B&K Precision 1671A User Manual

INSTRUCTION

MANUAL MODEL 1671A

INSTRUCTION

MANUAL

MODEL 1671A

Triple Output

DC POWER SUPPLY

U

L

C

US

TEST INSTRUMENT SAFETY

WARNING

Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing must
sometimes be performed where exposed high voltage is present. An electrical shock causing 10 milliamps of current to pass
through the heart will stop most human heartbeats. Voltage as low as 35 volts dc or ac rms should be considered dangerous
and hazardous since it can produce a lethal current under certain conditions. Higher voltages are even more dangerous. Your
normal work habits should include all accepted practices to prevent contact with exposed high voltage, and to steer current
away from your heart in case of accidental contact with a high voltage. Observe the following safety precautions:

1. There is little danger of electrical shock from the dc output of this power supply. However, there are several other possible test

conditions using this power supply that can create a high voltage shock hazard:

a. If the equipment und er t est is the "hot ch assis " type, a serious shock haz ard exists unless t he e quipm ent is unplugged (j ust

turning off the equip ment do es not remove the hazard), or an iso latio n trans former is used.

b. If the equipment und er t est is "powered up" (an d th at e quipm ent uses high volta ge i n an y of its circuits), the pow er s upply

outputs may be floa ted to the pot ential at the point of con necti on. Rem ember that h igh vol tage may app ear at unexpected

points in def ective equipmen t. Do not f loat the powe r supply outp ut to more than 100 volt s peak w ith respect t o c hassis or

earth ground.

c. If th e e quipment under tes t is "off" (and tha t e quipment uses high voltage in any of its circuits under no rmal operation) ,

discharge high-voltage capacitors before ma king conne ction s or tests. Some circui ts retain high vol tage long after the

equipment is turned off.

2. Use only a polarized 3- wire ac outlet. This assur es t hat the power supply ch assis , ca se, and ground terminal are conn ected to

a good earth ground and reduces da nger fr om elec trical shock.

3. Don't expose high vo ltage needlessly. Remov e housings and cover s only when necessary. Tur n off equipm ent wh ile ma king

test connections in high-vol tage ci rcuit s. Discharge h igh-v oltag e capacitors after removing po wer.

(Continued on inside back cove r)

Instruction Manual

For

Model 1671A

Triple Output

DC POWER SUPPLY

B&K Precision Corporation

22820 Savi Ranch Parkway

Yorba Linda, California 92887

TABLE OF CONTENTS

Page

TEST INSTRUMENT SAFETY.........................inside front cover

INTRODUCTION.........................................................................1

SPECIFICATIONS........................................................................2

CONTROLS AND INDICATORS................................................5

OPERATING INSTRUCTIONS...................................................7

Safety Precautions...................................................................7

Equipment Protection Precautions..........................................7

Power Supply Hook-up and Operation....................................7

Variable Voltage Output....................................................7

Typical Constant Voltage Output......................................8

Setting Current Limit........................................................8

Typical Constant Current Operation.................................8

Page

Constant Voltage/Current Characteristics.........................9

12 Vdc Output...................................................................9

5 Vdc Output...................................................................10

Dual or Triple Output............................................................10

Connecting Outputs in Series................................................10

MAINTENANCE........................................................................12

Fuse Replacement..................................................................12

Instrument Repair Service.....................................................12

SERVICE INFORMATION.........................................................13

LIMITED ONE-YEAR WARRANTY........................................14

TEST INSTRUMENT SAFETY.........................inside back cover

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INTRODUCTION

The B+K Precision Model 1671A is a general purpose triple
output DC power supply. Their main outputs are versatile constant
voltage or constant current regulated power source that is variable
from 0 to 30 volts and 0 to 5 amps. An indicator lights in the
constant current mode, and serves as an overload indicator in the
constant voltage mode.

While this model is competitively priced with most single
output power supplies, they have the added advantage of fixed 5
volt and 12 volt outputs capable of providing up to 0.5 amps each.
One common application for these power supply is powering of
circuit boards while troubleshooting. Many circuit boards require
two or three input voltages, with the most common values being 5
volts and 12 volts. These power supplies can provide up to three
outputs simultaneously. Since each output is fully isolated, any
output can be connected for positive or negative polarity.

The main output voltage and current are continuously
monitored by two digital LCD meters with resolution of 0.1 volt
and 0.01 amp.

The Model 1671A can operate continuously at its maximum
rated output and is fully overload protected.

This manual provides the information to help assure the
maximum performance and longest life for your power supply.

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