UNI-T UAP500A Programmable AC Power Source User Manual

UNI-T UAP500A Programmable AC Power Source

Product Overview

Thank you for purchasing UNI-T programmable variable frequency AC power supply, this section includes the following contents:

Product Serie
This serie has two models， UAP500A（500VA）and UAP1000A（1000VA）.
UAP500A/1000A is AC power supply, it can measure the low distortion sine wave output and the accuracy of power supply; It has advanced direct digital synthesizer (DDS) waveform generation technology and Sinusoidal Pulse Width Modulation (SPWM) technology with high-frequency stability and good continuity; Front panel has rotary knob and keypad to control and set the current and frequency; LCD is for full operating states; It can remote programming by RS-232C communication interface.

Characteristics

• Output constant voltage and continuously adjustable
• Over current/temperature/load and short circuit protection
• Advanced direct digital synthesizer (DDS) waveform generation technology with high-frequency stability and good continuity
• Build-in intelligent PC monitoring system All range adjustable output voltage 0-150V/0-300V，step：0.01V；
• Output frequency 45-250Hz，step：0.01Hz;
• Remote control by RS-232C communication interface
• Provide reading of voltage, active power, frequency, and power factor
• Press the keypad to input parameters of voltage, frequency, cut-off current, high accuracy
• 9 sets of voltage, current, and frequency can be adjusted freely
• One key to switch high-low voltage output
• Input delay can be set as user’s custom

Front Panel

Table 1.2.1 Introduction of Front Panel

Rear Panel

Table 1-3-1 Rear Panel

No.

|

Name

|

Description

---|---|---

1

|

RS232 interface

|

External communication interface to realize remote control the power

2

|

Fuse

|

Output terminal fuse, 250V/10A

3

|

Fuse

|

Input terminal fuse, 250V/10A

4

|

Power socket

|

AC power input socket

5

|

Output

|

Power output terminal, multifunction socket

6

|

Ventilation hole

|

For dissipating heat

7

|

SYNC

|

SYNC will send pulse signal synchronously when output changes

8

|

Ground terminal

|

For ground connecting

Safety Information

Caution ： To avoid possible electric shock and personal safety problems, please follow the instructions below.

Disclaimer

| Please read the following safety information carefully before starting to use the instrument. Uni-Trend will not be responsible for the personal safety and property damage caused by the user’s failure to comply with the following terms.
---|---
Instrument Grounding| To prevent the risk of electric shock, please use the cable provided by the factory to connect the instrument and power the ground wire.
Operating voltage| Please make sure the operating voltage is under rated range of 10%, to avoid damage the instrument.

Input voltage

| Read all the marks on the instrument before connecting. The instrument provides 220V two kinds of AC input modes, check whether the conversion switch of the variable frequency power supply matches with input power and ensure that the fuse is installed in place. Otherwise, the variable frequency AC power supply may be damaged.
Do Not

use the instrument in an explosive atmosphere

| Do not use the instrument in flammable and explosive gas, steam or dusty environment.

The use of any electronic equipment in such an environment is a risk to personal safety.

Do Not

open the cover

| Please do not open the instrument case, non-professional maintenance personnel

should not open the instrument cover to repair the instrument. There is still an undischarged charge in a period of time after the instrument has been turned off, which may pose a risk of electric shock to persons.

Do Not

use abnormal instrument

| When the instrument is in operation, do not touch the bare connect wire, spare input terminal and the circuit is in testing. When the instrument is over DC 60V or AC 30V, be careful with an electric shock.
Do Not

use the instrument in an explosive atmosphere

| If the instrument is not working properly and its danger is unpredictable, please disconnect the power cord and do not use it again or try to repair it by yourself.
Do Not

use the instrument over this manual

| If use the instrument over this manual, the protective measures will be out of

effect.

It is strictly prohibited to use this instrument in life support system or any other equipment with safety requirements.

---|---
Do Not

replace or perform unauthorized modification

| To make sure the security of the programmable variable frequency AC power supply, please do not replace the components or perform any other unauthorized modifications.

Do not use the instrument if the cover has been removed or loosened, it may cause a hazard.

Safety Mark

Inspection and Installment

Packing List

Befor using the instrument：

1. Check whether the appearance of the product is damaged, scratched or has other defects.
2. Check whether the instrument accessories are missing according to the packing list.
   If it is damaged or the accessories are missing, please contact Uni-Trend Instrument Sales Department or the distributor immediately.

