B+K precision 1673 Bedienungsanleitung

Model 1672, 1673

Triple Output Power Supply

INSTRUCTION MANUAL

1 Safety Summary

The following safety precautions apply to both operating and maintenance personnel and

must be observed during all phases of operation, service, and repair of this instrument.

Before applying power, follow the installation instructions and become familiar with the

operating instructions for this instrument.

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cabinet must be

connected to an electrical ground. This instrument is grounded through the

ground conductor of the supplied, three-conductor ac power cable. The power

cable must be plugged into an approved three-conductor electrical outlet. Do not

alter the ground connection. Without the protective ground connection, all

accessible conductive parts (including control knobs) can render an electric

shock. The power jack and mating plug of the power cable meet IEC safety

standards.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of flammable gases or fumes.

Operation of any electrical instrument in such an environment constitutes a

definite safety hazard.

KEEP AWAY FROM LIVE CIRCUITS

Instrument covers must not be removed by operating personnel. Component

replacement and internal adjustments must be made by qualified maintenance

personnel. Disconnect the power cord before removing the instrument covers

and replacing components. Under certain conditions, even with the power cable

removed, dangerous voltages may exist. To avoid injuries, always disconnect

power and discharge circuits before touching them.

DO NOT SERVICE OR ADJUST ALONE

Do not attempt any internal service or adjustment unless another person,

capable of rendering first aid and resuscitation, is present.

DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT

Do not install substitute parts or perform any unauthorized modifications to this

instrument. Return the instrument to B&K Precision for service and repair to

ensure that safety features are maintained.

WARNINGS AND CAUTIONS

WARNING and CAUTION statements, such as the following examples, denote a

hazard and appear throughout this manual. Follow all instructions contained in

these statements.

A WARNING statement calls attention to an operating procedure, practice, or

condition, which, if not followed correctly, could result in injury or death to

personnel.

A CAUTION statement calls attention to an operating procedure, practice, or

condition, which, if not followed correctly, could result in damage to or

destruction of parts or the entire product.

WARNING:

Do not alter the ground connection. Without the protective

ground connection, all accessible conductive parts (including

control knobs) can render an e

lectric shock. The power jack and

mating plug of the power cable meet IEC safety standards.

WARNING:

To avoid electrical shock hazard, disconnect power cord before

removing covers. Refer servicing to qualified personnel.

CAUTION:

Before connecting th

e line cord to the AC mains, check the rear

panel AC line voltage indicator. Applying a line voltage other

than the indicated voltage can destroy the AC line fuses. For

continued fire protection, replace fuses only with those of the

specified voltage and current ratings.

CAUTION:

This product uses components which can be damaged by electro

static discharge (ESD). To avoid damage, be sure to follow

proper procedures for handling, storing and transporting parts

and subassemblies which contain ESD-sensitive components.

SAFETY SYMBOL

This symbol on an instrument indicates that the user should refer to the

operating instructions located in the manual.

Electrical shock hazard.

Chassis ground symbol.

Compliance Statements

Disposal of Old Electrical & Electronic Equipment (Applicable in the European

Union and other European countries with separate collection systems)

This product is subject to Directive 2002/96/EC of the

European Parliament and the Council of the European

Union on waste electrical and electronic equipment

(WEEE), and in jurisdictions adopting that Directive, is

marked as being put on the market after August 13, 2005,

and should not be disposed of as unsorted municipal

waste. Please utilize your local WEEE collection facilities

in the disposition of this product and otherwise observe

all applicable requirements.

Table of Contents

1Safety Summary..........................................................................................................................1

2Introduction .................................................................................................................................5

3Installation....................................................................................................................................5

3.1 Initial Inspection..............................................................................................................5

3.2 Input Power Requirements.........................................................................................6

3.3 Location ...............................................................................................................................6

4Controls and Indicators...........................................................................................................7

4.1 Front Panel.........................................................................................................................7

4.2 Rear Panel...........................................................................................................................8

5Operating Instructions ............................................................................................................9

5.1 Setting the Output Voltage and Output Current ................................................9

5.2 Constant Voltage (CV) /Constant Current (CC) Mode.....................................9

5.3 System Configuration .................................................................................................10

5.3.1 Independent Mode............................................................................................10

5.3.2 Series Tracking Mode ......................................................................................10

5.3.3 Parallel Tracking Mode ...................................................................................11

5.3.4 Multiple Units in Series Mode ......................................................................12

5.3.5 Multiple Units in Parallel Mode...................................................................13

5.3.6 Fixed 5V/3A Output .........................................................................................14

6Specifications............................................................................................................................15

7Maintenance..............................................................................................................................16

7.1 Preventive Steps ...........................................................................................................16

7.2 When the Unit is Not Turning On..........................................................................17

7.3 Fuse Replacement ........................................................................................................17

8Service Information ...............................................................................................................18

9Limited Two-Year Warranty..............................................................................................19

2 Introduction

Description

B&K Precision’s 1672 and 1673 triple output DC power supplies provide two variable

outputs (0 – 32V/ 0 – 3A [model 1672], 0-6A [model 1673]) and one fixed output (5V/3A).

