EZ Digital GP-3010 Specifications

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EZ Digital GP-3010 Specifications | Manualzz

99 Washington Street

Melrose, MA 02176

Fax 781-665-0780

TestEquipmentDepot.com

DC POWER SUPPLY GP-4303D

3.00

A

30.0

V

C.C

C.V

CURRENT FINE VOLTAGE

POWER - GND +

C.C

DC POWER SUPPLY GP-4303A

C.V

.

CURRENT FINE VOLTAGE

POWER

R

- GND +

INSTRUCTIONS

Thank you for purchasing EZ DIGITAL products.

The instruments produced by EZ DIGITAL are high products technplogy products made under strict quality control.

We guarantee their exceptional precision and utmost reliability.

For proper use of this product, please read this manual carefully.

EZ Digital Co., Ltd.

1. To maintain the precision and the reliability of the product , use it in the standard setting.

Operating temperature : 5℃ ~ 40℃

Operating humidity : 80% ~ 50%

Storage temperature : 0℃ ~ 70℃

Storage Humidity : less than 85%

2. For quality improvement , the exterior design and specifications of the product

can be changed without notice.

3. Should any further information be required , please contact the EZ DIGITAL

company or sales outlet.

WARRANTY

Warranty service covers one year the date of original purchase.

In case of technical failure a year,repair service will be provided by EZ DIGITAL company.

We charge for repairs after the one year warranty period expires.

When the failure is a result of user's neglect , natural disaster or accident , we charge for repaires regardless of the warranty period.

For more professional repair service , be sure to contact us or sales outlet.

[1]

1. INTRODUCTION

GP-4303A/D, 4185A/D series are regulated DC POWER SULLPY units with voltmeter and amperemeter : GP-4303A/D can supply the DC power of 0 to 30V/3A

GP-4185A/D can supply 0 to 18V/5A.

(A means Analog meter, D means Digital meter)

They are provided with continuously variable coarse adjustment and the output voltages and with continuously variable current adjustment in a range of 10 to 100%.

Current limiting and overload protection functions are built in to protect the over current.

The supply features anloge voltmeter and amperemeter, enabling the user to monitor the supply's operation at a glance.

LEDs for Constant current ( C.C ) and Constant Voltage ( C.V ) enables monitoring of operation status.

Main input voltage AC115 or 230V selectable and 50/60Hz are supported.

2. FEATURE

Built in output current limit circuit (Overload Protection)

Availability of series and / or parallel operation

Constant Current and Constant Voltage

Low Ripple

Remote Control Operation (Analog Control Option)

Built in Analog Voltage meter and Amperemeter

[3]

3. PRECAUTIONS

3-1. Line voltage selection

This instrument must be operated with the correct line voltage selector switch setting and the correct line fuse for the line voltage selected to prevent damage.

The instrument operates from either a 90V to 132V or 198V to 250V line source.

Before line voltage is applied to the instrument , make sure the line voltage selector switch is set correctly.

In the case of the line voltage selector switch selected , must be operated to the correct line fuse.

To change the line voltage selection

1. Make sure the instrument is disconnected from the power source.

2. Pull out the line voltage selector switch on the bottom panel.

Select the arrow mark position of the switch from Table 3-1.

Select the arrow mark to the desired position and plug it in.

3. Pull out the line fuse holder containing the fuse for overload protection.

Replace the fuse in the holder with the correct fuse from table3-1 & plug it in.

Table 3-1. Line voltage Selection & Fuse Ratings

Line Voltage

AC 90 ~ 110

AC 108~ 132

AC 198~ 242

AC 207~ 250

Select Switch Mark

115V

230V

Fuse Ratings (250V)

GP-4303D/A , GP-4185D/A

T3.15A

T1.6A

!!

For continued protection against fire,replace the line fuse only with a fuse of the specified type and rating.

3-2. INSTALLATION & HANDLING PRECAUTIONS

When placing the power supply in service at your workplace,observe the following precautions for best instrument performance and longest service life.

1. Avoid placing this instrument in an extremely hot and cold place.

Specifically, don't leave this instrument in a close car,exposed to sunlight in

midsummer, or next to a space heater.

[4]

2. Don't use this instrument immediately after bring it in from the cold.

Allow time for it to warm to room temperature. Similary don't move it from a

warm place to a very cold place,as condensation might impair its operation.

3. Do not expose the instrument to wet or dusty enviroments.

4. Do not place liquid-filled containers on top of this instrument.

A spill could seriously damage the instrument.

5. Do not use this instrument where it is subject to serve viration,or strong blows.

6.Do not place heavery objects on the case,or otherwise block the ventilation holes.