1

| UAP500A/UAP1000A，the model is subject to the actual order.
Power Line| 1|
RS232 communication Line| 1|
Back-up Fuse| 2| 250V/10A，input and output terminal fuse
User’s Manual| 1| Electronical copy, it can download from UNI-T’s official website

Power Requirements
UAP500A/1000A can only be used in following conditions：

Fuse

| Input voltage：250V/10A Output voltage：250V/10A

• The three-core power cord is provided. Please make sure that the ground wire of the three-phase socket is properly grounded before use.
• 250V/10A fuse is selected and installed for the instrument.
• The instrument with two spare fuses.
• When replacing the fuse, please remove the external power cord first, then open the fuse slot under the power interface, take out the old fuse and replace it with a new one, and install the fuse slot back after completion.

Operating Environment
UAP500A/1000A variable AC power supply only can used in normal temperatures and non-condensing environments. The following is the environmental requirements for the general environment
Ventilation fans speed will intelligently change with the temperature of the cooling fin.
The installment place should not have gases, vapors, chemical deposits, dust, dirt and other explosive and corrosive media that may seriously affect the instrument.
The installment place should be free of serious vibration or bumps.

Cleaning
To avoid electric shock, please unplug the power cord before cleaning.
Clean the housing and the panel with a soft damp cloth, and make sure it is completely dry. Do not clean the interior of the instrument.
Caution：Do not use solvent (alcohol or gas) to clean the interior of the instrument.
Do not stick the ventilation holes, and clean the outer shell regularly to make sure the instrument can work stably.

Packing
Original Packing
Please keep all the original packing materials to pack the instrument, if the instrument need to send back to factory for maintenance. And please contact with UNI-T technical support before sending it. Make sure all the accessories, such as power cord is sent back and mark the failure phenomenon and reasons. In addition, please indicate “fragile”, and “please be careful when handling it” in the package.

Other Packing
If the original packing materials are missing, please pack the instrument as follows,

1. Use bubble bag or EPE foam to wrap the instrument
2. Put the instrument in a multilayer cardboard box which can stand 150kg of pressure
3. The instrument must be around with shockproof materials, a thickness about 70 -100mm
4. Seal the cardboard box properly
5. Indicate “fragile”, and “please be careful when handling it” in the package.

Measurement Display

Power On
Turn on the variable AC power supply properly and inspect it as follows,

1. Connect the power cable correctly, press the power button on the front panel to active the instrument. Press On/Off, Caution, High/Low key, screen will display “INIT” and a self-test progress bar.
2. After initialization, the screen will display the current state.
   The completion of the correct power-on self-test indicates that the instrument meets the factory standards and it can be used normally by the user.
   Caution： Before operating the variable AC power supply, please read safety information carefully.
   Warning： Please make sure the power voltage is matched with the supply voltage, otherwise it may cause damage to the instrument.
   Please make sure the mian power plug is inserted into the protective ground power socket, do not use a patch panel without a protective ground.

Introduction of Screen Display
Enter measuring mode, VA screen will display as follows,

Operating Indicator
UAP500A/1000A variable AC power supply has On/Off key with output indicator. Press On/Off key, the indicator becomes green which means output is enabled; press On/Off key again to disable the output and the indicator will also be off.
High/Low key with indicator. Press High/Low key, the indicator becomes blue which means in high mode; press High/Low key again to switch high to low mode and the indicator will be off; 0-150V is low mode, and 150V-300V is high mode. Press the High/Low key to switch low to high mode, and the indicator should be blue before setup.

Measurement Setup

This section is to introduce the main function of the variable frequency AC power, for user to learn more about how to operate the instrument.

Parameter Setup

Output Voltage
Press【rotary knob】or【V Set】, voltage value start to blink and then to enter voltage setup；
Press the right and left direction key to select the required and specific digit;
Rotate【rotary knob】to set the required voltage value, press【OK】or【rotary knob】to confirm the voltage setting.
Note：0-150V is low level, 150V-300V is high level. When the setting is low level, press the High/Low key to switch low to high level, and the indicator should be blue and then set voltage value of high level.

Protective Current
Press【rotary knob】or【V Set】， current value start to blink, press low direction to enter the current setup; press right and left direction key to select the required and specific digit;
Rotate【rotary knob】to set the required current value, press【OK】or【rotary knob】to confirm the voltage setting.
Note：In output mode, when the tested current exceeds the protective current, power will decrease voltage output till output is disabled.

