B+K precision 1620A Manuale utente

INSTRUCTION

MANUAL

MANUAL DE INSTRUCCIONES

Models 1620A/ 1621A/ 1622A/

1623A/ 1626A/ 1627A

DC REGULATED

POWER SUPPLY

TABLE OF CONTENTS

7. MAINTENANCE........................................................................13

7.1 Main fuse replacement.............................................................13

7.2 Calibrations..............................................................................13

7.3 Voltage calibration...................................................................14

7.4 Voltmeter alignment ................................................................14

7.5 Current calibration...................................................................14

7.6 Ammeter alignment..................................................................14

LIMITED WARRANTY................................................................15

SERVICE INFORMATION..........................................................16

1. INTRODUCTION........................................................................3

2. FEATURES ..................................................................................3

3. SPECIFICATIONS......................................................................4

4. PRCAUTIONS FOR USE ...........................................................6

4.1 Confirming the supply range.....................................................6

4.2 Precautions for connection of output terminals.........................6

4.3 Operating environment..............................................................7

5. EXPLANATION OF PANEL......................................................7

5.1 FRONT PANEL........................................................................ 7

5.2 REAR PANEL ..........................................................................9

6. OPERATION PROCEDURES .................................................10

6.1 Stand-alone operation..............................................................10

6.2 Serial connection.....................................................................10

6.3 Parallel operation (MASTER / SLAVE Control)....................11

1. INTRODUCTION

The BK Precision Analog and Digital series are high quality

serial control type DC Regulated Power Supplies. These models

can be operated at constant voltage or constant current mode

whose output can be varied from 0 up to the rated values for

respective model.

It is a compact unit provided with separate voltage and

current meters (Analog for 1620A, 1622A, 1626A and 3-digit

LEDS for 1621A, 1623A, and 1627A series) for monitoring the

output voltage and current simultaneously. In terms of

operability, these units enable high precision, continuous

variability via coarse and fine adjust knobs. The BK Precision

Analog and Digital series can be connected in parallel with

multiple units of the same model set up a “master/slave”

configuration to increase the output current capability. Serial

connection of multiple units can be used to increase the output

voltage level.

This family of power supplies provides clean and stable DC

output which is most suitable for many areas including

laboratory, industrial, field service, hobby, and telecommucation

applications.

2. FEATURES

•The BK Precision Analog and Digital series are constant

voltage / constant current power supplies which feature

excellent line and load regulations, low ripple and noise

characteristics.

•The units feature separate voltage and current meters so

that output voltage and current can be monitored

simultaneously.

•Output voltage and current can be adjusted continuously

in full range to any desired values. Adjustment can be

done easily and precisely by using separate coarse and

fine adjust knobs.

•The constant current circuit operates to protect against

overload and output short circuit. The limiting current

values can be preset in the full range of the rated values

for respective model.

•Multiple units of power supplies of same family can be

connected in series to provide higher output voltage.

•Multiple units of power supplies of SAME model can be

connected in parallel (master / slave configuration) to

achieve higher output current.

3. SPECIFICATIONS

1620A

1626A

1622A

1621A

1627A

1623A

OUTPUT VOLTAGE

0 - 18V

0 - 30V

0 - 60V

0 - 18V

0 - 30V

0 - 60V

OUTPUT CURRENT

1.5A

CONSTANT VOLTAGE CHARACTERISTICS

Load regulation (0-100%)

0.02% +3mV

Line regulation

(120VAC + 10 %, -6 % )

0.02% +3mV

Ripple and noise r.m.s

1mV max.

CONSTANT CURRENT CHARACTERISTICS

Load regulation (0-100%)

0.02% +3mA

Line regulation

(120VAC + 10 %, -6 % )

0.02% +3mA

OUTPUT

Output terminals ( color )

( + ) Red , ( –) Black , ( GND ) Green

Ground proof voltage

± 180V

INSTRUMENTATION

Voltmeter

Analog

3 digits LEDS

Ammeter

Analog

3 digits LEDS

Voltmeter accuracy

± 7% fs

± 2% + 2 digits

Ammeter accuracy

± 7% fs

± 2% + 2 digits

FUNCTIONS

Serial connection

( independent control mode )

Can be connected in series ( within limits of ground proof voltage )

Parallel operation

( master –slave mode )

Can be operated in “one-control” parallel configuration ( only same model )

COOLING SYSTEM

Natural Convection

POWER CONSUMPTION

VA / W

( for rated load of AC 220V )

Approximate 210

Approximate 220

AC INPUT

Voltage , Frequency

120V AC ± 10%, 60 Hz (120/220/230/240V AC ± 10%, 50/60Hz version available)

Operating ambient temperature

5 to 40°C 10 –80% R.H.

