operating parameters in memory
locations
Switch the display between setting value and actual value
Enter
/Lock
Enter button to confirm the selection or setup/Shift+Enter to
lock the front keys
On/Off
Use to control the output state of each channel
Right/Left key, use to move the cursor or scroll through the
menu items
Up/down key, use to increase or decrease the setting value
(Shift)+1, (Shift)+2,
(Shift)+3
Use to turn on the output of corresponding channel no matter
in menu operation or Meter state
3.3 VFD Description
Explanation of enunciators on the display
CC
In constant current mode
CV
In constant voltage mode
open the remote sense
function
Indicates the shift button is
pressed
Indicates the channel
currently selected
SEr
Open serial connection mode
PArA
Open parallel connection
mode
TRA
Enable tracking mode
3.4 Menu Description
Press (Shift)+ (Menu) to indicate operation mode.View the menu on the VFD,and
use the right/left key to change the setup, and up/down key to scroll through the complete
menu items. Press
Enter
to enter the selected menu function.Press
Esc
button to return

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to the previous menu.When the item keeps filickering indicates it is selected currently.
Note: Both pressing Enter and down arrow key can display the next menu. But the difference
between the two methods is as follows: press enter key can save the current setup, while
press up/down key will not change the previous setup.
3.5 Panel Operation
3.5.1 Channel Operation
When
V-setV-set
or
I-setI-set
button is lit, press (Local) key can switch between the three
channels.
3.5.2 OUT ON/OFF
Pressing
On/Off
button toggles the output state of all 3 channes of the power supply.If the
output state is ON,press it,to turn the output state to OFF.While the output state is
OFF,press
On/Off
and the power supply output will turn ON.
To control channels individually,press (Shift)+
1
, (Shift)+
2
, (Shift)+
3
corresponding to each channel. (Shift)+
1
controls the output state of the first channel,
(Shift)+
2
controls the output state of the second channel, (Shift)+
3
controls the
output state of the third channel.
When the power supply is in remote mode,you can set the output state by sending SCPI
command(OUTPut: ON | OFF).The output state operation does not affect any other
parameter.
Note: The
On/Off
key controls the output state of all 3 channels simultaneously.
If you want to control the output state of individual channels,use the number keys 1-3
with shift button.
3.5.3 Set Voltage
Solution 1: press (Local) to select channel, press
V-setV-set
then enter a numerical value
followed by
Enter
.
Solution 2: Press
V-setV-set
,then press to move the cursor position and adjust the
voltage value using the knob. Press
Esc
or
Enter
to exit.

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Solution 3: Press
V-setV-set
,then press to move the cursor position and adjust the
voltage value using . Press
Esc
or
Enter
to exit.
Note: When output in OFF mode and button is dark, rotary knob and up/down
keys cannot be used to adjust voltage and current.
If rotary knobs are enabled, then adjusting it will real-time to change the current
output setup without press
Enter
to confirm.
3.5.4 Current Operation
Solution 1: press (Local) to select channel, press
I-setI-set
then enter a numerical value
followed by
Enter
.
Solution 2: Press
I-setI-set
, then press to move the cursor position and adjust the
current value using the knob.Press
Esc
or
Enter
to exit.
Solution 3: Press
I-setI-set
, then press to move the cursor position and adjust the
current value using . Press
Esc
or
Enter
to exit.
3.5.5 Save and Recall Operation
You can store up to 27 different operating states in memory locations 1 through 27.They are
divided to three groups, each group includes nine different setups. Each operating state
includes a constant voltage value, constant current value, maximum output voltage.
Press (Shift) +
Recall
(Save) followed by a number key to save the current operating
state to non volatile memory.
Press
Recall
+number 1 to 9 to recall operating state assigned to this location.
You can also use the SCPI command (*SAV, *RCL) to save and recall.
When Save operation is done,there will be a corresponding information to indicate the
successful or failed operation.While for Recall operation,only information to indicate failed
recall.
Note: The power supply doesn’t support Save/Recall operation when in serial/parallel
or tracking mode.
If in serial/parallel mode and do Save/Recall operation, the VFD will display INV OPER
(invalid Operation) to remind the user of a wrong operation.
If parameters want to be recalled do not exist, the current value position on VFD will
display -----, and then resume after 2S.

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3.5.6 LVP operation
Press (Local) button to select the channel, press (Shift)+ (LVP),then the voltage
display position of the selected channel will change to display LVP, meanwhile current value
position will keep flickering and waiting for a numerical value to be entered. You can directly
use keyboards or by cursor + knob ways to enter the LVP value. Press Esc can quit the
operation.
After setting a LVP value, user can only set a voltage less than LVP point.
3.5.7 Key Lock Set
Press (Shift) +
Enter
(Lock) can lock the front panel keys, and under lock
condition,
Enter
button will be lit.
In key lock mode, all keys are disabled, except
1
,
2
l,
3
,
On/Off
, ,right/left keys
and (Local) key.
In key lock state, you still can use (Local) and right/left key to select channel.
1
,
2
,
3
(On/Off) can control the output state of corresponding channel without
coordinating with shift button.
3.5.8 Protections
Over Temperature Protection
If the internal temperature of the power supply exceeds 85℃,the instrument will protect
itself by automatically turning power OFF. When this happens you will hear a buzzer and
the display will indicate the following:
OVER HEAT
Picture 13
Over Voltage Protection (OVP)
IT6302 has over voltage protection function at power on.OVP function may be triggered
because of internal error, customer’s wrong operation or too higher external voltage. Once
the power supply is protected, will the user hear a buzzer and output will be turned off,
meanwhile corresponding channel will display OVP in voltage value position and current
value position will display” - - - -”.
OVP value is higher 0.1V than the current max voltage set.
3.6 Menu Description
Press (Shift) +
I-setI-set
(Menu) to enter menu operation.
Out
OFF
Output resumes to OFF mode