CREATIVE ELECTRONICS SMC-3303X Manual de usuario

No.35, Hartron Complex, Sector-18, Electronic City, Type-A, Udyog Vihar, Phase-IV, Gurugram 122015 Haryana, India

Tel: +91-124-4909 850; Fax: +91-11 66173638

Email: ptgsales@smcel.com; Web: www.smcel.com

Triple Output Digital

Power Supply

Model No.: SMC-3303X

Operation Manual

BENCHTOP INSTRUMENT

S.M.CREATIVE

ELECTRONICS LIMITED

No.35, Hartron Complex, Sector-18, Electronic City, Type-A, Udyog Vihar, Phase-IV, Gurugram 122015 Haryana, India

Tel: +91-124-4909 850; Fax: +91-11 66173638

Email: ptgsales@smcel.com; Web: www.smcel.com

SAFEFY INSTRUCTION........................................................................................................................................I

1. OVERVIEW.....................................................................................................................................................- 1 -

1.1 Operation and Storage Environment...................................................................................................- 1 -

1.2 Introduction ...........................................................................................................................................- 1 -

1.5 Front Panel Overview............................................................................................................................- 2 -

1.6 Rear Panel Overview.............................................................................................................................- 5 -

1.7 CV/CC Crossover Characteristics .......................................................................................................- 6 -

2. SETUP ..............................................................................................................................................................- 7 -

2.1 Power Up................................................................................................................................................- 7 -

2.2 Load Cable Connection.........................................................................................................................- 7 -

2.3 Output ON/OFF.....................................................................................................................................- 8 -

2.4 Beep ON/OFF.........................................................................................................................................- 8 -

2.5 Front Panel Lock ...................................................................................................................................- 8 -

3. OPERATION...................................................................................................................................................- 9 -

3.1 CH1/CH2 Independent Mode...............................................................................................................- 9 -

3.2 CH3 Independent Mode........................................................................................................................- 9 -

3.3 CH1/CH2 Tracking Series Mode........................................................................................................- 10 -

3.4 CH1/CH2 Tracking Parallel Mode ....................................................................................................- 13 -

4. SAVE/RECALL SETUP...............................................................................................................................- 15 -

4.1 Save Setup ............................................................................................................................................- 15 -

4.2 Recall Setup..........................................................................................................................................- 15 -

5. REMOTE CONTROL ..................................................................................................................................- 16 -

5.1 Remote Control Setup.........................................................................................................................- 16 -

5.2 Remote Connection Step.....................................................................................................................- 16 -

5.3 Command Syntax.................................................................................................................................- 17 -

5.4 Error Messages....................................................................................................................................- 17 -

5.5 Command List......................................................................................................................................- 17 -

5.6 Command Details.................................................................................................................................- 18 -

6. MAINTENANCE...........................................................................................................................................- 21 -

6.1 Inspection .............................................................................................................................................- 21 -

6.2 Fuse Replacement................................................................................................................................- 21 -

6.3 Cleaning................................................................................................................................................- 21 -

SAFEFY INSTRUCTION

This chapter contains important safety instructions that you must follow when operating the instrument and when

keeping it in storage. Read the following before any operation to insure your safety and to keep the best condition for

the instrument.

Safety Symbols

The following safety symbols may appear in this manual or on the instrument:

WARNING Identifies conditions or practices that could result in injury or loss of life.

CAUTION Identifies conditions or practices that could result in damage to the instrument or to

other properties.

DANGER High voltage

ATTENTION Refer to the manual

Protective conductor terminal

Earth (ground) terminal

Safety Guidelines

CAUTION

Before plugging into local AC mains, check and make sure that the output voltage is

compatible to the load. (It is suggested to disconnect a load before plugging into

local AC mains.

Do not use this instrument near water.

Do not operate or touch this instrument with wet hands.

Do not open the casing of the instrument when it is connected to AC mains.

The max.output voltage of the instrument may be over 60VDC, avoid touch the

metal contact part of the output terminals.

