B&K Precision Model 1621A 0 to 18V, 0 to 5A Digital Display DC Power Supply Instruction manual

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B&K Precision Model 1621A 0 to 18V, 0 to 5A Digital Display DC Power Supply Instruction manual | Manualzz

INSTRUCTION

MANUAL

Models 1620A/ 1621A/ 1622A/

1623A/ 1626A/ 1627A

DC REGULATED

POWER SUPPLY

TABLE OF CONTENTS

1. INTRODUCTION ........................................................................ 3 7. MAINTENANCE ........................................................................13

7.1 Main fuse replacement .............................................................13 2. FEATURES .................................................................................. 3

7.2 Calibrations ..............................................................................13 3. SPECIFICATIONS ...................................................................... 4

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

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

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

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

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

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

7.6 Ammeter alignment ..................................................................14 4.3 Operating environment .............................................................. 7

LIMITED WARRANTY ................................................................15 5. EXPLANATION OF PANEL...................................................... 7

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

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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.

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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

OUTPUT VOLTAGE

OUTPUT CURRENT

0 - 18V

5A

CONSTANT VOLTAGE CHARACTERISTICS

Load regulation (0-100%)

1626A

0 - 30V

3A

1622A

0 - 60V

1.5A

1621A

0 - 18V

5A

1627A

0 - 30V

3A

1623A

0 - 60V

1.5A

0.02% +3mV

Line regulation

(120VAC + 10 %, -6 % )

Ripple and noise r.m.s

0.02% +3mV 0.02% +3mV 0.02% +3mV 0.02% +3mV 0.02% +3mV 0.02% +3mV

CONSTANT CURRENT CHARACTERISTICS

Load regulation (0-100%)

1mV max.

0.02% +3mA

Line regulation

(120VAC + 10 %, -6 % )

OUTPUT

Output terminals ( color )

Ground proof voltage

INSTRUMENTATION

Voltmeter

Ammeter

Voltmeter accuracy

Ammeter accuracy

0.02% +3mA 0.02% +3mA

Analog

Analog

± 7% fs

± 7% fs

0.02% +3mA 0.02% +3mA 0.02% +3mA 0.02% +3mA

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

± 180V

3 digits LEDS

3 digits LEDS

± 2% + 2 digits

± 2% + 2 digits

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FUNCTIONS

Serial connection

( independent control mode )

Parallel operation

( master – slave mode )

COOLING SYSTEM

POWER CONSUMPTION

VA / W

( for rated load of AC 220V )

AC INPUT

Voltage , Frequency

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

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

Approximate 210

Natural Convection

Approximate 220

Operating ambient temperature

DIMENSIONS AND WEIGHT

Dimensions ( W x H x D )

Weight

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

Approximate 6 Kgs

5 to 40°C 10 – 80% R.H.

205 x 115 x 270 ( mm )

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.

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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

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5. EXPLANATION OF PANELS

5.1 FRONT PANEL

Fig. 5.1

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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.

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5.2 REAR

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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.

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• 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

6.3. PARALLEL OPERATION (MASTER /

SLAVE CONTROL)

Two or more units of the same model can be hooked up in parallel to give an increase in output current capacity. The total

• output current capacity will be the sum of the output currents of the individual units. In this mode of operation, one supply will act as the master and all settings are from the master unit

Note: When connecting the supplies in parallel, be sure that all the power supplies are turned OFF.

HOOK-UP PROCEDURES

1. Switch OFF the power of all units.

2. Switch the master/slave switch, FIG.6.3, on all the slave units from “MASTER” to “SLAVE” position.

3. Hook-up the IN/OUT terminals for MASTER/SLAVE operation as shown in FIG.6.3.

4. Connect the output terminals of each of the units to the load as shown in FIG.6.4. For proper performance, use all cables of same length and thickness.

5. Set the voltage and current adjustment knobs of all the slave units to the maximum position.

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6. Switch “ON” the MASTER unit and SLAVE units.

The output voltage and current then can be controlled to the desired value via the adjustment knobs on the MASTER unit.

In the case of output goes to “0” ampere in the parallel operation mode, output voltage can no longer be controlled by the master machine.

Be sure to keep a minimum current flowing that is at least several percent of the rated current at all time.

CONNECTION OF TERMINAL ON REAR

PANEL

While pressing on the slit portion of the terminal with a small screw driver, insert the connecting cable into the round hole. When insertion is completed, release the screw driver. (FIG.6.5)

FIG. 6.3

FIG. 6.4

FIG. 6.5

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7. MAINTENANCE

WARNING:

The following instructions are for use by qualified personnel only. To avoid electrical shock, do not perform any servicing other than those contained in the operating instructions unless you are qualified to do so.

