I-Tech IT7300 Series User manual

IT7300 User Manual
User Manual
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USER MANUAL
Programmable AC Power Supply
IT7300 Series
Model IT7321/IT7322 /IT7324/IT7326/IT7322H/IT7324H
©Copyright All Rights Reserved
Ver1.3/Dec, 2013/ IT7320

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IT7320 Series Programmable AC Power Supplies...........................................................3
Security................................................................................................................................3
Security regulation .............................................................................................................3
Safety symbols....................................................................................................................3
Certification and Quality Assurance .................................................................................3
Introduction ...........................................................................................................................5
Chapter1 Inspection and Installation.....................................................................................6
1.1 Inspection.................................................................................................................................................... 6
1.2 Dimension ................................................................................................................................................... 7
Chapter2 Quick start ........................................................................................................... 11
2.1 Front and Rear Panel.............................................................................................................................. 11
2.2 Front-panel Operation Overview............................................................................................................ 14
2.3 VFD Indicator Description....................................................................................................................... 15
Chapter3 Power on check...................................................................................................16
3.1 power on checkout................................................................................................................................... 16
3.1.1 Power on the supply..................................................................................................................... 16
3.1.2 System self-test............................................................................................................................. 17
3.2 Output Checkout ...................................................................................................................................... 18
Chapter4 Technical specification.........................................................................................19
4.1 Specification.............................................................................................................................................. 19
4.2 Supplementary parameters .................................................................................................................... 25
Chapter5 Basic Operation...................................................................................................26
5.1 Local/Remote Mode ................................................................................................................................ 26
5.2 Voltage Setup ........................................................................................................................................... 26
5.3 Frequency Setup...................................................................................................................................... 27
5.4 Phase Angle Setup .................................................................................................................................. 27
5.5 Output On/Off Operation......................................................................................................................... 27
5.6 Switch the VFD display items................................................................................................................. 28
5.7 Save and recall operation....................................................................................................................... 28
5.8 Trigger operation ...................................................................................................................................... 29
5.9 Menu Operation........................................................................................................................................ 29
5.9.1 Menu description .......................................................................................................................... 29
5.9.2 Menu function................................................................................................................................ 31
5.10 Function operation................................................................................................................................. 33
5.10.1 Sweep .......................................................................................................................................... 33
5.10.2 List operation(List )..................................................................................................................... 35
5.10.3 Dimmer...................................................................................................................................... 38
5.11 Output range........................................................................................................................................... 39
5.12 Key lock................................................................................................................................................... 39
5.13 BNC ......................................................................................................................................................... 39
5.14.3-phase setup
Chapter6 Remote Operation Mode ............................................................................................ 43
6.1 RS232 interface........................................................................................................................................ 43
6.2 USB interface............................................................................................................................................ 44
6.3 LAN interface ............................................................................................................................................ 45
6.4 GPIB interface .......................................................................................................................................... 45

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IT7320 Series Programmable AC Source
Security
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 operator can maintenance. If maintenance service is required,
please contact a trained service personnel.
Security regulation
To prevent electric shock, 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 cannot 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 for ever.
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
IT7320 series programmable AC power supply fully meet all of the technical specification in
the manual.
Warranty
Our Company gives one year warranty for the materials and manufacturing of the product
since the date of shipment.

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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 contents of this manual is subject to change, we will not notice additionally

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Introduction
IT7320 series sets up the new standard for high performance AC power source.It equips
with all powerful features such as power line disturbance (PLD) simulation, Dimmer and
comprehensive measurement functions.With a compact and standard size of 2U.IT7320
series has built-in LAN/RS232/USB/GPIB communication interface (except IT7321, IT7321
is equipped with LAN/RS232/USB communication interface).These features make the
IT7320 series ideal for commercial,power electronics and military test applications from
bench-top testing to mass production.
Features:
High accuracy and resolution
Compact and standard size (300VA @ 2U)
Programmable frequency:45HZ-500HZ
Display Vrms,Irms,Ipeak,frequency,PF,apparent power and active power simultaneously
IEC61000-4-11,IEC 61000-4-14,IEC 61000-4-28 voltage dips and frequency variation
simulation
Power line disturbance simulation capability
Programmable voltage and current limit settings
Dimmer function
Turn on,turn off phase angle control(0-360°)
TTL signal which indicates output transient
Support front and rear panel output
List mode to generate surge,sag and other line disturbance simulations
Over-voltage,over-power,over-current,over-temperature protection features
Built-in LAN,RS-232, GPIB and USB interface programming with SCPI command
language.（IT7321 has no GPIB interface）
Memory capacity:10 groups
Mode Voltage Current Power
IT7321 300V 3A 300VA
IT7322 300V 6A 750VA
IT7322H 500V 3A 750VA
IT7324 300V 12A 1500VA
IT7324H 500V 6A 1500VA
IT7326 300V 24A 3000VA