Do not use the instrument in an atmosphere which contains sulfuric acid mist or

other substances which cause corrosion to metal.

Do not use the instrument in a dusty place or a highly humid place as such will

cause instrument reliability degradation and instrument failures.

Install the instrument in a place where is free from vibration.

Install the instrument in a place where the ambient temperature is in range of

-10~70℃.Note that the instrument operation may become unstable if it is operated

in an ambient temperature exceeding the range of 0~40℃

Power supply

WARNING

AC Input voltage: 110V/220V ±10%, 50/60Hz

Connect the protective grounding conductor of the AC power cord to an earth ground to

avoid electrical shock.

Fuse

WARNING

Fuse type: 110V: T6.3A /250V, 220V: T3.15A/250V.

Make sure the correct type of fuse is installed before power up.

Replace the AC fuse with the same type and rating as the original fuse.

Disconnect the power cord before fuse replacement.

Make sure the cause of fuse blowout is fixed before fuse replacement.

- 1 -

1. OVERVIEW

This chapter describes the instrument in a nutshell, including its main features and front /rear panel introduction. After

going through the overview, follow the SETUP chapter to properly power up and set operation environment.

1.1 Operation and Storage Environment

Operation Environment

Location: Indoor, no direct sunlight, dust free, almost non-conductive pollution (note below)

Relative Humidity: < 80%

Altitude: < 2000m

Temperature: 0° to 40°

Storage Environment

Location: Indoor

Relative Humidity: < 70%

Temperature: -10° to 70°

1.2 Introduction

This series of regulated programmable DC power supply are light weight, adjustable, multifunctional work stations.

They have three independent outputs: two with adjustable voltage level and one with fixed level selectable from 2.5V,

3.3V and 5V. The power supply can be used for logic circuits where various output voltage or current are needed, and

for tracking mode definition systems where positive and negative voltages with good accuracy are required.

Independent /Tracking Series /Tracking Parallel

The three output modes of the power supply - independent, tracking series, and tracking parallel - can be selected by

pressing the TRACKING key on the front panel. In the independent mode, the output voltage and current of each

channel are controlled separately. The isolation degree, from output terminal to chassis or from output terminal to

output terminal, is 300V. In the tracking modes, both the CH1 and CH2 outputs are automatically connected in series or

parallel; no need to connect output leads. In the series mode, the output voltage is doubled; in the parallel mode, the

output current is doubled.

Constant Voltage/Constant Current

Except for CH3, each output channel is completely transistorized and well-regulated, and works in constant voltage

(CV) or constant current (CC) mode. Even at the maximum output current, a fully rated, continuously adjustable output

voltage is provided. For a big load, the power supply can be used as a CV source; while for a small load, a CC source.

When in the CV mode (independent or tracking mode), output current (overload or short circuit) can be controlled via

the front panel. When in the CC mode (independent mode only), the maximum (ceiling) output voltage can be

controlled via the front panel. The power supply will automatically cross over from CV to CC operation when the

output current reaches the target value. The power supply will automatically cross over from CC to CV when the output

voltage reaches the target value. For more details about CV/CC mode operation, see page8.

Automatic Tracking Mode

The front panel display (CH1, CH2) shows the output voltage or current. When operating in the tracking mode, the

power supply will automatically connect to the auto- tracking mode.

- 2 -

Main Features

Performance Low ripple & noise, intelligent cooling fan



Compact design, light weight

Operation

Constant voltage/constant current operation

Tracking series/tracking parallel operation

Output ON/OFF control

3 outputs:30V/3A×2, 2.5V/3.3V/5V/3A×1

Digital panel control

Panel lock function

4 programming presets for voltage and current save/recall

Coarse and fine control for voltage and current

Software calibration

Beeper output



Voltage and current limit preset

Protection Over load, over temperature protections



Reverse polarity protection

Interface



USB interface for remote PC control

1.5 Front Panel Overview

Fig.1.5-1 Front panel

- 3 -

Display

Voltmeter

Displays CH1 or CH2 output voltage

Ammeter Display CH1 or CH2 output current

Control Panel

Memory keys

Saves or recalls panel settings. Max.4 sets for programming preset. Refer

to page 17 for details.