Output Frequency
Press【F Set】， frequency value start to blink and then to enter frequency setup;
Press right and left direction key to select the required and specific digit;
Rotate【rotary knob】to set the required voltage value, press【OK】or【rotary knob】to confirm the voltage setting.
In addition, press【50Hz】or【60Hz】button can set the frequency to 50Hz or 60Hz directly.

Output
Set setting the above parameters, connect the load, press【On/Off】key, the indicator becomes green, press 【On/Off】key again, turn off output and the indicator will also be off.

Mode Selection
Press【Mode】， use up/down direction key to select the required mode, and press【OK】to use the parameter of the current mode.

Mode Setup

Parameter of Mode
Press【Mode】key as shown in the figure below, M1 appears on the screen, select the mode which need to set the parameters M1-M9 by using the up/down direction key; Take M1 as an example, long press【Mode】key till the voltage value and M1 start to blink to enter the setting mode, it can set the output voltage and frequency, protective current as 4.1 parameter setup, press【OK】 or【rotary knob】to keep the setting.
Note：If there are three parameters should be set, do not press 【OK】or【rotary knob】 key after setting the voltage, use up/down【direction key】key to select and set the next parameter, it can complete the setting of the three parameters in succession.

System Setup

This section is to introduce the system function of the variable frequency AC power, which includes the following contents:

System
Press 【Setup】key on the panel and then enter page.

Key Sound
Press【Setup】key will display the following interface, OFF presents turn off- key sound, ON presents turn on key sound. Key sound can also be changed by direction key or rotary knob.

Output Delay
Press【Setup】key twice to enter the output delay interface, use the numeric keypad or rotary knob to set time, and press【OK】or rotary knob to confirm the setting.

Protocol
Press【Setup】key three times to enter the protocol interface, use a rotary knob or up/down direction key to change the setting, and press【OK】or rotary knob to confirm the setting；
This variable frequency AC power supply provides SCPI and MODBUS protocol；
0 presents communication closed, 1 presents SCPI protocol, 2 presents MODBUS protocol.

Baud Rate
Press【Setup】key four time to enter the baud rate interface, use rotary knob or up/down direction key to change the setting, and press【OK】or rotary knob to confirm the setting;
Baud Rate has 4800, 9600, 19200 and 38400 to choose.

Address
Press【Setup】key five times to enter the address interface, use rotary knob or up/down direction key to change the setting, and press【OK】or rotary knob to confirm the setting;
This setting is only for MODBUS protocol， address is available for 1-250.

Introduction of Communication Interface and Terminal

This section is to introduce the communication interface of the variable frequency AC power supply, which includes the following contents:

RS-232C
UAP500A/1000A variable AC power supply has a DB9 main connector at the end, which can be connected to the COM port of a computer using the RS-232 standard communication cable. It can realize remote control.
Note: In actual use, the variable AC power supply only uses three of the pins 2.3.5 to communicate with the instrument.
It is recommended that to avoid electrical shocks, please turn off the instrument power when plugging and unplugging the connector.
Table 6-1 Pin Definition of COM Interface（RS232）

Product Information

The UAP500A/1000A is a programmable variable frequency AC power supply manufactured by Uni-Trend Technology (China) Co., Ltd. The product is protected by patent rights in China and other countries, including issued and pending patents. The instrument has a warranty period of one year from the date of purchase.

Pin No.

|

Symbol

|

Description

|

RS-232 Connect Terminal

---|---|---|---

1

|

—

|

Vacant

2

|

TXD

|

Send data

3

|

RXD

|

Receive data

4

|

—

|

Vacant

5

|

GND

|

Signal ground

6

|

—

|

Vacant

7

|

—

|

Vacant

8

|

—

|

Vacant

9

|

—

|

Vacant

Communication settings are mainly used to set the communication method between the varaiable frequency AC power supply and the host computer. The varaiable frequency AC power supply communicates with the host computer through RS232. Before connecting to the host computer, please make sure that the corresponding communication parameters are selected in the system settings, taking the SCPI protocol as an example:

Communication Setup

|

Setting

|

Description

---|---|---

Protocol

|

1

|

Set communication mode to SCPI protocol

BaudRate

|

4800/9600/19200/38400

|

Set the baud rate of RS232

Note： standard upper computer is only available for baud rate 4800 and above

Note：For secondary development, refer to SCPI protocol and MODE BUS protocol in the document “UAP500A/1000A Programming Manual”.