The variable outputs can work independently, in series tracking, or parallel mode.

Conveniently adjust voltage and current with independent front panel knobs and bright

quad display. These power supplies are ideally suited for applications in electronic test,

production, and service, where multiple independent DC power supplies are required and

bench space is at a premium.

Features

•Three independent outputs

•Individual control of voltage and current controls for variable outputs

•CV (constant voltage)/CC (constant current) mode operation

•Separate 3-digit displays for voltage and current for variable outputs

•LED indication for CV/CC mode

•Overload indication LED for fixed output

•Series tracking and parallel mode operation

•Power On/Off switch on front panel

•Input voltage selection on rear side (115 Vac/ 230 Vac)

3 Installation

3.1 Initial Inspection

This unit is tested prior to shipment. It is therefore ready for immediate use upon receipt.

The initial physical inspections should be made to ensure that no damage has been

sustained during shipment.

Inspect the packing box on receipt for any external damage. If any external damage is

evident, remove the instrument and visually inspect its case and parts for any damage. If

damage to the instrument is evident, a description of the damage should be noted on the

carrier’s receipt and signed by the driver or carrier agent. Save all shipping packaging for

inspection. Forward a report of any damage to the agent through which the unit is

procured.

Retain the original packing in case subsequent repackaging for return is required. Use of

the original packing is essential.

After the mechanical inspection, verify the contents of the shipment. The items included

with the instrument are:

•Power cord

•Instruction manual

•Pair of test leads (x2)

If the contents are incomplete, or if the instrument does not pass the specification

acceptance tests, notify the local service center.

3.2 Input Power Requirements

The instrument can operate on 115 V or 230 V AC source at 50 or 60 Hz. The line selector

plug on the rear panel allows you to select the line voltage. Before connecting the power

plug to an AC line outlet, be sure to check that voltage selector plug is set in the correct

position corresponding to the line voltage in your location and the fuse rating is as shown

in the table.

Selector Line Voltage Fuse

115V

100 ~ 125V 50/60 Hz

6A (model 1672)

10A (model 1673)

230V

220 ~ 240V 50/60 Hz

3A (model 1672)

6A (model 1673)

Figure 1 – Fuse Table

3.3 Location

Before applying power to unit, make sure that input voltage setting is correct and the

ventilation holes are not blocked. Ensure that the ventilation fan located on the rear panel

is working well (it should turn on when powered on). Do not load the output if ventilation

fan is not working otherwise it may cause the power supply to overheat.

4 Controls and Indicators

4.1 Front Panel

Figure 2 – Front Panel

1) Power switch

2) Negative output terminal of the fixed 5V/3A output

3) Positive output terminal of the fixed 5V/3A output

4) Overload indicator LED for fixed 5V/3A output

5) Negative output terminal of the master output

6) Ground terminal of the master output

7) Positive output terminal of the master output

8) CC mode LED for the master to indicate constant current

9) CV mode LED for the master to indicate constant voltage

10) Master voltage adjustment knob with push/pull switch mechanism for series tracking

mode operation

11) Master current adjustment knob with push/pull switch mechanism for parallel mode

operation

12) Master voltage indicator display (3-digit green 0.56” LED)

13) Master current indicator display (3-digit red 0.56” LED)

14) Series mode indicator LED

15) Parallel mode indicator LED

16) Slave voltage indicator display (3-digit green 0.56” LED)

17) Slave current indicator display (3-digit red 0.56” LED)

18) Voltage adjustment knob for adjusting slave output voltage when master power is in

CV mode

19) Current adjustment knob for adjusting slave output current when master power is in

CC mode

20) Negative output terminal of the slave output

21) Ground terminal of the slave output

22) Positive output terminal of the slave output

23) CC mode LED for the slave to indicate constant current

24) CV mode LED for the master to indicate constant voltage

4.2 Rear Panel

Figure 3 – Rear Panel

25) Heat sink for dissipating the heat of power devices

26) Fan ventilation (80mm 12V DC Fan)

27) Power input socket

28) Fuse holder and input line selector

29) Input line voltage indicator (refer to mark)

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