7. Do not use this power supply in strong magnetic fields,such as near motors.

8. Do not insert wires , tools , etc. through the ventilation holes.

9. Do not leave a hot soldering iron near the instrument.

10. Do not place this instrument face down on the ground, or damage to the knobs

may resuit.

11. Do not connect other power source to + ,- of the output terminal.

12. Ground terminal of power code must connect to the ground.

13. According to output porarity, it solved problem ESD and Floating voltage using

the connect ground port to terminal of output .

14. To connect the ground, be careful at ground porarity of load.

15. Input voltage of instrument must be equal to AC power voltage.

16. It use to thick and short wire of output terminal in possible.

3-3. CLEARING

1. To clean stained casing, lightly rub the stained area with a soft cloth dipped in a

neutral detergent.

2. If the surface of the panel is dirty, use the same method to clean.

If the panel is heavily stained, rub the affected area lighty with a soft cloth soaked in light neutral detergent or alcohol.

3. Never use highly volatile material such as benzene or paint thinner.

[5]

4. SPECIFICATIONS

Model GP-4303D GP-4303A GP-4185D GP-4185A

Output polarity

Output current

Ripple Voltage

Line Regulation

Load Regulation

Positive & Negative

0 ~3A 0 ~5A

Less than 2mVp-p

Less than 0.01% +2mV for power source voltage change of ±10%

Less than 0.01% +3mV for load variation of 0 to 100%

Voltmeter Accuracy

Ampermete Accuracy

±(1%±1digit)

Insulation between

Compensation/

Protection circuit

Ambient temperature

2.5% F S ±(1%±1digit) 2.5% F S

More than 10㏁ at DC 500V chassis and output terminal

More than 50㏁ at DC 500V chassis and AC plug.

Overload protection circuit of constant current self restoring type

5℃ ~ 40℃

Operating Humidity 50% ~ 80%

Dimension

Weight

131(W) x 150(H) x 273(D)

Approx.4.5Kg

Accessories

Power source

Power Consumption

Short circuit Bar , Manual , Fuse

AC 115/230V , 50/60Hz

130VA 130VA

[6]

5.DECRIPTION OF PANEL FUNCTION

5-1. Front Panel Description

DC POWER SUPPLY GP-4303D

3.00

A

30.0

V

C . C C . V

CURRENT FINE V OLTAGE

C . C C . C C . V

DC POWER SUPPLY GP-4303A

CURRENT FINE VOLTAGE

POWER

ON

OFF

- GND +

POWER

ON

OFF

- GND +

⑬ ⑨

Analog Type

⑩ ⑪ ⑬

1. POWER SWITCH : This switch turns on and off the power.

2.CURRENT METER : Indicates the load current

Digital Type

⑩ ⑪

3. VOLTAGE METER : Set an output voltage while reading the voltage indication.

4. C.C LED : Display LED for overcurrent.

5. C.V LED : Display LED for static state current & voltage operating.

6. CURRENT VR : The current limiting knob for setting and adjusting the output current in a

range of max. 10 ~100%

7. FINE VR : The fine adjustment knob of the output voltage.

8. COARSE VR : The coarse adjustment knob of the output voltage.

9. OUTPUT TERMINAL (-) : The negative side of output terminal.

10. OUTPUT TERMINAL (GND) : When the positive polarity or negative polarity is to be connected to

the ground,either an appropriate output terminal should be connected

to the GND by a short circuit bar supplied as accessory.

When no bar connection is made,the terminal is used as the ground terminal

11. OUTPUT TERMINAL (+) : The positive side of output terminal.

[7]

6. OPERATIONS

6-1 INDEPENDENT OPERATION

(1) The (+) terminal or the(-) terminal is to be connected always to the GND.

Terminal(GND) with short circuit bar as an accessory should be connected as shown in

Fig6-1.

When positive output polarity is required.

- GND +

SHORT CIRCUIT BAR

Fig. 6-1

(2) Connect the AC Power cord to the power source of the specified voltage, and turn on

the power switch.

(3) To set the load voltage,slowly turn the voltage adjusting knob (5) caorse clockwise

with no load ,while watching the amperemeter.

The knob (5) is for coarse adjustment,and the knob(4) is for fine adjustment.

(4) Load current setting is used for limiting the current applied to a device to be tested at

a specified power or to protect the device from the over current.

To set the current, connect the (+) and (-) terminala by a thick lead wire.

Slowly turn the current adjustment knob (3) , and set the current while watching the

amperemeter indication.

At this time,set the voltage adjustment knob (5) full counter clockwise and set the

white mark of the FINE adjustment knob (4) at middle.

