I-Tech IT6721 User manual

Digital Control Power Supply
IT6721
User ’s Manual
ITECH
Access www.itechate.com for more products information

Safety Regulations
To avoid electrical shock, do not open the cabinet. Refer servicing
to qualified personnel only.
To avoid injuries, always disconnect power, discharge circuits,
and remove external voltage sources before touching components.
KEEP AWAY FROM LIVE CIRCUITS.
We cannot accept responsibility for any direct or indirect financial
damage or loss of profit that might occur when using the power
supply.
The instrument chassis and cover must be connected to an
electrical ground.
WARNING
We certify that this product met its published specifications at
time of shipment from the factory.
Certification
Notice The information contained in this document is subject to change
without notice.
Warranty
This hardware product is warranted against defects in material and
workmanship for a period of ONE year from date of delivery. IT6721
power supply for use with a hardware product and when properly
installed on that hardware product, are warranted not to fail to
execute their programming instructions due to defects in material
and workmanship for a period of 90 days from date of delivery.
During the warranty period our company will either repair or replace
products which prove to be defective. Our company does not
warranty that the operation for the software firmware or hardware
shall be uninterrupted or error free. For warranty service, with the
exception of warranty options, this product must be returned to a
service facility designated by our company. Customer shall prepay
shipping charges by (and shall pay all duty and taxes) for products
returned to our place for warranty service. Our company shall pay
for return of products to Customer.

Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper
or inadequate maintenance by the customer, customer-supplied software or
interfacing, unauthorized
modification or misuse, operation outside of the environmental
specifications for the product, or improper site preparation and
maintenance.
Compliance Statements
Disposal of Old Electrical & Electronic Equipment (Applicable in the
European Union and other European countries with separate collection
systems)
The ITECH product you have purchased is subject to Directive
2002/96/EC of the European Parliament and the Council of the
European Union on waste electrical and electronic equipment
(WEEE) and, in jurisdictions adopting that Directive, is marked
as being put on the market after August 13, 2005, and should not
be disposed of as unsorted municipal waste. Please utilize your
local WEEE collection facilities in the disposition of this product
and otherwise observe all applicable requirements.
Safety Symbols
Connect it to safety earth ground using the wire recommended in
the user’s manual.
High voltage danger
The symbol on an instrument indicates that the user should refer
to the operating
instructions located in the manual.

About IT6721
With widest voltage and current range, IT6721 digital DC power
supplies are applied in many fields.
With max power 180W and adjustable output in 60V/8A, auto control
the voltage/current slew rate, the power rate three times rapid than
other similar products, a unit can replace three models (60V*3A/
30V*6A/ 20V*8A), reduce your repeat investment.
IT6721 output curve
When you set the output voltage as 60V,
because the max power of IT6721 is 180W,
so the max output current is 180W/60V=3A.
When you change the output voltage to 30V,
the output current is 180W/30V=6A.
Calculate according to above means: when
the output voltage is 20V, the output current
should be 9A, but because the rating max
current of IT6721 is 8A, so the final output
current value is 8A.
Example:
02468
20
40
60
I
V
Power
100%
Function
Fully digital control
High resolution 10mV/1mA in Full range
Low ripple and noise
Software calibration
Bright and easy to read display (VFD)
Constant current and constant voltage output
Selectable remote control keypads
High reliability OVP/OCP/OTP protection
Output on/off control
Best performance /price ratio
Storage for 4*100 preset voltage and current output

Panel Layout
Voltage / Current Selector + Memory D Button
Output +
Output –
Ground
Rotary Encoder
Main Power ON/OFF
Output ON/OFF Button
Voltage Value
Current Value
Step A + Memory A
Step C + Memory C
Step B + Memory B
Step D + Memory D
Output OFF Indicator
Shift Indicator
Keyboard Lock Indicator
Memory mode Indicator
OVP Indicator
OCP Indicator
CV mode Indicator
CC mode Indicator
Voltage setup Indicator
Left arrow + Memory A Button Right arrow + Memory B Button
Enter + Memory C Button
Shift Button
Setup Display (Shift)
Function Setup (Shift)
Keyboard (Shift)
Memory save (Shift)
Air flow input
IT6721 60V/8A/180W
Auto Range DC Power Supply