DIMENSIONS AND WEIGHT

Dimensions ( W x H x D )

205 x 115 x 270 ( mm )

Weight

Approximate 6 Kgs

Approximate 7.4 Kgs

FUSE RECOMMENDED

Input fuse F2

AC 100V, 110V, 120V

3AF

AC 220V, 230V, 240V

2AF

Internal fuse F1

500mAF

NOTE: Specifications and information are subject to change without notice. Please visit www.bkprecision.com for the most current product information.

4. PRECAUTIONS FOR USE

4.1 . CONFIRMING THE SUPPLY RANGE

The unit must be used within its specified range. The rated input

voltage can be found on the rating table under the unit. Before

plugging into the AC supply outlet, check if the input rating conforms

to your local supply. For certain models, a voltage selector is

available, switch the voltage selector to the correct position before

use. Also, please check that you have the correct fuse inserted in the

fuse box below the AC input receptacle.

4.2. PRECAUTIONS FOR CONNECTION OF

OUTPUT TERMINALS

These units are a floating type power supply. For ordinary use, be

sure that the MASTER/SLAVE switch on the rear panel is set to

MASTER position and either the (+) output terminal or the (−)

terminal is connected to the GND terminal (chassis GND) via the

shorting bar.

Warning: For model 1622A and 1623A, the maximum output

voltage is up to 60Vdc. Touching the live metal part of output terminals

may be hazardous. User must avoid touching the live metal part of output

terminals.

4.3. OPERATING ENVIROMENT

Be sure to use this unit within the specified ambient

temperature range listed in the specification table.

Because the unit is cooled by natural convection, do

not place objects on top to block the convection. Also

user must avoid placing the unit on or near any heat

emitting devices or use multiple units in stacked

configuration. For best results, use the unit in an

environment that has good cross-ventilation.

Altitude up to 2000M

Installation category: CAT II

Pollution degree: 2

Indoor use only

5. EXPLANATION OF PANELS

5.1 FRONT PANEL

Fig. 5.1

1. Power switch

Turns the power supply ON-OFF. The switch will be

lighted up when the unit is ON.

2. DC Voltmeter

Indicates the present output voltage. (Analog for

162A, 1622A, 1626A and 3-digit LEDS for 1621A,

1623A, and 1627A series)

3. DC Ammeter

Indicates the present output current. (Analog for

162A, 1622A, 1626A and 3-digit LEDS for 1621A,

1623A, and 1627A series)

4. Constant current mode (C.C.) indicator

Indicates the power supply is operating in constant

current mode.

5. Constant voltage mode (C.V.) indicator

Indicates the power supply is operating in constant

voltage mode.

6. Voltage coarse adjust

Coarse adjust knob for the output voltage in voltage

mode.

7. Voltage fine adjust

Fine adjust knob for the output voltage in voltage mode.

8. Current coarse adjust

Coarse adjust knob for current limiting point and current

value in constant current mode.

9. Current fine adjust

Fine adjust knob for current limiting point and current

value in constant current mode.

10. Output terminal positive (+)

Terminal for tapping of positive (+) output.

11.Output terminal negative (–)

Terminal for tapping of negative (–) output.

12.Ground terminal (GND)

Chassis ground terminal. Normally, this is connected to

either (+) or (–) terminal depend on application.

5.2 REAR

13. Master / Slave switch

Used during “master / slave control” parallel operation in

MASTER / SLAVE configuration. For normal operation,

switch should be set to MASTER.

14. In / out terminals for Master / Slave operation

Control terminals for use in the “MASTER / SLAVE control”

parallel operation mode.

15. Heat sink

Heat sink for the power supply. Be careful as this area can

become quite hot during operation.

16. Main Fuse

17. Power cable

6. OPERATION PROCEDURES

6.1 . STAND-ALONE OPERATION

When using the power supply in stand-alone mode, simply

operate by manipulation of the panel switches and

adjustment knobs as needed.

However, be sure that MASTER / SLAVE switch is set to

MASTER position.

6.2. SERIAL CONNECTION

Two or more units of the power supply can be hooked up in

series to achieve higher output voltage. The resulted output

will be sum of the outputs of the individual units. In this

situation, however, care must be taken that the voltage of

neither of the terminals with respect to the chassis GND

exceed the ground proof voltage of + 180V

•SINGLE VOLTAGE CONNECTION

For connection as shown in FIG.6.1, the output voltage

will be the sum of individual supplies and output

current will be limited to within the value specified for

a single unit whichever is lower. For positive ground

terminal to output positive point and for negative

ground system, hook-up the ground terminal to the

negative output point.

•PLUS / MINUS CONNECTION

For connection as shown in FIG.6.2 where the intermediate

point is hooked up to ground, the configuration can be used as

Plus / Minus power supply.

FIG. 6.1

FIG. 6.2

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