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Chapter1 Inspection and Installation
Power supply is a kind of high level safety equipment with a protected ground terminal.
Before Installation or operation, please read the safety signs and instructions in this manual
1.1 Inspection
After receive the power supply, follow these steps to check:
1. Damage
When you receive your AC source,inspect it for any obvious damage that may have
occurred during shipment.If there is damage,notify the shipping carrier and the nearest
ITECH Sales and Support Office immediately.
2.Accessories
Make sure you receive the AC source and the following accessories at the same time, if any
is missing, please contact your nearest support office.
□a power cord (a power cord appropriate for your location)
□CD included User’s manual and protocol
□a factory calibration report
□a USB cable
3. AC input
There are two kinds of mains input of IT7320 (110Vac and 220Vac).
AC input level
110VAC ± 10%, 47 to 63 Hz
220VAC ± 10%, 47 to 63 Hz
Power cord type
E
NL
E
LN
E
NL
E
LN
China America,Canada Europe England
IT-E171 IT-E172 IT-E173 IT-E174

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1.2 Dimension
1. IT7321 power supply’s dimension:
214.5mmW×88.2mmH×453.5 mmD (W:width H:height D:depth)
* refer to the Dimension below:
Unit：millimeter

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2. IT7322/IT7322H/IT7324/IT7324H power supply’s dimension:
439mmW×131.4mmH×535.7 mmD (W:width H:height D:depth)
* refer to the Dimension below:
Unit：millimeter

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3. IT7326 power supply’s dimension:
437mmW×267mmH×608.30mmD (W:width H:height D:depth)
* refer to the Dimension below:

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Unit:millimeter(mm)

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Chapter2 Quick start
This chapter introduces the front panel, the rear panel, key functions and VFD display of the
AC source.Make sure that you can quickly know the appearance, instruction and the key
function before you operate the power supply, Help you make better use of IT7320 series.
2.1 Front and Rear Panel
The front panel of IT7321
①②
③④ ⑤ ⑥ ⑦
The front panel of IT7322/IT7322H/IT7324
VFD display
①
②Rotary knob
③Compound key, the local
switch key and power switch
④Numeric keys and ESC
⑤Function keys
⑥UP, DOWN, LEFT and RIGHT
key
⑦Output terminals
⑧Power button

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The front panel of IT7326
VFD display
①
②Rotary knob
③Power button
④Compound key, the local switch key and power switch
⑤Numeric keys and ESC
⑥Function keys
⑦UP, DOWN, LEFT and RIGHT key
⑧Output terminals
The rear panel of IT7321
①②③ ④ ⑤
⑥
⑦

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The rear panel of IT7322/IT7322H/IT7324/IT7324H
The rear panel of IT7326
①LAN communication interface
②RS232 communication interface
③USB communication interface
④Cooling fans
⑤AC power socket
⑥Output terminals
⑦BNC terminal
⑧GPIB communication interface
⑨System Bus
⑩Fuses

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2.2 Front-panel Operation Overview
Key description, see the table below：
Keys Name and the function
Shift The shift key is used to select the alternate operation of a
key,indicated by the word under the key
Local Local buton, switch from remote mode to local operation mode
Power Power on key
0-9 Numeric keys
/Sweep Number 7/Sweep function key
8
/List Number 8/List function key
9
/*Dimmer Number 9/Dimmer function key
Escape key.It can be used to exit keyboard entry or move up a level
in the menu.
/High/Auto Set the voltage value/ Switch the voltage range between high range
and Auto range mode
/Phase Set the frequency /set the phase angle
Recall
/Save Recall the setup from internal memory/ Store the AC source
settings in non-volatile memory.
/Menu Switch the VFD display to be apparent power,peak current,active
power and power factor/entry the menu setup
EnterEnter
/Trigger Enter key, to confirm the number entered and operation/trigger
button, which is used to trigger the List test
On/Off
/Lock Output on (off) keys, control power output state / keypad lock
function keys, used to lock the panel buttons
Left and right direction keys, used to set the value, to adjust the
cursor to the specified location
Up and down keys, used to turnover the item in the menu or
increase (decrease) the output voltage or current values