The minimum current that can be set is as follows.

GP-4303D/A : Approx. 200mA ~ 3A GP-4185D/A : Approx. 350mA ~ 5A

After setting a limiting current,remove the short circuit wire.

Then set the voltage to a required voltage level.

(5) After completing the above procedure,watch the polarity of a device to be applied

and use the instrument.

If the voltmeter indication becomes less than the sset level for a defect of a device to

be tested or for any other reason, the overcurrent protection circuit is activated,

resulting in switching into the constant current operation from the constant voltage

operation.

When the instrument is to be used in the constant voltage operating condition,set the

current adjustment knob full clockwise.

In this case the short circuit current is 3A +10% for the GP-503, 5A +10% for the

GP-305/505,and 10A + 5% for the GP-3010.

[8]

6-2 SERIES OPERATION

(1) By connecting a couple of the units in series a higher voltage than a single unit is

available. In such a case,no terminal should be applied with a voltage more than

the rating voltage against the ground potential between a terminal and panel chassis.

The rating voltage against the ground is ±100V.

With a series operation of couple of the units, a double of the rating voltage of a single unit and current of a single units is available.

When two unit,either GP-4303A/D are used the maximum voltage available +60V or -60V.

When two unit,either GP-4185A/D are used the maximum voltage available +36V or -36V

NOTE : 1. The overcurrent protection is effective at the smaller value of the two.

2. Series operation between other types is not available.

(2) Notes on series operation

When the series connected two units of regulated DC power supplies are overloaded,

the unit in which the overcurrent protection circuit activated first is applied with the reverse

voltage from the output of the unit,and so the series control element of the former will be

damaged.

To protect this problem,connect two diodes between the output terminals of the units as shown in Fig.6-2

Diodes to be used should be wiwth a high voltageee than the maximum rating voltage of a single unit,and the voltage rating of sioses should be 2 to 3 times of the maximum voltage of the series connection.

(+)

(-)

(+)

L

O

A

D

(-)

(3) Connection

- GND +

Fig. 6-2

- GND +

(-)

Fig. 6-3

(a) For the negative grounding : As shown by a solid line fig.6- 3

(b) For the positive grouding : As shown by a dotted line fig.6-3

Do not connect the GND terminal to different polarities other than fig.6-3

[9]

6-3 PARALLEL OPERATION

(1) When a current capacity larger than a single unit is required, a couple of the units may be

used in a parallel connection.

In a parallel operation,a unit becomes the main unit and other becomes the sub-unit.

Setting of the voltage and current should be made of the main unit.

(2) Connection

Make the connection while the power off.

- GND + - GND +

(main) (sub)

LOAD

Fig.6-4

For parallel operatio,.make the connection in the sequence of the (+) terminal of the main unit,(+)

terminal of the sub-unit,(-) terminal of the main unit,and(-) terminal of the sub-unit.

Then connect the wires between the Parallel terminal (main unit) and the Parallel terminal (sub unit)

Use thick wires for all the connections.

(a) Turn the voltage knob (5),(4) and the current knob(3) of the sub unit full clockwise.

(b) The voltage and current are variable by the main unit.

The output current limit can be selected within a range of about 10 to 100% of the

double of the maximum rating current.

In this case,as the load current increase, the ampere meters of both main and sub units

swing,and the load current is indicated as the sum of both amperemeters.

NOTES : Other type of regulated DC Power supply can be connected for parallel operation.

The maximum number of units for parallel operation is limited to 2 units.

7. NOTES ON ENVIRONMENTAL CONDITION

7-1. Avoid using the unit in such a place where the ambient temperature exceeds 40℃ or under

the direct sum shines.

Limit the maximum output current when the unit is used in such a place where ventilation is

interrupted or a radiation exists other equipments.

7-2. Use the instrument whitin 10% tolerance of the specified frrom the power source.

[10]

8. CURRENT LIMITING CIRCUIT

When the output terminals are short circuited by mistake,the current limiting circuit is activated to limit the flow of the current in excess of the rating output current,so that the control elements and the amperemeters connected in series operation an be protected from the sudden damage.

The output limit current caan be set in a range from 10 to 100% of the rating current, and when the output current reaches the set value,the instrument operates in the constant current condition.

As the output current comes down below the set value,the constant voltage condition is automatically resumed.

9. TO REPLACE THE FUSE

Pull out F1 below with screw driver and get rid of F1, take out spare Fuse in the holder

Put it in the position of F1.

!

Turn off the power sw and remove the power cord, change the abnormal fuse

Fuse(F1)

SPARE FUSE

[11]

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