B+K precision 1687B Bedienungsanleitung

Model 1685B, 1687B, 1688B

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 the

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 .............................................................................................. 6

3 Controls and Indicators............................................................................. 7

3.1 Front Panel........................................................................................ 7

3.2 Rear Panel ......................................................................................... 8

4 Operating Instructions .............................................................................. 9

4.1 Using the Power Supply .................................................................. 10

4.1.1 Connection .............................................................................. 10

4.1.2 Self Test Sequence .................................................................. 10

4.1.3 Control Knobs.......................................................................... 12

4.1.4 Using Both Main and Auxiliary Outputs.................................. 13

4.2 Control Modes ................................................................................ 13

4.2.1 Normal Mode .......................................................................... 14

4.2.2 Preset Mode............................................................................ 14

4.2.3 Set Mode................................................................................. 15

4.2.4 Analog Remote Control Mode ................................................ 16

5 Remote Control....................................................................................... 16

5.1 Analog Remote Control................................................................... 16

5.1.1 Using Two External Variable DC Voltage Sources................... 18

5.1.2 Using Two 5 kΩ Variable Resistors.......................................... 19

5.1.3 Enable and Disable the Output ............................................... 20

5.2 PC Interface Control........................................................................ 21

5.2.1 General Functions and Display................................................ 21

5.2.2 External Timed Program ......................................................... 22

5.2.3 Internal Preset Memory.......................................................... 23

5.2.4 Data Log .................................................................................. 24

5.2.5 Settings.................................................................................... 26

5.2.6 Command Set.......................................................................... 26

6 Faults and Troubleshooting .................................................................... 31

6.1 OVP: Overvoltage Protection ......................................................... 31

6.2 OTP: Overtemperature Protection................................................. 31

6.3 OLP: Overload Protection............................................................... 32

6.4 Fuse Replacement........................................................................... 33

7 Specifications .......................................................................................... 34

8 Certification ............................................................................................ 36

9 Service Information ................................................................................ 37

10 Limited Two-Year Warranty.................................................................... 38

2 Introduction

B&K Precision models 1685B, 1687B, and 1688B are laboratory grade switching mode

DC power supplies with high current output in a small form factor and lightweight

package. The 1685B Series provides various configurations of output voltage and

current, and make setting voltage and current levels fast and precise through its dual

action, coarse/fine rotary encoder control knobs. In addition to its constant voltage

(CV) and constant current (CC) modes, the high efficiency DC power supply offers a

unique solution with its preset and analog remote control modes. Save up to three

different presets of voltage and current values for quick recall. The analog remote

control function allows the output power, voltage, and current to be adjusted

without touching the front panel of the power supply. These features make the

1685B Series suitable for a wide range of applications including production testing,

telecommunications, R&D, service, and university labs.

Features

•Automatic CV/CC crossover operation

•Lightweight and compact

•Rotary encoder control for precise voltage and current setting

•Save up to 3 user-defined voltage and current presets for quick recall

•PC software for remote control and external timed programming

•Analog remote control function

•USB interface

•Front panel auxiliary output

•Overvoltage, overtemperature, and overload protection

3 Controls and Indicators

3.1 Front Panel

Figure 1 - Front Panel

(1) LED panel meter display with CV/CC indicator

(2) Rear Control Indicator (lights up when using Preset/Remote Control/Set mode)

(3) Output Voltage Control Knob (control main and auxiliary output voltage)

(4) Output Current Control Knob (control main and auxiliary output current limit)

(5) Power ON/OFF Switch

(6) Auxiliary Output Terminal (max 5 A)

Note: Please see Section 4.1.4 for more details on using both main and

auxiliary output terminals together.

3.2 Rear Panel

Figure 2 - Rear Panel

(7) Main Output Terminal (max 5 A for 1685B / 10 A for 1687B / 20 A for 1688B)

Note: Please see Section 4.1.4 for more details on using both main and

auxiliary output terminals together.

(8) Mode Selection Switch (Normal, Preset, Remote Control, Set Modes)

(9) Recall Preset Selection Switch

(10)Analog Remote Control Terminal

(11)Cooling Fan Air Intake Grille

(12) AC Input Plug and Fuse Compartment

(13) USB Port (for PC remote control)

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