7.1 MAIN FUSE REPLACEMENT

If the main fuse blows, the power on the LED indicator will not light and power supply will not operate. The fuse should not normally blow unless a problem has developed in the unit. Try to determine and correct the cause of the blown fuse, then replace only with a fuse of correct rating. The fuse is located on the rear panel and fuse rating can be found next to the fuse holder. If the problem persists, return the unit to the agent for further investigation.

7.2 CALIBRATION

This unit has accurately calibrated at the factory before shipment. Recalibration is recommended only if repairs have been made in a circuit affecting calibration accuracy, or if you have reason to believe the unit is out of calibration.

However, calibrations should be attempted only if a 3½ digit multimeter with an accuracy of +0.5% DCV or better and a 0 to 50ohm, 250 Watt adjustable resistive load is available.

If re-calibration is required, use the following procedures.

Locations of the electrical calibration on the main PCB are shown in FIG. 7.1.

FIG. 7.1

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7.3.

VOLTAGE CALIBRATION

1. Connect the multimeter to measure the DC voltage across the power supply (+) and () output terminals.

2. Turn on the power supply, and turn the panel VOLTAGE adjustment knob fully clockwise (maximum output).

3. Adjust trimmer VR11 for a reading (Vmax. +0.5) ±0.1 volts on the multimeter. Vmax is the maximum normal output of the specific model under calibration.

7.4. VOLTAGE ALIGNMENT

1. Set the output voltage to about half the maximum allowable output for respective model.

2. Align the voltmeter reading with the multimeter reading.

For BK Precision Analog series, adjust the trimmer VR-6 on the main PCB.

For BK Precision Digital series, adjust the trimmer VR-1 on the back of meter PCB.

7.5. CURRENT CALIBRATION

1. Connect the 0 – 50ohm / 250W resistive load in series with the multimeter to measure the DC output current terminals.

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2. Adjust trimmer VR-5 fully anti-clockwise (referring to the component side).

3. Adjust the output voltage to the maximum allowable output for respective model.

4. Adjust the variable resistive load to obtain (Imax +0.1)

±0.02 Ampere on the multimeter. Imax is the maximum nominal allowable output current of resistive model.

5. Adjust trimmer VR-5 clockwise slowly until the limiting point is just reached and the C.C. LED lights up at the same time.

7.6. AMMETER ALIGNMENT

1. Adjust the output voltage to half of its maximum allowable output voltage for respective model.

2. Adjust the variable resistive load to obtain half of its maximum allowable current for respective model.

3. Align the ammeter reading with the multimeter reading.

For BK Precision Analog series, adjust the trimmer VR-7 on the main PCB.

For BK Precision Digital series, adjust the trimmer VR-2 on the back of meter PCB.

Limited One-Year Warranty

B&K Precision Corp. warrants to the original purchaser that its products and the component parts thereof, will be free from defects in workmanship and materials for a period of one year from date of purchase.

B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts. Returned product must be accompanied by proof of the purchase date in the form of a sales receipt.

To obtain warranty coverage in the U.S.A., this product must be registered by completing a warranty registration form on www.bkprecision.com

within fifteen (15) days of purchase.

Exclusions: This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs. The warranty is void if the serial number is altered, defaced or removed.

B&K Precision Corp. shall not be liable for any consequential damages, including without limitation damages resulting from loss of use. Some states do not allow limitations of incidental or consequential damages. So the above limitation or exclusion may not apply to you.

This warranty gives you specific rights and you may have other rights, which vary from state-to-state.

B&K Precision Corp.

22820 Savi Ranch Parkway

Yorba Linda, CA 92887 www.bkprecision.com

714-921-9095

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Service Information

Warranty Service: Please return the product in the original packaging with proof of purchase to the address below. Clearly state in writing the performance problem and return any leads, probes, connectors and accessories that you are using with the device.

Non-Warranty Service: Return the product in the original packaging to the address below. Clearly state in writing the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Customers not on open account must include payment in the form of a money order or credit card. For the most current repair charges please visit www.bkprecision.com

and click on “service/repair”.

Return all merchandise to B&K Precision Corp. with pre-paid shipping. The flat-rate repair charge for Non-Warranty Service does not include return shipping. Return shipping to locations in North American is included for Warranty Service. For overnight shipments and non-North American shipping fees please contact B&K Precision Corp.

B&K Precision Corp.

22820 Savi Ranch Parkway

Yorba Linda, CA 92887 www.bkprecision.com

714-921-9095

Include with the returned instrument your complete return shipping address, contact name, phone number and description of problem.

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22820 Savi Ranch Parkway

Yorba Linda, CA 92887 www.bkprecision.com

© 2014 B&K Precision Corp.

Printed in China PN# 481-375-9-001 v072315

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