B+K precision 1670A Manual de usuario
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
i
ii
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.
1
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)
2
3
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
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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