Quick Start
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Confirm whether the power supply has been destroyed in transportation, if there is
any flaw, please contact the vender.
Confirm whether the AC input voltage of IT6721 comply with the standards of your
country or region.
Note: If switching input voltage, operate through the back panel switch
(110V/220V).
Check out
Press to light up the voltage setup
indicator B. It means IT6721 is in
voltage set mode, shown as fig 1.
Preset voltage
Press to light up the voltage
setup indicator . Now the voltage
will rise/decline 1V once you rotary
the knob . Set the voltage to 12V.
AA
BB
Step indicator B
After the check of the above matters,
power on by pressing
Setting the voltage
B
Setting the current
Press to light up the current setup
indicator A. IT6721 is in current set
mode, shown as fig 2.
DV/A DV/A
Press to adjust the setup
indicator to . Now the current will
rise/decline 1V once you rotary the
knob . Set the current to 4A.
AA
BB
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Preset current indicator
Step indicator A
Enable output
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Output off indicator
Press to enable the IT6721 output.
Voltage and current settings will be wink
for three seconds，and after that , the
display value of numerical display will
change from the set value to actual
measured voltage and current value.
On/OffOn/Off
On/OffOn/Off
Power off lights will be turned off which
means the power is in output state.
Press again, you will shut power
supply’s output.

Step value for Cursor Position
A
B
C
D
Cursor position Step voltage Step current
------
1V
0.1V
0.01V
1A
0.1A
0.01A
0.001A
The power supply usually displays the actual voltage and current values.
When you want to check the preset voltage and current values, the unit will
display automatically settings, press twice, the settings will be
displayed for three seconds.
Check the set voltage and current value
Key lock function
OVP function
OCP function
This function can prevent error operation by unauthorized person.
Press , after the was lit on, press ,
will be lit on, which means all keys on the panel except
and . Repeat above operation, key lock function will be
disabled.
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Press , and press for
three seconds, now the panel
displays OVP, shown as fig 4.
ShiftShift DV/A DV/A
Use and to set OVP
value.
AA
BB
OVP voltage value
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
OCP current value
Press to enter into OCP
setting interface after setting OVP
value, use and to
set the OCP value.
CC
AA
BB
If the OVP and OCP settings are lower
than the actual voltage/current value,
the output of power supply will be
turned off. The default settings of
IT6721 are OVP=61V, OCP=5.1A.
NOTE

Key sound (BEEP)
Press to enter the BEEP setting
Interface after finished the OCP setting,
select the ON/OFF state with the knob .
ON indicates there is key sound,
OFF means no.
CC
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Power address (ADD)
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Press to enter the ADD setting
interface after finishing the BEEP
setting, select the and
to enter store address setting. ADD
range: 0~30，press to confirm。
CC
AA
BB
CC
Store group setting (GRP)
V
A
IT6721 60V/8A/180W
Auto Range DC Power Supply CV CC
OVP OCP
OFF Shift
Lock Prog
ITECH
ABCD
Press to enter the GRP interface
after setting the key sound, use
and to select store group.
Press to confirm the chosen group
and end the setup mode. IT6721 allows
customers to store 100 groups with
A/B/C/D four set value for
every group.
CC
AA
BB
CC

Store operation
In the normal working mode, set the voltage/current value to be stored.
Press and , now the Cursor will wink together. Press
any key in to save it.
ShiftShift
ABCD
AA
CC
BB
DV/A DV/A
AA
Recall operation
Press and , the indicator will be lit on, which means that
IT6721working in the shortcuts mode. Press any key in ,
recall the preset voltage/current value which has been stored.
ShiftShift
BB
Prog
AA
CC
BB
DV/A DV/A
When the power supply is on recall operation, that means all you can recall the
parameters from the store group. Press any key of to
recall the stored parameter.
When the power supply is on recall operation are disabled,
they only can be used with key. Press , and press to exit recall
function.
AA
CC
BB
DV/A DV/A
ShiftShift
BB
ShiftShift
Faulty disposal
3: Check whether the indicators are lit on, if so, please reset
according to the mentioned OVP/OCP/OCP means.
If the outputs is disabled:
1: Check whether voltage and current settings are zero, if so, reset voltage
and current value.
2: Check whether the indicator is lit on, if so, press to enable the
outputs. OFF
OVP OCP
If the keypad is disabled, check whether the indicator is lit on, if
so, unlock the keypads as the above means. Lock
On/OffOn/Off

6: Specifications
Output Rating Voltage
Current
Specifications IT6721
Load Regulation Voltage
Current
Line Regulation Voltage
Current
0~60V
<0.01%+5mV
<0.01%+5mA
<0.01%+5mV
<0.1%+5mA
0~8A
Specs
Power 180W
Programming Accuracy Voltage
Current <0.05%+10mV
<0.3%+5mA
Read back Accuracy Voltage
Current
Ripple Current
Voltage
<0.05%+10mV
<0.3%+5mA
<5mV rms
<8mA rms
Dimension 88*175*282(mm)
W*H*D
Weight Net <3.5Kg

Memo
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Rights Reserved
Ver1.0 /MAR 2008/ IT6721
ITECH