CH1/CH2

beep keys

Selects the output channel for level adjustment. Refer to page 11 for

level setting details

Pressing and holding CH2 key enables beep sound. Refer to page 10 for

details.

Parallel/Series

keys

Activates Tracking Parallel operation or Tracking Series operation. Refer

to page 12 for details.

Lock key Locks or unlocks the front panel settings. Refer to page 10 for details.

Output key Turns the output on or off.

Voltage

knobs

Adjusts the output voltage level for CH1 or CH2. Pressing the knob

switches for coarse and fine level setting. When in fine adjustment, the

FINE indicator lights on.

Current knobs

Adjusts the output current level for CH1 or CH2. Pressing the knob

switches coarse and fine level setting. When in fine adjustment, the

FINE indicator lights on.

- 4 -

Terminals

Power switch

Turns on or off the main power. Refer to page 9 for power up

sequence.

GND terminal Accepts a grounding wire.

CH1 output Outputs CH1 voltage and current.

CH1 CV/CC

indicator

Indicates CH1 constant voltage or constant current operation mode.

CH2 output Outputs CH2 voltage and current.

CH2 CV/CC/

PAR indicator

Indicates CH2 constant voltage, constant current or tracking parallel

operation mode.

CH3 output

Outputs CH3 voltage and current.

CH3 overload

Indicator Indicates when CH3 output current is overloaded.

CH3 voltage

Selector Selects CH3 output voltage from 2.5V, 3.3V, 5V.

- 5 -

1.6 Rear Panel Overview

Fig.1.6-1 Rear panel of models with USB interface

USB connector

Accepts a USB slave connector for command-based remote control (page 18).

For models with USB interface.

Power cord/fuse

socket

The power cord socket accepts the AC mains. Refer to page 9 for power up

details.

The fuse holder contains the AC main fuse. Refer to page 23 for details of

fuse replacement.

AC line voltage

selector Selects AC line voltage from 110V/220V.

- 6 -

1.7 CV/CC Crossover Characteristics

Background The instrument automatically switches between constant voltage mode (CV) and constant current

mode (CC), according to load condition.

CV mode When the current level is smaller than the output setting, the instrument operates in Constant

Voltage mode. The indicator on the front panel turns green (C.V.) The Voltage level is kept at the

setting and the Current level fluctuates according to the load condition until it reaches the output

current setting.

CC mode When the current level reaches the output setting, the instrument starts operating in Constant Current

mode. The indicator on the front panel turns red (C.C.) The Current level is kept at the setting but

the Voltage level becomes lower than the setting, in order to suppress the output power level from

overload. When the current level becomes lower than the setting, the instrument goes back to the

Constant Voltage mode.

Diagram

- 7 -

2. SETUP

This chapter describes how to properly power up and configure the power supply series before operation.

2.1 Power Up

Select AC line

voltage

Before powering up the power supply, select the AC input voltage from the rear panel.

Connect AC

power cord

Connect the AC power cord to the rear panel socket.

Power on Press the power switch to turn on the power. The display shows the initialization screen,

followed by the last recalled settings.

Power off Press the power switch again to turn off the power.

2.2 Load Cable Connection

Standard

accessory

1. Turn the terminal counterclockwise and loosen the screw.

2. Insert the cable terminal.

3. Turn the terminal clockwise and tighten the screw.

Banana plug Insert the plug into the socket.

Wire type When using load cables other than the attached, make sure they have enough current capacity for

minimizing cable loss and load line impedance. Voltage drop across a wire should not excess 0.5V.

The following list is the wire current rating at 450A/cm

Wire size (AWG)

Max. current (A)

2.5

12 16

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