B+K precision 1670A Bedienungsanleitung

INSTRUCTION

MANUAL MODEL 1670A

INSTRUCTION

MANUAL

MODEL 1670A

Triple Output

DC POWER SUPPLY

TEST INSTRUMENT SAFETY

WARNING

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 under test is the "hot chassis" type, a serious shock hazard exists unless the equipment is unplugged (just

turning off the equipment does not remove the hazard), or an isolation transformer is used.

b. If the equipment under test is "powered up" (and that equipment uses high voltage in any of its circuits), the power supply

outputs may be floated to the potential at the point of connection. Remember that high voltage may appear at unexpected

points in defective equipment. Do not float the power supply output to more than 100 volts peak with respect to chassis or

earth ground.

c. If the equipment under test is "off" (and that equipment uses high voltage in any of its circuits under normal operation),

discharge high-voltage capacitors before making connections or tests. Some circuits retain high voltage long after the

equipment is turned off.

2. Use only a polarized 3-wire ac outlet. This assures that the power supply chassis, case, and ground terminal are connected to

a good earth ground and reduces danger from electrical shock.

3. Don't expose high voltage needlessly. Remove housings and covers only when necessary. Turn off equipment while making

test connections in high-voltage circuits. Discharge high-voltage capacitors after removing power.

(Continued on inside back cover)

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:

Instruction Manual

For

Model 1670A

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

INTRODUCTION

The B+K Precision Model 1670A 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 3 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 1670A 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.

SPECIFICATIONS

OUTPUT NO. 1

VOLTAGE

Variable 0-30 VDC

CURRENT

0 to 3 Amps

POLARITY

Positive or Negative

CONNECTORS

Binding Posts

REGULATION TYPE

Constant Voltage or Constant Current

CONSTANT VOLTAGE MODE

LOAD REGULATION (0 to rated output)

≤0.05% + 10 mV

LINE REGULATION (108 TO 132 VAC)

≤0.05% + 10 mV

RIPPLE AND NOISE

≤5 mV rms

CONSTANT CURRENT MODE

LOAD REGULATION

≤0.4% + 10 mA

LINE REGULATION (108 TO 132 VAC)

≤0.4% + 10 mA

RIPPLE AND NOISE

≤ 10 mA rms

PROTECTION

Current limiting, short circuit protection, reverse polarity protection

VOLTAGE INDICATOR

3 digit LCD

VOLTAGE RESOLUTION

0.1 V

VOLTAGE ACCURACY

± (1% reading + 2 digit)

CURRENT INDICATOR

3 digit LCD

AMMETER RESOLUTION

±0.01A

AMMETER ACCURACY

± (1% reading + 2 digit)

OUTPUT NO. 2

VOLTAGE

Fixed 12 VDC ±5%

CURRENT

0 to 500 mA continuous

POLARITY

Positive or Negative

CONNECTORS

Wire clips

LOAD REGULATION (no load to 500 mA)

≤1%

LINE REGULATION

≤ 1%

RIPPLE AND NOISE

≤5 mV rms

PROTECTION

Short circuit protection, thermal overload protection

OUTPUT NO. 3

VOLTAGE

Fixed 5 VDC ±5%

CURRENT

0 to 500 mA continuous

POLARITY

Positive or Negative

CONNECTORS

Wire Clips

LOAD REGULATION (no load to 500 mA)

≤1%

LINE REGULATION

≤ 1%

RIPPLE AND NOISE

≤5 mV rms

PROTECTION

Short circuit protection, thermal overload protection

SPECIFICATIONS

COOLING

Variable speed thermal static control fan

AC INPUT

115/230 VAC, 50/60 Hz~ (~Alternate current)

POWER CONSUMPTION

165W

OPERATION TEMPERATURE

0º TO 40º C, 10-80%R.H.

(80% relative humidity for temperature up to 31º C

decreasing linearly to 50% relative humidity at 40º C)

STORAGE TEMPERATURE

-15º TO 70º C, ≤85% R.H.

ENVIRONMENTAL CONDITIONS

- 10-80% R.H.

- Altitude up to 2000m

- Installation category: CAT II

- Pollution degree: 2

- Mains supply voltage fluctuation up to ±10% of normal voltage

DIMENSIONS (H x W x D)

4.9" x 8.5" x 9.5" (124 x 216 x 242mm)

WEIGHT approx.

10 lbs (4.5 kg)

ACCESSORIES SUPPLIED

Instruction Manual

Spare fuse

OPTIONAL ACCESSORIES

Power Supply Hook-up Cables, Model TL 5A

LINE SELECTION

The 1670A can operate on 115V AC or 230V AC line

input. Before connecting the power cord to the AC

outlet, make sure the voltage selector on the bottom of

the unit is set to the correct line voltage. Additionally,

please check that you have the fuse inserted in the

fuse box below the AC input receptacle. The fuse to

use is referenced below:

LINE VOLTAGE 115V 230V

FUSE VALUE F3AL250V F1.6AL250V

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