I-Tech IT6700 Series User manual

Digital Control Power Supply

User ’s Manual

IT6700

Models IT6720/IT6721

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. IT6700

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.

Compliance Statements

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.

Disposal of Old Electrical & Electronic Equipment (Applicable in the

European Union and other European countries with separate collection

systems)

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.

Safety Symbols

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.

Limitation of Warranty

About IT6700

With widest voltage and current range, IT6700 digital DC power

supplies are applied in many fields.

Take IT6720 for example, with max power 100W and output

adjustable in 60V/5A, auto control voltage/current slew rate, power

rate up to three times rapid than other similar products, a unit can

replace three models (60V*1.6A/ 32V*3A/ 20V*5A), reduce your

repeat investment.

IT6720 output curve

12 3 4 5

Power

100%

When you set the output voltage as 60V,

because the max power of IT6720 is 100W,

so the max output current is 100W/60V=1.6A.

When you change the output voltage to 30V,

the output current is 100W/30V=3.2A.

Calculate according to the above way when

the output voltage is 20V, the output current

should be 5A, but as the max rating current

of IT6720 is 8A, so the final max output

current is 5A.

Example:

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

Memory mode(Shift)

Current setup Indicator

Output +

Output–

Ground

Rotary Encoder

Main Power ON/OFF

Output ON/OFF Button

Voltage Value

Current Value

Step A + Memory A

StepC + MemoryC

StepB + MemoryB

StepD + MemoryD

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

Quick Start

IT672060V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

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 IT6700 comply with the standards of your

country or region.

Note: If switching input voltage, operate through the back panel switch

(110V/220V).

Setting the current

Check out

Press to light up the voltage setup

indicator B. It means IT6700 is in

voltage set mode, shown as fig 1.

Preset voltage

Press light up the voltage

setup indicator . Now the voltage

will rise/decline 1V once you rotary

the knob . Set the voltage to 12V.

Step indicator B

Press to light up the current setup

indicatorA. IT6700 is in current set

mode, shown as fig 1.

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.

IT6720 60V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

Preset current indicator

Step indicator A

Enable output

IT672060V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

Output off indicator

Press to enable the IT6700 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

Power off lights will be turned off which

means the power is in output state.

Press again, you will shut power

supply’s output.

After the check of the above matters,

power on by press

Setting the voltage

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

Step value for Cursor Position

Cursor position Step voltage Step current

------

0.1V

0.01V

0.1A

0.01A

0.001A

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.

IT672060V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

Press , and press for

three seconds, now the panel

displays OVP, shown as fig 4.

ShiftShift

DV/A

Use and to set OVP

value.

OVP voltage value

IT672060V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

OCP current value

Press to enter into OCP

setting interface after setting OVP

value, use and to

set the OCP value.

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 IT6720 are

OVP=61V, OCP=5.1A;IT6721 OVP=61V,

OCP=8.1A.

NOTE

Store group setting (GRP)

IT672060V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

Press to enter into GRP interface

after setting the OCP value, use

and to select store group.

IT6700 allows customers to store 100

groups with A/B/C/D four set value for every

group.

Press to confirm the chosen

group and end the setup mode.

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.

IT6720 60V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

Power address (ADD)

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。

IT6720 60V/5A/100W

Auto Range DC Power Supply CV CC

OVP OCP

OFF Shift

Lock Prog

ITECH

A B C D

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

Faulty disposal

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.CC

Press and , the indicator will be lit on, which means that

IT6720working in the shortcuts mode. Press any key in ,

recall the preset voltage/current value which has been stored.

Recall 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.

Store operation

ShiftShift

A B C D

DV/A

ShiftShift

Prog

DV/A

ShiftShift

Battery charging protection

Pay attention to the positive and negative terminals when connecting the

battery. If the battery is connected reversely to the power supply, it will

result in damage to the power supply.

When using the power supply to charge the battery, a diode and a fuse must be

connectedin series with the output as shown in the following figure to protect the

circuit . The detailed methodology is shown as follows.

The role of the diode and the fuse in the above figure is described as below.

The role of the diode is to block any reverse voltage and current flow to the

battery to protect the power supply and prevent the internal parts from damage.

The series diode can also avoid the condition that the battery discharges due

to the internal resistive load of the power supply in the power-off or output-off

state.

When selecting the diode, the user should consider the following notes.

The current capacity of the diode should be 110% of the rating current of the

battery at least. When setting the input voltage of the battery, the user need to

consider the threshold voltage of the diode. The typical threshold voltage of a

silicon diode is 0.6 V to 0.7 V. The reverse breakdown voltage of the diode

should be more than twice the rating voltage of the battery. The user also need

to consider the power of the diode and add a heat sink when necessary

The role of the fuse is to interrupt the current by melting the metal wire in it

when the current rises to a certain value, thereby protecting the circuit.

When selecting the fuse, the user should consider the following notes. The

rating current of the fuse should be 150% to 200% of the maximum current of

the battery and be less than 150% of the maximum output current of the power

supply.

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