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2.3 VFD Indicator Description
VFD indicator function description as follow:
Char Function description Char Function description
OFF Output is off Prot OVP/OTP/OCP/OPP
Protection
Rmt The AC source is in remote
mode Auto Auto change the voltage range
SRQ Service request * Dimmer function is enabled
Error The power supply has an error Shift Shift button is pressed
Trig Awaiting for a trigger signal Lock Key operation is locked

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Chapter3 Power on check
This chapter will introduce the procedure of power on check, including pre-check and output
check, to make sure the IT7320 series AC source can power on and work normally on the
original state.
3.1 power on checkout
Before operate the AC source, please read the following safety guide:
Warning：The power supply is shipped from the factory with a power-line cord
that has a plug appropriate for your location. Your power supply is
equipped with a 3-wire grounding type power cord; the third conductor
being the ground. The power supply is grounded only when the
power-line cord is plugged into an appropriate receptacle.
Warning：Use wire with appropriately rated load capacity of all load wires must
be able to withstand the maximum short-circuit output current of the
power without overheating. If there is more than one load, each load wire
must be able to safely carry the power of full rated short-circuit output
current.
Warning：In order to reduce the risk of fire and electric shock, make sure that the
mains supply voltage fluctuations should not exceed 10% of the operating
voltage range.
Note: In some cases, misconfigurated mains voltage for the instrument may cause
the mains fuse disconnected.
Power on pre-check includes two parts: power on check and system self check.
3.1.1 Power on the supply
Use the following steps to help solve problems you might encounter when turn on the
instrument.
1) Verify a good condition of Mains supply connection
First, verify that the power cord is firmly plugged into the power receptacle on the rear
panel of the AC source. You should also make sure that the power source you plugged the
AC source into is energized. Then, verify that the power supply is turned on.
2) Verify the power-line voltage setting.
The line voltage is set to the proper value for your country (220VAC or 110VAC) when
the power supply is shipped from the factory.
IT7321/IT7322/IT7322H/IT7324/IT7324H models support 110V/220V AC input.The AC
line switch is located at the buttom of the unit.Please pay attention to the AC level setup
before provide AC power.
IT7326 only support 220V AC input.

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3) Verify that the correct power-line fuse is installed.
If the fuse was damaged, please replace the fuse with same specification for your
power supply.
4) How to exchange the fuse
Remove the AC power cord and open the plastic cover located at the AC power
inlet,then you will see the fuse.
Replace with a fuse of the same specification and install it.
3.1.2 System self-test
After power on,the VFD will display the BIOS version:
After 1s,it will change to display as below:
If the EEPROM was damaged or the latest operation data in EEPROM was lost, the VFD
will display with a indicator light of “Error”.Access the menu could check the detailed error
information.If everything goes well,VFD will display:
System Selftest…..
BIOS VER1.10

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Note:Under the screen of displaying “ITECH IT7321”,press On/Off button will quit the
and entry the normal working screen.Or it will automatically done the same operation
after 7s without any operation.
3.2 Output Checkout
The following procedures check to ensure that the AC source develops its rated outputs and
properly responds to operation from the front panel.
The following steps verify basic voltage functions without load.
1) Turn on the AC source.
2) Press and numeric key to set a effective voltage,press
EnterEnter
to confirm
3) Press and numeric key to set the frequency，press
EnterEnter
to confirm.
4) Press
On/Off
to turn on the output
Note:When
On/Off
button is lit which means the output is ON,Meanwhile indicator
light of “OFF” on VFD will disappear.
5）check the output waveform with a oscilloscope
set different voltage and check wether the disiplayed voltage is close to setting
voltage.
6）Ensure that the voltage can be adjusted from zero to the full rated value
OFF
200.0V 0.0mA 60.0
0.00W PF=0.000 0.0S
power
power factor output time
Output state
effective
voltage Current Frequency