Technical Index

This section includes:

• Main Technical Index
• Matters of Calibrating Parameter

Table 7-1 Main Technical Index of UAP500A/1000A

INPUT
Phase| 1φ2W
Voltage| 220V±10%
Frequency| 47Hz – 63Hz
OUTPUT
Phase| 1φ2W
Voltage| 0-150VAC/0-300VAC AUTO
Frequency| 45-250Hz(0.01Step)
Maximum

Current

| L=120V| 4.2A| 8.4A
H=240V| 2.1A| 4.2A
Load Regulation| 1%
T.H.D| 3%(low level 120V,high level240V, with resistive load)
Frequency Stability| 0.01%
Display| Voltage Vrms, Current Arms, Frequency Fre, Power Wattage, Power

FactorPF

Voltage Resolution| 0.01V
Frequency Resolution| 0.01Hz
Current Resolution| 0.001A
Memory| M1~M9(V_F_A）

Measurement Accuracy

| Voltage| ±0.5%FS+5dgt
Current| ±0.5%FS+5dgt
Frequency| ±0.01%FS+5dgt
Power| ±0.5%FS+5dgt
Setup Accuracy| Voltage| ±1%FS
Frequency| ±0.1%FS
Accuracy of Power Factor| ±(0.4 reading+0.1%FS)
---|---
Communication Interface| RS232C

Cut-off current

| 0-Max Current（maximum current：maximum capacity/240V that is

P/240）

Output Protection| Over Current    Over Temp    Over Load    Short Circuit Warning
Weight(Kg)| 17.5kg| 20.7kg
Full Container Load（kg）| 21.1kg| 24.3kg
Size W×H×D(mm)| 430×132×483
Operating Environment| 0-40℃   20-80%RH

Remark：
Environment requirement of accuracy: 23℃±5 degree 20%-80%RH. The guaranteed period of accuracy: one year
Recommended calibration frequency: 1 time/year

Warranty Service

If the product is proven to be defective within the warranty period, UNI-T reserves the right to either repair the defective product without charging of parts and labor or exchange the defective product to a working equivalent product (determined by UNI-T). Replacement parts, modules and products may be brand new, or perform at the same specifications as brand-new products. All original parts, modules, or products which were defective become the property of UNI-T. Power cords, accessories and fuses, etc. are not included in this warranty.

• a) Repair damage caused by installation, repair or maintenance of personnel other than service representatives of UNI-T;
• b) Repair damage caused by improper use or connection to incompatible equipment;
• c) Repair any damages or failures caused by using a power source not provided by UNI-T;
• d) Repair products that have been changed or integrated with other products (if such change or integration increases time or difficulty of repair).

The warranty is formulated by UNI-T for this product, replacing any other express or implied warranties. UNI-T and its distributors refuse to give any implied warranty for marketability or applicability for special purposes. For violation of the warranty, repair or replacement of defective products is the only and all remedial measure UNI-T provides for customers.
No matter whether UNI-T and its distributors are informed of any possible indirect, special, occasional or inevitable damage in advance, they assume no responsibility for such damage.

Limited Warranty and Liability

The warranty is inapplicable to any defects, failures or damages caused by accident, normal wear of components, use beyond the specified scope or improper use of the product, or improper or insufficient maintenance. UNI-T is not obliged to provide the services below as prescribed by the warranty: a) Repair damage caused by installation, repair or maintenance of personnel other than service representatives of UNI-T; b) Repair damage caused by improper use or connection to incompatible equipment; c) Repair any damages or failures caused by using power source not provided by UNI-T; d) Repair products that have been changed or integrated with other products (if such change or integration increases time or difficulty of repair).

Product Usage

In order to use the UAP500A/1000A safely and correctly, please read the user manual thoroughly, especially the safety notes. The customer refers to the individual or entity that is declared in the guarantee. In order to obtain the warranty service, the customer must inform the defects within the applicable warranty period to UNI-T, and perform appropriate arrangements for the warranty service.

When using the product, ensure that it is within the specified scope and frequency. Do not use power sources not provided by UNI-T to avoid damages or failures. If the product is defective, contact UNI-T for repair or exchange of the defective product. Power cords, accessories and fuses are not included in the warranty. Improper use or insufficient maintenance of the product may cause defects, failures, or damages that are not covered by the warranty. To prevent this, follow the instructions in the user manual and perform proper maintenance of the product.

When selling or transferring the product to a third party within one year from the date of purchase of the product, inform them that the warranty period of one year shall be from the date of the original purchase from UNI-T or an authorized UNl-T distributor.

References

• UNI-T Voltage Meter, Multimeter, Oscilloscope | UNI-T-UNI-T Voltage Meter, Multimeter, Oscilloscope | UNI-T

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