B+K precision 1693 Manual de usuario

Model 1693, 1694

Switching DC 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 electric 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 SYMBOLS

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

operating instructions located in the manual.

Certification

We certify that this product met its published specifications at time of shipment from the

factory.

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.

Contents

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

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

3 Installation ................................................................................................ 6

3.1 Initial Inspection................................................................................ 6

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

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

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

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

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

5.1 Instrument Hook-Up ....................................................................... 10

5.2 Using Both Main and Auxiliary Outputs.......................................... 11

5.3 Remote Sensing............................................................................... 11

5.3.1 Connection .............................................................................. 11

5.3.2 Disconnection.......................................................................... 12

5.4 Remote Control............................................................................... 12

5.4.1 Voltage Remote Control.......................................................... 12

5.4.2 Enable and Disable the Output ............................................... 15

6 Maintenance........................................................................................... 16

6.1 When the Unit is Not Turning On ................................................... 16

6.2 Fuse Replacement........................................................................... 16

6.3 Instrument Repair Service............................................................... 17

7 Specifications .......................................................................................... 18

8 Certification ............................................................................................ 20

9 Service Information ................................................................................ 21

10 Limited One-Year Warranty.................................................................... 22

2 Introduction

B&K Precision models 1693 and 1694 switching mode DC power supplies provide

high current output in a lightweight and compact package. It is suitable for a variety

of uses, especially for powering DC operated mobile radio equipment on the bench.

These 900W power supplies provide a variable voltage output from 1 V to 15 V at 60

A (model 1693) or from 1 V to 30 V at 30 A (model 1694). In addition, a remote

sensing terminal is available for use to compensate for voltage drops due to

resistances from load leads. The output voltage level can also be externally controlled

via an analog remote control terminal. Switching mode power supplies have the

advantage of being lightweight and high in efficiency when compared to traditional

linear mode power supplies. The efficiency can exceed 85% under optimal conditions.

Bright 3-digit LED displays give an accurate and highly readable indication of settings.

Features

•Up to 60 A output current

•Lightweight and compact

•Dual 3-digit LED displays

•Remote sense terminal

•Analog remote control via external voltage source or variable resistor

•Current foldback circuitry with illuminated indicator prevents overloading

the power supply

•Overtemperature protection circuitry

•Overvoltage protection

•Front panel auxiliary output

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

•Remote control connector

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 power supply has a universal input and can operate in any country that uses a

mains voltage within 100-240 VAC, 50Hz/60Hz.

4 Controls and Indicators

4.1 Front Panel

Figure 1 - Front Panel

(1) Voltage and Ammeter LED Display

(2) Overload LED Indicator – Overload (Constant Current Limiting) and Short-

Circuit Protection

(3) Output Voltage Control Knob – Control Both Main and Auxiliary Output

(4) Power ON/OFF Switch

(5) Power ON/OFF LED

(6) Auxiliary Output Terminal (max 5 A for 1693, max 3 A for 1694)

Note: Please see Section 5.2 for more details on using both main and

auxiliary output terminals together.

4.2 Rear Panel

Figure 2 - Rear Panel

(7)Main Output Terminal (rated 60 A for 1693 / 30 A for 1694)

Note: Please see Section 5.2 for more details on using both main and

auxiliary output terminals together.

(8) Remote Sensing Terminal

(9) Analog Remote Control Terminal

(10) Analog Remote Control ON/OFF Switch

(11) Cooling Fan Air Intake Grille

(12) AC Input Plug

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