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Chapter4 Technical specification
This chapter will introduce the main technical parameters of IT7300,such as rated
voltage/current/power and so on. Besides, this part will introduce the working environment
and storage temperature.
4.1 Specification
Model IT7321
AC INPUT
Input
Phase 1
Voltage 220Vac/110Vac±10%
Frequency 47-63Hz
Max.Current 6.3A（220Vac）or 10A(110Vac)
Power Factor 0.5(typical)
AC OUTPUT
AC output
Max.Power 300VA
Max Current(rms) 3.0A(0-150V) 1.5A(0-300V)
Max Current(peak) 12A (0-150V) 6A(0-300V)
Phase 1Φ/3W
Total H a rmo n ic
Distortion(T.H.D) ≤0.5% at 45-500Hz (Resistive Load)
Crest Factor ≤4
Line Regulation 0.1% max for a ±10% line change
Load Regulation ≤0.5%FS (Resistive Load)
Response Time <100uS
SETTING
Voltage
Range 0-300V, 150/300V Auto
Resolution 0.1V
Accuracy ±(0.2% +0.6V)
Frequency
Range 45-500Hz
Resolution 0.1Hz at 45-99.9Hz
1Hz at 100-500Hz
Accuracy 0.1HZ
Phase Angle
Range 0-360°
Resolution 0.1°
Accuracy ±1°(45-65Hz)
READBACK
Voltage
Range 0-300V
Resolution 0.1V
Accuracy ±(0.2% + 0.6V)
Current(rms)
Range L:120.0mA/ M:1.200A/ H:3.00A *
Resolution L:0.1mA/ M:1mA/ H:10mA
Accuracy L: ±(0.2%+0.6 mA)/ M: ±(0.2%+6mA)/ H: ±(0.2%+40mA)
Current(peak)
Range 0-12A
Resolution 0.01A
Accuracy ±(1% + 360mA)

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Power
Resolution L:0.01W/ M:0.1W/ H:1W
Accuracy L: ±(0.2%+0.05W) (47HZ-65HZ)/ M: ±(0.2%+0.5W) (47HZ-65HZ)
/H: ±(0.2%+2W) (47HZ-65HZ)
OTHER SPECIFICATION
Memory 10 memories
Sync Output Signal Output Signal 5V, BNC type
Interface LAN, USB, RS232
Operation Environment 0-40 /20℃-80%RH
Dimension 214.5mmW×88.2mmH×453.5mmD
Weight 9.5kg
Model IT7322
AC INPUT
Input
Phase 1
Voltage 220Vac/110ac±10%
Frequency 47-63Hz
Max.Current 15A(220Vac) or 30A(110Vac)
Power Factor 0.7(typical)
AC OUTPUT
AC output
Max.Power 750VA
Max Current(rms) 6A(0-150V) 3A(0-300V)
Max Current(peak) 24A (0-150V) 12A(0-300V)
Phase 1Φ/3W
Total H a rmo n ic
Distortion(T.H.D) ≤0.5% at 45-500Hz (Resistive Load)
Crest Factor ≤4
Line Regulation 0.1% max for a ±10% line change
Load Regulation ≤0.5%FS (Resistive Load)
Response Time <100uS
SETTING
Voltage
Range 0-300V, 150/300V Auto
Resolution 0.1V
Accuracy ±(0.2% +0.6V)
Frequency
Range 45-500Hz
Resolution 0.1Hz at 45-99.9Hz
1Hz at 100-500Hz
Accuracy 0.1HZ
Phase Angle
Range 0-360°
Resolution 0.1°
Accuracy ±1°(45-65Hz)
READBACK
Voltage
Range 0-300V
Resolution 0.1V
Accuracy ±(0.2% + 0.6V)
Current(rms)
Range L:120.0mA/ M:1.200A/ H:6.00A *
Resolution L:0.1mA/ M:1mA/ H:10mA
Accuracy L: ±(0.2%+0.6mA)/ M: ±(0.2%+6mA)/ H: ±(0.2%+60mA)
Current(peak) Range 0-24A